CN-121163754-B - Half-mold loading device control system and control method thereof

Abstract

The invention belongs to the technical field of wind tunnel tests, and discloses a half-mold loading device control system and a half-mold loading device control method. The half-mold loading device control system is used for controlling four electric cylinders of the half-mold loading device, achieving Fx, fy, mx, my and Mz value loading of a half-mold balance through the four electric cylinders, taking a main control computer and an embedded ARM controller as core control units, taking collection and processing of all signals as well as controlling running positions of the electric cylinders, and has a motion and state prompting function, and comprises a main control computer, the embedded ARM controller and a control circuit corresponding to each electric cylinder. The control method comprises the steps of controlling the system to perform power-on self-test, performing load rationality test, calculating a target value of the tension pressure sensor, performing loading in the current loading direction, unloading in the current loading direction, replacing the loading direction, and completing loading of all load groups. Through automatic control, the operation is simple and convenient.

Inventors

• HUANG PANYU
• XIANG GUANGWEI
• LIU DAWEI
• HONG XINGFU
• LIAO DAXIN
• DENG ZHANGLIN
• LIU WEN
• LI HAOPENG
• WANG CHAO

Assignees

• 中国空气动力研究与发展中心高速空气动力研究所

Dates

Publication Date

20260508

Application Date

20251121

Claims (3)

1. 1. The half-mold loading device control method is characterized in that a half-mold loading device control system is used for controlling four electric cylinders of a half-mold loading device, and Fx, fy, mx, my and Mz values of a half-mold balance are loaded through the four electric cylinders; the half-module loading device control system takes a main control computer and an embedded ARM controller as core control units and is responsible for collecting and processing all signals, controlling the running position of the electric cylinders and having the prompting functions of movement and state; The master control computer is connected with one communication interface of the ARM controller through the Ethernet, the demonstrator is connected with the other communication interface of the ARM controller through the Ethernet, and data monitoring and operation command transmission when the master control computer is far away from the master control operation table and is close to the loading device for observation CAN be realized through a telescopic cable; The control circuit comprises a power amplifier module, a servo motor, a speed reducer and a pulling pressure sensor which are sequentially connected, wherein a signal of the pulling pressure sensor is transmitted to an analog quantity acquisition module of a main control computer to carry out force closed-loop control; the half-mold loading device control method comprises the following steps: s1, controlling a system to perform power-on self-test; After the mechanical part of the half-module loading device is installed and prepared, the control system is electrified for self-checking, wherein the self-checking content comprises the working states of demonstrator communication, main control computer communication and CAN bus communication, and after all the self-checking content is normal, the control system enters a standby interface to wait for a user to input loading load, otherwise, error codes and prompt information are given; S2, carrying out load rationality test; Automatically reading the range information of the half-scale balance in the main control computer, or manually inputting the range information of the half-scale balance by a user through a system configuration interface, verifying the rationality of the load input by the user, and carrying out load rationality test; S3, calculating a target value of the pull pressure sensor; Setting Fx, fy, mx, my and Mz values of a half-mould balance through a touch screen at a load input interface of a static calibration module, prompting the user to exceed the half-mould balance range when the load exceeds the half-mould balance range, requiring re-input, and calculating a target value of a tension pressure sensor after the validity of all loads passes; S4, loading in the current loading direction; After the user issues the current loading direction loading instruction: S41, slowly moving each electric cylinder, gradually increasing a given current square wave signal from 100Hz/0.5A, and changing a current loop parameter KP from weak to strong, wherein at last, when the current square wave signal is 100Hz/1A, the current loop waveform, instruction and feedback amplitude are not more than 20%, and the phase is not more than 20%; s42, calculating real-time linear motion speed of each electric cylinder through the linear grating feedback electric cylinder linear motion position, wherein the maximum motion speed is not more than 1mm/s, and displaying the electric cylinder position on an interface in real time to ensure that the display is consistent with the instruction direction; s43, if a user presses a scram button in the loading process, loading is suspended, and after the fault is cleared, loading is continued according to a user instruction; s44, judging that the loading is finished when each tension pressure sensor reaches 99.99% of a target value, stopping movement of each electric cylinder, and prompting a user to finish the loading; s45, collecting data of each component of the half-mould balance, and calculating loading relative errors; s5, unloading in the current loading direction; After a user gives an unloading instruction in the current loading direction, each electric cylinder slowly moves reversely, a given current square wave signal is gradually increased from 100Hz/0.5A, a current loop parameter KP is gradually strengthened from weak, and finally when the current square wave signal is 100HZ/1A, the current loop waveform, the instruction and the feedback amplitude are not more than 20%, the phase is not more than 20%, until the load is less than the initial pretightening force, the movement is stopped, and the user is prompted to finish unloading; s6, changing the loading direction; if the loading direction is changed, repeating the steps S4 to S5 to finish the reverse loading; S7, loading all load groups; And when a plurality of load groups exist, repeating S4-S6, and storing the load data after all load groups are loaded, so that the system is powered off.
2. 2. The method for controlling the half-mold loading device according to claim 1, wherein the electric cylinder adopts a control strategy of a current closed loop, a speed closed loop and a two-position closed loop, adopts PID adjustment of the current closed loop, the speed closed loop and the position closed loop of a servo driver, and improves the control precision of the electric cylinder through a linear grating.
3. 3. The method for controlling a half-mold loading device according to claim 2, wherein the control software adopts a modularized structural programming method, the control software is divided into a plurality of functional modules, and each module performs a corresponding function; menu bar with system configuration, system self-checking, angle clearing, angle resetting, fault clearing, remote control and developer options; the static calibration module is used for setting Fx, fy, mx, my and Mz values of the half-mould balance; the state display module is used for displaying Fx, fy, fz, mx, my and Mz values of the half-model balance in real time; the one-key calibration module is used for testing Fx, fy, mx, my and Mz values of the half-mould balance according to a given angle; A drawing module, which displays curves of Fx, fy, fz, mx, my and Mz values of the half-mould balance which change along with the increase of time; And the operation control module displays loading setting, operation record, automatic loading, automatic unloading, data storage and withdrawal of the half-mould balance.

Description

Half-mold loading device control system and control method thereof Technical Field The invention belongs to the technical field of wind tunnel tests, and particularly relates to a half-mold loading device control system and a half-mold loading device control method. Background Before the wind tunnel half-module force test is carried out, balance loading test is required to be carried out so as to ensure that balance force measurement data and mechanical connection of an assembly body work normally. The method directly adopts a balance to calibrate a corresponding loading module for loading, has no independent loading control system, is difficult to ensure the working state of the half-mould balance after assembly on the test site, is difficult to evaluate the connection reliability of an assembly body, and has high reworking cost for processing after the model assembly is completed if a problem is found in the test, thereby seriously affecting the test period and even leading to failure to deliver test data as expected. The other is to install the half-mould balance transversely (horizontally), load the force component by mounting the weight, the force arm is difficult to accurately measure by the mode, the combined loading of all loads cannot be realized, the test is incomplete, the mounting weight is limited by the space of the field and the test field, and the load close to the half-mould balance is difficult to apply to test the technical states of deformation, connection reliability and the like. This approach is typically loaded manually, without separate devices and control programs. Currently, there is a need to develop a half-mold loading device control system and a control method thereof. Disclosure of Invention The invention aims to provide a half-mold loading device control system, and the other technical problem to be solved by the invention is to provide a half-mold loading device control method for overcoming the defects in the prior art. The half-mold loading device control system is used for controlling four electric cylinders of the half-mold loading device, realizes Fx, fy, mx, my and Mz value loading of a half-mold balance through the four electric cylinders, takes a main control computer and an embedded ARM controller as a core control unit and is responsible for collecting and processing all signals, controlling the running positions of the electric cylinders and having the prompting functions of movement and state; The master control computer is connected with one communication interface of the ARM controller through the Ethernet, the demonstrator is connected with the other communication interface of the ARM controller through the Ethernet, and data monitoring and operation command transmission when the master control computer is far away from the master control operation table and is close to the loading device for observation CAN be realized through a telescopic cable; The control circuit comprises a power amplifier module, a servo motor, a speed reducer and a pulling pressure sensor which are sequentially connected, wherein a signal of the pulling pressure sensor is transmitted to an analog quantity acquisition module of a main control computer to carry out force closed-loop control, a current detection circuit is arranged between the power amplifier module and the servo motor, an encoder feedback circuit is also arranged between the power amplifier module and the servo motor, the servo motor realizes linear motion through the speed reducer, the distance of the linear motion is measured through a linear grating, and a measurement signal is transmitted to the power amplifier module. Further, the electric cylinder adopts a control strategy of a current closed loop, a speed closed loop and a double-position closed loop, adopts PID regulation of the current closed loop, the speed closed loop and the position closed loop of the speed reducer, and improves the control precision of the electric cylinder through a linear grating. Further, the control software adopts a modularized structural program design method, the control software is divided into a plurality of functional modules, and each module completes corresponding functions; menu bar with system configuration, system self-checking, angle clearing, angle resetting, fault clearing, remote control and developer options; the static calibration module is used for setting Fx, fy, mx, my and Mz values of the half-mould balance; the state display module is used for displaying Fx, fy, fz, mx, my and Mz values of the half-model balance in real time; the one-key calibration module is used for testing Fx, fy, mx, my and Mz values of the half-mould balance according to a given angle; A drawing module, which displays curves of Fx, fy, fz, mx, my and Mz values of the half-mould balance which change along with the increase of time; And the operation control module displays loading setting, operation record, automatic loading, automatic unloading