JP2009121890A - Apparatus and program for determining operation condition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus which pays attention to operation-related values such as power-saving, silence, accuracy improvement, and outputtable speed increase in an electrodynamic vibration test apparatus, takes the operation limit of a vibration generator into consideration, and calculates an optimum operation condition for allowing the operation-related values to which attention has been paid to fulfill predetermined conditions. <P>SOLUTION: In order to find out the optimum operation condition, an estimated characteristics calculation means 34 calculates estimated characteristics in an estimated exciting current, which is an exciting current to be provided to an exciting coil 4 changed from a standard value. An estimated drive current calculation means 36 calculates what estimated drive current should be provided to a drive coil 10 in order to achieve required exciting force characteristics for each estimated exciting current on the basis of estimated characteristics. An estimated temperature calculation means 38 estimates the temperature of the exciting coil 4 and the drive coil 10 when the vibration generator 1 is operated by each estimated exciting current and each estimated drive current by changing the estimated cooling ability of a cooling blower 16. An operation condition selection means 40 selects the optimum operation condition on the basis of the operation-related values, to which attention has been paid, out of the ones which fulfill temperature conditions. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an operating condition determining apparatus capable of determining an appropriate operating condition of a vibration generator according to the purpose and situation of a vibration test.

  FIG. 1 shows the internal structure of the electrodynamic vibration generator 1. An excitation coil 4 is provided inside the magnetic circuit 2. At the center portion, the movable portion 6 is held by an air suspension 8 so as to be movable up and down. The upper part of the movable part 6 can fix a specimen to be subjected to a vibration test. A drive coil 10 is provided below the movable portion 6.

  By passing a direct current through the exciting coil 4, a direct magnetic field is formed in the gap portion 12. The driving coil 10 is provided in the gap 12, and the movable part 6 is vibrated up and down by passing an alternating current through the driving coil 10. Thereby, the specimen attached to the upper part of the movable part 6 is vibrated.

  A duct 14 is provided below the magnetic circuit 2, and a cooling blower 16 is attached to the end of the duct 14. By rotating the cooling blower 16, air can be sucked through the duct 14, and the air can be guided to the inside from the air hole 18 above the magnetic circuit 2. Thereby, the exciting coil 4 and the drive coil 10 can be cooled. Here, the case of the air cooling type will be described as an example. However, if attention is paid to the power consumption and generated noise of the cooling device, the present invention can be similarly applied to the case of the water cooling type.

  FIG. 2 shows a block diagram of a vibration test system configured using the vibration generator 1 of FIG. A specimen 20 is fixed to the movable part 6 of the vibration generator 1. An excitation current is supplied from the excitation power supply 26 to the excitation coil 4. A current is supplied from the blower power supply 28 to the cooling blower 16. A vibration frequency spectrum to be given to the specimen 20 is set in the vibration controller 22. The drive signal from the vibration controller 22 is amplified by the amplifier 24 and is given to the drive coil 10. The vibration due to this is measured by the acceleration sensor 30 provided in the movable part 6 and given to the vibration controller 22. Receiving this, the vibration controller 22 performs a Fourier transform on the measured vibration waveform and calculates its frequency spectrum. Then, the frequency spectrum of the drive signal is calculated based on the difference between the frequency spectrum of the vibration waveform and the set desired frequency spectrum. Then, the frequency spectrum of the drive signal is subjected to inverse Fourier transform to calculate the drive signal and output to the amplifier 24. In this way, vibration having a target frequency spectrum can be given to the specimen.

  In addition to the test (random test) that is performed by giving the frequency spectrum of the target vibration as described above, the test (sweep test) that is performed by applying the sine wave vibration whose frequency is swept temporally, There are also tests (shock tests) that give pulsating vibrations.

JP 2001-13033 A

  In the conventional vibration test system as described above, the excitation current value of the excitation power supply 26 for the excitation coil 4 is determined and shipped in accordance with the maximum excitation force, and this can be changed by the operator during use. There wasn't. Therefore, even when only a small excitation force is required, the operator has not been able to make adjustments such as reducing the excitation current to reduce the total power consumption.

  Even if the operator can change the excitation current, in order to predict the effect of changing the excitation current, specialized knowledge is required and is not easy. For example, on the premise that the target excitation force is obtained, if the excitation current is reduced, the drive current must be increased. Therefore, depending on the balance between the excitation current and the drive current, just because the excitation current is reduced does not always reduce the overall power consumption.

  Japanese Patent Application Laid-Open No. H10-228561 discloses a technique for saving excitation power by reducing the excitation current when the required excitation force is small. However, even if the excitation power is saved, if the drive power increases further as a result, the system as a whole cannot obtain the result of power saving.

  In addition to this, Patent Document 1 discloses that the rotational speed of the cooling blower is reduced when the required excitation force is small in order to achieve the purpose of silence. However, since this also attempts to solve the problem of heat generation by focusing only on the exciting coil, it cannot solve the problem of exceeding the limit temperature due to the increase in the amount of heat generated by the drive coil, even if the purpose of silence is achieved. It was.

  In consideration of the above-mentioned problems, the present invention pays attention to operation-related values such as power saving, noise reduction, accuracy improvement, and increase in output possible speed, and attention is paid to the operation limit of the vibration generator. An object of the present invention is to provide an apparatus for calculating an operation condition for the operation-related value to satisfy a predetermined condition.

  Several aspects of the operating condition determining apparatus according to the present invention will be described below.

(1) An operating condition determining apparatus according to the present invention includes an exciting coil that generates a static magnetic field, a driving coil that is provided in the static magnetic field generated by the exciting coil and is driven by electromagnetic force, and driving the driving coil Is an operating condition determining device for determining operating conditions of a vibration generator including a movable part for transmitting a vibration to the specimen and a cooler for cooling the excitation coil and the drive coil. Reference characteristic acquisition means for acquiring, as a reference characteristic, a drive current / voltage / acceleration frequency characteristic indicating a relationship between a drive current / voltage frequency and acceleration when the specimen is mounted and driven by a reference excitation current / voltage; When the excitation current / voltage value is changed from the reference excitation current / voltage, the drive current / voltage / acceleration frequency characteristics at each assumed excitation current / voltage are based on the reference characteristics. Assumption characteristic calculation means for calculating as an assumed characteristic, and an assumption for calculating a frequency characteristic of an assumed driving current / voltage necessary for obtaining a required acceleration characteristic based on the assumed characteristic based on the assumed characteristic When the driving current / voltage calculation means and the cooling capacity of the cooler are operated with the assumed cooling capacity, the excitation when the assumed exciting current / voltage is applied to the exciting coil under the respective assumed cooling capacity. The assumed temperature calculation means for calculating the assumed temperature of the coil and the assumed temperature of the drive coil when the assumed drive current / voltage is applied to the drive coil, and among the plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity, When the vibration generator is operated in combination, the expected temperature of the excitation coil and the drive coil does not exceed the predetermined temperature, and the relevant operation-related value satisfies the predetermined condition. Combined with the operating condition selection means for selecting as the operation conditions, such as, and a driver condition detecting force means for outputting the selected operating conditions.

  Therefore, it is possible to determine an operating condition that satisfies the temperature condition and the driving-related value of interest satisfies the predetermined condition.

(2) In the operating condition determining device according to the present invention, the operating condition selecting means is configured such that the assumed temperature of the exciting coil and the driving coil exceeds a predetermined temperature among a plurality of combinations of the assumed exciting current / voltage and the assumed cooling capacity. And a combination that satisfies the conditions that the total power of the assumed excitation power at the assumed excitation current / voltage, the assumed drive power at the assumed drive current / voltage, and the assumed cooling power to obtain the assumed cooling capacity is satisfied. It is characterized by being selected as a condition.

  Therefore, it is possible to set an operating condition that minimizes power consumption when the entire system is viewed.

(3) In the operating condition determining device according to the present invention, the operating condition selecting means is configured such that the assumed temperature of the exciting coil and the driving coil exceeds a predetermined temperature among a plurality of combinations of the assumed exciting current / voltage and the assumed cooling capacity. In addition, a combination that satisfies the condition that the cooling noise is minimized is selected as the operating condition.

  Therefore, it is possible to set an operation condition that minimizes the cooling noise when the entire system is viewed.

(4) In the operating condition determination device according to the present invention, the reference characteristic acquisition means acquires at least two reference characteristics for at least two reference excitation currents / voltages having different voltages or currents, and the assumed characteristic calculation means includes: An assumed characteristic is calculated based on the two or more reference characteristics.

  Therefore, the assumed characteristics can be estimated more accurately.

(10) An operating condition determining apparatus according to the present invention includes an exciting coil that generates a static magnetic field, a driving coil that is provided in the static magnetic field generated by the exciting coil and is driven by electromagnetic force, and driving the driving coil An operating condition determining device for determining operating conditions of a vibration generator comprising a movable part for transmitting a vibration to a specimen and a cooler for cooling the excitation coil and the drive coil, wherein the vibration generation The vibration frequency is changed over time by the machine, and the specimen is vibrated. When the specimen is attached to the moving part and driven by the reference excitation current / voltage, the frequency and acceleration of the drive current / voltage Reference characteristic acquisition means for acquiring a drive current / voltage / acceleration frequency characteristic indicating the relationship as a reference characteristic, and driving necessary for realizing the required acceleration characteristic based on the reference characteristic Calculate the current / voltage for each excitation frequency, find the excitation frequency that requires the largest drive current / voltage, and change the excitation current / voltage value from the reference excitation current / voltage. In this case, the driving current / voltage / acceleration frequency characteristics for each assumed excitation current / voltage are calculated as assumed characteristics based on the reference characteristics, and the assumed characteristics are calculated based on the assumed characteristics. When it is assumed that the vibration is fixed at the target excitation frequency under the characteristics, the first assumed drive current / voltage necessary for obtaining the acceleration characteristic required at the target excitation frequency is calculated. When the first assumed driving current / voltage calculating means and the cooling capacity of the cooler are operated at the assumed cooling capacity, the assumed exciting current / voltage is calculated based on the assumed cooling capacity. The first assumed temperature calculating means for calculating the assumed temperature of the exciting coil when given to the driving coil and the assumed temperature of the driving coil when the assumed driving current / voltage is given to the driving coil, the assumed exciting current / voltage and the assumed cooling capacity When the vibration generator is operated with the combination, the assumed temperature of the excitation coil and the drive coil does not exceed the predetermined temperature, and the relevant operation-related value satisfies the predetermined condition Based on the excitation operation condition selection means for selecting the assumed excitation current / voltage in such a combination as the excitation operation condition and the drive current / voltage / acceleration frequency characteristics at the assumed excitation current / voltage under the excitation operation condition, A second assumption for calculating a temporal change in the second assumed driving current / voltage to satisfy the required acceleration when the vibration frequency is changed. When the dynamic current / voltage calculation means and the cooling capacity of the cooler are operated with the assumed cooling capacity, the excitation coil is supplied with the expected excitation current / voltage according to the excitation operation conditions under the respective assumed cooling capacity. And a second assumed temperature calculating means for calculating a temporal change in the assumed temperature of the exciting coil when the assumed temperature of the exciting coil and an assumed driving current / voltage are applied to the driving coil. Select the assumed cooling capacity as the cooling operation condition so that the expected temperature of the excitation coil and drive coil does not exceed the predetermined temperature and the relevant operation-related value satisfies the predetermined condition when the generator is operated Cooling operation condition selection means for operating, and operation condition output means for outputting the excitation operation condition and the cooling operation condition as operation conditions.

  Therefore, even when the excitation frequency changes with time, such as in a sweep test, it is possible to determine an operation condition that satisfies the temperature condition and the operation-related value of interest satisfies a predetermined condition. it can.

(11) In the operating condition determining device according to the present invention, the operating condition selecting means is configured such that the assumed temperature of the exciting coil and the driving coil exceeds a predetermined temperature among a plurality of combinations of the assumed exciting current / voltage and the assumed cooling capacity. And a combination that satisfies the conditions that the total power of the assumed excitation power at the assumed excitation current / voltage, the assumed drive power at the assumed drive current / voltage, and the assumed cooling power to obtain the assumed cooling capacity is satisfied. It is characterized by being selected as a condition.

  Therefore, it is possible to set an operating condition that minimizes power consumption when the entire system is viewed.

(12) In the operation condition determination device according to the present invention, the excitation operation condition selection means is configured such that the assumed temperature of the excitation coil and the drive coil exceeds a predetermined temperature among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity. A combination that satisfies the condition that the total power of the assumed excitation power at the assumed excitation current / voltage, the assumed drive power at the assumed drive current / voltage, and the assumed cooling power for obtaining the assumed cooling capacity is minimized. It is characterized by being selected as an operating condition.

  Therefore, it is possible to set an operation condition that minimizes the cooling noise when the entire system is viewed.

(13) In the operating condition determination device according to the present invention, the reference characteristic acquisition means acquires at least two reference characteristics for at least two reference excitation currents / voltages having different voltages or currents, and the assumed characteristic calculation means includes: An assumed characteristic is calculated based on the two or more reference characteristics.

  Therefore, the assumed characteristics can be estimated more accurately.

  In the present invention, "reference characteristic acquisition means" corresponds to step S2 in the embodiment.

  In the embodiment, the “assumed characteristic calculation unit” corresponds to step S4.

  In the embodiment, “assumed driving current / voltage calculating means” corresponds to step S5. Throughout this specification, “current / voltage” means current and / or voltage.

  In the embodiment, “assumed temperature calculation means” corresponds to step S9.

  “Operating condition selection means” corresponds to steps S13 and S15 in the embodiment.

  The “program” is a concept that includes not only a program that can be directly executed by the CPU, but also a source format program, a compressed program, an encrypted program, and the like.

BEST MODE FOR CARRYING OUT THE INVENTION

one. First Embodiment Overall Configuration FIG. 3 shows a configuration of a vibration test system using the operating condition determining apparatus 100 according to the present invention. The operating condition determining apparatus 100 determines a preferable operating condition that matches the purpose, and controls the variable excitation power source 26 and the variable blower power source 28 based on this. This embodiment is suitable for a random vibration test in which a test is performed by applying vibration having a desired frequency spectrum to the specimen, but it can be applied to a test performed by sweeping the frequency.

  In FIG. 4, the functional block diagram of the driving | running condition determination apparatus 100 is shown. The reference characteristic acquisition means 32 fixes the specimen 20 to be measured to the movable part 6 of the vibration generator 1 and applies the reference excitation current / voltage to the excitation coil 10. A drive current / voltage / acceleration frequency characteristic indicating the relationship is acquired as a reference characteristic (see H0 in FIG. 5A).

  If the specimen 20 is already known and recorded with reference characteristics, it is obtained by reading it.

  If the specimen 20 has no known reference characteristic, a command is given to the vibration controller 22 to acquire the reference characteristic from the vibration controller 22. The vibration controller 22 applies a drive current / voltage having a spectrum equivalent to white noise to the drive coil while the specimen 20 is fixed, and measures the vibration at that time by the acceleration sensor 30 as a response signal. The vibration controller 22 calculates a drive current / voltage / acceleration frequency characteristic indicating the relationship between the drive current / voltage frequency and acceleration based on the frequency spectrum of the response signal. The driving condition determination device 100 acquires the drive current / voltage / acceleration frequency characteristics calculated by the vibration controller 22 as reference characteristics.

  The assumed characteristic calculation means 34 predicts the drive signal / acceleration frequency characteristic at the assumed excitation current / voltage obtained by changing the excitation current / voltage from the reference excitation current / voltage, and calculates it as the assumed characteristic. Assuming that the reference excitation current is 20 A, for example, 19 A, 18 A,..., An assumed excitation current is determined in increments of 1 A, and each assumed excitation current is assumed based on the reference characteristics. Is calculated (see H1 and H2 in FIG. 5A).

  The assumed drive current / voltage calculating means 36 is configured to realize the required acceleration characteristic (see FIG. 5B) based on the assumed characteristic when the assumed excitation current / voltage is applied to the exciting coil 4. Whether the drive current / voltage should be given is calculated for each assumed excitation current / voltage. FIG. 5C shows the frequency characteristics of the assumed drive current calculated in this way. The assumed drive current I0 corresponds to the reference characteristic H0, the assumed drive current I1 corresponds to the reference characteristic H1, and the assumed drive current I2 corresponds to the reference characteristic H2.

  The assumed temperature calculation means 38 is based on the assumed cooling capacity of the cooling blower 16 serving as a cooler, and the excitation coil 10 when the vibration generator 1 is operated with each assumed excitation current / voltage and each assumed drive current / voltage. The temperature of the drive coil 4 is estimated. The assumed temperature calculation means 38 performs the above temperature estimation while changing the assumed cooling capacity.

  As shown in FIG. 6A, the operating condition selection means 40 creates a table of assumed temperatures when the assumed excitation current / voltage and the assumed cooling capacity are changed. Such a table is created for each of the exciting coil 10 and the driving coil 4. Further, as shown in FIG. 6B, a table of total power consumption in the exciting coil 4, the driving coil 10, and the cooling blower 16 when the assumed exciting current / voltage and the assumed cooling capacity are changed is created. Then, a combination that satisfies the temperature condition and has the best driving-related value is selected. For example, if attention is given to quietness, a combination of an assumed excitation current / voltage and an assumed cooling capacity that minimizes the blower rotation speed among those satisfying the temperature condition is selected. If attention is paid to the power consumption, the combination of the assumed excitation current / voltage and the assumed cooling capacity with the smallest power consumption is selected among those satisfying the temperature condition.

  The operation condition output means 42 controls the variable excitation power supply 26 and the variable blower power supply 28 based on the operation condition selected in this way, and the magnitude of the excitation current (voltage) indicated in the operation condition, the cooling blower 16. Set the number of revolutions. Under such driving conditions, the vibration controller 22 compares the target acceleration with the response acceleration and automatically adjusts the drive signal applied to the amplifier 24 so that the target acceleration is realized. The vibration generator 1 is operated so that the test requirement is satisfied by the output. Thereby, it is possible to perform a vibration test so as to achieve the required acceleration characteristics while achieving the driving-related values of interest such as power consumption and quietness.

2. Hardware Configuration FIG. 7 shows a hardware configuration when the operating condition determination device 100 is realized using a CPU. A display 50, a memory 52, a hard disk 56, a keyboard / mouse 58, and a CD-ROM drive 59 are connected to the CPU 54. Further, the CPU 54 can exchange signals with the vibration controller 22 via an I / O port (not shown). Further, the variable excitation power source 26 and the variable blower power source 28 can be controlled via the I / O port.

  An operating system (OS) 60 and an operating condition determination program 62 are recorded on the hard disk 56. The OS 60 and the operating condition determination program 62 are those recorded on the CD-ROM 64 and installed on the hard disk 56 via the CD-ROM drive 59. The operating condition determination program 62 achieves its function in cooperation with the OS 60. Note that the function may be exhibited only by the operating condition determination program 62 without using the OS 60.

3. Processing of Operation Condition Determination Program FIG. 8 shows a flowchart of the operation condition determination program 62. First, in step S <b> 1, the CPU 54 acquires the required acceleration PSD set by the operator for the vibration controller 22 from the vibration controller 22. The required acceleration PSD, which is the required acceleration, represents a required acceleration spectrum at each frequency, and is shown as shown in FIG. 5B, for example. The unit of the vertical axis is (m / s ² ) ² / Hz. m is a unit of length (meters), s is a unit of time (seconds), and Hz is a unit of frequency (hertz).

Next, the CPU 54 inquires the vibration controller 22 to transmit basic characteristics. In response to this, the vibration controller 22 supplies the reference excitation current / voltage to the excitation coil 10 with the specimen 20 to be measured fixed to the movable part 6 of the vibration generator 1. The drive current / voltage / acceleration frequency characteristics Hi (f) and He (f) indicating the relationship between the frequency and the acceleration are obtained as reference characteristics. The CPU 54 receives this reference characteristic from the vibration controller 22 and records it on the hard disk 56 (step S2). The reference characteristic is shown as H0 in FIG. 5A, for example. The unit of the vertical axis of H _i (f) is (m / s ² ) / A. A is a unit (ampere) of (drive) current. Unit of the vertical axis of H _e (f) is a ^{(m / s 2) / V} . V is a unit (volt) of (drive) voltage.

  Next, the CPU 54 calculates an assumed characteristic based on the above-mentioned reference characteristic for the assumed excitation current obtained by changing the excitation current by a predetermined value from the reference excitation current (step S4). The calculation of the assumed characteristics is performed as follows.

Based on the H _i (f) and H _e (f), the impedance of the drive coils Z (f), is calculated using the following relationship:

The magnetic flux density B ′ when the excitation current is changed from I _f to I _f ′ is obtained by the following formula: (The following formula is calculated in advance by experiment)

  In the above formula, I is an exciting current (ampere), and B is a magnetic flux density (Tesla).

H ' _i (f) under the assumed excitation current condition is calculated by the above two formulas using the basic characteristic H _i (f):

In this way, it is possible to calculate the drive current / acceleration frequency characteristics (also referred to as constant current characteristics) H ′ _i (f) under the assumed excitation current. Since the force generated by the drive current is proportional to B, Hi is proportional to B if the other conditions are the same.

Next, the drive coil impedance Z ′ (f) under the magnetic flux density B ′ at the assumed excitation current is calculated:
The motional impedance Z _m of the movable part (vibrator and specimen) of mass m that moves in the static magnetic field B by the drive current flowing through the drive coil of effective length l is

It can be expressed as. Here, m is the dynamic mass of the movable part, and is an amount represented by a complex number. When the DC resistance of the drive coil 10 is R and the inductance is L, the total impedance Z of this movable part is expressed as follows:

This by solving for m, the dynamic mass of the movable portion in the operating state of the measurement of the H _e (f) and H _i (f) can be calculated:

  In order to obtain the impedance Z ′ under the new B ′, the following equation using B ′ instead of B in the equation (A-5) can be calculated using the value of m obtained above. :

Using the relationship of equation (A-1), drive voltage / acceleration frequency characteristics (also called constant voltage characteristics) H ' _e (f) under the assumed excitation current are calculated by the following equation:

  As described above, the CPU 54 calculates the assumed characteristics (drive current / acceleration frequency characteristics and drive voltage / acceleration frequency characteristics) in the assumed excitation current based on the reference characteristics. For example, the assumed characteristics are expressed as H1 and H2 in FIG. 5A.

Next, the CPU 54 calculates a frequency characteristic of a necessary assumed driving current and an assumed driving voltage based on the required acceleration PSD and the assumed characteristic (step S5). For example, it is expressed as I1 or I2 in FIG. 5C. In the case of random vibration, the vertical axis is A ² / Hz for the assumed drive current and V ² / Hz for the assumed drive voltage. The CPU 54 performs integration over the frequency for each of the assumed drive current and the assumed drive voltage to obtain an effective value.

  Subsequently, the CPU 54 determines whether or not the calculated effective values of the assumed drive current and the assumed drive voltage are within the limits of the amplifier 24. When either one or both exceeds the limit, the process proceeds to the next examination of the assumed excitation current.

  If the effective values of the assumed drive current and the assumed drive voltage are both within the limits of the amplifier 24, the CPU 54 calculates power consumption and temperature when the rotation speed of the cooling blower 16 is varied. The power consumption and temperature are calculated for each of the assumed rotational speeds in which the rotational speed of the cooling blower 16 is changed for each predetermined frequency from the reference rotational speed.

The CPU 54 first considers the reference rotational speed as the target rotational speed V. The power consumption P _d in the drive coil 4, the power consumption P _f in the excitation coil 10, and the power consumption P _b in the cooling blower 16 at the assumed excitation current I _f and the rotation speed V can be calculated by the following equations. .

P _d = R _d0 [1 + c _d (T _in -T _d0 )] I _d ² / (1-R _d0 c _d I _d ² k _d V ^αd )

P _f = R _f0 [1 + c _f (T _in -T _fo )] I _f ² / (1-R _f0 c _f I _f ² k _f V ^αf )

P _b = P _b0 (V / V ₀ ) ³

CPU54 calculates the total power consumption P _t P _d, P _f, as the sum of P _b.

The above equation is derived as follows. When joule heat (power consumption) per unit time generated in the drive coil 10 is written as P _d [W] and drive current is written as I _d [A],
P _d = R _d I _d ² (B-1)
Here R _d a direct current resistance at the temperature T _d [K] of the driving coil, the value at the reference temperature T _d0 If you write R _d0, the temperature coefficient of the electrical resistance of the drive coil wrote c _d, following Given by the formula;
R _d = R _d0 [1 + c _d (T _d -T _d0 )] (B-2)
On the other hand, the temperature T _d of the driving coil will of determined are complicatedly influenced on various factors, but the most basic, will be proportional to the power consumption P _d in the drive coil. Further, it is considered that the rotation speed V of the blower generating the cooling air will be inversely proportional. So, using the experimentally determined parameters (k _d , α _d ), suppose that:
T _d -T _in = k _d P _d / V ^αd (B-3)
Here, T _in is the temperature at the air intake of the cooling air.

From the above three equations, we obtain the following equation that gives the power consumption P _d as a function of the current I _d and the blower speed V:
P _d = R _d0 [1 + c _d (T _in -T _d0 )] I _d ² / (1-R _d0 c _d I _d ² k _d V ^αd ) (B-4)
In exactly the same way, the following equation corresponding to the above is obtained for the exciting coil:
P _f = R _f I _f ² (B-5)
R _f = R _f0 [1 + c _f (T _f -T _f0 )] (B-6)
T _f -T _in = k _f P / V ^αf (B-7)
P _f = R _f0 [1 + c _f (T _in -T _f0 )] I _f ² / (1-R _f0 c _f I _f ² k _f V ^αf ) (B-8)
If the power consumption of the blower is written as P _b , the rated power consumption of the blower is V ₀ [Hz], the rated power consumption is P _b0 , and the power consumption when the rotational speed is reduced to V is roughly expressed as follows: Is:
P _b = P _b0 (V / V ₀ ) ³ (B-9)
Writing power consumption required to operate the vibration generator in certain conditions as P _t, P _t is expressed as a sum of the above power consumption:
P _t = P _d + P _f + P _b (B-10)
In the above, the formula ignoring the interaction between the drive coil and the excitation coil is listed, but more generally, it is necessary to account for this, in which case the formulas (B-3) and ( The relationship of B-7) can be written as:
T _d = T ₁ -T _in = k _dd P _d / V ^αdd + k _df P _f / V ^αdf
T _f = T ₂ -T _in = k _fd P _d / V ^αfd + k _ff P _f / V ^αff (B-3A)
That is, T _d T _f is determined as a solution of the simultaneous equations (B-3A), but here, for simplification of explanation, simplified equations (B-3) and (B-7) are used. An explanation will be given based on this.

CPU54 is the total power consumption P _t calculated, the hard disk 56 the table (Fig. 6B), and records the applicable portion that is determined by assuming the excitation current and the cooling blower speed.

  Next, the CPU 54 calculates the temperatures of the excitation coil 4 and the drive coil 10 at the assumed excitation current and the cooling blower rotation speed according to the following equations (step S9).

T _f = k _f P _f / V ^αf + T _in
T _d = k _d P _d / V ^αd + T _in
These equations are calculated from the aforementioned equations (B-3) and (B-7).

Subsequently, the CPU 54 determines whether or not the calculated excitation coil temperature T _f and drive coil temperature T _d are within the limit temperatures (step S10). In either case, if the temperature exceeds the limit temperature, the next blower rotation speed is considered. At this time, the CPU 54 determines the calculated total power consumption P _t , excitation coil temperature T _f, and drive coil temperature T _d depending on the assumed excitation current and cooling blower rotation speed in the table of the hard disk 56 (FIGS. 6A and 6B). In addition to recording in the part, a mark (NG or the like) indicating that driving is impossible is also recorded.

If both are within the limit temperature, the CPU 54 calculates the calculated total power consumption P _t , the excitation coil temperature T _f, and the drive coil temperature T _d from the assumed excitation current and cooling in the table (FIGS. 6A and 6B) of the hard disk 56. Recording is made in a corresponding portion determined by the blower rotation speed (step S11).

  Next, the CPU 54 determines whether or not the blower rotational speed to be examined remains (step S12). If all the assumed blower rotation speeds have not been examined, step S7 and subsequent steps are executed again for the next assumed blower rotation speed. As a result, the columns of the tables in FIGS. 6A and 6B are filled vertically.

  When the examination of all the assumed blower rotation speeds is completed, Step S3 and subsequent steps are executed again for the next assumed exciting current. By repeating this, all the tables in FIGS. 6A and 6B are filled.

  When the examination of all combinations of assumed excitation currents and blower rotation speeds is completed, the CPU 54 searches for an optimum condition with reference to this table. For example, in a mode that focuses on energy saving, (NG) is not described in the table of FIG. 6A (that satisfies the temperature condition), and the one with the lowest power consumption by the table of FIG. The operating condition is selected (step S13). The CPU 54 displays the selected operating condition on the display 50 as shown in FIG. 9A. By calculating and displaying a comparison of the power consumption with the case where the reference excitation current is used, the operator can easily understand the effect.

  Subsequently, when the operator gives an instruction to operate under this operating condition from the keyboard / mouse 58, the CPU 54 controls the variable excitation power source 26 so as to obtain the selected assumed excitation current so that the selected assumed blower rotation speed is obtained. The variable blower power supply 28 is controlled. In this state, the test is executed.

  For example, in the mode that focuses on low noise, (NG) is not described in the table of FIG. 6A (the temperature condition is satisfied), and the blower rotation speed is the smallest in the table of FIG. 6B. Is selected as the operating condition (step S15). The CPU 54 displays the selected operating condition on the display 50 as shown in FIG. 9B. By calculating and displaying a comparison of the blower with the case where the reference excitation current is used, the operator can easily understand the effect.

  Subsequently, when the operator gives an instruction to operate under this operating condition from the keyboard / mouse 58, the CPU 54 controls the variable excitation power source 26 so as to obtain the selected assumed excitation current so that the selected assumed blower rotation speed is obtained. The variable blower power supply 28 is controlled. In this state, the test is executed.

  The mode switching can be specified by the operator using the keyboard / mouse 58. Further, both the calculation in the energy saving mode and the calculation in the low noise mode may be displayed on the display so that the operator can select them.

4). Other Embodiments In the above embodiment, the vibration controller 22 calculates the reference characteristics. However, the operating condition determination device 100 itself may calculate the reference characteristics.

  In the above embodiment, the CPU 54 selects the optimal condition. However, all that satisfy a predetermined standard (for example, the power consumption is equal to or lower than the predetermined power and the blower rotational speed is equal to or lower than the predetermined rotational speed) may be selected and displayed so that the operator can select them. Moreover, you may make it select an operating condition in consideration of both power consumption and a blower rotation speed. In this case, both the power consumption and the blower rotation speed are standardized, weighted to each, and the one with the highest (lowest) score may be selected.

  In the above embodiment, selection is made from those in which the predicted temperature in FIG. 6A is within the limit temperature. However, in consideration of the prediction error, the selection may be made from those in which the predicted temperature is within a predetermined ratio (for example, within 90%) of the limit temperature.

  In the above embodiment, appropriate operating conditions are selected by paying attention to power consumption and blower rotation speed. However, one of the conditions may be whether the drive signal given from the vibration controller 22 to the amplifier 24 is within a range where the distortion is amplified by the amplifier 24 with the smallest distortion. In this case, the magnitude of the drive signal from the vibration controller 22 may be seen, but the judgment can also be made by looking at the magnitude of the drive signal output from the amplifier 24.

  In the above embodiment, the cooling noise (noise generated by the operation of the cooling device) is estimated by the cooling capacity, that is, the blower rotation speed, but the cooling noise may be directly measured.

The above modification can also be applied to the second embodiment.

two. Second Embodiment 1. Overall Configuration FIG. 3 shows a second embodiment of a vibration test system using the operating condition determining apparatus 100 according to the present invention. The operating condition determining apparatus 100 determines a preferable operating condition that matches the purpose, and controls the variable excitation power source 26 and the variable blower power source 28 based on this. This embodiment is suitable for a test performed by changing the frequency with time, but can also be applied to a random vibration test in which a test is performed by applying vibration having a desired frequency spectrum to the specimen.

  A block diagram of the operating condition determining apparatus 100 according to this embodiment is shown in FIG. The reference characteristic acquisition means 52 fixes the specimen 20 to be measured to the movable part 6 of the vibration generator 1 and applies the reference excitation current / voltage to the excitation coil 10. A drive current / voltage / acceleration frequency characteristic indicating the relationship is acquired as a reference characteristic (see H0 in FIG. 5A).

  If the specimen 20 is already known and recorded with reference characteristics, it is obtained by reading it. If the specimen 20 has no known reference characteristics, the drive current / voltage / acceleration frequency characteristics are calculated by actual measurement in the same manner as in the first embodiment.

  The first assumed characteristic calculation means 56 predicts the drive current / voltage / acceleration frequency characteristic at the assumed excitation current / voltage obtained by changing the excitation current / voltage from the reference excitation current / voltage, and calculates it as the assumed characteristic. Assuming that the reference excitation current is 20 A, for example, 19 A, 18 A,..., An assumed excitation current is determined in increments of 1 A, and each assumed excitation current is assumed based on the reference characteristics. Is calculated (see H1 and H2 in FIG. 5A).

  The attention excitation frequency calculation means 54 calculates the drive current / voltage necessary for realizing the required acceleration characteristic for each excitation frequency based on the reference characteristic, and requires the largest drive current / voltage. Find a noteworthy excitation frequency.

  The first assumed drive current / voltage calculation means 58 is requested at the target excitation frequency when it is assumed that the first excitation drive current / voltage is fixed at the target excitation frequency under the assumed characteristics at each assumed excitation current / voltage. The first assumed drive current / voltage necessary for obtaining the acceleration characteristics to be obtained is calculated. As a result, the assumed drive current / voltage is calculated for each assumed excitation current / voltage when the vibration is continuously performed at the frequency of the strictest condition among the sweep frequencies.

  The assumed temperature calculation means 60 is based on the assumed cooling capacity of the cooling blower 16 that is a cooler, and the excitation coil 10 when the vibration generator 1 is operated by each assumed excitation current / voltage and each assumed drive current / voltage. The temperature of the drive coil 4 is estimated. The assumed temperature calculation means 60 performs the above temperature estimation while changing the assumed cooling capacity.

  The excitation operation condition selection means 62 creates a table of assumed temperatures when the assumed excitation current / voltage and the assumed cooling capacity are changed. Such a table is created for each of the exciting coil 10 and the driving coil 4. Further, a table of total power consumption in the exciting coil 4, the driving coil 10, and the cooling blower 16 when the assumed exciting current / voltage and the assumed cooling capacity are changed is created. Then, a combination that satisfies the temperature condition and has the best driving-related value is selected. For example, if attention is given to quietness, a combination of an assumed excitation current / voltage and an assumed cooling capacity that minimizes the blower rotation speed among those satisfying the temperature condition is selected. If attention is paid to the power consumption, the combination of the assumed excitation current / voltage and the assumed cooling capacity with the smallest power consumption is selected among those satisfying the temperature condition. The excitation operation condition selection means 62 determines the assumed excitation current / voltage in the combination selected in this way as the excitation operation condition.

  When the second assumed drive current / voltage calculating means 64 is made to vibrate by changing the excitation frequency with time according to the request based on the drive current / voltage / acceleration frequency characteristics in the determined assumed excitation current / voltage, A temporal change in the second assumed drive current / voltage to satisfy the required acceleration is calculated.

  The second assumed temperature calculation means 66 assumes a plurality of cooling capacities of the cooler, and assumes the excitation coil assumed temperature when the assumed excitation current / voltage is applied to the excitation coil under the respective cooling capacities. 2 Calculate the temporal change in the assumed temperature of the drive coil when the assumed drive current / voltage is applied to the drive coil.

  The cooling operation condition selection means 68, when the vibration generator is operated at each assumed cooling capacity, the assumed temperatures of the excitation coil and the drive coil do not exceed the predetermined temperature, and the operation related value to be noticed is predetermined. The assumed cooling capacity that satisfies the above condition is selected as the cooling operation condition.

  The operation condition output means 70 outputs the excitation operation condition selected by the excitation operation condition selection means 62 and the cooling operation condition selected by the cooling operation condition selection means 68 as operation conditions.

2. Hardware Configuration The hardware configuration is the same as that of the first embodiment shown in FIG. However, in this embodiment, the operating condition determination program 62 recorded in the hard disk 56 is different.

3. Processing of Operation Condition Determination Program FIG. 11 shows a flowchart of the operation condition determination program 62. Here, as shown in FIG. 12, setting of operating conditions when performing a test (sweep test) in which the excitation frequency changes with time will be described. As can be seen from FIG. 12, in this test, the vibration frequency is gradually increased from the start frequency, and when a predetermined frequency is reached, the operation of gradually decreasing the frequency and returning to the start frequency is performed (FIG. 12A). ) Or immediately return to the start frequency and repeat the same sweep operation (FIG. 12B).

First, in step S <b> 51, the CPU 54 acquires required acceleration level data set by the operator for the vibration controller 22 from the vibration controller 22. For example, as shown in FIG. 13, required acceleration level data is given as the relationship between vibration frequency and acceleration. Unit of the vertical axis is m / s ^2. m is a unit of length (millimeter), s is a unit of time (second), and Hz is a unit of frequency (hertz).

Next, the CPU 54 acquires basic characteristics under the basic excitation current from the vibration controller 22 (step S52). The basic characteristic acquisition process is the same as in the first embodiment. The CPU 54 records the basic characteristics received from the vibration controller 22 on the hard disk 56. The reference characteristic is shown as H0 in FIG. 5A, for example. The unit of the vertical axis of H _i (f) is (m / s ² ) / A. A is a drive current (ampere). Unit of the vertical axis of H _e (f) is a ^{(m / s 2) / V} . V is a drive voltage (volt).

  Next, the CPU 54 calculates a drive current necessary for achieving the required acceleration level for each vibration frequency based on the basic characteristics under the basic excitation current. For example, the frequency characteristic of the drive current as shown in FIG. 14 is obtained. Subsequently, the CPU 54 finds the vibration frequency f0 that requires the largest drive current based on the obtained frequency characteristic of the drive current (step S53).

  In this way, the vibration frequency f0, which is the most severe condition in the sweep test (the driving current is large and the possibility of heat generation is high) is determined.

  Next, the CPU 54 assumes that the vibration is constantly applied at the vibration frequency f0, and executes the first optimization process (step S54). Details of the primary optimization processing are shown in FIG. This first optimization process is basically the same as step S3 and subsequent steps in FIG. 8 in the first embodiment. However, in the first embodiment, the assumed characteristic is calculated as the frequency characteristic based on the assumed excitation current in step S4. However, in step S82 of the present embodiment, it is sufficient to calculate the assumed characteristic of only the vibration frequency f0. is there. In the first embodiment, the RMS value is calculated from the power spectral density of the required drive current in step S5. However, in step S83 in the present embodiment, only the RMS value of the required drive current at the vibration frequency f0 is calculated. do it. Other processes are the same as those in step S3 and subsequent steps in the first embodiment.

By the first optimization process, for example, when the operation-related value of interest is power consumption, the operation condition with the least power consumption can be obtained while satisfying the temperature condition. The CPU 54 records the assumed excitation current _If 1 included in this operation condition as the excitation operation condition (step S91).

If the driving-related value of interest is the noise, in the same manner, assuming the exciting current I _f 1 as the most noise is reduced while satisfying the temperature condition is selected as the energized operating conditions.

As described above, it is possible to obtain the optimum exciting current _If 1 when it is assumed that the vibration is constantly oscillated at the vibration frequency f0 without performing the sweep.

Next, the CPU 54 performs secondary optimization (step S55 and subsequent steps in FIG. 11). That is, when it is assumed that the sweep test is performed under the assumed excitation current I _f 1 selected as the excitation operation condition, a condition is found in which the relevant operation-related value is optimized while satisfying the temperature condition.

First, the assumed characteristics of the vibrator under the assumed excitation current _If 1 are calculated based on the basic characteristics (step S55). This can be obtained by the same method as step S3 of the first embodiment. Next, the CPU 54 calculates the frequency characteristic of the assumed drive current based on the required acceleration level data and the assumed characteristic. Since this is a sweep test, this frequency characteristic corresponds to a temporal change. Then, the CPU 54 calculates the RMS value based on the temporal change of the assumed drive current I _d (t) (step S56).

Subsequently, the CPU 54 changes the assumed blower rotation speed and examines whether or not the temperature condition is satisfied in each case (steps S57 to S60). First, according to the temperature calculation model used in the first embodiment (see step S9 in FIG. 8) at the blower rotation speed under the above-described operating conditions, the assumed excitation current I _f 1 is assumed and the assumed drive current I _d ( t) is calculated when it is applied as a time series, the temperature estimated value T _f of the exciting coil (t) and the driving coil temperature estimate T _d a (t) (step S58). Estimated temperature T _f of the exciting coil (t) and the driving coil temperature estimate T _d (t) is obtained as time-series data.

The CPU 54 selects the highest temperature Tf from the temperature estimation value T _f (t) of the exciting coil in time series. Similarly, the highest temperature T _d is selected from the temperature estimation values T _d (t) of the drive coils in time series (step S59).

Next, it is determined whether or not the maximum temperature T _f T _d selected in this way is within the limit temperature (step S60). If both are within the limit temperature, the blower rotational speed is reduced and step S57 and subsequent steps are executed.

  If either one or both exceeds the limit temperature, the blower rotational speed is increased and step S57 and subsequent steps are executed.

  The above process is repeated, and the one with the lowest blower speed within the limit temperature is selected. In this way, the optimum blower rotation speed is obtained as the cooling operation condition.

The CPU 54 outputs the excitation current under the excitation operation condition calculated at step S54 and the blower rotation speed under the cooling operation condition calculated at step S61 as the operation conditions. Further, as in the first embodiment, the power consumption at this time is output.

three. Other Embodiments In the above embodiment, the driving conditions are selected by focusing on one driving-related value such as power saving and quietness. However, a driving condition may be selected by combining a plurality of driving related values. For example, the power consumption ratio (decrease%) from the power in the basic excitation current / basic blower rotation and the sum of the rotation speed reduction ratio (decrease%) from the basic blower rotation may be selected. . Further, each driving-related value may be selected with a weight.

  Although the vibration test apparatus using air cooling has been described in the above embodiment, the vibration test apparatus using water cooling can also be applied.

  Further, when the cooling capacity is sufficient as compared with the heat generation amount, a condition that can achieve a desired operation-related value (power consumption and blower rotation speed) may be selected without considering the temperature condition.

  In each of the above embodiments, the case where the exciting coil is present and the exciting current can be changed has been described. However, the present invention can also be applied to a vibration tester that is excited by a permanent magnet. In this case, the optimum value of the combination of drive current and cooling capacity is obtained.

  During actual operation according to the operation conditions calculated by the above embodiments, the temperature of the drive coil and the excitation coil is measured, and the difference between the measured temperature and the estimated temperature (the value calculated when determining the operation condition) is obtained. When this difference exceeds a predetermined value, the operating condition may be changed.

  At this time, the actually measured temperature of the drive coil may be measured by providing a sensor or the like, but may be calculated from the actually measured drive current and the actually measured drive voltage. The same applies to the exciting coil.

  In each of the above embodiments, the temperature of the excitation / drive coil is set as a constraint condition for selecting the operation condition. However, in addition (or alone), the current value or voltage value of the assumed excitation current / voltage does not exceed the limit value, and / or the current value or voltage value of the assumed drive current / voltage is the limit value. It is good also as a constraint condition not exceeding.

  In each of the above embodiments, the optimum operating condition is found after changing the exciting current. Such a concept can also be applied to a shock test (a test that gives a large acceleration instantaneously). In order to obtain a large acceleration, it is advantageous to increase the excitation current. However, if the speed required by the motion represented by the target acceleration waveform is very high, a large magnetic flux density is generated in the magnetic circuit gap by a large excitation current, so that the back electromotive force generated in the coil moving in the magnetic circuit gap is generated. A large driving voltage is required to increase the power and to overcome the driving current, but this may be insufficient due to the limitation of the amplifier rating. In such a case, on the contrary, an excitation current smaller than the standard value is set within the range allowed by the acceleration request to solve the shortage of the drive voltage of the amplifier. May be possible. That is, in the example described above, the optimization process has been described to minimize power consumption and generated noise. However, as in the example described here, excitation is performed according to the speed requirement required by the excitation state to be realized. It is also possible to optimize the current.

  In each of the above embodiments, the operating conditions are determined by paying attention to the excitation current and the excitation voltage, but the same determination can be made by paying attention to the excitation voltage and the drive voltage.

  In each of the above embodiments, each function of FIG. 4 and FIG. 10 is realized using a CPU, but part or all of the functions may be realized only by a hardware circuit.

It is a figure which shows the structure of an electrodynamic vibration generator (air cooling type). It is a figure which shows the structure of the conventional vibration test system. It is a figure which shows the structure of the vibration test system by one Embodiment of this invention. It is a functional block diagram of the operating condition determination device by a first embodiment. FIG. 5A is a graph showing basic characteristics and assumed characteristics. FIG. 5B is a graph showing the required acceleration. FIG. 5C is a graph showing the required drive current. It is a table for determining an operating condition. It is a hardware configuration of an operating condition determination apparatus. 7 is a flowchart of an operating condition determination program 62. It is a display example of a screen showing the effect of operating condition setting. It is a functional block diagram of the operating condition determination apparatus by 2nd embodiment. 7 is a flowchart of an operating condition determination program 62. It is a graph which shows the relationship between the elapsed time and the excitation frequency in a sweep test. It is a graph which shows a request | requirement acceleration level. It is a graph which shows the drive current for implement | achieving required acceleration. It is a flowchart of a primary optimization process.

Explanation of symbols

32 ... Reference characteristic acquisition means 34 ... Assumed characteristic calculation means 36 ... Assumed drive value calculation means 38 ... Assumed temperature calculation means 40 ... Operating condition selection means 42 ... Operating condition output means

Claims (18)

An excitation coil that generates a static magnetic field, a drive coil that is provided in the static magnetic field generated by the excitation coil and is driven by electromagnetic force, a movable part that transmits the drive force of the drive coil to a specimen, and An operating condition determining device for determining operating conditions of a vibration generator having a cooling device for cooling an exciting coil and a driving coil,
Acquire the reference characteristics that acquire the drive current / voltage / acceleration frequency characteristics that indicate the relationship between the drive current / voltage frequency and acceleration when the specimen is mounted on the movable part and driven by the reference excitation current / voltage. Means,
Assuming that when the excitation current / voltage value is changed from the reference excitation current / voltage, the drive current / voltage / acceleration frequency characteristics at each assumed excitation current / voltage are calculated as the assumed characteristics based on the reference characteristics. Characteristic calculation means;
An assumed drive current / voltage calculating means for calculating a frequency characteristic of an assumed drive current / voltage necessary for obtaining a required acceleration characteristic based on each assumed characteristic based on the assumed characteristic;
When the cooling capacity of the cooler is operated with the assumed cooling capacity, the assumed temperature of the exciting coil and the assumed driving when the assumed exciting current / voltage is applied to the exciting coil under the respective assumed cooling ability. An assumed temperature calculation means for calculating an assumed temperature of the drive coil when current / voltage is applied to the drive coil;
Of the multiple combinations of the assumed excitation current / voltage and the assumed cooling capacity, when the vibration generator is operated with this combination, the expected temperature of the excitation coil and the drive coil does not exceed the predetermined temperature, and attention is paid Driving condition selection means for selecting a driving condition as a driving condition such that the driving-related value satisfies a predetermined condition;
An operating condition detecting means for outputting the selected operating condition;
An operating condition determination device comprising: In the operating condition determination device according to claim 1,
The operating condition selection means is configured to assume an assumed excitation current at an assumed excitation current / voltage when the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity. Operation condition determination characterized by selecting a combination satisfying the condition that the total power of the power, the assumed drive power at the assumed drive current / voltage, and the assumed cooling power for obtaining the assumed cooling capacity is minimized. apparatus. In the operating condition determination device according to claim 1,
The operating condition selection means has a condition that, among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity, the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature and the cooling noise is minimized. An operating condition determination device that selects a satisfying combination as an operating condition. In the operating condition determination apparatus in any one of Claims 1-3,
The reference characteristic acquisition means acquires at least two reference characteristics for at least two reference excitation currents / voltages having different voltages or currents,
The operating condition determination device, wherein the assumed characteristic calculation means calculates an assumed characteristic based on the two or more reference characteristics.   An operation control apparatus comprising the operation condition determination device according to any one of claims 1 to 4 and controlling the operation of the vibration generator based on the operation condition determined by the operation condition determination device. An excitation coil that generates a static magnetic field, a drive coil that is provided in the static magnetic field generated by the excitation coil and is driven by electromagnetic force, a movable part that transmits the drive force of the drive coil to a specimen, and An operating condition determining program for realizing by a computer an operating condition determining device for determining an operating condition of a vibration generator having a cooling device for cooling an exciting coil and a driving coil,
Acquire the reference characteristics that acquire the drive current / voltage / acceleration frequency characteristics that indicate the relationship between the drive current / voltage frequency and acceleration when the specimen is mounted on the movable part and driven by the reference excitation current / voltage. Means,
Assuming that when the excitation current / voltage value is changed from the reference excitation current / voltage, the drive current / voltage / acceleration frequency characteristics at each assumed excitation current / voltage are calculated as the assumed characteristics based on the reference characteristics. Characteristic calculation means;
An assumed drive current / voltage calculating means for calculating a frequency characteristic of an assumed drive current / voltage necessary for obtaining a required acceleration characteristic based on each assumed characteristic based on the assumed characteristic;
When the cooling capacity of the cooler is operated with the assumed cooling capacity, the assumed temperature of the exciting coil and the assumed driving when the assumed exciting current / voltage is applied to the exciting coil under the respective assumed cooling ability. An assumed temperature calculation means for calculating an assumed temperature of the drive coil when current / voltage is applied to the drive coil;
Of the multiple combinations of the assumed excitation current / voltage and the assumed cooling capacity, when the vibration generator is operated with this combination, the expected temperature of the excitation coil and the drive coil does not exceed the predetermined temperature, and attention is paid Driving condition selection means for selecting a driving condition as a driving condition such that the driving-related value satisfies a predetermined condition;
An operating condition detecting means for outputting the selected operating condition;
Operating condition determination program for realizing the above with a computer. In the operating condition determination program according to claim 6,
The operating condition selection means is configured to assume an assumed excitation current at an assumed excitation current / voltage when the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity. Operation condition determination characterized by selecting a combination satisfying the condition that the total power of the power, the assumed drive power at the assumed drive current / voltage, and the assumed cooling power for obtaining the assumed cooling capacity is minimized. program. In the operating condition determination program according to claim 7,
The operating condition selection means has a condition that, among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity, the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature and the cooling noise is minimized. An operating condition determination program that selects a satisfying combination as an operating condition. In the operating condition determination program according to any one of claims 6 to 8,
The reference characteristic acquisition means acquires at least two reference characteristics for at least two reference excitation currents / voltages having different voltages or currents,
The operating condition determination program characterized in that the assumed characteristic calculation means calculates an assumed characteristic based on the two or more reference characteristics. An excitation coil that generates a static magnetic field, a drive coil that is provided in the static magnetic field generated by the excitation coil and is driven by electromagnetic force, a movable part that transmits the drive force of the drive coil to a specimen, and An operating condition determining device for determining operating conditions of a vibration generator having a cooling device for cooling an exciting coil and a driving coil,
The vibration generator is used to change the excitation frequency over time to give vibration to the specimen.
Acquire the reference characteristics that acquire the drive current / voltage / acceleration frequency characteristics that indicate the relationship between the drive current / voltage frequency and acceleration when the specimen is mounted on the movable part and driven by the reference excitation current / voltage. Means,
Based on the reference characteristics, the drive current / voltage necessary for realizing the required acceleration characteristics is calculated for each excitation frequency, and the exciting excitation that finds the excitation frequency that requires the largest drive current / voltage is found. A frequency calculation means;
Assuming that when the excitation current / voltage value is changed from the reference excitation current / voltage, the drive current / voltage / acceleration frequency characteristics at each assumed excitation current / voltage are calculated as the assumed characteristics based on the reference characteristics. Characteristic calculation means;
Necessary to obtain the acceleration characteristics required at the target excitation frequency when it is assumed that the target excitation frequency is fixed and excited based on the assumed characteristics. First assumed drive current / voltage calculating means for calculating a first assumed drive current / voltage;
When the cooling capacity of the cooler is operated with the assumed cooling capacity, the assumed temperature of the exciting coil and the assumed driving when the assumed exciting current / voltage is applied to the exciting coil under the respective assumed cooling ability. First assumed temperature calculation means for calculating an assumed temperature of the drive coil when current / voltage is applied to the drive coil;
Of the multiple combinations of the assumed excitation current / voltage and the assumed cooling capacity, when the vibration generator is operated with this combination, the expected temperature of the excitation coil and the drive coil does not exceed the predetermined temperature, and attention is paid Excitation operation condition selection means for selecting an assumed excitation current / voltage as an excitation operation condition in a combination in which the operation-related value satisfies a predetermined condition;
Based on the drive current / voltage / acceleration frequency characteristics with the assumed excitation current / voltage under the excitation operation conditions, the second assumed drive current / A second assumed driving current / voltage calculating means for calculating a temporal change in voltage;
When the cooling capacity of the cooler is operated at the assumed cooling capacity, the expected temperature of the exciting coil when the expected exciting current / voltage is applied to the exciting coil under the above-mentioned exciting operating conditions under each assumed cooling capacity. And a second assumed temperature calculating means for calculating a temporal change in the assumed temperature of the drive coil when an assumed drive current / voltage is applied to the drive coil;
Assuming that the vibration generator is operated with each assumed cooling capacity, the assumed cooling of the exciting coil and the drive coil does not exceed the predetermined temperature, and the expected operation-related value satisfies the predetermined condition A cooling operation condition selection means for selecting the capacity as the cooling operation condition;
Operation condition output means for outputting the excitation operation condition and the cooling operation condition as operation conditions;
An operating condition determination device comprising: In the operating condition determination device according to claim 10,
The excitation operation condition selection unit is configured to assume that the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity, and the assumed excitation current / voltage is assumed. An operating condition characterized by selecting a combination satisfying the condition that the total power of the exciting power, the assumed driving power at the assumed driving current / voltage, and the assumed cooling power for obtaining the assumed cooling capacity is minimized. Decision device. In the operating condition determination device according to claim 10,
The operating condition selection means has a condition that, among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity, the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature and the cooling noise is minimized. An operating condition determination device that selects a satisfying combination as an operating condition. In the operating condition determination device according to any one of claims 10 to 12,
The reference characteristic acquisition means acquires at least two reference characteristics for at least two reference excitation currents / voltages having different voltages or currents,
The operating condition determination device, wherein the assumed characteristic calculation means calculates an assumed characteristic based on the two or more reference characteristics.   An operation control device comprising the operation condition determination device according to claim 10, wherein the operation control device controls operation of the vibration generator based on the operation condition determined by the operation condition determination device. An excitation coil that generates a static magnetic field, a drive coil that is provided in the static magnetic field generated by the excitation coil and is driven by electromagnetic force, a movable part that transmits the drive force of the drive coil to a specimen, and An operating condition determining program for realizing by a computer an operating condition determining device for determining an operating condition of a vibration generator having a cooling device for cooling an exciting coil and a driving coil,
The vibration generator changes vibration frequency with time to the specimen, and gives vibration to the specimen.
Acquire the reference characteristics that acquire the drive current / voltage / acceleration frequency characteristics that indicate the relationship between the drive current / voltage frequency and acceleration when the specimen is mounted on the movable part and driven by the reference excitation current / voltage. Means,
Based on the reference characteristics, the drive current / voltage necessary for realizing the required acceleration characteristics is calculated for each excitation frequency, and the exciting excitation that finds the excitation frequency that requires the largest drive current / voltage is found. A frequency calculation means;
Assuming that when the excitation current / voltage value is changed from the reference excitation current / voltage, the drive current / voltage / acceleration frequency characteristics at each assumed excitation current / voltage are calculated as the assumed characteristics based on the reference characteristics. Characteristic calculation means;
Necessary to obtain the acceleration characteristics required at the target excitation frequency when it is assumed that the target excitation frequency is fixed and excited based on the assumed characteristics. First assumed drive current / voltage calculating means for calculating a first assumed drive current / voltage;
When the cooling capacity of the cooler is operated with the assumed cooling capacity, the assumed temperature of the exciting coil and the assumed driving when the assumed exciting current / voltage is applied to the exciting coil under the respective assumed cooling ability. First assumed temperature calculation means for calculating an assumed temperature of the drive coil when current / voltage is applied to the drive coil;
Of the multiple combinations of the assumed excitation current / voltage and the assumed cooling capacity, when the vibration generator is operated with this combination, the expected temperature of the excitation coil and the drive coil does not exceed the predetermined temperature, and attention is paid Excitation operation condition selection means for selecting an assumed excitation current / voltage as an excitation operation condition in a combination in which the operation-related value satisfies a predetermined condition;
Based on the drive current / voltage / acceleration frequency characteristics with the assumed excitation current / voltage under the excitation operation conditions, the second assumed drive current / A second assumed driving current / voltage calculating means for calculating a temporal change in voltage;
When the cooling capacity of the cooler is operated at the assumed cooling capacity, the expected temperature of the exciting coil when the expected exciting current / voltage is applied to the exciting coil under the above-mentioned exciting operating conditions under each assumed cooling capacity. And a second assumed temperature calculating means for calculating a temporal change in the assumed temperature of the drive coil when an assumed drive current / voltage is applied to the drive coil;
Assuming that the vibration generator is operated with each assumed cooling capacity, the assumed cooling of the exciting coil and the drive coil does not exceed the predetermined temperature, and the expected operation-related value satisfies the predetermined condition A cooling operation condition selection means for selecting the capacity as the cooling operation condition;
An operation condition detecting means for outputting the excitation operation condition and the cooling operation condition as operation conditions;
Operating condition determination program for realizing the above with a computer. In the operating condition determination program according to claim 15,
The excitation operation condition selection unit is configured to assume that the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity, and the assumed excitation current / voltage is assumed. An operating condition characterized by selecting a combination satisfying the condition that the total power of the exciting power, the assumed driving power at the assumed driving current / voltage, and the assumed cooling power for obtaining the assumed cooling capacity is minimized. Decision program. In the operating condition determination program according to claim 15,
The operating condition selection means has a condition that, among a plurality of combinations of the assumed excitation current / voltage and the assumed cooling capacity, the assumed temperature of the excitation coil and the drive coil does not exceed a predetermined temperature and the cooling noise is minimized. An operating condition determination program that selects a satisfying combination as an operating condition. In the operating condition determination program according to any one of claims 15 to 17,
The reference characteristic acquisition means acquires at least two reference characteristics for at least two reference excitation currents / voltages having different voltages or currents,
The operating condition determination program characterized in that the assumed characteristic calculation means calculates an assumed characteristic based on the two or more reference characteristics.