Dynamic negative-pressure servo control system and method based on symmetric air cylinders

Abstract

The invention discloses a dynamic negative-pressure servo control system and method based on symmetric air cylinders, and belongs to the field of air pressure simulation of high-altitude vehicles. Thedynamic negative-pressure servo control system comprises an electromechanical transmission module, a pneumatic module, a control module and a data collection module. The electromechanical transmission module adopts a motor direct drive mode, makes a servo motor directly connected with a ball screw, the pneumatic module utilizes the symmetric negative-pressure air cylinders as pressure generators,the control module is used for controlling and switching different pressure input signals and pressure open loop controllers, and the data collection module collects pressure of controlled cavities of the negative-pressure air cylinders and displacement of cylinder pistons through pressure sensors and displacement sensors and transmits the pressure of the controlled cavities of the negative-pressure air cylinders and the displacement of the cylinder pistons to an industrial personal computer. The invention further discloses a dynamic negative-pressure servo control method based on the symmetric air cylinders. By the adoption of the dynamic negative-pressure servo control method, dynamic negative-pressure servo control is achieved rapidly and accurately, meanwhile, the dynamic negative-pressure servo control device has the advantages of being simple in structure and easy to implement, and is particularly suitable for air pressure simulation equipment for spacecraft.

Description

technical field [0001] The invention belongs to the field of air pressure simulation of high-altitude aircraft, and in particular relates to a dynamic negative pressure servo control system and method based on a symmetrical cylinder. Background technique [0002] In the process of space vehicle development, modifying the controller design and verifying the performance of the controller through semi-physical simulation technology can effectively shorten the development cycle, reduce development costs and improve the reliability of new products. The air pressure simulation equipment using air pressure servo control technology provides corresponding static pressure and total pressure signals according to the air pressure altitude and speed instructions corresponding to the flight altitude and airspeed signals of the spacecraft during flight. With the rapid development of aircraft technology, the flight altitude continues to increase; during the flight of the space vehicle, the ...

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Problems solved by technology

[0006] Aiming at the above defects and improvement needs in the prior art, the present invention provides a dynamic negative pressure servo control system and method based on a symmetrical cylinder, wherein, in combination with the negative pressure cylinder, the servo motor direct drive method has good control symmetry and positioning Due to the characteristics of high precision, a dynamic negative pressure servo control system and method based on a symmetrical cylinder is designed accordingly, and by designing the process of the tracking method and the specific structure and arrangement of each component, it can effectively solve the existing constant volume control method. Under extremely low negative pressure, there are problems such as leakage, reduced suction capacity of negative pressure source and dynamic characteristics of the pipeline, and can realize dynamic negative pressure servo control sensitively and accurately. At the same time, the device has the advantages of simple structure and easy implementation, especially suitable for Air Pressure Simulator for Space Vehicles

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