Machine tool environment vibration simulation device and control system based on electric vibrator

Abstract

The invention relates to the technical field of simulation control, and discloses a machine tool environment vibration simulation device and a control system based on an electric vibrator. A signal generation module generates a control signal according to a control instruction through a signal generation strategy; an excitation drive module amplifies the control signal and drives the excitation module; a feedback monitoring module monitors the working state data of the machine tool under test, and generates feedback information, and makes adjustments according to needs, thereby improving the accuracy and efficiency of the test; a safety protection module identifies an abnormal state adjusted according to the feedback information, and performs safety protection according to the abnormal state. Once an abnormality is detected, safety protection measures are immediately implemented to prevent equipment damage or personal injury; the reliability and stability of the environmental vibration simulation of the machine tool under test are improved, and through precise control, real-time monitoring and adaptive adjustment, the simulation control system can maintain consistent performance during long-term operation, thereby reducing unexpected downtime and maintenance costs.

Description

Technical Field

[0001] The present invention relates to the technical field of simulation control, and in particular to a machine tool environment vibration simulation device and a control system based on an electric vibrator. Background Art

[0002] With the rapid development of the manufacturing industry, the requirements for machine tool processing accuracy and efficiency are getting higher and higher. However, in the actual working environment, machine tools are often affected by various ground vibrations, which can increase the processing errors of machine tools and even cause mechanical failures, so it is necessary to evaluate and improve the performance of machine tools in vibration environments. Electric vibrators are widely used in engineering, such as vibration experiments, structural dynamic analysis, material transportation and vibration compaction, especially in machine tool environmental vibration simulation. They can simulate various complex vibration environments, test and evaluate the performance and stability of machine tools, and ensure the accuracy and reliability of test results. However, most of them have not solved how to generate control signals through control instructions to drive the excitation module, and monitor the working status data of the excitation module to generate feedback information, and when it is identified whether there is an abnormality after adjustment based on the feedback information to perform safety protection.

[0003] For example, the Chinese patent application with the publication number CN118034189A discloses a control method for a multi-axis linkage servo control system of a CNC machine tool, and the control steps include: S1, connecting the main axis and the slave axis to a computer, and establishing a calculation and analysis model in the computer; S2, substituting the coordinate position of the workpiece into the calculation and analysis model, and calculating and analyzing the motion trajectory of the tool to adjust the transmission of the main axis and the slave axis; S3, the computer then controls the motion analysis of the main axis and the slave axis through an interpolation algorithm; S4, establishing a demonstration plan in the computer. The control system is properly adjusted in advance through the set calculation and analysis model and interpolation algorithm, and then a demonstration plan is established through the computer to simulate the processing state of the workpiece, check whether the workpiece reaches the processing level, improve the accuracy, avoid knowing the processing status of the workpiece after the workpiece is processed, make adjustments at the first time, avoid errors, and bring better prospects for use.

[0004] For example, a Chinese patent with authorization announcement number CN113552840B discloses a mechanical processing control system, which relates to the field of mechanical processing implementation monitoring technology, and solves the technical problems that the existing solutions have an incomplete fault detection range, and the abnormal state classification of CNC machine tools is unclear, resulting in the inability to properly adjust according to the abnormal state; it includes several CNC machine tools and a monitoring system for controlling several CNC machine tools, and the monitoring system includes a data acquisition module, a processor and an execution control module; by comparing and analyzing the processing parameter simulation curve and the processing parameter real-time curve, it is judged whether the operation of the CNC machine tool is abnormal, starting from the simulation, the actual operation is monitored, and the abnormalities of the CNC machine tool are divided into different types. When the operation is abnormal, adjustments are made through the preset processing parameters. When there is an operation failure, the operation is directly stopped and an early warning is issued. The abnormal state of the CNC machine tool is clearly divided to avoid automatic stopping when encountering an abnormality, which helps to improve the working efficiency of the CNC machine tool.

[0005] The above patents have the problems raised by this background technology: the control method of the multi-axis linkage servo control system of the above-mentioned CNC machine tool establishes a connection between the main axis and the slave axis with the computer, establishes a calculation and analysis model in the computer, substitutes the coordinate position of the workpiece into the calculation and analysis model, and calculates and analyzes the motion trajectory of the tool to adjust the transmission of the main axis and the slave axis. The computer then controls the motion analysis of the main axis and the slave axis through an interpolation algorithm, and establishes a demonstration plan in the computer to simulate the processing state of the workpiece to check whether the workpiece reaches the processing level and improves the accuracy; the above-mentioned mechanical processing control system judges whether the operation of the CNC machine tool is abnormal by comparing and analyzing the processing parameter simulation curve and the real-time processing parameter curve. Starting from the simulation, the actual operation is monitored, and the abnormalities of the CNC machine tool are divided into different types. When the operation is abnormal, it is adjusted through the preset processing parameters. When there is an operation failure, the operation is directly stopped and an early warning is issued. The abnormal state of the CNC machine tool is clearly divided to avoid automatic stop when encountering an abnormality. The above two patents do not solve the problem of how to generate control signals through control instructions to drive the excitation module, monitor the working status data of the excitation module to generate feedback information, and perform safety protection when it is identified whether there is an abnormality after adjustment based on the feedback information. To solve this problem, the present invention proposes a machine tool environment vibration simulation device and control system based on an electric exciter. Summary of the invention

[0006] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0007] In view of the above-mentioned problems existing in the existing machine tool environment vibration simulation device and control system based on the electric vibrator, the present invention is proposed.

[0008] Therefore, an object of the present invention is to provide a machine tool environment vibration simulation device and control system based on an electric vibrator.

[0009] In order to solve the above technical problems, the present invention provides a machine tool environment vibration simulation control system based on an electric vibrator, comprising: a signal generation module, a vibration excitation drive module, a feedback monitoring module and a safety protection module;

[0010] The signal generation module is used to generate a control signal according to the control instruction through a signal generation strategy;

[0011] The excitation drive module is used to amplify the control signal and drive the excitation module;

[0012] The feedback monitoring module is used to monitor the working status data of the machine tool under test and generate feedback information;

[0013] The safety protection module is used to identify the abnormal state adjusted according to the feedback information and perform safety protection according to the abnormal state.

[0014] As a preferred solution of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention, wherein: the control signal is generated according to the control instruction by the signal generation strategy, and the signal generation strategy includes:

[0015] Output a multi-mode signal according to a control instruction, configure the initial amplitude, initial frequency and initial phase of the multi-mode signal, dynamically adjust the multi-mode signal by the amplitude adjustment amount, frequency adjustment amount and phase adjustment amount in the control instruction to control the amplitude, frequency and phase of the multi-mode signal, and synthesize the adjusted amplitude, frequency and phase of the multi-mode signal to generate a control signal.

[0016] As a preferred solution of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention, the function expression of the control signal is as follows:

[0017] ;

[0018] In the formula, Indicates the control signal at time The value of Indicates the type of mode signal, Indicates The pattern signal in time The amplitude, represents pi, Indicates The pattern signal in time The frequency, Indicates The pattern signal in time The phase of represents the noise term.

[0019] As a preferred solution of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention, the logic of amplifying the control signal and driving the excitation module includes:

[0020] The control signal is received, and a driving signal is obtained after amplification and bias processing of the control signal. The X-axis exciter, Y-axis exciter and Z-axis exciter in the excitation module are driven respectively according to the driving signal. The X-axis exciter, Y-axis exciter and Z-axis exciter in the excitation module output vibrations according to the corresponding driving signals.

[0021] As a preferred solution of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention, wherein: monitoring the working state data of the machine tool under test, the working state data includes the acceleration and displacement of the machine tool under test, and the strategy for generating feedback information includes:

[0022] Configure the acceleration threshold and displacement threshold, compare the acceleration and displacement of the machine tool under test with the acceleration threshold and displacement threshold respectively to obtain feedback information. If the acceleration of the machine tool under test is less than the acceleration threshold and the displacement of the machine tool under test is less than the displacement threshold, the feedback information is not to adjust the control instruction;

[0023] If the acceleration of the machine tool under test is greater than or equal to the acceleration threshold, or the displacement of the machine tool under test is greater than or equal to the displacement threshold, the feedback information is an adjustment control instruction.

[0024] As a preferred solution of the machine tool environmental vibration simulation control system based on the electric vibrator described in the present invention, the logic of the adjustment control instruction includes: determining the amplitude adjustment amount, frequency adjustment amount and phase adjustment amount according to the acceleration and displacement of the machine tool under test, dynamically adjusting the amplitude, frequency and phase of the multi-mode signal according to the amplitude adjustment amount, frequency adjustment amount and phase adjustment amount, and dynamically adjusting the control signal and the drive signal.

[0025] As a preferred solution of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention, the function expression of the amplitude adjustment amount is as follows:

[0026] ;

[0027] In the formula, Indicates the amplitude adjustment amount, represents the speed adjustment factor, Indicates the time at which the machine tool under test The acceleration of represents the acceleration threshold, represents the amplitude adjustment factor, Indicates the time at which the machine tool under test The displacement of Indicates the displacement threshold.

[0028] As a preferred solution of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention, the logic of identifying the abnormal state adjusted according to the feedback information includes:

[0029] Monitor the amplitude of the control signal after adjusting the control command ,frequency and Phase , configure the amplitude threshold , frequency threshold and phase threshold , which controls the amplitude of the signal ,frequency and Phase Amplitude threshold , frequency threshold and phase threshold Compare and obtain the abnormal state adjusted according to the feedback information;

[0030] like and and , it means that there is no abnormality after adjustment according to the feedback information;

[0031] like or or , it means that there is an abnormality after adjustment based on the feedback information.

[0032] As a preferred solution of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention, when an abnormality exists after adjustment according to the feedback information, safety protection is performed according to the abnormal state, and the logic of performing safety protection includes:

[0033] like and , then perform emergency shutdown;

[0034] like or , then continue to compare the phase in the control signal with the phase threshold. If , a warning is issued;

[0035] like , then limit the operating range.

[0036] A machine tool environment vibration simulation device based on an electric vibrator includes: a vibration controller and a vibration excitation module;

[0037] The vibration controller is used to receive control instructions and generate control signals. The excitation module is used to receive the control signal generated by the vibration controller and obtain a driving signal after amplifying and biasing the control signal. The excitation module is provided with an X-axis exciter, a Y-axis exciter and a Z-axis exciter, and the X-axis exciter, the Y-axis exciter and the Z-axis exciter are driven according to the driving signal.

[0038] As a preferred solution of the machine tool environmental vibration simulation device based on the electric vibrator described in the present invention, the X-axis vibrator, the Y-axis vibrator and the Z-axis vibrator are respectively used to simulate the vibration of the machine tool under test in the X-axis, Y-axis and Z-axis directions.

[0039] The beneficial effects of the present invention are as follows: the present invention generates a control signal according to a control instruction through a signal generation strategy through a signal generation module, allowing a simulation control system to perform high-precision vibration simulation on a machine tool under test, thereby more accurately evaluating the performance of the machine tool under test in different vibration environments; the excitation drive module amplifies the control signal and drives the excitation module; the feedback monitoring module monitors the working status data of the machine tool under test and generates feedback information, which can understand the performance of the excitation module in real time and make adjustments as needed, thereby improving the accuracy and efficiency of the test; the safety protection module identifies the abnormal state adjusted according to the feedback information, and performs safety protection according to the abnormal state, and immediately executes safety protection measures once an abnormality is detected to prevent equipment damage or personal injury; the reliability and stability of the environmental vibration simulation of the machine tool under test are improved, and through precise control, real-time monitoring and adaptive adjustment, the simulation control system can maintain consistent performance during long-term operation, reducing unexpected downtime and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0041] Figure 1 It is a system structure diagram of the machine tool environment vibration simulation control system based on the electric vibrator of the present invention;

[0042] Figure 2 A flow chart of a feedback information generation strategy for a machine tool environment vibration simulation control system based on an electrodynamic vibrator according to the present invention;

[0043] Figure 3It is an overall structural diagram of the machine tool environment vibration simulation device based on the electric vibrator of the present invention;

[0044] Figure 4 This is a diagram of the excitation module of the machine tool environment vibration simulation device based on the electric vibrator of the present invention;

[0045] Figure 5 This is a practical application diagram of the machine tool environment vibration simulation device based on the electric vibrator of the present invention.

[0046] Reference numerals:

[0047] 1. Platform; 2. Vibration controller; 3. Excitation module; 4. Flexible support feet; 5. Machine tool under test; 31. X-axis exciter; 32. Y-axis exciter; 33. Z-axis exciter. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0050] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0051] Example 1

[0052] In this embodiment, a system structure diagram of a machine tool environment vibration simulation control system based on an electric vibrator is provided, such as Figure 1 As shown, the machine tool environment vibration simulation control system based on the electric vibrator includes a signal generation module, a vibration driving module, a feedback monitoring module and a safety protection module.

[0053] The signal generation module is used to generate a control signal according to a control instruction through a signal generation strategy.

[0054] The control signal is generated according to the control instruction through the signal generation strategy, and the signal generation strategy includes:

[0055] Output a multi-mode signal according to a control instruction, configure the initial amplitude, initial frequency and initial phase of the multi-mode signal, dynamically adjust the multi-mode signal by the amplitude adjustment amount, frequency adjustment amount and phase adjustment amount in the control instruction to control the amplitude, frequency and phase of the multi-mode signal, and synthesize the adjusted amplitude, frequency and phase of the multi-mode signal to generate a control signal.

[0056] The function expression for dynamically adjusting the multi-mode signal is as follows:

[0057] ;

[0058] ;

[0059] ;

[0060] In the formula, Indicates The pattern signal in time The amplitude, represents the initial amplitude, Indicates the amplitude adjustment in the control instruction. Indicates The pattern signal in time The frequency, represents the initial frequency, Indicates the frequency adjustment amount in the control instruction. Indicates The pattern signal in time The phase of represents the initial phase, Indicates the phase adjustment amount in the control command.

[0061] It should be explained that the amplitude, frequency and phase of each mode signal are adjusted through control instructions, thereby adjusting the strength, spectral characteristics and time synchronization of the multi-mode signal; the initial amplitude It refers to the initial amplitude value of the multi-mode signal without the influence of the control command, and also represents the basic strength of the multi-mode signal; the amplitude adjustment value in the control command Refers to the input signal that changes with time and is used to adjust the amplitude. It is usually a positive value. The initial frequency It refers to the natural frequency of the multi-mode signal without the influence of the control command; the frequency adjustment amount in the control command Refers to the frequency offset, which changes the frequency of the multi-mode signal through control instructions, thereby affecting the oscillation speed of the multi-mode signal. The value can be positive or negative to increase or decrease the frequency; initial phase It refers to the initial phase of the multi-mode signal without the influence of the control command; the phase adjustment amount in the control command Used to achieve real-time control of multi-mode signals, usually adjusted within a period range, such as between 0 and 2π or between -π and π.

[0062] The function expression of the control signal is as follows:

[0063] ;

[0064] In the formula, Indicates the control signal at time The value of Indicates the type of mode signal, Indicates The pattern signal in time The amplitude, represents pi, Indicates The pattern signal in time The frequency, Indicates The pattern signal in time The phase of represents the noise term.

[0065] What needs to be explained is: the noise term It is used to simulate environmental interference or other random factors in the control signal. The specific form usually depends on the type and characteristics of the noise. The value is usually determined by the intensity and type of the noise. It reflects the inevitable interference in reality, such as electronic equipment noise and environmental disturbances, which increases the complexity of the control signal.

[0066] The control instruction is converted from the received user input, and a multi-mode signal is output according to the control instruction. In order to simulate a more complex vibration environment, the multi-mode signal needs to be synthesized to test the machine tool 5 under test. Here, the amplitude, frequency and phase of the multi-mode signal are dynamically adjusted by the amplitude adjustment amount, frequency adjustment amount and phase adjustment amount in the control instruction, and then the adjusted amplitude, frequency and phase of the multi-mode signal are synthesized to finally obtain the control signal, and the amplitude, frequency and phase of each mode signal can be adjusted independently. By synthesizing the multi-mode signal, the shape of the control signal can be accurately adjusted, and complex vibrations can be constructed, which is helpful to simulate the vibration environment of the machine tool 5 under test.

[0067] The excitation drive module is used to amplify the control signal and drive the excitation module 3.

[0068] The logic for amplifying the control signal and driving the excitation module 3 includes:

[0069] The control signal is received, and a driving signal is obtained after amplification and bias processing of the control signal. The X-axis exciter 31, the Y-axis exciter 32 and the Z-axis exciter 33 in the excitation module 3 are driven respectively according to the driving signal. The X-axis exciter 31, the Y-axis exciter 32 and the Z-axis exciter 33 in the excitation module 3 vibrate and output according to the corresponding driving signal.

[0070] The function expression of the driving signal is as follows:

[0071] ;

[0072] ;

[0073] ;

[0074] In the formula, Indicates the X-axis exciter 31 at time The driving signal, Indicates the amplification factor of the control signal in the X-axis direction, Indicates the control signal at time The value of Indicates the offset of the control signal in the X-axis direction. Indicates the Y-axis exciter 32 at time The driving signal, Indicates the amplification factor of the control signal in the Y-axis direction, Indicates the offset of the control signal in the Y-axis direction. Indicates the Z-axis exciter 33 at time The driving signal, Indicates the amplification factor of the control signal in the Z-axis direction, Indicates the offset of the control signal in the Z-axis direction.

[0075] What needs to be explained is: the amplification factor of the control signal in the X-axis direction Used to adjust the amplification degree of the control signal in the X-axis direction and the amplification factor of the control signal in the Y-axis direction Used to adjust the amplification degree of the control signal in the Y-axis direction and the amplification factor of the control signal in the Z-axis direction It is used to adjust the amplification degree of the control signal in the Z-axis direction, which determines the gain or response strength of the control signal in each axis. The values ​​of these amplification factors are usually positive real numbers; the bias of the control signal in the X-axis direction Used to adjust the constant offset of the control signal in the X-axis direction and the offset of the control signal in the Y-axis direction Used to adjust the constant offset of the control signal in the Y-axis direction and the offset of the control signal in the Z-axis direction It is used to adjust the constant offset of the control signal in the Z-axis direction to ensure that the drive signal can maintain a suitable zero offset in some cases. For example, the drive signal is not allowed to take negative values ​​to avoid the excitation module 3 working in reverse. These offsets are usually real numbers and need to be adjusted reasonably according to actual needs to avoid excessive offsets that cause instability in the analog control system.

[0076] The control signal from the signal generation module is received. The control signal represents the synthetic output of the multi-mode signal and is the control source of the analog excitation module 3. However, the power is low, so the control signal needs to be amplified to a level sufficient to drive the excitation module 3. Here, the control signal is amplified and biased to obtain driving signals in the X-axis, Y-axis and Z-axis directions respectively to ensure that the control signal is suitable for driving the excitation module 3. Since the excitation module 3 may require different signal strengths in different directions, different amplification factors and biases are applied to the control signals in the X-axis, Y-axis and Z-axis directions to avoid the driving signal falling within an inappropriate range. According to these driving signals, the X-axis exciter 31, the Y-axis exciter 32 and the Z-axis exciter 33 in the excitation module 3 are independently driven to generate the vibration response of the multi-axis exciter of the excitation module 3, ensuring that the vibration of the excitation module 3 in all directions meets the expectations, avoiding the adverse effects caused by excessively large or small driving signals, and thus being able to efficiently test the response of the machine tool 5 under test, realize accurate vibration testing and control, thereby simulating the vibration environment of the machine tool 5 under test, ensuring the smooth operation of the simulation control system, and minimizing energy loss, thereby improving the testing accuracy and efficiency of the simulation control system on the machine tool 5 under test.

[0077] The feedback monitoring module is used to monitor the working status data of the machine tool 5 under test and generate feedback information.

[0078] Monitor the working status data of the machine tool 5 under test, the working status data includes the acceleration and displacement of the machine tool 5 under test, and generate feedback information as follows: Figure 2 As shown, specifically including:

[0079] Configure the acceleration threshold and the displacement threshold, compare the acceleration and displacement of the machine tool 5 under test with the acceleration threshold and the displacement threshold respectively to obtain feedback information, if the acceleration of the machine tool 5 under test is less than the acceleration threshold and the displacement of the machine tool 5 under test is less than the displacement threshold, the feedback information is not to adjust the control instruction;

[0080] If the acceleration of the machine tool 5 under test is greater than or equal to the acceleration threshold, or the displacement of the machine tool 5 under test is greater than or equal to the displacement threshold, the feedback information is an adjustment control instruction.

[0081] The logic of adjusting the control instruction includes: determining the amplitude adjustment amount, frequency adjustment amount and phase adjustment amount according to the acceleration and displacement of the machine tool 5 under test, dynamically adjusting the amplitude, frequency and phase of the multi-mode signal according to the amplitude adjustment amount, frequency adjustment amount and phase adjustment amount, and dynamically adjusting the control signal and the drive signal.

[0082] The function expressions for adjusting the amplitude, frequency, and phase of a multi-mode signal are as follows:

[0083] ;

[0084] ;

[0085] ;

[0086] In the formula, Indicates that after adjustment at time The amplitude, Indicates The pattern signal in time The amplitude, Indicates the amplitude adjustment amount, Indicates that after adjustment at time The frequency, Indicates The pattern signal in time The frequency, Indicates the frequency adjustment amount, Indicates that after adjustment at time The phase of Indicates The pattern signal in time The phase of Indicates the phase adjustment amount.

[0087] The function expression of the amplitude adjustment is as follows:

[0088] ;

[0089] In the formula, Indicates the amplitude adjustment amount, represents the speed adjustment factor, Indicates that the machine tool 5 under test is at time The acceleration of represents the acceleration threshold, represents the amplitude adjustment factor, Indicates that the machine tool 5 under test is at time The displacement of Indicates the displacement threshold.

[0090] What needs to be explained is: speed adjustment factor It is used to control the influence of acceleration feedback on amplitude adjustment, and determines the contribution ratio of acceleration feedback of the tested machine tool 5 to amplitude adjustment. The larger the value, the more significant the influence of acceleration feedback on amplitude adjustment. The value range is between 0 and 1. Refers to the maximum safe acceleration set; amplitude adjustment factor It is used to control the influence of displacement feedback on amplitude adjustment, and determines the contribution ratio of displacement feedback of the machine tool 5 under test to amplitude adjustment. The larger the value, the more significant the influence of displacement feedback on amplitude adjustment. The value range is between 0 and 1. Displacement threshold Refers to the maximum allowable displacement set.

[0091] The function expression of the frequency adjustment amount is as follows:

[0092] ;

[0093] In the formula, Indicates the frequency adjustment amount, represents the speed adjustment factor, Indicates that the machine tool 5 under test is at time The acceleration of represents the acceleration threshold, represents the bit-frequency adjustment factor, Indicates that the machine tool 5 under test is at time The displacement of Indicates the displacement threshold.

[0094] What needs to be explained is: speed adjustment factor It is used to control the influence of acceleration feedback on frequency adjustment, and determines the contribution ratio of acceleration feedback of the tested machine tool 5 to frequency adjustment. The larger the value, the more significant the influence of acceleration feedback on frequency adjustment. The value range is between 0 and 1. It is used to control the influence of displacement feedback on frequency adjustment, and determines the contribution ratio of displacement feedback of the machine tool 5 under test to frequency adjustment. The larger the value, the more significant the influence of displacement feedback on frequency adjustment. The value range is between 0 and 1.

[0095] The functional expression of the phase adjustment amount is as follows:

[0096] ;

[0097] In the formula, Indicates the phase adjustment amount, represents the speed phase adjustment factor, Indicates that the machine tool 5 under test is at time The acceleration of represents the acceleration threshold, represents the phase adjustment factor, Indicates that the machine tool 5 under test is at time The displacement of Indicates the displacement threshold.

[0098] What needs to be explained is: speed phase adjustment factor It is used to control the influence of acceleration feedback on phase adjustment, and determines the contribution ratio of acceleration feedback of the tested machine tool 5 to phase adjustment. The larger the value, the more significant the influence of acceleration feedback on phase adjustment. The value range is between 0 and 1. Phase adjustment factor It is used to control the influence of displacement feedback on phase adjustment, and determines the contribution ratio of displacement feedback of the machine tool 5 under test to phase adjustment. The larger the value, the more significant the influence of displacement feedback on phase adjustment. The value range is between 0 and 1.

[0099] It is necessary to monitor the actual working status data of the machine tool 5 under test, including the acceleration and displacement of the machine tool 5 under test in the vibration environment, and generate feedback information to the signal generation module and the excitation drive module to determine whether the control instruction needs to be adjusted. At the same time, the control signal is adjusted. By taking the absolute values ​​of acceleration and displacement, the influence of the acceleration and displacement direction is eliminated, and only the magnitude of acceleration and displacement is concerned. The control signal and the drive signal are synchronously adjusted according to the amplitude, frequency and phase of the adjusted multi-mode signal, and then the vibration response of the multi-axis exciter in the excitation module 3 is adjusted to accurately simulate the vibration environment of the machine tool 5 under test after adjustment, so as to carry out subsequent tests and restore the multi-axis exciter in the excitation module 3 to the optimal operating state.

[0100] The safety protection module is used to identify the abnormal state adjusted according to the feedback information and perform safety protection according to the abnormal state.

[0101] The logic for identifying abnormal states adjusted based on feedback information includes:

[0102] Monitor the amplitude of the control signal after adjusting the control command ,frequency and Phase , configure the amplitude threshold , frequency threshold and phase threshold , which controls the amplitude of the signal ,frequency and Phase Amplitude threshold , frequency threshold and phase threshold Compare and obtain the abnormal state adjusted according to the feedback information;

[0103] like and and , it means that there is no abnormality after adjustment according to the feedback information;

[0104] like or or , it means that there is an abnormality after adjustment based on the feedback information.

[0105] When an abnormality exists after adjustment according to the feedback information, safety protection is performed according to the abnormal state. The logic for performing safety protection includes:

[0106] like and , then perform emergency shutdown;

[0107] like or , then continue to compare the phase in the control signal with the phase threshold. If , a warning is issued;

[0108] like , then limit the operating range.

[0109] In actual situations, it is necessary to ensure that the analog control system can perform safety protection under abnormal circumstances. The amplitude, frequency and phase in the control signal after monitoring and adjusting the control instructions are compared with the corresponding thresholds to determine whether the corresponding amplitude, frequency and phase are abnormal. When the corresponding amplitude, frequency and phase are not abnormal, it means that there is no abnormality after adjustment according to the feedback information. When any of the corresponding amplitude, frequency and phase is abnormal, it means that there is an abnormality after adjustment according to the feedback information. At this time, it is necessary to judge the degree of abnormality in order to perform the corresponding safety protection. When the corresponding amplitude and frequency are abnormal at the same time, it means that the analog control system is close to an extremely unstable state, and the key parameters of the signal are beyond the safe range. All signals must be restricted immediately, especially the amplitude and frequency, and an emergency shutdown must be performed immediately; when any of the corresponding amplitude and frequency is abnormal, it is necessary to further determine whether the corresponding phase is abnormal. When there is no abnormality in the phase, the abnormality is not beyond the safe range. It is necessary to adjust the key parameters of the load and signal of the analog control system through a warning. When the abnormality still exists and continues after adjusting the key parameters of the load and signal of the analog control system, an emergency shutdown must be performed; when the phase is abnormal, it indicates that the analog control system may be at risk of instability, so it is necessary to limit the operating range, including but not limited to limiting the operating frequency amplitude adjustment and phase compensation. When the abnormality still exists and continues after limiting the operating range, an emergency shutdown must be performed.

[0110] Example 2

[0111] In this embodiment, the overall structure diagram of the machine tool environment vibration simulation device based on the electric vibrator is provided, such as Figure 3 As shown, the machine tool environment vibration simulation device based on the electric vibrator includes:

[0112] Platform 1, vibration controller 2, excitation module 3 and soft supporting feet 4.

[0113] The vibration controller 2 is used to receive control instructions and generate control signals. The excitation module 3 is used to receive the control signal generated by the vibration controller 2, and obtain a driving signal after amplifying and biasing the control signal. The excitation module 3 is provided with an X-axis exciter 31, a Y-axis exciter 32 and a Z-axis exciter 33. The X-axis exciter 31, the Y-axis exciter 32 and the Z-axis exciter 33 are driven according to the driving signal to simulate the vibration of the machine tool 5 under test in the X-axis, Y-axis and Z-axis directions respectively.

[0114] like Figure 5 As shown, in a specific application, the platform 1 is used to place the machine tool 5 under test, and usually has sufficient strength and stability to support the machine tool 5 under test and the vibration generated during the test. It is necessary to ensure that a stable working environment is provided to reduce the impact of external vibrations on the test process.

[0115] The vibration controller 2 is used to receive control instructions and generate control signals to drive the excitation module 3 to simulate the vibration environment of the machine tool 5 under test.

[0116] The excitation module 3 is used to receive the control signal generated by the vibration controller 2, and obtain the driving signal after amplifying and biasing the control signal to generate multi-axial vibration;

[0117] like Figure 4 As shown, the excitation module 3 includes an X-axis exciter 31 , a Y-axis exciter 32 and a Z-axis exciter 33 .

[0118] The X-axis vibration exciter 31 is used to simulate the vibration of the machine tool 5 under test in the X-axis direction;

[0119] The Y-axis exciter 32 is used to simulate the vibration of the machine tool 5 under test in the Y-axis direction;

[0120] The Z-axis vibration exciter 33 is used to simulate the vibration of the machine tool 5 under test in the Z-axis direction.

[0121] The soft support legs 4 are used to support the platform 1 and are usually made of flexible materials to absorb and isolate vibrations from the ground, thereby reducing interference with the test results of the machine tool 5 under test, providing a seismic isolation effect, and ensuring the stability of the platform 1.

[0122] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A machine tool environment vibration simulation control system based on an electric vibrator, characterized in that: include: Signal generation module, excitation drive module, feedback monitoring module and safety protection module; The signal generation module is used to generate a control signal according to the control instruction through a signal generation strategy; The control signal is generated according to the control instruction by the signal generation strategy, and the signal generation strategy includes: Outputting a multi-mode signal according to a control instruction, configuring an initial amplitude, an initial frequency and an initial phase of the multi-mode signal, dynamically adjusting the multi-mode signal by an amplitude adjustment amount, a frequency adjustment amount and a phase adjustment amount in the control instruction to control the amplitude, frequency and phase of the multi-mode signal, and synthesizing the adjusted amplitude, frequency and phase of the multi-mode signal to generate a control signal; The excitation drive module is used to amplify the control signal and drive the excitation module (3); Receive a control signal, and obtain a driving signal after amplifying and biasing the control signal; The feedback monitoring module is used to monitor the working status data of the machine tool (5) under test and generate feedback information; Monitoring working status data of the machine tool under test (5), wherein the working status data includes acceleration and displacement of the machine tool under test (5), and a strategy for generating feedback information includes: configuring an acceleration threshold and a displacement threshold, comparing the acceleration and displacement of the machine tool (5) under test with the acceleration threshold and the displacement threshold respectively to obtain feedback information, and if the acceleration of the machine tool (5) under test is less than the acceleration threshold and the displacement of the machine tool (5) under test is less than the displacement threshold, the feedback information is not to adjust the control instruction; If the acceleration of the machine tool under test (5) is greater than or equal to the acceleration threshold, or the displacement of the machine tool under test (5) is greater than or equal to the displacement threshold, the feedback information is an adjustment control instruction; The logic of the adjustment control instruction includes: determining an amplitude adjustment amount, a frequency adjustment amount and a phase adjustment amount according to the acceleration and displacement of the machine tool (5) under test, dynamically adjusting the amplitude, frequency and phase of the multi-mode signal according to the amplitude adjustment amount, the frequency adjustment amount and the phase adjustment amount, and dynamically adjusting the control signal and the drive signal; The safety protection module is used to identify the abnormal state adjusted according to the feedback information and perform safety protection according to the abnormal state.

2. The machine tool environment vibration simulation control system based on an electrodynamic vibrator as claimed in claim 1, characterized in that: The function expression of the control signal is as follows: ； In the formula, Indicates the control signal at time The value of Indicates the type of mode signal, Indicates The pattern signal in time The amplitude, represents pi, Indicates The pattern signal in time The frequency, Indicates The pattern signal in time The phase of represents the noise term.

3. The machine tool environment vibration simulation control system based on an electrodynamic vibrator as claimed in claim 2, characterized in that: The logic for amplifying the control signal and driving the excitation module (3) includes: A control signal is received, and the control signal is amplified and biased to obtain a driving signal, and an X-axis vibrator (31), a Y-axis vibrator (32) and a Z-axis vibrator (33) in the vibration module (3) are driven respectively according to the driving signal, and the X-axis vibrator (31), the Y-axis vibrator (32) and the Z-axis vibrator (33) in the vibration module (3) perform vibration output according to the corresponding driving signal.

4. The machine tool environment vibration simulation control system based on an electrodynamic vibrator as claimed in claim 3, characterized in that: The function expression of the amplitude adjustment amount is as follows: ； In the formula, Indicates the amplitude adjustment amount, represents the speed adjustment factor, Indicates the time at which the machine tool under test (5) The acceleration of represents the acceleration threshold, represents the amplitude adjustment factor, Indicates the time at which the machine tool under test (5) The displacement of Indicates the displacement threshold.

5. The machine tool environment vibration simulation control system based on an electrodynamic vibrator as claimed in claim 4, characterized in that: The logic of identifying the abnormal state adjusted according to the feedback information includes: Monitor the amplitude of the control signal after adjusting the control command ,frequency and Phase , configure the amplitude threshold , frequency threshold and phase threshold , which controls the amplitude of the signal ,frequency and Phase Amplitude threshold , frequency threshold and phase threshold Compare and obtain the abnormal state adjusted according to the feedback information; like and and , it means that there is no abnormality after adjustment according to the feedback information; like or or , it means that there is an abnormality after adjustment based on the feedback information.

6. The machine tool environment vibration simulation control system based on an electrodynamic vibrator as claimed in claim 5, characterized in that: When an abnormality exists after adjustment according to the feedback information, safety protection is performed according to the abnormal state. The logic for performing safety protection includes: like and , then perform emergency shutdown; like or , then continue to compare the phase in the control signal with the phase threshold. If , a warning is issued; like , then limit the operating range.

7. A machine tool environment vibration simulation device based on an electrodynamic vibrator, using the machine tool environment vibration simulation control system based on an electrodynamic vibrator according to any one of claims 1 to 6, characterized in that: include: A vibration controller (2) and an excitation module (3); The vibration controller (2) is used to receive control instructions and generate control signals. The excitation module (3) is used to receive the control signal generated by the vibration controller (2) and obtain a drive signal after amplifying and biasing the control signal. The excitation module (3) is provided with an X-axis exciter (31), a Y-axis exciter (32) and a Z-axis exciter (33). The X-axis exciter (31), the Y-axis exciter (32) and the Z-axis exciter (33) are driven according to the drive signal.

8. The machine tool environment vibration simulation device based on an electrodynamic vibrator as claimed in claim 7, characterized in that: The X-axis vibration exciter (31), the Y-axis vibration exciter (32) and the Z-axis vibration exciter (33) are respectively used to simulate the vibration of the machine tool (5) under test in the directions of the X-axis, the Y-axis and the Z-axis.

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