CN107677440B - Center zero control method and system of vibrating table - Google Patents
Center zero control method and system of vibrating table Download PDFInfo
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Abstract
The application discloses a method for controlling the central zero position of a vibrating table, which comprises the following steps: step S100, obtaining a current vibration signal of an object to be tested on the vibration table; step S200, comparing the obtained current vibration signal of the object to be detected with preset position information; step S300, setting vibration parameters of the vibration table according to the comparison operation result of the step S200; executing step S100 according to the set vibration parameters of the vibration table; wherein the current vibration signal of the vibration table includes a first vibration signal and a second vibration signal. According to the method for controlling the central zero position of the vibrating table, provided by the application, the FPGA controller is used as a core, so that the real-time control of the central zero position of the vibrating table is realized, and meanwhile, the detection precision of the vibrating table is improved, and the stability of the vibrating table is more reliable.
Description
Technical Field
The application relates to the field of hardware detection, in particular to a method and a system for controlling a central zero position of a vibrating table.
Background
With the increasing demands on product safety and reliability (especially for aerospace products), the development of vibration test systems as key equipment for reliability tests is becoming increasingly important. The center zero control system of the moving part of the vibrating table is an important part of a vibration test system and is designed for maintaining the moving part of the vibrating table in a balance position to vibrate. A center zero control system is necessary for the moving parts of the vibrating table to ensure that the vibrating table is not affected by vibration frequency, air bags, fans or other external factors to cause the center of the vibrating table to shift. In the vibration test, the center zero position of the moving part of the vibration table is offset, so that a sample is wrinkled and bent, and an error exists in a vibration test result; or in extreme cases may lead to damage to the equipment.
At present, a sensor is generally used for converting a motion signal into an electric signal in the center zero position of a moving part of the vibrating table, and a voltage signal related to the position of the moving part of the vibrating table is output after the electric signal is subjected to an operational amplifier, so that a corresponding executing mechanism is driven to realize automatic centering. The system has the defects of poor environment anti-interference capability, offset caused by frequency change in the frequency sweeping process, easy misoperation on the central zero control of the moving part, and the like.
Based on the above problems, the present application provides a technical solution to solve the above technical problems.
Disclosure of Invention
The application aims to provide a method and a system for controlling the central zero position of a vibrating table, which take an FPGA controller as a core to realize real-time control of the central zero position of the vibrating table, and simultaneously improve the detection precision of the vibrating table so that the stability of the vibrating table is more reliable.
The technical scheme provided by the application is as follows:
a method of center zero control of a vibrating table comprising: step S100, obtaining a current vibration signal of an object to be tested on the vibration table; step S200, comparing the obtained current vibration signal of the object to be detected with preset position information; step S300, setting vibration parameters of the vibration table according to the comparison operation result of the step S200; executing step S100 according to the set vibration parameters of the vibration table; wherein the current vibration signal of the vibration table includes a first vibration signal and a second vibration signal.
Preferably, the step S200 includes: step S210, acquiring current center position information of the vibrating table according to the first vibration signal and the second vibration signal; step S220 is to compare the obtained current center position information with the preset position information, and obtain vibration offset information.
Preferably, before the step S100, the method further includes: step S000 acquires a control mode of the vibration table.
Preferably, the method comprises the steps of: when the control mode of the vibration table is in the first operation mode, the step S300 performs the following steps: step S311, when the vibration offset is larger than a preset offset, controlling the vibration table to execute a first control mode; step S312 controls the vibration table to execute the second control mode when the vibration offset is smaller than the preset offset.
Preferably, the method comprises the steps of: when the control mode of the vibration table is in the second operation mode, the step S300 performs the following steps: judging whether the vibration offset is equal to a preset offset or not; when the offset is not equal to the preset offset, executing a first control algorithm to acquire a first control parameter; executing a second control algorithm according to the acquired first control parameter; and acquiring a second control parameter of the vibrating table according to the second control algorithm, and adjusting the working parameter of the vibrating table.
A center zero control system of a vibrating table, which can execute the control method; comprising the following steps: the signal acquisition unit is used for acquiring the current vibration signal of the vibration table; the central control unit is connected with the signal acquisition unit and is used for comparing the acquired current vibration signal with preset position information; the work execution unit is respectively connected with the signal acquisition unit and the central control unit; setting control parameters of the vibrating table according to the comparison result of the central control unit, and further acquiring vibration information of the vibrating table through the signal acquisition unit according to the set control parameters of the vibrating table; wherein the current vibration signal of the vibration table includes a first vibration signal and a second vibration signal.
Preferably, the central control unit includes: the position information calculation module is used for acquiring current center position information according to the first vibration signal and the second vibration signal; and the offset information acquisition module is used for carrying out comparison operation on the acquired current center position information and the preset position information to acquire vibration offset information.
Preferably, the method further comprises: and the control mode acquisition module is connected with the signal acquisition unit and acquires the control mode of the vibrating table.
Preferably, the method comprises the steps of: the work execution unit includes: a first execution unit; when the vibration table is in the first working mode, the first execution unit comprises: according to the calculation result of the offset information acquisition module, when the vibration offset is larger than a preset offset, controlling the vibration table to execute a first control mode; and when the vibration offset is smaller than the preset offset, controlling the vibration table to execute a second control mode.
Preferably, the work execution unit further includes: a second execution unit; when the vibration table is in the second working mode, the second execution unit comprises: judging whether the vibration offset is equal to a preset offset or not according to the calculation result of the offset information acquisition module; when the offset is not equal to the preset offset, executing a first control algorithm to acquire a first control parameter; executing a second control algorithm according to the acquired first control parameter; and acquiring a second control parameter of the vibrating table according to the second control algorithm, and adjusting the working parameter of the vibrating table.
The method and the system for controlling the central zero position of the vibrating table can bring at least one of the following beneficial effects:
1. in the application, a metal sensor arranged on a vibrating table is utilized to collect vibration position signals measured by a metal sensing proximity switch, the measured vibration position signals are compared with a set origin position to calculate vibration table body position deviation information, vibration parameters of the vibrating table are adjusted according to the vibration table body position deviation information, and the vibration position signals of the vibrating table body are monitored again according to the adjusted vibration parameters to form a closed loop monitoring system; firstly, realizing the implementation control requirement on the position information of the vibrating table; and secondly, the metal induction proximity switch is adopted to measure the position signal, so that the influence of dust and the like can be effectively prevented, and the reliability is improved.
2. According to the application, the real-time vibration center position of the vibration table is calculated through the FPGA controller, whether the vibration center position exceeds a set offset position is judged, and a digital PID control algorithm and a frequency compensation algorithm are respectively adopted according to different offset ranges; a digital PID control algorithm ensures that the center is not shifted; the frequency compensation algorithm ensures that the vibration table cannot deviate due to frequency change in the frequency sweeping process. The application combines the digital calculation method with the hardware structure, and has the advantages of high accuracy, simple structure, easy realization, low cost, small volume, light weight, strong capability of resisting environmental interference and the like.
3. In the application, the control of static and dynamic center zero positions of the electric vibrating table can be conveniently completed through the PLC controller, and the engineering practical requirements are met.
Drawings
The above features, technical features, advantages and implementation manners of a method and a system for controlling the center zero of a vibrating table will be further described in a clear and understandable manner by describing preferred embodiments with reference to the accompanying drawings.
FIG. 1 is a flow chart of one embodiment of a method of center zero control of a vibrating table of the present application;
FIG. 2 is a flow chart of another embodiment of a method of center zero control of a vibrating table of the present application;
FIG. 3 is a flow chart of another embodiment of a method of center zero control of a vibrating table of the present application;
FIG. 4 is a flow chart of another embodiment of a method of center zero control of a vibrating table of the present application;
FIG. 5 is a flow chart of another embodiment of a method of center zero control of a vibrating table of the present application;
FIG. 6 is a block diagram of one embodiment of a center zero control system for a vibrating table in accordance with the present application;
figure 7 is a block diagram of another embodiment of a center zero control system for a vibrating table in accordance with the present application.
Detailed Description
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will explain the specific embodiments of the present application with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the application, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For the sake of simplicity of the drawing, the parts relevant to the novel form of the application are shown only schematically in the figures, which do not represent the actual structure of the product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
The application provides an embodiment of a method for controlling the central zero position of a vibrating table, and the embodiment is shown with reference to FIG. 1; comprising the following steps: step S100, obtaining a current vibration signal of an object to be tested on the vibration table; step S200, comparing the obtained current vibration signal of the object to be detected with preset position information; step S300, setting vibration parameters of the vibration table according to the comparison operation result of the step S200; executing step S100 according to the set vibration parameters of the vibration table; wherein the current vibration signal of the vibration table includes a first vibration signal and a second vibration signal.
Specifically, in this embodiment, a signal generating device is formed by combining a metal sensor and a metal sensing proximity switch, and up-down vibration signals of an object to be measured are collected, that is, pulse signals of the object to be measured are collected as a first vibration signal F1 and a second vibration signal F2; the central zero position of the moving part of the electric vibrating table is obtained through processing of the FPGA controller; comparing the detected central zero position with a set origin to obtain a central zero position offset; selecting a corresponding center zero control mode according to the motion state of the system, and performing operation processing on the center zero offset to obtain the final center zero offset compensation of the measured object; and sending the compensation quantity of the center zero offset to an execution component, and adjusting the working state of the vibrating table.
In the application, a metal sensor arranged on a vibrating table is utilized to collect vibration position signals measured by a metal sensing proximity switch, the measured vibration position signals are compared with a set origin position to calculate vibration table body position deviation information, vibration parameters of the vibrating table are adjusted according to the vibration table body position deviation information, and the vibration position signals of the vibrating table body are monitored again according to the adjusted vibration parameters to form a closed loop monitoring system; firstly, realizing the implementation control requirement on the position information of the vibrating table; and secondly, the metal induction proximity switch is adopted to measure the position signal, so that the influence of dust and the like can be effectively prevented, and the reliability is improved.
On the basis of the above embodiment, the present application further provides an embodiment, where the step S200 includes: step S210, acquiring current center position information according to the first vibration signal and the second vibration signal; step S220 is to compare the obtained current center position information with the preset position information, and obtain vibration offset information.
Specifically, in this embodiment, the FPGA controller in the central control unit calculates the real-time central zero position of the motion component of the electric vibration table according to the on time of the F1 and F2 pulse signals, where the preset position is a preset central zero position, that is, a standard zero position, and the real-time central zero position is judged and compared with the preset central zero position to determine the state of the real-time central zero position, and the working parameters of the electric vibration table, including the sweep frequency parameters, are adjusted according to the state of the real-time central zero position.
Preferably, before the step S100, the method further includes: step S000 acquires a control mode of the vibration table.
On the basis of the above embodiment, the present application also provides an embodiment, as shown with reference to fig. 2; comprising the following steps: when the control mode of the vibration table is in the first operation mode, the step S300 performs the following steps: step S311, when the vibration offset is larger than a preset offset, controlling the vibration table to execute a first control mode; step S312 controls the vibration table to execute the second control mode when the vibration offset is smaller than the preset offset.
Specifically, in this embodiment, the setting of the control mode of the FPGA controller by the user is obtained through the PLC controller; when the vibration table is in a non-working state, the control mode is in a first working mode, namely static control, and before the vibration table starts working, the center of the vibration table is deviated due to an air bag, a fan or other factors. And calculating the center zero offset of the moving part of the electric vibration table through the FPGA controller. The FPGA controller drives the output unit to act according to whether the offset dx is larger than 0 (preset offset), and if the offset dx is larger than 0 (preset offset), the air pump is controlled to start to deflate; if the offset dx is smaller than 0 (preset offset), the air pump is controlled to start pumping until the center is at the normal position.
On the basis of the above embodiments, the present application also provides an embodiment, as shown with reference to fig. 2 and 3; comprising the following steps: when the control mode of the vibration table is in the second operation mode, the step S300 performs the following steps: judging whether the vibration offset is equal to a preset offset or not; when the offset is not equal to the preset offset, executing a first control algorithm to acquire a first control parameter; executing a second control algorithm according to the acquired first control parameter; and acquiring a second control parameter of the vibrating table according to the second control algorithm, and adjusting the working parameter of the vibrating table.
Specifically, in this embodiment, the setting of the control mode of the FPGA controller by the user is obtained through the PLC controller; when the vibrating table is in a working state, the control mode is in a second working mode, namely dynamic control, when the vibrating table works, the vibrating table consists of induction metal (arranged on a moving coil of the vibrating table) and a metal induction proximity switch, and the control mode is used for acquiring pulse signals F1 and F2 of a tested object and transmitting the pulse signals F1 and F2 into the FPGA controller; along with the movement of the vibrating table, a metal induction proximity switch arranged on the table body of the vibrating table detects induction metal and correspondingly generates signals F1 and F2. The measured signals are transmitted to the FPGA controller after photoelectric isolation. The FPGA calculates the offset degree dx of the zero position of the center according to the input signal, and when the offset degree dx is larger, the FPGA starts the dynamic control PID controller, namely executes a first control algorithm; the control quantity (first control parameter) obtained by calculating the offset is sent to the power amplifier through the digital-to-analog converter, and the second control algorithm is executed to generate an inverse offset (second control parameter) so as to compensate the offset of the center of the table body.
The second control algorithm, namely the frequency compensation algorithm, ensures that the vibration table cannot deviate due to frequency change in the frequency sweeping process; referring to fig. 3;
sinusoidal frequency compensation algorithm g 1 (f)＝λ df d x
D in x For deviation displacement lambda df The compensation coefficient related to the frequency is taken as the following formula:
lambda in f To compensate for the constant, f is vibrationThe current operating frequency of the station, f L For the lower operating frequency of the oscillating table, f L For the upper limit frequency of the operation of the vibrating table, f 01 And f 02 Two frequency nodes for coefficient adjustment respectively. It can be seen from the above that when the current operating frequency of the oscillating table is low, the control effect of the frequency adjustment on the center is small, and λ increases with the frequency df Gradually approach lambda f Then at f 01 And f 02 The same is maintained. When the working frequency is greater than f 02 Lambda is at the time df Will decrease rapidly. f (f) L 、f H 、f 01 And f 02 And varies from one vibrating table to another.
A first control algorithm: digital PID control algorithm: the digital PID control algorithm is generally divided into a position PID control algorithm and an incremental PID control algorithm, and the position PID control algorithm is used in the system. The positional PID expression is:
wherein k- -the sampling sequence number; computer output values for the u (k) -kth sampling instant; e (k) -the offset value input at the kth sampling moment; e (k-1) -the offset value input at the kth-1 sampling time; k (K) i -integration coefficient, K i ＝K p T/T i ；K d -differential coefficient, K d ＝K p T/T d 。
In the position type PID control algorithm, as shown in the reference diagram, since the full amount is output, the error is accumulated every time the output is related to the past state, and the calculation workload is large.
As can be seen from the above equation, each time the output is related to all past states, to calculate u (k) involves not only e (k) and e (k-1), but also adding the past e (j), which is computationally complex and wasteful of memory. A simpler recurrence is derived below. For this purpose, the following actions are performed on the above formula:
consider the (k-1) th sampling to be:
subtracting (1-2) from the two sides of formula (1-1) to obtain
Is arranged to obtain
In the method, in the process of the application,
the formulas (1-3) are recursive forms of PID positional formulas, and are one of the common forms in programming. The flow chart is shown in the following figure. Wherein the coefficient a 0 、a 1 、a 2 Can be calculated in advance. Referring to fig. 4 and 5, a flow of the PID control algorithm is shown.
According to the application, whether the real-time vibration center position deviates from the set 0 point position is calculated by an FPGA controller, and a digital PID control algorithm and a frequency compensation algorithm are respectively adopted according to different deviation ranges; a digital PID control algorithm ensures that the center is not shifted; the frequency compensation algorithm ensures that the vibration table cannot deviate due to frequency change in the frequency sweeping process. The digital calculation method is combined with the hardware structure, and has the advantages of high accuracy, simple structure, easy realization, low cost, small volume, light weight, strong environment interference resistance and the like.
In the application, the control of static and dynamic center zero positions of the electric vibrating table can be conveniently completed through the PLC controller, and the engineering practical requirements are met.
The present application also provides an embodiment of a control system for a method for controlling a center zero of a vibrating table, which includes, with reference to fig. 6: a signal acquisition unit 100 for acquiring a current vibration signal of the vibration table; the central control unit 200 is connected with the signal acquisition unit and is used for comparing the acquired current vibration signal with preset position information; the work execution unit 300 is respectively connected with the signal acquisition unit and the central control unit; setting control parameters of the vibrating table according to the comparison result of the central control unit, and further acquiring vibration information of the vibrating table through the signal acquisition unit according to the set control parameters of the vibrating table; wherein the current vibration signal of the vibration table includes a first vibration signal and a second vibration signal.
On the basis of the above embodiments, the present application also provides an embodiment, the central control unit 200 includes: a position information calculating module 210, configured to obtain current center position information according to the first vibration signal and the second vibration signal; and the offset information obtaining module 220 is configured to perform a comparison operation on the obtained current center position information and the preset position information, so as to obtain vibration offset information.
On the basis of the above embodiment, the present application further provides an embodiment, further including: a control mode acquisition module 000, connected to the signal acquisition unit 100, acquires a control mode of the vibration table.
On the basis of the above embodiment, the present application further provides an embodiment, including: the work execution unit 310 includes: a first execution unit; when the vibration table is in the first working mode, the first execution unit comprises: according to the calculation result of the offset information acquisition module, when the vibration offset is larger than a preset offset, controlling the vibration table to execute a first control mode; and when the vibration offset is smaller than the preset offset, controlling the vibration table to execute a second control mode.
On the basis of the above embodiments, the present application further provides an embodiment, and the work execution unit 300 further includes: a second execution unit 320; when the vibration table is in the second working mode, the second execution unit comprises: judging whether the vibration offset is equal to a preset offset or not according to the calculation result of the offset information acquisition module; when the offset is not equal to the preset offset, executing a first control algorithm and a second control algorithm to acquire corresponding first control parameters and second control parameters; and adjusting the working parameters of the vibrating table according to the acquired first control parameters and second control parameters.
Based on the embodiments provided above, an embodiment is also provided; reference is made to fig. 7; in a control system of a vibrating table of the present application, comprising: a signal acquisition unit 100 for acquiring a current vibration signal of the vibration table; the signal acquisition unit includes: the induction metal and the induction switch are arranged on the moving coil on the vibrating table; the inductive switch is used for generating the first vibration signal and the second vibration signal by sensing information of the inductive metal. The central control unit is connected with the signal acquisition unit and is used for comparing the acquired current vibration signal with preset position information;
the work execution unit is respectively connected with the signal acquisition unit and the central control unit; setting control parameters of the vibrating table according to the comparison result of the central control unit, and further acquiring vibration information of the vibrating table through the signal acquisition unit according to the set control parameters of the vibrating table; wherein the current vibration signal of the vibration table includes a first vibration signal and a second vibration signal. The central control unit includes: an FPGA controller; a plurality of functional modules are arranged in the FPGA controller; the FPGA controller is provided with a position information calculation module, an offset information acquisition module, a digital-to-analog converter and an I/O communication interface; the position information calculation module is used for acquiring current center position information according to the first vibration signal and the second vibration signal; and the offset information acquisition module is used for carrying out comparison operation on the acquired current center position information and the preset position information to acquire vibration offset information. The FPGA controller sends and controls the result of the operation processing to the work execution unit to execute corresponding operation according to the work control mode information of the vibrating table acquired from the PLC controller; the work execution unit comprises a power amplifier and an air pump; a power amplifier is connected to the digital-to-analog converter in the central control end member; the air pump is connected with the I/O communication interface in the central control end member.
The operation control modes of the vibrating table comprise a static mode and a dynamic mode; when static, the table is shifted in center due to air bags, fans or other factors before starting operation. And calculating the center zero offset of the moving part of the electric vibration table through the FPGA controller. The FPGA controller drives the output unit to act according to whether the offset dx is larger than 0 (preset offset), and if the offset dx is larger than 0 (preset offset), the air pump is controlled to start to deflate; if the offset dx is smaller than 0 (preset offset), the air pump is controlled to start pumping until the center is at the normal position. When the vibration table works dynamically, the induction metal moves along with the vibration table, and the metal induction proximity switch arranged on the vibration table body detects the induction metal and correspondingly generates signals F1 and F2. The measured signals are transmitted to the FPGA controller after photoelectric isolation. And the FPGA calculates the offset degree of the zero position of the center according to the input signal, and starts the dynamic control PID controller when the offset is larger. The control quantity calculated according to the offset quantity is sent to a power amplifier through a digital-to-analog converter so that the power amplifier generates an inverse offset to compensate the offset quantity of the center of the table body.
In addition, the PLC is connected with the central control unit and is used for controlling the control mode of the vibrating table and acquiring the start/stop state of the FPGA controller; the man-machine interaction device is connected with the PLC and used for inputting a control module of a control system of the vibrating table; the man-machine interaction device comprises a display and an input device.
According to the application, whether the real-time vibration center position deviates from the set 0 point position is calculated by an FPGA controller, and a digital PID control algorithm and a frequency compensation algorithm are respectively adopted according to different deviation ranges; a digital PID control algorithm ensures that the center is not shifted; the frequency compensation algorithm ensures that the vibration table cannot deviate due to frequency change in the frequency sweeping process. The digital calculation method is combined with the hardware structure, and has the advantages of high accuracy, simple structure, easy realization, low cost, small volume, light weight, strong environment interference resistance and the like.
It should be noted that the above embodiments can be freely combined as needed. The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.
Claims (6)
1. A method of center zero control of a vibrating table, comprising:
step S000, obtaining a control mode of the vibrating table;
step S100, obtaining a current vibration signal of an object to be tested on the vibration table;
step S200, comparing the obtained current vibration signal of the object to be detected with preset position information;
step S300, setting control parameters of the vibrating table according to the comparison operation result of the step S200; executing step S100 according to the set control parameters of the vibrating table;
the current vibration signal of the object to be measured comprises a first vibration signal and a second vibration signal;
the step S200 includes:
step S210, acquiring current center position information of the vibrating table according to the first vibration signal and the second vibration signal;
step S220, comparing the obtained current center position information with the preset position information to obtain a vibration offset;
when the control mode of the vibration table is in the second operation mode, the step S300 performs the following steps: judging whether the vibration offset is equal to a preset offset or not;
step S321, when judging that the vibration offset is not equal to the preset offset, executing a first control algorithm and a second control algorithm to obtain corresponding first control parameters and second control parameters;
step S322 adjusts working parameters of the vibrating table according to the acquired first control parameters and second control parameters;
the second working mode is a dynamic control mode, the first control algorithm is executed to start the dynamic PID controller, the second control algorithm is a frequency compensation algorithm, the first control parameter is a control quantity obtained according to the vibration offset, and the second control parameter is a reverse offset generated by the second control algorithm and used for compensating the center offset of the vibration table body;
the frequency compensation algorithm is a sinusoidal frequency compensation algorithm:
g 1 (f)＝λ df d x ；
g in 1 (f) For sine frequency compensation, d x For deviation displacement lambda df The compensation coefficient related to the frequency is taken as the following formula:
lambda in f To compensate for the constant, f is the current operating frequency of the vibrating table, f L For the lower operating frequency of the oscillating table, f H For the upper operating frequency of the oscillating table, f 01 And f 02 Two frequency nodes for coefficient adjustment respectively.
2. A method of center zero control of a vibrating table according to claim 1, wherein the first vibration signal and the second vibration signal are generated by a metal-induced proximity switch.
3. A method of center zero control of a vibrating table according to claim 1, wherein the dynamic PID controller employs a positional PID control algorithm.
4. A method of center zero control of a vibrating table according to claim 1, comprising: when the control mode of the vibration table is in the first operation mode, the step S300 performs the following steps:
step S311, when the vibration offset is larger than a preset offset, controlling the vibration table to execute a first control mode;
step S312, when the vibration offset is smaller than a preset offset, controlling the vibration table to execute a second control mode;
the first working mode is a static control mode.
5. A control system for performing the method of center zero control of a vibrating table as recited in any one of claims 1-4, comprising:
the signal acquisition unit is used for acquiring a current vibration signal of the object to be measured on the vibration table;
the central control unit is connected with the signal acquisition unit and is used for comparing the acquired current vibration signal of the object to be detected with preset position information;
the work execution unit is respectively connected with the signal acquisition unit and the central control unit; setting control parameters of the vibrating table according to the comparison result of the central control unit, and further acquiring the current vibration signal of the object to be tested through the signal acquisition unit according to the set control parameters of the vibrating table; the current vibration signal of the object to be measured comprises a first vibration signal and a second vibration signal;
the position information calculation module is used for acquiring current center position information according to the first vibration signal and the second vibration signal;
the offset information acquisition module is used for carrying out comparison operation on the acquired current central position information and the preset position information to acquire vibration offset;
the control mode acquisition module is connected with the signal acquisition unit and used for acquiring a control mode of the vibrating table;
the work execution unit includes: a second execution unit;
when the vibration table is in the second working mode, the second execution unit comprises:
judging whether the vibration offset is equal to a preset offset or not according to the calculation result of the offset information acquisition module;
when the preset offset is not equal to the preset offset, executing a first control algorithm and a second control algorithm to acquire corresponding first control parameters and second control parameters;
and adjusting the working parameters of the vibrating table according to the acquired first control parameters and second control parameters.
6. The control system of claim 5, comprising: the work execution unit includes: a first execution unit;
when the control mode of the vibration table is in a first working mode, the first execution unit comprises:
based on the calculation result of the offset information acquisition module,
when the vibration offset is larger than a preset offset, controlling the vibration table to execute a first control mode;
when the vibration offset is smaller than the preset offset, controlling the vibration table to execute a second control mode;
the first working mode is a static control mode.
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| CN111649890A (en) * | 2020-06-29 | 2020-09-11 | 苏州苏试试验集团股份有限公司 | Method and device for controlling vibration table |
| CN113721451B (en) * | 2021-08-17 | 2024-06-14 | 北京航天希尔测试技术有限公司 | Automatic centering device for moving part of digital vibrating table |
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