JP2001117644A - Method for controlling electromagnetic vibration generation and the same device electromagnetic vibration generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove high-order components, and to obtain a proper vibration force in an electromagnetic vibration generator. SOLUTION: A reference pulse signal P is prepared at a prescribed duty rate in synchronism with an input pulse signal S from a vibration generating source, and at least one off-part α, β, etc., with preliminarily specified random timing and width are set in each pulse of the reference pulse signal for making it correspond to the size of control amplitude, corresponding to the amplitude by vibration of the vibration generating source so that an electrical control signal C can be obtained. Thus, it is possible to suppress generation of higher- order vibration components, by controlling a driving part according to the electrical control signal C. Also, it is possible to drive an electromagnet by proper driving currents corresponding to the amplitude by vibration of the vibration generating source, and to suppress the vibration of a vehicle by properly vibrating a mass member 25.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method of an electromagnetic vibration device suitable for actively suppressing vibration from a vibration source such as a vehicle and an electromagnetic vibration device.

[0002]

2. Description of the Related Art Conventionally, as this type of electromagnetic vibration device, for example, a yoke containing an electromagnet is mounted on a mounting bracket mounted on a vehicle body which is a vibration source, and a rubber elastic body is attached to the yoke. An electromagnetic damper provided with an elastically supported mass member, and drive control means for inputting an electric control signal to the electromagnet to generate a driving force having a magnitude corresponding to the magnitude of the electric control signal are provided. Things are known. This vibration device vibrates a mass member by driving an electromagnet, and actively suppresses vibration of a vibration source by a vibration force based on the vibration of the mass member.

[0003] As shown in FIG. 10, this electromagnetic vibration device responds to an input pulse signal S output from a rotary pulse sensor or the like having a frequency correlated with the vibration frequency of a vibration source.
An electric control signal C is generated in synchronization with this, the phase θ is shifted, and the magnitude of the control amplitude corresponding to the vibration amplitude of the vibration source is correlated with the magnitude of the duty ratio. Vibration is applied to the mass member by the driving means, and the vibration of the vehicle body is suppressed by the excitation force based on the vibration.

[0004]

However, in the above-mentioned electromagnetic vibration device, a signal component of a higher frequency besides the reference frequency is added to the drive signal for driving the electromagnet by turning on and off the electric control signal. However, there is a problem that an appropriate excitation force by the mass member is impaired. In contrast, FIG.
As shown in FIG. 1, a reference pulse signal P having a predetermined duty ratio synchronized with the input pulse signal S and generating less high-order components is formed, and the magnitude of the control amplitude corresponding to the vibration amplitude of the vibration source is determined. The electrical control signal C is replaced by correlating with the magnitude of the duty ratio, forming a carrier signal (not shown) having a predetermined frequency higher than the frequency of the reference pulse signal P, and superimposing the carrier signal on the reference pulse signal P. A forming method is conceivable. That is,
Due to the reference pulse signal component, the drive signal for driving the electromagnet is prevented from generating a signal component of a higher frequency in addition to the reference frequency, while a carrier signal having a duty ratio corresponding to the vibration amplitude of the vibration source is generated. The superposition is intended to control the amplitude of the drive signal.

However, according to the electric control signal C, when the duty ratio of the carrier signal component becomes small, a sufficient current for driving the electromagnet cannot be supplied due to the time constant of the electromagnet which is the actuator of the electromagnetic driving means. In addition, there is a problem that the relationship between the exciting force for exciting the mass member and the duty ratio of the carrier component becomes non-linear, and the effect of appropriately suppressing vibration cannot be exerted. An object of the present invention is to provide a control method of an electromagnetic vibration device and an electromagnetic vibration device that can easily remove higher-order components and obtain an appropriate vibration force. It is intended for.

[0006]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, a structural feature of the invention according to claim 1 is that the size of the electric control signal corresponding to the magnitude of the input electric control signal is large. A driving unit having an electromechanical conversion mechanism for generating a driving force, and a vibration member that is vibrated by the driving force of the driving unit are provided, and an electric control signal corresponding to a vibration input from a vibration source is applied to the driving unit to vibrate. In an electromagnetic vibration device that vibrates a member and actively suppresses vibration of a vibration source by a vibration force based on the vibration, a predetermined duty synchronized with an input pulse signal having a frequency correlated with a vibration frequency of the vibration source. A reference pulse signal of a ratio is formed, and the magnitude of the control amplitude corresponding to the vibration amplitude of the vibration source is replaced by correlating with the magnitude of the duty ratio, and the magnitude of the control pulse is larger than the frequency of the reference pulse signal. Forming a carrier signal of a predetermined frequency, superimposing the carrier signal on the reference pulse signal, and further increasing the pulse width of the first pulse of the carrier signal superimposed on each pulse of the reference pulse signal to be larger than the pulse width of the other pulses. Thus, an electrical control signal is formed.

According to the first aspect of the present invention, the duty ratio is set to a predetermined duty ratio which is synchronized with the input pulse signal having a frequency correlated with the vibration frequency of the vibration generation source and in which the generation of higher-order components is small. Due to the reference pulse signal component of the control signal, generation of a high-order component signal in the driving means can be suppressed, and an exciting force having an appropriate frequency component can be secured. Further, the adjustment of the excitation force based on the vibration of the vibration member is performed by replacing the magnitude of the control amplitude corresponding to the vibration amplitude of the vibration source with the magnitude of the duty ratio correlated thereto and a predetermined frequency higher than the frequency of the reference pulse signal. Can be performed by an electrical control signal formed by superimposing the carrier signal on the reference pulse signal. In addition, with respect to the carrier signal superimposed on the individual reference pulse components of the electric control signal, the pulse width of the first pulse is made larger than the pulse width of the other pulses. Therefore, when the duty ratio of the carrier signal decreases,
The disadvantage that the excitation force cannot be obtained according to the duty ratio of the carrier signal due to the delay of the response of the drive current of the drive unit to the input of the electric control signal is caused by making the pulse width of the first pulse wider than the pulse width of the subsequent pulses. By doing so, the response delay of the drive current can be covered. Therefore, the vibrating member can be vibrated by the drive current corresponding to the duty ratio of the carrier signal, that is, the driving current correlated with the vibration amplitude of the vibration generating source, and an appropriate excitation force based on the vibration of the vibrating member can be secured. As a result, according to the first aspect of the invention, the vibration at the vibration source can be actively suppressed by the appropriate excitation force.

According to a second aspect of the present invention, in the control method of the electromagnetic vibration device according to the first aspect, the electric control signal is superimposed on each pulse of the reference pulse signal. The pulse width of the first pulse of the obtained carrier signal is made larger than the pulse width of the other pulses, and the pulse width of the first pulse is made to have a magnitude correlated with the duty ratio of the carrier signal.

In the invention according to claim 2, the pulse width of the first pulse of the carrier signal superimposed on each control pulse of the electric control signal is made larger than the pulse width of the other pulses. Accordingly, even when the duty ratio of the carrier signal is reduced, it is possible to prevent a response delay of the drive current of the drive unit to the input of the electric control signal, and to obtain the exciting force of the vibration member according to the carrier signal. Furthermore, by setting the pulse width of the first pulse not to be constant but to a magnitude corresponding to the duty ratio of the carrier signal, it is possible to obtain a driving current having a magnitude more appropriately corresponding to the magnitude of the duty ratio of the carrier signal. As a result, it is possible to obtain an exciting force appropriately corresponding to the vibration amplitude of the vibration source. As a result, according to the second aspect of the invention, the vibration at the vibration source can be effectively suppressed by the more appropriate excitation force.

[0010] Further, a structural feature of the invention according to claim 3 is that a driving means having an electro-mechanical conversion mechanism for generating a driving force having a magnitude corresponding to the magnitude of the inputted electric control signal; A vibration member that is vibrated by the driving force of the driving means is provided, an electric control signal corresponding to a vibration input from the vibration source is applied to the driving means, and the vibration member is vibrated. In an electromagnetic excitation device that actively suppresses vibration, a reference pulse signal having a predetermined duty ratio synchronized with an input pulse signal having a frequency correlated with the vibration frequency of the vibration source is formed. In order to correlate the pulse with the control amplitude corresponding to the magnitude of the vibration amplitude of the vibration source, at least one off portion having a predetermined random timing and width is added. In that so as to form an electrical control signal by.

According to the third aspect of the present invention, the duty ratio is set to a predetermined duty ratio which is synchronized with the input pulse signal having a frequency correlated with the vibration frequency of the vibration source and in which the generation of higher-order components is small. Due to the reference pulse signal component of the control signal, generation of a high-order component signal in the driving means can be suppressed, and an exciting force having an appropriate frequency component can be secured. Further, the adjustment of the excitation force based on the vibration of the vibration member is performed by adding an off portion having a predetermined random timing and width to each pulse of the reference pulse signal to form an electric control signal. The driving is performed by controlling the driving current of the driving means by a signal. Therefore, a drive current appropriately corresponding to the electric control signal can be obtained, an exciting force appropriately corresponding to the vibration amplitude of the vibration source can be obtained, and a higher-order component obtained by the reference pulse signal component can be obtained. Higher-order component signals can be more effectively suppressed in addition to the effect of suppressing signal generation. As a result, according to the third aspect of the invention, the vibration of the vibration source can be effectively suppressed by the more appropriate excitation force.

[0012] Further, the structural feature of the invention according to claim 4 is the one according to any one of claims 1 to 3.
In the control method of the electromagnetic vibration device according to the item, while forming an electric control signal in advance based on the input pulse signal, a large number of pre-formed electric control signals are mapped and stored, and are inputted. An electric control signal is selected from the electric control signals stored according to the input pulse signal, and the selected electric control signal is applied to the driving means.

According to the fourth aspect of the present invention, it is possible to suppress the generation of a high-order component signal in the driving means, to secure a vibrating force having an appropriate frequency component, and to reduce the electric power. A drive current appropriately corresponding to the control signal is obtained, and an exciting force appropriately corresponding to the vibration amplitude of the vibration source can be obtained. Furthermore, the control configuration can be simplified by forming a control signal in advance based on an input pulse signal having a frequency correlated with the vibration frequency of the vibration generation source, mapping and storing the control signal. As a result, claim 4
According to the present invention, in addition to the effects of the first, second, and third aspects of the present invention, it is possible to reduce the cost of the control portion of the electromagnetic vibration device.

A structural feature of the invention according to claim 5 is that the driving means includes an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to the magnitude of the inputted electric control signal; A vibration member that is vibrated by the driving force of the driving means is provided, an electric control signal corresponding to a vibration input from the vibration source is applied to the driving means, and the vibration member is vibrated. In an electromagnetic excitation device that actively suppresses vibration, reference pulse signal forming means for forming a reference pulse signal having a predetermined duty ratio synchronized with an input pulse signal having a frequency correlated with a vibration frequency of a vibration source, Replace with the duty ratio that is correlated with the control amplitude corresponding to the vibration amplitude of the source, and form a carrier signal of a predetermined frequency higher than the frequency of the reference pulse signal. Carrier signal forming means for superimposing the carrier signal on the reference pulse signal, and further making the pulse width of the first pulse of the carrier signal superimposed on each pulse of the reference pulse signal larger than the pulse width of the other pulses. And an electric control signal forming means for forming an electric control signal.

According to the fifth aspect of the present invention, the input pulse signal having a frequency correlated with the vibration frequency of the vibration source generated by the reference pulse signal forming means is synchronized with the generation of higher-order components. With the reference pulse signal component having a small predetermined duty ratio, generation of a high-order component signal in the driving means can be suppressed, and an exciting force having an appropriate frequency component can be secured. Further, the adjustment of the excitation force is performed by using a carrier signal of a predetermined frequency in which the magnitude of the control amplitude corresponding to the vibration amplitude of the vibration source is replaced by the magnitude of the duty ratio correlated with the reference pulse by the electric control signal forming means. This can be performed by an electric control signal obtained by superimposing the signal. Moreover, in the carrier signal component superimposed on each pulse of the electric control signal, the pulse width of the first pulse is made larger than the pulse width of the other pulses by the electric control signal generating means. Therefore, when the duty ratio of the carrier signal becomes small, the response of the drive current to the input of the electric control signal by the drive unit is delayed, so that the excitation force corresponding to the carrier signal cannot be obtained. This can be avoided by making the pulse width wider than the pulse width of the subsequent pulse, and the response delay of the drive current can be covered. Therefore, the driving member can vibrate the vibrating member with a driving current corresponding to the duty ratio of the carrier signal, that is, the driving current according to the vibration amplitude of the signal generation source, and an appropriate excitation force can be secured. As a result, according to the fifth aspect of the invention, the electromagnetic vibration device can actively suppress the vibration of the vibration generation source with an appropriate vibration force.

According to a sixth aspect of the present invention, in the electromagnetic vibration device according to the fifth aspect, a carrier signal is superimposed on a reference pulse signal instead of the electric control signal forming means. Further, the pulse width of the first pulse of the carrier signal superimposed on each pulse of the reference pulse signal was made larger than the pulse width of the other pulses, and the pulse width of the first pulse was correlated with the duty ratio of the carrier signal. A second electric control signal forming means for forming an electric control signal by making the size larger is provided.

According to the sixth aspect of the present invention, the second electric control signal forming means changes the pulse width of the first pulse of the carrier signal superimposed on each pulse of the reference pulse signal to another pulse. By making the pulse width larger than the pulse width, when the duty ratio of the carrier signal is reduced, it is possible to prevent a response delay of the drive current by the drive unit to the input of the control signal, and to prevent a response delay of the vibration member according to the carrier signal. Excitation force is obtained. Further, the pulse width of the first pulse is not fixed by the second electric control signal forming means but is made to have a size corresponding to the duty ratio of the carrier signal, so that the duty ratio of the carrier signal can be more appropriately adjusted. A corresponding drive current can be obtained, and an exciting force appropriately corresponding to the vibration amplitude of the vibration source can be obtained. As a result, according to the sixth aspect of the invention, the vibration of the vibration source can be actively suppressed by a more appropriate excitation force.

The present invention according to claim 7 is characterized in that the driving means includes an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to the magnitude of the input electric control signal; A vibration member that is vibrated by the driving force of the driving means is provided, an electric control signal corresponding to a vibration input from the vibration source is applied to the driving means, and the vibration member is vibrated. An electromagnetic vibrating apparatus for actively suppressing vibration, wherein a reference pulse signal forming means and a carrier signal forming means according to claim 5 and an electric control signal forming means according to claim 5 or claim 6. A storage means for mapping and storing a large number of electrical control signals formed in advance based on an input pulse signal having a frequency correlated with the vibration frequency of the vibration source using the second electrical control signal forming means; And an electrical control signal reading means for reading an electrical control signal from the corresponding storage means in response to an input of the pulse signal is provided, certain electrical control signal read out by the electric control signal reading means applying to the driving means.

According to the seventh aspect of the present invention, as described above, the reference pulse signal forming means, the carrier signal forming means, and the electric control signal forming means or the second electric control signal forming means are used to oscillate. With respect to the electric control signal formed based on the input pulse signal having a frequency correlated with the vibration frequency of the source, the electric control signal is mapped and stored in the storage means, and the electric control signal is read out according to the input pulse signal. The appropriate electric control signal can be read by the means, and the driving means can be driven by the read control signal. Therefore, as described in the fifth and sixth aspects, generation of a high-order component signal in the driving means can be suppressed, and an exciting force having an appropriate frequency component can be ensured. A drive current appropriately corresponding to the electric control signal is obtained, and an exciting force appropriately corresponding to the vibration amplitude of the vibration source can be obtained. Further, since the electric control signal is mapped and stored in the storage unit, and the electric control signal reading unit reads out the electric control signal corresponding to the input pulse signal from the vibration source, the control configuration can be simplified. The cost of the control part can be reduced. As a result, according to the seventh aspect of the present invention, the vibration of the vibration source can be actively suppressed by an appropriate excitation force, and the control portion of the device can be mass-produced when the electromagnetic excitation device is mass-produced. It can be provided at low cost.

Further, the constitution of the invention according to claim 8 is characterized in that the driving means includes an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to the magnitude of the inputted electric control signal; A vibration member that is vibrated by the driving force of the driving means is provided, an electric control signal corresponding to a vibration input from the vibration source is applied to the driving means, and the vibration member is vibrated. In an electromagnetic excitation device that actively suppresses vibration, reference pulse signal forming means for forming a reference pulse signal having a predetermined duty ratio synchronized with an input pulse signal having a frequency correlated with a vibration frequency of a vibration source, For each pulse of the pulse signal,
A third electrical control signal that forms an electrical control signal by providing at least one off portion of predetermined random timing and width to correlate with a control amplitude of magnitude corresponding to the vibration amplitude of the vibration source; A second storage means for mapping and storing a number of electric control signals formed in advance based on an input pulse signal having a frequency correlated with the vibration frequency of the vibration source using the forming means; Second electric control signal reading means for reading a corresponding electric control signal from the second storage means in accordance with
An object of the present invention is to add an electric control signal read by the second electric control signal reading means to the driving means.

In the invention according to claim 8, the input pulse having a frequency correlated with the vibration frequency of the vibration source is used in advance by using the reference pulse signal forming means and the third electric control signal forming means. With respect to the electric control signal formed based on the signal, the electric control signal is mapped and stored in the second storage means.
An appropriate electric control signal can be read by the electric control signal reading means, and the driving of the driving means can be controlled by the read electric control signal. That is, the reference pulse component of the electric control signal formed by the electric control signal forming means and having a predetermined duty ratio synchronized with the input pulse signal having a frequency correlated with the vibration frequency of the vibration generation source and having a small generation of higher order components. Accordingly, it is possible to suppress the generation of a high-order component signal in the driving unit, and it is possible to secure an exciting force having an appropriate frequency component. Further, the adjustment of the excitation force based on the vibration of the vibration member is performed by applying an off portion having a predetermined random timing and width to each pulse of the reference pulse signal by the third electric control signal forming means. This can be performed by forming a control signal and controlling the driving of the driving means by the electric control signal. Therefore, a drive current appropriately corresponding to the electric control signal can be obtained, an exciting force appropriately corresponding to the vibration amplitude of the vibration source can be obtained, and a higher-order component obtained by the reference pulse signal component can be obtained. In addition to the effect of suppressing the generation of a signal, the higher-order component signal can be suppressed more effectively.

Further, the electric control signal is mapped and the second
Since the electric control signal corresponding to the input of the input signal is stored in the storage means and read by the second electric control signal reading means, the control configuration can be simplified, and the cost of the control part can be reduced. . As a result, according to the invention of claim 8, the vibration of the vibration source can be effectively suppressed by the appropriate vibration force of the electromagnetic vibration device, and when the electromagnetic vibration device is mass-produced. In addition, the control portion of the device can be provided at low cost.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an electromagnetic vibration device applied to a vibration control object such as a car body to which the embodiment is applied. FIG. 2 is a schematic cross-sectional view of a vibration damper, which is a main part of an electromagnetic vibration device. This electromagnetic vibration device,
The vibration control device includes a vibration damper 10 and a drive control unit 30 that generates an exciting force by controlling the drive of the vibration damper 10.

As shown in FIG. 2, the vibration damper 10 has a mounting bracket 11, an electromagnet 16 supported by a yoke 15 fixed thereto, and a coaxial position (a predetermined distance from the yoke 15). A mass member 25 arranged on the upper side in the figure)
A substantially cylindrical rubber elastic body 21 for connecting the yoke 15 and the mass member 25 is provided. The mounting bracket 11 is a cylindrical part 1 having a bottom.
2 and an annular flange portion 13 extending outward in the direction perpendicular to the axis on the opening side (the lower side in the figure), and mounting holes penetrating the plate surface at a plurality of locations in the circumferential direction of the flange portion 13. 13
a is provided. A cylindrical yoke 15 is coaxially arranged and fixed on the entire flat surface of the cylindrical portion 12. Electromagnets 16 are coaxially and annularly arranged and embedded in the yoke 15, and the upper surface of the electromagnet 16 is exposed on the upper surface of the yoke 15.

The rubber elastic body 21 has a small diameter inner ring portion 2.
2 and a large-diameter outer ring portion 23, and both ring portions 22, 23 are arranged coaxially and slightly offset from each other in the axial direction. That is, one end side of the outer ring portion 23 is slightly separated from the inner ring portion 22 in the axial direction. The axial length of the inner ring portion 22 is substantially the same as the axial length of the yoke 15, and is slightly shorter than the axial length of the outer ring portion 23. A cylindrical rubber portion 24 is formed by vulcanization molding between the entire outer peripheral surface of the inner ring portion 22 and the inner peripheral surface from the other end side of the outer ring portion 23 to substantially the center in the axial direction. The two ring portions 22 and 23 are elastically connected. That is, both end surfaces of the rubber portion 24 are slightly inclined in a direction shifted in the axial direction of the outer ring portion 23 with respect to the inner ring portion 22.

The rubber elastic body 21 is fixed to the yoke 15 by pressing the inner ring portion 22 into the yoke 15. A cylindrical block-shaped mass member 25 is press-fitted to the inner peripheral surface 23a of the rubber elastic body 21 to which the rubber portion 24 of the outer ring portion 23 is not bonded. In this state, a flat space S having a predetermined size is provided between the plane of the yoke 15 (the upper surface in the figure) and the plane of the mass member 25 (the lower surface in the figure). The vibration damper 10 is mounted on the vehicle body by fixing the mounting bracket 11 to a vehicle body-side member that is a vibration generation source via a mounting hole 13a with a bolt or the like.
The electromagnet 16 is connected to the drive unit 35 of the drive control unit 30 by a lead wire.

Next, a description will be given of a drive control means for controlling the energization state of the electromagnet 16 of the vibration damper 10. As shown in FIG. 1, the drive control unit 30 includes a control unit 31 including a microcomputer and the like, and a drive unit 35. The control unit 31 receives an input pulse signal S having a frequency correlated with a vibration frequency of a vibration source such as a rotation pulse of a rotation speed sensor provided in the engine, and the frequency and various operating states (correlated with amplitude and phase). , A storage section 33 for storing a large number of control signals C formed in advance based on the input pulse signal S, and an appropriate control from the storage section 33 based on the signal data from the signal reading section 32. Arithmetic unit 3 for selecting signal C and outputting it to drive unit 35
4. The drive unit 35 for turning on and off the energization of the electromagnet 16 is connected to the output side of the calculation unit 34 of the control unit 31. The drive unit 35 receives the control signal C
Switching FET 36 which is turned on / off according to the input of
The output resistor 37 is connected to the output side of the FET 36, and the electromagnet 16 of the vibration damper is connected to both ends of the output resistor 37. Further, power is applied to both ends of the FET 36 and the output resistor 37.

Next, the formation of the control signal C will be described with reference to FIG. First, a reference pulse having a frequency and a phase θ synchronized with the input pulse signal S having a frequency correlated with the vibration frequency of the vibration source and having a duty ratio near 50% at which the generation of higher-order components is the least. The signal P is formed. Here, it is assumed that the control frequency covers a low frequency range of about 20 to 100 Hz corresponding to idling or the like. Further, a carrier signal (not shown) having a frequency higher than the input pulse signal S, for example, 200 Hz to 1 kHz and a duty ratio correlated with the vibration amplitude of the vibration source is formed. The carrier signal can be formed by directly using a shift position position signal, a vehicle speed signal, and the like that are correlated with the vibration amplitude of the vibration source, but can also be formed experimentally by using these data. .

Further, a control signal C is obtained by superimposing a carrier signal on the reference pulse signal P. As shown in FIGS. 3 and 4, the control signal C is composed of individual pulses P ₁ of the reference pulse signal P. It has been changed to be larger than the subsequent width of the pulse C ₂ a first width of the pulse C ₁ in the individual control pulse C ₀ of superimposed carrier signal. In FIG. 4, the upper part shows the control pulse C ₀ , and the lower part shows the drive current. According to the change in the duty ratio of the carrier pulse (50% in FIG. 4A and 33% in FIG. 4B), The drive current changes.

If the width of the carrier pulse superimposed on the control signal C is all uniform, a drive current cannot be obtained due to a response delay of the current to the control signal C when the duty ratio of the carrier pulse becomes too small. as can be started up a current in the first pulse C _1, is of the width of the pulse C ₁ is made larger than the subsequent width of the pulse C _2. In this manner, an appropriate control signal C created in advance in accordance with the input pulse signal S is mapped, and the mapped data is stored in the storage unit 33. Storage unit 33
Is read out by the calculation unit 34 in accordance with the input pulse signal S input to the signal reading unit 32. The control signal C has a complicated configuration of the control unit. However, the control signal C can be formed by the calculation unit 34 in accordance with the input pulse signal S and output to the drive unit 35 as it is.

Next, the operation of the first embodiment configured as described above will be described. The control unit 31 starts operating in response to the turning on of the ignition switch, and the input pulse signal S is input and read by the signal reading unit 32. Further, the arithmetic unit 34 calculates the frequency of the input pulse signal S by calculation, and the control signal C corresponding to the amplitude and phase at that frequency is read from the storage unit 33 and output to the external drive unit 35. . Based on the input control signal C, a drive current is formed by the drive unit 35, and thereby the energization of the electromagnet 16 is controlled. The mass member 25 vibrates in the axial direction (vertical direction in the drawing) by repeating the attraction and the attraction stop of the mass member 25 to the electromagnet 16 in accordance with the energization of the electromagnet 16 and the stop of the energization. The rubber elastic body 21 is deformed by an exciting force accompanying the vibration of the mass member 25, and the deformation causes the mounting bracket 11 to be moved from the vehicle body side.
The vibration suppression effect of actively canceling the low-frequency vibration input transmitted to the motor is exhibited.

[0032] At this time, since the duty ratio of the individual control pulse C ₀ of the control signal C output from the operation unit 34 is set to a hard value to generate a high-order component, the occurrence of high-order component in the drive current And the mass member 25
Can be vibrated at an appropriate frequency. Further, as described above, the first width of the pulse C ₁ Carrier pulse of each of the control pulse C ₀ corresponding to the change in the superimposed amplitude was duty ratio is larger than C ₂ pulse width of a subsequent pulse Thus, when the duty ratio of the carrier pulse signal component is reduced, it is possible to prevent a response delay of the drive current input to the electromagnet 16 with respect to the input of the control signal C. Therefore, the electromagnet 16 can be driven with a drive current according to the duty ratio of the carrier signal, that is, according to the vibration amplitude of the signal generation source. As a result, an appropriate vibration force of the vibration damper 10 can be generated by appropriate vibration by the mass member 25, so that vibration of the vehicle body can be appropriately suppressed. Also, an appropriate control signal C is created and mapped in advance in accordance with the frequency of the input pulse signal S, and the mapped data is stored in the storage unit 33 so that the appropriate control signal is read from the storage unit 33. Because it is configured, the control part can be simplified,
When mass production of the vibrating device is performed, the cost of the control portion can be reduced.

Here, specific experimental results on the first embodiment will be described. Regarding the electromagnetic vibration device by the vibration control method according to the present embodiment and the electromagnetic vibration device by the conventional vibration control, a primary component which is a desired vibration force of the vibration damper 10 in a predetermined frequency range. And secondary and tertiary components, which are unnecessary higher-order frequency components, were measured.
The measurement results are shown in FIG. 5A for the present embodiment and FIG. 5B for the conventional example. As is clear from FIG. 5, the primary component has almost no difference between the product of the present embodiment and the conventional product, but the secondary component and the tertiary component have extremely large values of the conventional product as a whole. It became clear that the embodiment component can reduce the secondary component and the tertiary component by about 3 Nrms.

Next, a modification of the first embodiment will be described. In a modified example, the control signal C is obtained by superimposing on the reference pulse signal P a carrier signal having a frequency higher than that of the input pulse signal S, for example, a frequency of 200 Hz to 1 kHz and a duty ratio proportional to the amplitude of the input pulse signal S. further, as shown in FIG. 6, as well as larger than the first pulse C ₁ of width of the subsequent pulse C ₂ keep carrier pulses superimposed on the individual control pulse C _0, the first pulse C ₁ The width is variable so as to have a size corresponding to the duty ratio of the carrier signal (50% in FIG. 6A, 33% in FIG. 6B).

[0035] Also in the modification of the structure, as described in the first embodiment, the duty ratio of each of the control pulse C ₀ of the control signal C output from the calculation unit 34 is less likely to generate a high-order component Since the value is set to a value, generation of higher-order components in the drive current can be suppressed, and the mass member 25 can be vibrated at an appropriate frequency. Further, as described above, superimposed on the individual control pulse C _0, the first width of the pulse C ₁ subsequent pulse C ₂ pulses of the carrier pulse duty ratio corresponding to the change in the vibration amplitude of the vibration source By making the width wider than the width, it is possible to prevent a response delay of the drive current input to the electromagnet 16 with respect to the input of the control signal, and to use the drive current according to the duty ratio of the carrier signal, that is, the drive current according to the vibration amplitude of the signal generation source. The electromagnet 16 can be driven.

Further, in the modification, the control pulse C
The width of the first pulse C ₁ is in the size corresponding to the duty ratio of the carrier signal at _0. Therefore, it is possible to prevent a response delay of the driving current and, when the duty ratio is small, to prevent the generated force from becoming larger than a prescribed value due to the width of the first pulse being too wide. Further, an appropriate excitation force can be secured. As a result, in the modified example,
Since a more appropriate excitation force can be generated in the vibration damper 10, vehicle body vibration can be more appropriately suppressed.

Next, a second embodiment of the present invention will be described. In the present embodiment, as shown in FIG.
The frequency is synchronized with the input pulse signal S and the phase is appropriately shifted, and the duty ratio is formed in the reference pulse signal P as a value having the least high-order component. further,
In order to correspond to the magnitude of the control amplitude correlated with the vibration amplitude of the vibration source, the off-parts α, β,...
The control signal C is formed by adding at least one of the above. The control signal C controls the energization of the electromagnet 16. For example, as shown in FIG. 8, the control pulse C ₀ duty ratio of the reference pulse signal is 60%, the control signal C by providing the off portion alpha, beta at 22% and 46% of the time and 5% width Is formed. The formation of the off portion is obtained experimentally in order to obtain a control amplitude corresponding to the vibration amplitude of the vibration source. The control signal C data obtained in advance in this way is mapped and stored in the storage unit 33. Although the control configuration of the control signal C is complicated, the control signal C can be formed in the control unit according to the input pulse signal.

[0038] Also in the second embodiment of the above-described configuration, as described in the first embodiment, each duty ratio of the control pulse C ₀ of the control signal C output from the operation unit 34 is a high-order component Since the value is set to a value that hardly occurs, the generation of higher-order components in the drive current can be suppressed, and the mass member 25 can be vibrated at an appropriate frequency. Further, the control of the excitation force based on the vibration of the mass member 25 is performed by adding off-points α, β,... Of a predetermined random timing and width to each pulse P1 of the reference pulse signal P. C is formed, and the conduction state of the electromagnet 16 is controlled by the control signal C. As a result, a drive current appropriately corresponding to the control signal C is obtained, and a vibration force of the vibration damper 10 appropriately corresponding to the vibration amplitude of the vibration source can be obtained. Further, in the present embodiment, in addition to the effect of suppressing the generation of the higher-order component signal obtained from the reference pulse signal component, the higher-order component signal can be more effectively suppressed. As a result, also in the present embodiment, similar to the first embodiment, an appropriate excitation force can be generated in the vibration damper 10, so that the vehicle body vibration can be appropriately suppressed.

Here, specific experimental results on the second embodiment will be described. In a given frequency range,
With respect to the vibration device according to the vibration control of the present embodiment, the vibration force of the mass member 25 was measured for a primary component that is a desired vibration force and a secondary component and a tertiary component that are unnecessary high-order frequency components. FIG. 9 shows the measurement results. FIG.
5 (b), which is the result of the conventional example, shows that the primary component is almost the same as the product of the present invention and the conventional product, but the secondary component and the tertiary component are 3 times smaller than the conventional product.
It can be reduced to a value as low as about 6 Nrms, and it has become clear that superior results can be obtained as compared with the experimental results of the first embodiment.

In each of the above embodiments, the rotation pulse signal of the engine is used as the input pulse signal of the frequency created at the vibration frequency of the vibration source. A vehicle state detection signal such as a shift position and a water temperature can also be used. Further, in the above-described embodiment, the vibration damper is targeted as a vibration device, and this vibration damper does not have a liquid chamber. However, a vibration damper having a liquid chamber may be used. Good. Further, the vibration device may be a vibration isolator with or without a liquid chamber used for vibration isolation support of an engine or the like. Further, the vibration device of the present invention may be applied to uses other than automobiles. In addition, what is shown in the present embodiment is an example, and various changes can be made without departing from the spirit of the present invention.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an overall configuration of an electromagnetic vibration device applied to a vehicle according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a vibration damper of the electromagnetic vibration device.

FIG. 3 is an explanatory diagram illustrating a signal formation state of the electromagnetic vibration device.

FIG. 4 is an explanatory diagram illustrating a relationship between a control signal C and a driving current.

FIG. 5 is a graph showing experimental results of a vibration force in a predetermined frequency range for the vibration device of the first embodiment and a conventional vibration device.

FIG. 6 is an explanatory diagram illustrating a relationship between a control signal C and a drive current in a modified example.

FIG. 7 is an explanatory diagram illustrating a signal forming state of the electromagnetic vibration device according to the second embodiment.

FIG. 8 is an explanatory diagram showing the control signal in detail.

FIG. 9 is a graph showing an experimental result on an exciting force in a predetermined frequency range for the exciting device of the second embodiment.

FIG. 10 is an explanatory diagram illustrating a signal forming state of a conventional electromagnetic vibration device.

FIG. 11 is an explanatory diagram illustrating a signal forming state of another conventional electromagnetic vibration device.

[Explanation of symbols]

10 damper, 11 mounting bracket, 15 yoke, 16
Electromagnet, 21: rubber elastic body, 22: inner ring portion, 23
... outer ring part, 24 ... rubber part, 25 ... mass member, 30
... drive control means, 31 ... control unit, 32 ... signal reading unit,
33: storage unit, 34: calculation unit, 35: drive unit.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3J048 AA07 AC08 AD01 BE09 CB12 EA36 5H004 GA09 GA40 GB12 HA12 HB12 KA22 LA20 MA04 MA08

Claims (8)

[Claims] 1. A driving means having an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to a magnitude of an input electric control signal, and a vibration member vibrated by the driving force of the driving means. An electromagnetic control signal corresponding to a vibration input from the vibration source is applied to the driving means to vibrate the vibration member, and an excitation force based on the vibration actively suppresses the vibration of the vibration source. In the vibration device, a reference pulse signal having a predetermined duty ratio synchronized with an input pulse signal having a frequency correlated with the vibration frequency of the vibration source is formed, and a control amplitude corresponding to the vibration amplitude of the vibration source is generated. Is replaced by correlating with the magnitude of the duty ratio, and a carrier signal having a predetermined frequency higher than the frequency of the reference pulse signal is formed, and the carrier signal is used as the reference pulse signal. And forming the electric control signal by making the pulse width of the first pulse of the carrier signal superimposed on each pulse of the reference pulse signal larger than the pulse width of the other pulses. A method for controlling an electromagnetic vibration device. 2. In the electric control signal, a pulse width of a first pulse of the carrier signal superimposed on each pulse of the reference pulse signal is made larger than a pulse width of another pulse, and the first pulse is further added. 2. The method according to claim 1, wherein the pulse width is set to a magnitude correlated with the duty ratio of the carrier signal. 3. A driving means having an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to a magnitude of an input electric control signal, and a vibration member vibrated by the driving force of the driving means. An electromagnetic control signal corresponding to a vibration input from the vibration source is applied to the driving means to vibrate the vibration member, and an excitation force based on the vibration actively suppresses the vibration of the vibration source. In the vibration device, a reference pulse signal having a predetermined duty ratio synchronized with an input pulse signal having a frequency correlated with the vibration frequency of the vibration source is formed, and for each pulse of the reference pulse signal, Controlling the electrical control by adding at least one off portion of predetermined random timing and width to correlate with a control amplitude corresponding to the magnitude of the vibration amplitude; Control method for an electromagnetic vibrator which is characterized in that so as to form a No.. 4. An electric control signal is formed in advance on the basis of the input pulse signal, and a large number of electric control signals formed in advance are mapped and stored, and in accordance with the input pulse signal input. 4. A method according to claim 1, wherein a corresponding electric control signal is selected from the stored electric control signals, and the selected electric control signal is applied to said driving means. 2. The control method for an electromagnetic vibration device according to claim 1. 5. A driving means having an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to the magnitude of an input electric control signal, and a vibration member vibrated by the driving force of the driving means. An electromagnetic control signal corresponding to a vibration input from the vibration source is applied to the driving means to vibrate the vibration member, and an excitation force based on the vibration actively suppresses the vibration of the vibration source. In the vibration device, reference pulse signal forming means for forming a reference pulse signal having a predetermined duty ratio synchronized with an input pulse signal having a frequency correlated with the vibration frequency of the vibration source, and a vibration amplitude of the vibration source A carrier signal type that replaces the duty ratio with the magnitude of the control amplitude and forms a carrier signal of a predetermined frequency higher than the frequency of the reference pulse signal. Means for superimposing the carrier signal on the reference pulse signal, and further making the pulse width of the first pulse of the carrier signal superimposed on each pulse of the reference pulse signal larger than the pulse width of the other pulses. And an electric control signal forming means for forming the electric control signal. 6. Instead of the electric control signal forming means,
The carrier signal is superimposed on the reference pulse signal, and the pulse width of the first pulse of the carrier signal superimposed on each pulse of the reference pulse signal is made larger than the pulse width of the other pulses, and 6. The electromagnetic processing apparatus according to claim 5, further comprising a second electric control signal forming means for forming an electric control signal by setting a pulse width to a magnitude correlated with a duty ratio of the carrier signal. Shaking device. 7. A driving unit having an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to a magnitude of an input electric control signal, and a vibration member vibrated by the driving force of the driving unit are provided. An electromagnetic control signal corresponding to a vibration input from the vibration source is applied to the driving means to vibrate the vibration member, and an excitation force based on the vibration actively suppresses the vibration of the vibration source. In the vibration device, the reference pulse signal forming unit and the carrier signal forming unit according to claim 5, and the electric control signal forming unit according to claim 5 or the second electric control signal forming unit according to claim 6. Storage means for mapping and storing a large number of electric control signals formed in advance based on an input pulse signal having a frequency correlated with the vibration frequency of the vibration source, using the input pulse signal An electric control signal reading means for reading a corresponding electric control signal from the storage means in accordance with an input; and providing the electric control signal read by the electric control signal reading means to the driving means. Type vibration device. 8. A driving means provided with an electromechanical conversion mechanism for generating a driving force having a magnitude corresponding to the magnitude of an input electric control signal, and a vibration member vibrated by the driving force of the driving means. An electromagnetic control signal corresponding to a vibration input from the vibration source is applied to the driving means to vibrate the vibration member, and an excitation force based on the vibration actively suppresses the vibration of the vibration source. In the vibration device, reference pulse signal forming means for forming a reference pulse signal having a predetermined duty ratio synchronized with an input pulse signal having a frequency correlated to the vibration frequency of the vibration source, and for each pulse of the reference pulse signal, In order to correlate with a control amplitude having a magnitude corresponding to the vibration amplitude of the vibration source,
Inputting a frequency correlated with the vibration frequency of the vibration source using a third electric control signal forming means for forming an electric control signal by providing at least one off portion having a predetermined random timing and width. A second storage unit that maps and stores a number of electric control signals formed in advance based on the pulse signal; and a second storage unit that reads a corresponding electric control signal from the second storage unit in response to the input of the input pulse signal. And an electric control signal readout means, wherein the electric control signal read by the second electric control signal readout means is applied to the drive means.