小球式旋转直驱压力伺服阀动态特性分析优化

doi:10.7527/S1000-6893.2018.22143

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2018, Vol. 39 ›› Issue (10): 422143-422143.doi: 10.7527/S1000-6893.2018.22143

• Material Engineering and Mechanical Manufacturing • Previous Articles

Dynamic analysis and optimization of ball-type rotary direct drive pressure servo valve

LU Liang¹, XIA Feiyan¹, YIN Yaobao¹, YUAN Jiayang¹, FANG Xiang²

1. School of Mechanical Engineering, Tongji University, Shanghai 200092, China;
2. Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing Mechatronic and Hydraulic Engineering Research Centre, Nanjing 210061, China

Received:2018-03-17 Revised:2018-05-21 Online:2018-10-15 Published:2018-05-30
Supported by:
National Natural Science Foundation of China (51605333,51775383); Shanghai Aerospace Science and Technology Innovation Fund (SAST2017093); Interdisciplinary Project of Tongji University (1370219261)

Abstract

Abstract: To solve the problem of large overshoot and long adjustment time of dynamic pressure response of a new type Ball-type Rotary Direct Dive Pressure Servo Valve (BRDDPSV), a mathematical model is developed based on the classical control theory. The main structure parameters and electronic control method that affect the stability of BRDDPSV are analyzed. Theoretical analysis shows that the response stability of the BRDDPSV can be improved by properly adjusting the structural parameters, including reducing the spool diameter, and decreasing the negative cover of the valve port or changing the small ball and cylindrical hole into a slight interference fit. With respect to the control method, on the basis of the original PI control, large overshoot of dynamic response can be inhibited through integral separation, and the adjustment time of the dynamic response can be shortened through dynamic pressure feedback correction. Finally, semi-physical simulation experiments show that with proper structural parameters and electrical control methods, the pressure overshoot can be controlled to be less than 0.5 MPa (system pressure was 21 MPa), and the response adjustment time can be controlled within 30 ms theoretically and experimentally. It can meet the requirements of aircraft brake pressure servo valve.

Key words: rotary direct drive, pressure servo valve, integral separation, dynamic pressure feedback, aircraft brake

CLC Number:

LU Liang, XIA Feiyan, YIN Yaobao, YUAN Jiayang, FANG Xiang. Dynamic analysis and optimization of ball-type rotary direct drive pressure servo valve[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(10): 422143-422143.

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Dynamic analysis and optimization of ball-type rotary direct drive pressure servo valve

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