CN-121979322-A - Optimal oil temperature control method and system for sliding table of multi-comprehensive vibration test system

CN121979322ACN 121979322 ACN121979322 ACN 121979322ACN-121979322-A

Abstract

The invention discloses a method and a system for controlling the optimal oil temperature of a sliding table of a multi-integrated vibration test system, and belongs to the technical field of vibration tables. The problems of lag response, insufficient precision and high energy consumption of the existing sliding table oil temperature control surface during high-low temperature alternation of a test cavity are solved. The method comprises the steps of collecting actual temperature of an oil return port, generating closed loop power through PID (proportion integration differentiation) with a given optimal temperature deviation, calculating curve area of a future period according to an ideal temperature curve of a test cavity at fixed time intervals, comparing the curve area with an optimal working temperature threshold area of oil liquid to determine compensation power, superposing the closed loop power and the compensation power, generating real-time power through power threshold function processing, and driving a test cabin inner wall adjusting device. The invention combines closed loop feedback with feedforward compensation based on curve area, actively suppresses thermal disturbance, stabilizes oil temperature in an optimal interval, improves control precision and response speed, and avoids frequent start and stop of an actuating mechanism by a power threshold function, reduces energy consumption and prolongs service life.

Inventors

YE TENGBO
TANG YU
FU XIAOHONG
SUN WEI
TANG JINLONG
CHANG XIANGDONG
LIU XIANBO
LU HAO
ZHU ZHENCAI

Assignees

苏州东菱振动试验仪器有限公司

Dates

Publication Date: 20260505
Application Date: 20260212

Claims (10)

1. A method for controlling the optimal oil temperature of a sliding table of a multi-integrated vibration test system is characterized by comprising the following steps: Step S1, setting an optimal temperature of oil in a sliding table Arranging a temperature sensor at an oil return port of the sliding table to acquire the actual temperature of the sliding table oil, defining the numerical value of the adjusting power of the sliding table oil temperature adjusting device to be positive, which is in a heating state, and the numerical value to be negative, which is in a cooling state, calculating the deviation between the given temperature of the sliding table oil and the actual temperature of the sliding table oil, inputting the deviation into a closed-loop control algorithm, and calculating to obtain the closed-loop adjusting power of the sliding table oil temperature adjusting device ; Step S2, after the test is started, each interval Calculating and updating the compensation adjustment power of the primary sliding table oil temperature adjusting device according to the ideal temperature change curve of the test cavity , Is 0; S3, adjusting power of the sliding table oil temperature adjusting device in a closed loop manner Compensating and adjusting power with oil temperature adjusting device of sliding table Adding to obtain the total regulating power of the oil temperature regulating device of the sliding table I.e. ; S4, calculating the total regulating power of the oil temperature regulating device of the sliding table After the power threshold function is performed, real-time adjustment power is generated, and then the oil temperature adjusting device of the sliding table is driven to work, so that the oil temperature of the sliding table is stabilized in an optimal working interval.
2. The method for controlling the optimal oil temperature of the sliding table of the multi-integrated vibration test system according to claim 1, wherein in step S1, the closed-loop control algorithm adopts a PID control algorithm.
3. The method for controlling the optimal oil temperature of a sliding table of a multi-integrated vibration test system according to claim 1, wherein in step S2, the oil temperature adjusting device of the sliding table compensates the adjustment power The updating method of (1) comprises the following steps: s21, recording an ideal temperature change curve of the test cavity as Independent variable Time in minutes, dependent variable The temperature of the test cavity is expressed as the unit of degrees centigrade, and the lowest allowable working temperature of the test cavity is recorded as Ideal temperature change curve of test cavity Deriving to obtain the slope of ideal temperature change curve of the test cavity ; S22, recording the current update time as Wherein Represent the first Updating for the second time, wherein the value is Calculating the slave time Time to date Ideal temperature curve area of test cavity in interval range ; S23, according to the obtained ideal temperature curve area of the test cavity Combined with the upper limit area of the oil liquid optimal working temperature threshold Threshold lower limit area of optimal working temperature of oil Setting the optimal temperature area of oil Calculating compensation adjusting power of oil temperature adjusting device of sliding table 。
4. The method for controlling the optimal oil temperature of a sliding table of a multi-integrated vibration test system according to claim 3, wherein in step S22, the ideal temperature curve area of the test chamber The calculation method of (2) is divided into two cases: a, if the slave time Time to date Slope of ideal temperature change curve of test cavity in interval range The ideal temperature curve area of the test cavity is unchanged The calculation formula is as follows: Wherein: Representation of The ideal temperature value corresponding to the moment in time, Is that Ideal temperature value corresponding to moment; b, if the slave time Time to date Slope of ideal temperature change curve of test cavity in interval range When the change occurs, the interval is pressed The variation of (a) is divided into Section, record the first The starting time of the segment interval is First, the The termination time of the segment interval is , The value of (2) is Ideal temperature curve area of test cavity The calculation formula of (2) is as follows: Wherein: Is that Ideal temperature value corresponding to moment; Is that Ideal temperature value corresponding to time.
5. The method for controlling the optimal oil temperature of the sliding table of the multi-integrated vibration test system according to claim 3, wherein in the step S23 、 And The calculation formula of (2) is as follows: Wherein, the The upper limit of the threshold value of the optimal working temperature of the oil liquid, The oil temperature regulating device of the sliding table compensates and regulates the power The determining method of (1) comprises the following steps: If it is Then the power compensation is not carried out, and the power is compensated and regulated ; If it is Then cooling power compensation is carried out to compensate and regulate power Wherein: The maximum cooling power of the sliding table oil temperature adjusting device is a negative value; If it is Then heating power compensation is carried out to compensate and adjust power Wherein: The maximum heating power of the sliding table oil temperature adjusting device is positive.
6. The method for controlling the optimal oil temperature of the sliding table of the multi-integrated vibration test system according to claim 1, wherein the power threshold function in the step S4 is passed, and the real-time adjustment power is generated, so that the following conditions are satisfied: If it is Or (b) , The power is regulated to 0 in real time when the power threshold function coefficient is the power threshold function coefficient; If it is Or (b) Then the power is adjusted in real time to be ; If it is Then the power is adjusted in real time to be ; If it is Then the power is adjusted in real time to be 。
7. The method for controlling the optimal oil temperature of the sliding table of the multi-integrated vibration test system according to claim 1, wherein the oil is given an optimal temperature The value range is 30-50 ℃, and the interval time The value range is 5 min-10 min.
8. The method for controlling the optimal oil temperature of a sliding table of a multi-integrated vibration test system according to claim 5, wherein the lowest allowable working temperature of the test chamber is as follows The value range is-100 ℃ to-60 ℃, and the upper limit of the threshold value of the optimal working temperature of the oil liquid The value range is 40-50 ℃, and the threshold lower limit of the optimal working temperature of the oil liquid is set The value range is 5-10 ℃.
9. The method for controlling the optimal oil temperature of the sliding table of the multi-integrated vibration test system according to claim 6, wherein the power threshold function coefficient The value range is 0.1-0.15.
10. The system is characterized by being used for realizing the optimal oil temperature control method of the sliding table of the multi-integrated vibration test system according to any one of claims 1-9, and comprises a temperature sensor, an oil temperature adjusting device and a control unit; The temperature sensor is arranged at an oil return port of the sliding table and used for detecting the real-time temperature of oil in the sliding table and transmitting a detected temperature signal to the control unit; the oil temperature adjusting device is arranged on the inner wall of the periphery of the test cabin below the table surface of the sliding table and is used for receiving a control signal sent by the control unit and heating or cooling and adjusting the oil of the sliding table; The control unit is electrically connected with the temperature sensor and the oil temperature regulating device through data lines, is internally integrated with the control method, and is used for receiving temperature signals transmitted by the temperature sensor, calculating to obtain real-time regulating power and sending control signals to the oil temperature regulating device.

Description

Optimal oil temperature control method and system for sliding table of multi-comprehensive vibration test system Technical Field The invention relates to the technical field of vibrating tables, in particular to a method and a system for controlling the optimal oil temperature of a sliding table of a multi-comprehensive vibration test system. Background The multi-comprehensive vibration test system is composite test equipment integrating vibration excitation with environmental factors such as temperature, humidity and air pressure, and is widely used for product reliability verification in the fields of aerospace, automobiles, rail transit and the like. The sliding table is key auxiliary equipment in the vibration test system, is mainly used for expanding the functions of the vibration test system, realizes vibration test of a tested piece in the horizontal direction, and generally adopts a hydrostatic guideway supporting mode, so that the table surface of the sliding table can horizontally slide on the base with low friction. The oil temperature directly relates to the lubrication effect, the bearing pressure, the operation control precision and the service life of the parts of the sliding table by influencing the oil viscosity. However, the test cavity of the multi-integrated vibration test system is often in a high-low temperature alternating extreme environment, and the temperature change of the test cavity can directly exchange heat with oil below the sliding table, so that the temperature of the oil can rapidly fluctuate back and forth and deviate from an ideal working interval. The existing sliding table oil liquid control method generally monitors the real-time temperature of oil liquid, and dynamically adjusts the oil liquid temperature in a heating or cooling mode, but the mode often has the problems of low response speed, lag in adjustment and the like, and is generally suitable for occasions with small oil liquid temperature change. For a multi-comprehensive vibration test system, the temperature of a test cavity is often large in coverage range, large in back and forth fluctuation and high in change speed, and the existing oil temperature control method is difficult to quickly respond to the temperature change in a test cabin, so that the oil temperature of a sliding table deviates from an ideal working range seriously in the use process, and the use reliability of vibration test results and equipment is affected. Therefore, the problem of controlling the oil temperature of the sliding table of the multi-integrated vibration test system becomes a key problem to be solved currently. Disclosure of Invention The invention aims to solve the problems in the background technology and provides a method and a system for controlling the optimal oil temperature of a sliding table of a multi-integrated vibration test system. The invention obtains closed-loop regulation power by collecting the actual temperature of the oil liquid in the sliding tablePeriodically calculating, updating, compensating and adjusting power by combining ideal temperature curve of test cavityThe two are overlapped and are processed by a power threshold function and then drive the temperature regulating device, and a corresponding control system is matched, so that the problems of oil temperature fluctuation, slow control response, low precision and high energy consumption caused by high-low temperature alternation of a test cavity are solved, the stability of the oil temperature in an optimal interval is realized, the performance of a sliding table and test data are ensured, and the energy consumption is reduced. In order to achieve the aim of the invention, the technical scheme adopted by the invention is that the optimal oil temperature control method for the sliding table of the multi-comprehensive vibration test system comprises the following steps: Step S1, setting an optimal temperature of oil in a sliding table Arranging a temperature sensor at an oil return port of the sliding table to acquire the actual temperature of the sliding table oil, defining the numerical value of the adjusting power of the sliding table oil temperature adjusting device to be positive, which is in a heating state, and the numerical value to be negative, which is in a cooling state, calculating the deviation between the given temperature of the sliding table oil and the actual temperature of the sliding table oil, inputting the deviation into a closed-loop control algorithm, and calculating to obtain the closed-loop adjusting power of the sliding table oil temperature adjusting device; Step S2, after the test is started, each intervalCalculating and updating the compensation adjustment power of the primary sliding table oil temperature adjusting device according to the ideal temperature change curve of the test cavity,Is 0; S3, adjusting power of the sliding table oil temperature adjusting device in a closed loop manner Compensating and adjusting p