Servo control system for simulating air pressure of aircraft

Abstract

The invention discloses a servo control system for simulating air pressure of an aircraft. The servo control system comprises a positive pressure source, a negative pressure source, and a pressure sensor, a controller and servo valves that are connected in sequence. The servo valves comprise a first servo valve and a second servo valve. The first servo valve and the second servo valve are used for enabling the positive pressure source and the negative pressure source to be communicated with an air pressure stimulation chamber so that the simulated air pressure P of the air pressure stimulation chamber is changed. The pressure sensor is used for detecting the simulated air pressure P and sending the air pressure to the controller. The controller is used for controlling the opening degree of the servo valves according to instruction signals I. In this way, the rate of rises of drops of the simulated air pressure P is changed. Multiple control valves are adopted to replace a single control valve to conduct associated adjusting of air inflation and air exhaust, differences of a controlled accommodation chamber during an air inflation and exhaust thermodynamic process are made up, pressure control is prevented from being affected due to malfunctioning of the valves, and the pressure change of the controlled accommodation chamber is made to be more steady.

Description

technical field [0001] The invention belongs to the field of air pressure simulation of high-altitude aircraft, and more particularly relates to a servo control system for air pressure simulation of aircraft. Background technique [0002] When a space vehicle flies in an atmospheric environment, it will be directly affected by the space air pressure environment. For example, when the aircraft is at high altitude, the ambient air pressure is negative pressure, but the nose of the aircraft bears positive pressure in the direction of the speed. Using air pressure servo control technology to design the air pressure simulation equipment of the aircraft hardware-in-the-loop simulation system, through the space vehicle flight height half-in-the-loop simulation, the real flight pressure environment is introduced into the aircraft development process, which can effectively shorten the development cycle, reduce development costs, and eliminate product hidden dangers. Ensure flight sta...

AI Technical Summary

Problems solved by technology

One direction single control valve controls two air sources, and its response speed is slow; on the other hand, the control valve switches between charging and pumping quickly, which is prone to pressure shock and oscillation, thus causing adjustment errors due to incorrect switching

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