Method and system for controlling optimal oil temperature of sliding table of multi-comprehensive vibration test system

Abstract

The invention discloses an optimal oil temperature control method and system for a sliding table of a multi-comprehensive vibration test system, and belongs to the technical field of vibration tables. The problems that an existing sliding table oil temperature control surface is lagged in response, insufficient in precision and high in energy consumption during high-low temperature alternating of a test cavity are solved. The method comprises the steps that the actual temperature of an oil return port is collected, and closed-loop power is generated through PID according to the deviation between the actual temperature and the given optimal temperature; the curve area in the future time period is calculated according to the ideal temperature curve of the test cavity every fixed time interval, and the compensation power is determined by comparing the curve area with the optimal working temperature threshold area of oil; and the closed-loop power and the compensation power are superposed, and are processed by a power threshold function to generate real-time power to drive a test cabin inner wall adjusting device. Closed-loop feedback and feedforward compensation based on curve area are combined, thermal disturbance is actively inhibited, the oil temperature is stabilized in the optimal interval, and the control precision and the response speed are improved; the power threshold function avoids frequent start and stop of an execution mechanism, reduces energy consumption and prolongs the service life.

Description

Technical Field

[0001] This invention relates to the field of vibration table technology, and in particular to a method and system for optimal oil temperature control of a slide table in a multi-integrated vibration test system. Background Technology

[0002] Multi-stage vibration testing systems are composite testing equipment that integrates vibration excitation with environmental factors such as temperature, humidity, and air pressure. They are widely used in product reliability verification in fields such as aerospace, automotive, and rail transportation. The slide table is a key auxiliary device in the vibration testing system, primarily used to extend the system's functionality and enable horizontal vibration testing of the test piece. It typically employs hydrostatic guide rail support, allowing the slide table surface to slide horizontally on the base with low friction. Oil temperature, by affecting oil viscosity, directly impacts the slide table's lubrication effect, load-bearing pressure, operational control accuracy, and component lifespan.

[0003] However, the test chamber of a multi-stage vibration test system is often subjected to extreme environments with alternating high and low temperatures. These temperature changes directly exchange heat with the oil beneath the slide, causing the oil temperature to fluctuate wildly and deviate from the ideal operating range. Current methods for controlling the slide oil typically involve monitoring the real-time oil temperature and dynamically adjusting it through heating or cooling. However, this approach often suffers from slow response times and lag, and is generally suitable for situations where oil temperature changes are relatively small. For multi-stage vibration test systems, where the test chamber temperature often covers a wide range, fluctuates significantly, and changes rapidly, existing oil temperature control methods struggle to respond quickly to temperature changes within the test chamber. This results in the slide oil temperature deviating severely from the ideal operating range during operation, affecting vibration test results and the reliability of the equipment. Therefore, controlling the slide oil temperature in multi-stage vibration test systems has become a critical challenge that urgently needs to be addressed. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems in the prior art and provide a method and system for optimal oil temperature control of a slide table in a multi-integrated vibration test system. This invention obtains the closed-loop regulating power by collecting the actual temperature of the slide table oil. The compensation adjustment power is periodically calculated and updated based on the ideal temperature curve of the test chamber. The two are superimposed and processed by the power threshold function to drive the temperature regulation device. Combined with the corresponding control system, this solves the problems of oil temperature fluctuation caused by the alternation of high and low temperatures in the test chamber, slow response of existing control, low accuracy, and high energy consumption. It achieves stable oil temperature in the optimal range, ensures the performance of the slide table and the reliability of test data, and reduces energy consumption.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: a method for optimal oil temperature control of a slide table in a multi-integrated vibration test system, comprising the following steps:

[0006] Step S1: Set the optimal temperature for the slide oil. A temperature sensor is installed at the return port of the slide table to collect the actual temperature of the slide table oil. The regulating power value of the slide table oil temperature regulating device is defined as a positive value indicating heating and a negative value indicating cooling. The deviation between the set temperature and the actual temperature of the slide table oil is calculated, and this deviation is input into the closed-loop control algorithm to calculate the closed-loop regulating power of the slide table oil temperature regulating device. ;

[0007] Step S2: After the experiment begins, at each interval... The time is calculated based on the ideal temperature change curve of the test chamber, and the compensation adjustment power of the slide oil temperature regulating device is updated once. , The initial value is 0;

[0008] Step S3: Close the power of the slide oil temperature regulating device. Power compensation adjustment with slide oil temperature regulating device Adding them together, we get the total regulating power of the slide oil temperature regulating device. ,Right now ;

[0009] Step S4: Calculate the total regulating power of the slide oil temperature regulating device. After passing through the power threshold function, the real-time adjustable power is generated, which in turn drives the slide oil temperature regulating device to work, so that the slide oil temperature is stabilized in the optimal working range.

[0010] Furthermore, in step S1, the closed-loop control algorithm employs a PID control algorithm. The PID control algorithm comprehensively utilizes the proportional, integral, and derivative information of the temperature deviation to achieve more precise and stable correction of the temperature deviation. This helps eliminate static errors and suppress temperature fluctuations caused by sudden disturbances, providing a reliable basic adjustment capability for the entire control system.

[0011] Furthermore, in step S2, the slide oil temperature regulating device compensates for the power adjustment. The update methods include:

[0012] S21. Record the ideal temperature change curve of the test chamber as follows: Independent variable Time, in minutes; dependent variable The temperature of the test chamber is expressed in degrees Celsius; the minimum allowable operating temperature of the test chamber is denoted as . ; Ideal temperature change curve of the test chamber By taking the derivative, the slope of the ideal temperature change curve of the experimental chamber can be obtained. ;

[0013] S22, Record the current update time as... ,in Indicates the first The next update, the value is... ; Calculate from time Until time Area of ​​the ideal temperature curve of the test chamber within the range ;

[0014] S23. Based on the area of ​​the ideal temperature curve of the test chamber obtained. Combined with the upper limit area of ​​the optimal operating temperature threshold of the oil Area of ​​the lower limit of the optimal operating temperature threshold of the oil Oil surface area at optimal temperature Calculate the compensation and adjustment power of the slide oil temperature regulating device. This method of calculating compensation based on the area enclosed by the ideal temperature curve over a future time period transforms the temperature change trend in the test plan into a quantifiable energy demand forecast. This makes feedforward compensation no longer a simple follow-up, but a proactive energy management strategy with foresight, allowing the oil temperature regulation to better match the future state of the test chamber.

[0015] Further, in step S22, the area of ​​the ideal temperature curve of the test chamber... The calculation method has two cases:

[0016] a: If we consider time Until time Slope of the ideal temperature change curve of the test chamber within the range If no change occurs, then the area of ​​the ideal temperature curve in the test chamber is... The calculation formula is:

[0017]

[0018] in: express The ideal temperature value corresponding to that moment. for The ideal temperature value corresponding to that moment;

[0019] b: If we consider time Until time Slope of the ideal temperature change curve of the test chamber within the range If a change occurs, then the interval will be... The changes are divided into the following categories: Section, Record The start time of the segment interval is , No. The end time of the segment interval is , The value is The area of ​​the ideal temperature curve in the test chamber is then... The calculation formula is:

[0020]

[0021] in: for The ideal temperature value corresponding to that moment; for The ideal temperature value corresponding to each moment. For complex situations such as varying rates of heating and cooling or constant temperature in the test temperature curve, this piecewise area calculation method can more accurately fit the actual temperature history, ensuring the accuracy of energy demand prediction. This allows the calculation of compensation power to adapt to various nonlinear test temperature change curves, enhancing the method's universality and robustness.

[0022] Further, in step S23 , and The calculation formula is:

[0023]

[0024] in, The upper limit of the optimal operating temperature threshold for hydraulic fluid. The lower limit of the optimal operating temperature threshold for the oil; the power compensation adjustment of the slide table oil temperature regulating device. The method for determining it is as follows:

[0025] like If no power compensation is performed, the compensation will be adjusted. ;

[0026] like Then, cooling power compensation is performed, and the compensation adjustment power is adjusted. ,in: This is the maximum cooling power of the slide oil temperature regulating device, and its value is negative.

[0027] like Then, heating power compensation is performed, and the compensation adjustment power is adjusted. ,in: This represents the maximum heating power of the slide table oil temperature control device, and its value is a positive number. By comparing the calculated area with an area threshold defined based on the normal operating temperature range of the oil, it can intelligently determine whether compensation is needed and the direction of compensation, and limit the output based on the maximum capacity of the equipment. This mechanism ensures that sufficient adjustment can be applied in advance when a significant temperature deviation risk is predicted, while avoiding unnecessary or excessive compensation actions, thus ensuring the effectiveness and safety of the compensation behavior.

[0028] Furthermore, in step S4, after passing through the power threshold function, the real-time adjustable power is generated, satisfying the following condition:

[0029] like or , If the coefficient is the power threshold function coefficient, then the real-time adjustment power is 0;

[0030] like or Then the power is adjusted in real time. ;

[0031] like Then the power is adjusted in real time. ;

[0032] like Then the power is adjusted in real time. The introduction of a power threshold function sets a small "dead zone" and a clear upper limit for the total regulating power. This prevents the actuator from frequently and unnecessarily switching near zero due to minor fluctuations or noise in the calculated signal, thus improving equipment lifespan and system stability. Simultaneously, hard limiting protection ensures that the output power never exceeds the actuator's safe operating range, guaranteeing hardware safety.

[0033] Furthermore, the oil is given an optimal temperature. The value range is 30℃~50℃, and the interval time is... The value range is 5 min to 10 min. Setting the optimal operating temperature of the oil within this range helps maintain good viscosity and lubrication characteristics of the oil under most operating conditions. Setting the compensation power update interval to 5 to 10 minutes ensures that the feedforward compensation can respond to changes in the test process in a timely manner, while avoiding the increase in system computational load and possible output command oscillation caused by excessively frequent updates, thus finding a better balance between response speed and system stability.

[0034] Furthermore, the minimum permissible operating temperature of the test chamber The value range is -100℃ to -60℃, which is the upper limit of the optimal operating temperature threshold for the oil. The value range is 40℃~50℃, and the lower limit of the optimal operating temperature threshold for the oil is... The values ​​range from 5℃ to 10℃. Clearly defining the typical ranges for these key temperature parameters allows the control method to cover a wide range of test environments, from extreme low temperatures to ambient temperatures. Setting clear safety boundaries for the oil temperature in the compensation algorithm ensures that, under various harsh test conditions, the system can maintain the oil temperature within an ideal operating window that is both efficient and does not damage the equipment.

[0035] Furthermore, the power threshold function coefficients The value ranges from 0.1 to 0.15. This empirical range of coefficients effectively filters out invalid control signals that are usually caused by measurement noise or minor disturbances, thereby significantly reducing invalid actions of the actuator. At the same time, this "dead zone" is not so large as to affect the system's rapid response to true and valid temperature deviations, achieving a good trade-off between suppressing jitter and maintaining control sensitivity.

[0036] The present invention also provides a dynamic control system for the slide oil temperature of a multi-integrated vibration test system, the system including a temperature sensor, an oil temperature regulating device and a control unit;

[0037] The temperature sensor is installed at the oil return port of the slide table to detect the real-time temperature of the slide table oil and transmit the detected temperature signal to the control unit.

[0038] The oil temperature regulating device is arranged on the inner wall of the test chamber below the slide table, and is used to receive control signals sent by the control unit to heat or cool the slide table oil.

[0039] The control unit is electrically connected to the temperature sensor and the oil temperature regulation device via a data cable. It integrates the aforementioned control method, receiving temperature signals from the temperature sensor, calculating real-time regulation power, and sending control signals to the oil temperature regulation device. This control system achieves uniform and efficient heat exchange by placing the temperature sensor at the key loop point (oil return port) that best represents the oil state after system operation, and by arranging the temperature regulation device around the inner wall of the test chamber. This provides an optimized hardware foundation for the precise execution of the aforementioned control method. The dedicated control unit carries intelligent control algorithms, enabling the entire system to work collaboratively. It effectively translates the advantages of combining predictive feedforward compensation and closed-loop feedback regulation into rapid, accurate, and stable oil temperature control capabilities in actual equipment.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] 1. This invention employs a dual control mode combining closed-loop control of the slide table oil temperature and predictive compensation adjustment of the test chamber temperature. This effectively suppresses temperature conduction interference caused by alternating high and low temperatures in the test chamber during multi-vibration tests, ensuring that the slide table oil temperature can be stably controlled within the ideal working range of 30℃ to 50℃. This effectively avoids abnormal increases or decreases in oil viscosity due to drastic temperature fluctuations, providing a stable and suitable lubrication medium environment for the slide table guide rail pair. Consequently, it ensures the slide table's motion accuracy, reduces guide rail pair wear, extends the slide table's service life, and provides a reliable guarantee for the accuracy of test data.

[0042] 2. By introducing the ideal temperature change curve of the test chamber, the compensation adjustment power of the slide table oil temperature adjustment device is calculated and updated at fixed time intervals. This allows for the prediction of the influence trend of the test chamber temperature change on the slide table oil temperature in advance, and the accurate generation of heating or cooling compensation adjustment power based on this trend. This enables the system to proactively and quickly respond to disturbances caused by sudden temperature changes in the test chamber, effectively solving the problem of lag in response of existing single closed-loop control. It significantly improves the accuracy and speed of slide table oil temperature control, ensuring that the oil temperature returns to the optimal range in a timely manner, and adapting to the complex scenario of alternating high and low temperatures in the test chamber.

[0043] 3. By using the area of ​​the ideal temperature change curve of the test chamber within a fixed time interval as the calculation basis, the overall temperature change of the test chamber within that time period can be comprehensively reflected. This effectively avoids the problems of temperature alternation misjudgment and frequent oil temperature fluctuations caused by the randomness of single-point signals when using temperature signals at specific time points for prediction in traditional methods. It more accurately captures the temperature change pattern and trend of the test chamber, providing reliable support for the accurate calculation of compensation and adjustment power, further improving the temperature prediction and compensation effect, and ensuring stable oil temperature.

[0044] 4. By setting a reasonable power threshold function to generate real-time adjustment power, the effective range of adjustment power is clearly distinguished. The oil temperature adjustment device is only activated for real-time adjustment when the adjustment power reaches the set threshold. This effectively avoids frequent start-stop and over-adjustment of the adjustment device when the oil temperature deviation is small. It reduces secondary fluctuations in oil temperature caused by frequent adjustments, lowers the energy consumption of the adjustment device, reduces equipment wear, extends the service life of the temperature adjustment device, and takes into account both the stability and economy of temperature control. Attached Figure Description

[0045] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0046] Figure 1 The overall principle diagram of the dynamic oil temperature regulation method of the present invention.

[0047] Figure 2 This is a cross-sectional view of the multi-integrated vibration test system of the present invention.

[0048] Figure 3 This is a flowchart illustrating the power compensation adjustment process of the oil temperature regulating device of the present invention.

[0049] Figure 4 This is a schematic diagram for calculating the area of ​​an ideal temperature curve under the condition that the slope remains unchanged.

[0050] Figure 5 This is a schematic diagram for calculating the area of ​​an ideal temperature curve under varying slope conditions.

[0051] The attached diagram is labeled as follows: 1. Slide table surface; 2. T-shaped guide rail; 3. Temperature sensor; 4. Slide table oil separator; 5. Test chamber; 6. Oil temperature regulating device. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0053] like Figure 1 and Figure 3 As shown, this application provides a method for optimal oil temperature control of a slide table in a multi-integrated vibration test system, comprising the following steps:

[0054] Step S1: Set the optimal temperature for the slide oil. (Value range: 30℃~50℃) A temperature sensor is installed at the return port of the slide table to collect the actual temperature of the slide table oil. The regulating power value of the slide table oil temperature regulating device is defined as a positive number indicating the heating state and a negative number indicating the cooling state. The deviation between the given temperature and the actual temperature of the slide table oil is calculated, and this deviation is input into the PID control algorithm to calculate the closed-loop regulating power of the slide table oil temperature regulating device. .

[0055] Step S2: After the experiment begins, at each interval... time( The value range is 5 min to 10 min. The compensation adjustment power of the slide oil temperature regulating device is calculated and updated based on the ideal temperature change curve of the test chamber. , The initial value is 0; the power of the slide oil temperature regulating device is compensated and adjusted. The update method is as follows:

[0056] S21. Record the ideal temperature change curve of the test chamber as follows: Independent variable Time, in minutes, dependent variable The temperature of the test chamber is expressed in degrees Celsius; the minimum allowable operating temperature of the test chamber is denoted as . (Value range: -100℃ to -60℃); Ideal temperature change curve of the test chamber. The slope of the ideal temperature change curve of the test chamber is obtained by differentiation. .

[0057] S22, Record the current update time as... ,in: Indicates the first The next update, the value is... ; Calculate from time Until time Area of ​​the ideal temperature curve of the test chamber within the range The specific calculation method is divided into the following two cases:

[0058] a) From the perspective of time Until time Slope of the ideal temperature change curve of the test chamber within the range If no change occurs, then the area of ​​the ideal temperature curve in the test chamber is... The calculation formula is:

[0059]

[0060] in: express The ideal temperature value corresponding to that moment. for The ideal temperature value corresponding to that time, for reference Figure 4 .

[0061] b. If from the perspective of time Until time Slope of the ideal temperature change curve of the test chamber within the range Changes will occur over time. Until time The range is determined by the slope of the ideal temperature change curve of the test chamber. The changes are divided into the following categories: Section, Record The start time of the segment interval is , No. The end time of the segment interval is , The value is The area of ​​the ideal temperature curve in the test chamber is then... The calculation formula is:

[0062]

[0063] in: for The ideal temperature value corresponding to that moment; for The ideal temperature value corresponding to that time, for reference Figure 5 .

[0064] S23. Based on the area of ​​the ideal temperature curve of the test chamber obtained. Calculate the compensation and adjustment power of the slide oil temperature regulating device. The specific steps are as follows:

[0065] The upper limit of the optimal operating temperature threshold for the oil is defined as follows: (Value range is 40℃~50℃), the lower limit of the optimal operating temperature threshold for the oil is denoted as . (The value range is 5℃~10℃), then The area of ​​the upper limit of the optimal operating temperature during the compensation time is Optimal operating temperature lower limit area Oil surface area at optimal temperature The calculation formula is:

[0066]

[0067] Based on the area of ​​the ideal temperature curve of the test chamber The area with the upper limit of the optimal operating temperature of the oil is , Lower limit area of ​​the oil's optimal operating temperature Oil surface area at optimal temperature The size determines the compensation and adjustment power of the slide oil temperature regulating device. There are three possible scenarios:

[0068] like If no power compensation is performed, the slide oil temperature regulating device will compensate and regulate the power. .

[0069] like Then, cooling power compensation is performed, and the slide oil temperature regulating device compensates and regulates the power. ,in: This is the maximum cooling power of the slide oil temperature regulating device, and its value is negative.

[0070] like Then, heating power compensation is performed, and the slide oil temperature regulating device compensates and regulates the power. ,in: This is the maximum heating power of the slide oil temperature regulating device, and its value is a positive number.

[0071] Step S3: Close the power of the slide oil temperature regulating device. Power compensation adjustment with slide oil temperature regulating device The total regulating power of the slide oil temperature regulating device is obtained by adding them together. ,Right now .

[0072] Step S4: Calculate the total regulating power of the slide oil temperature regulating device. The real-time adjustable power is generated after applying the power threshold function, which then drives the slide oil temperature regulating device. The real-time adjustable power generated after applying the power threshold function satisfies the following conditions:

[0073] like or , If the power threshold function coefficient is 0.1~0.15, then the real-time regulating power generated after passing through the power threshold function is 0.

[0074] like or The real-time adjustable power is then generated after passing through the power threshold function. .

[0075] like The real-time adjustable power is then generated after passing through the power threshold function. .

[0076] like The real-time adjustable power is then generated after passing through the power threshold function. .

[0077] like Figure 2 As shown, this application also provides a dynamic control system for the slide oil temperature of a multi-integrated vibration test system, which includes a temperature sensor, an oil temperature regulating device, and a control unit. Figure 2 In the diagram, 1 is the slide table surface, 2 is the T-shaped guide rail, 3 is the temperature sensor, 4 is the slide table oil separator, 5 is the test chamber, and 6 is the oil temperature regulating device.

[0078] The temperature sensor is installed at the return port of the slide table to detect the real-time temperature of the slide table oil and transmit the detected temperature signal to the control unit.

[0079] The oil temperature regulating device is arranged on the inner wall of the test chamber below the slide table. It is used to receive control signals sent by the control unit and regulate the heating or cooling of the slide table oil. The oil temperature regulating device includes an oil heating device and an oil cooling device. The oil heating device can be an electric heating tube, resistance wire or other heating equipment, and the oil cooling device can be air cooling or water cooling, etc.

[0080] The control unit is electrically connected to the temperature sensor and the oil temperature regulating device via a data cable. It integrates a control method to receive the temperature signal transmitted by the temperature sensor, calculate the real-time regulating power, and send a control signal to the oil temperature regulating device.

[0081] In summary, this embodiment details the practical application of the above-mentioned slide table oil temperature control method and system. The optimal oil temperature is set to 30℃~50℃, with compensation adjustment power updated every 5-10 minutes. The minimum allowable operating temperature of the test chamber is -100℃~-60℃, and the power threshold function coefficient is 0.1~0.15. Real-time oil temperature is collected by a temperature sensor at the slide table return port. The closed-loop adjustment power is calculated using a PID closed-loop algorithm. The area under the curve of the ideal temperature curve of the test chamber is calculated for both constant and changing slopes to determine the compensation adjustment power. The two values ​​are then superimposed and processed by a threshold function to generate real-time adjustment power, driving the adjustment device on the inner wall of the test chamber. The control unit coordinates all components, ultimately stabilizing the oil temperature within the optimal range. This verifies the feasibility and practicality of the method and system of this invention, effectively adapting to the high and low temperature alternating scenarios of multi-stage vibration tests, ensuring the slide table's operational accuracy and test reliability.

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the optimal oil temperature of a slide table in a multi-stage vibration testing system, characterized in that, Includes the following steps: Step S1: Set the optimal temperature for the slide oil. A temperature sensor is installed at the return port of the slide table to collect the actual temperature of the slide table oil. The regulating power value of the slide table oil temperature regulating device is defined as a positive value indicating heating and a negative value indicating cooling. The deviation between the set temperature and the actual temperature of the slide table oil is calculated, and this deviation is input into the closed-loop control algorithm to calculate the closed-loop regulating power of the slide table oil temperature regulating device. ; Step S2: After the experiment begins, at each interval... The time is calculated based on the ideal temperature change curve of the test chamber, and the compensation adjustment power of the slide oil temperature regulating device is updated once. , The initial value is 0; Step S3: Close the power of the slide oil temperature regulating device. Power compensation adjustment with slide oil temperature regulating device Adding them together, we get the total regulating power of the slide oil temperature regulating device. ,Right now ; Step S4: Calculate the total regulating power of the slide oil temperature regulating device. After passing through the power threshold function, the real-time adjustable power is generated, which in turn drives the slide oil temperature regulating device to work, so that the slide oil temperature is stabilized in the optimal working range.

2. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 1, characterized in that, In step S1, the closed-loop control algorithm adopts the PID control algorithm.

3. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 1, characterized in that, In step S2, the slide oil temperature regulating device compensates for the power adjustment. The update methods include: S21. Record the ideal temperature change curve of the test chamber as follows: Independent variable Time, in minutes; dependent variable The temperature of the test chamber is expressed in degrees Celsius; the minimum allowable operating temperature of the test chamber is denoted as . ; Ideal temperature change curve of the test chamber By taking the derivative, the slope of the ideal temperature change curve of the experimental chamber can be obtained. ; S22, Record the current update time as... ,in Indicates the first The next update, the value is... ; Calculate from time Until time Area of ​​the ideal temperature curve of the test chamber within the range ; S23. Based on the area of ​​the ideal temperature curve of the test chamber obtained. Combined with the upper limit area of ​​the optimal operating temperature threshold of the oil Area of ​​the lower limit of the optimal operating temperature threshold of the oil Oil surface area at optimal temperature Calculate the compensation and adjustment power of the slide oil temperature regulating device. .

4. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 3, characterized in that, In step S22, the area of ​​the ideal temperature curve of the test chamber The calculation method has two cases: a: If we consider time Until time Slope of the ideal temperature change curve of the test chamber within the range If no change occurs, then the area of ​​the ideal temperature curve in the test chamber is... The calculation formula is: in: express The ideal temperature value corresponding to that moment. for The ideal temperature value corresponding to that moment; b: If we consider time Until time Slope of the ideal temperature change curve of the test chamber within the range If a change occurs, then the interval will be... The changes are divided into the following categories: Section, Record The start time of the segment interval is , No. The end time of the segment interval is , The value is The area of ​​the ideal temperature curve in the test chamber is then... The calculation formula is: in: for The ideal temperature value corresponding to that moment; for The ideal temperature value corresponding to a given moment.

5. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 3, characterized in that, In step S23 , and The calculation formula is: in, The upper limit of the optimal operating temperature threshold for hydraulic fluid. The lower limit of the optimal operating temperature threshold for the oil; the power compensation adjustment of the slide table oil temperature regulating device. The method for determining it is as follows: like If no power compensation is performed, the compensation will be adjusted. ; like Then, cooling power compensation is performed, and the compensation adjustment power is adjusted. ,in: This is the maximum cooling power of the slide oil temperature regulating device, and its value is negative. like Then, heating power compensation is performed, and the compensation adjustment power is adjusted. ,in: This is the maximum heating power of the slide oil temperature regulating device, and its value is a positive number.

6. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 1, characterized in that, In step S4, after applying the power threshold function, the real-time adjustable power is generated, satisfying the following conditions: like or , If the coefficient is the power threshold function coefficient, then the real-time adjustment power is 0; like or Then the power is adjusted in real time. ; like Then the power is adjusted in real time. ; like Then the power is adjusted in real time. .

7. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 1, characterized in that, The oil is given an optimal temperature. The value range is 30℃~50℃, and the interval time is... The value range is 5min~10min.

8. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 5, characterized in that, The minimum allowable operating temperature of the test chamber The value range is -100℃ to -60℃, which is the upper limit of the optimal operating temperature threshold for the oil. The value range is 40℃~50℃, and the lower limit of the optimal operating temperature threshold for the oil is... The value range is 5℃~10℃.

9. The method for optimal oil temperature control of a slide table in a multi-integrated vibration test system according to claim 6, characterized in that, The power threshold function coefficient The value range is 0.1 to 0.

15.

10. A dynamic control system for slide oil temperature in a multi-integrated vibration test system, characterized in that, The method for controlling the optimal oil temperature of the slide table in the multi-integrated vibration test system according to any one of claims 1-9 includes a temperature sensor, an oil temperature regulating device, and a control unit. The temperature sensor is installed at the oil return port of the slide table to detect the real-time temperature of the slide table oil and transmit the detected temperature signal to the control unit. The oil temperature regulating device is arranged on the inner wall of the test chamber below the slide table, and is used to receive control signals sent by the control unit to heat or cool the slide table oil. The control unit is electrically connected to the temperature sensor and the oil temperature regulating device via a data cable. It integrates the control method to receive the temperature signal transmitted by the temperature sensor, calculate the real-time regulating power, and send a control signal to the oil temperature regulating device.

Images