A measurement and control system and its measurement and control method based on labview

Abstract

The invention relates to a measurement and control system based on labview, comprising a control computer and a data acquisition card connected thereto, and a valve controller; the data acquisition card is used to receive measurement data from sensors and send it to the control computer; the control computer is used to measure The data is stored and displayed, and the control command is sent to the valve controller; the valve controller is used to control the opening and closing of the valve according to the control command. The measurement and control method includes: the control computer edits the communication information according to the set equipment status, and sends the command communication information to the valve controller; the valve controller sends the response communication information to the control computer after receiving the command communication information, and opens or closes the corresponding valve, executes After the completion, send the response communication information to the control computer; after the control computer receives the response communication information, it controls the data acquisition card to collect and store it. The invention not only has real-time calculation, but also has precise control ability. Compared with the general control method, the system complexity and cost are greatly reduced.

Description

technical field [0001] The invention relates to a measurement and control system in the field of aerospace, to be precise, a measurement and control system and method based on time sequence synchronous master-slave control. Background technique [0002] In the field of aerospace, hydrazine thrusters are widely used in the attitude and orbit control of satellites, launch vehicles, spaceships and other aircraft. With the new requirements of returnable spacecraft, recoverable rockets and high precision requirements, the requirements for hydrazine propulsion devices are becoming more and more stringent. The ground thermal test performance test of the hydrazine thruster determines the actual performance of the hydrazine thruster in operation. The core indicators of the ground thermal test of the hydrazine thruster include the start-up response time and the stop response time, etc., and the control sequence is a necessary parameter for calculating the core indicators. [0003] A...

AI Technical Summary

Problems solved by technology

[0005] The other is that the control computer alone realizes the control work, and the additional data acquisition instrument performs the test work. Since the performance evaluation index of the hydrazine thruster thermal test run test is closely combined with the control sequence, this mode can only get the original data , the test performance index cannot be calculated in real time, and additional manual follow-up calculation is required, which wastes a lot of time and manpower, and it cannot automatically stop in an emergency when an abnormal test state occurs

Images