Dynamic negative pressure servo control system and method based on high-speed switch valves

Abstract

The invention belongs to the field of high-altitude aircraft air pressure simulation device research, and specifically relates to a dynamic negative pressure servo control system based on high-speed switch valves. The system includes a controlled containing cavity, an independent air inflation unit, an air exhaust unit and a controller, an air inflation high-speed switch valve is arranged on the air inflation unit, and more than three air exhaust high-speed switch valves are arranged on the air exhaust unit. The invention also discloses a dynamic negative pressure servo control method based onhigh-speed switch valves. Through independent control of the air inflation unit and the air exhaust unit, configuration of one high-speed switch valve on the air inflation unit and configuration of more than three high-speed switch valves on the air exhaust unit, the problems of high price and large volume of an existing proportional valve / servo valve can be correspondingly effectively solved, serious asymmetry of air exhaust and air inflation which occurs in a negative pressure situation is avoided, dynamic negative pressure servo control can be realized sensitively and accurately, and the dynamic negative pressure servo control system and method based on high-speed switch valves have the advantages of simple structure, low cost and the like, and thus are particularly suitable for spacecraft air pressure simulation equipment.

Description

technical field [0001] The invention belongs to the research field of air pressure simulation devices for high-altitude aircraft, and in particular relates to a dynamic negative pressure servo control system and method based on a high-speed switching valve. 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...

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Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a dynamic negative pressure servo control system and method based on a high-speed switching valve, in which the high-speed switching valve has only two states of open and closed, and correspondingly designed Based on the dynamic negative pressure servo control system and method of high-speed switching valve, and through the research and design of the process of the tracking method and the specific structure and arrangement of each component in the tracking control system, it can effectively solve the existing proportional / servo control system. The problem of high price and large volume of the valve can avoid the serious asymmetry of pumping and inflation under negative pressure, and can realize dynamic negative pressure servo control sensitively and accurately. At the same time, it has the advantages of simple structure and low cost, so Especially suitable for space vehicle air pressure simulation equipment

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