Modelling and high-precision constant pressure control of the pneumatic suspension system
A high precision pneumatic constant pressure control system using proportional flow valve was developed for a pneumatic suspension device (PSD) in order to simulate zero-gravity environment for dynamic test of space structures. The nonlinear mathematical model of the pressure control system was built, which consisted of valve dynamics, flow nonlinearities through the valve orifice, pressure evolution in cylinder chambers, and gas leakage model. The equivalent model with relative degree of 2 was achieved by using input-output linearization approach. Due to parametric uncertainties and unmodeled dynamics, a fuzzy sliding mode controller was developed combined with equivalent control. Experimental results show that the proposed controller has good robustness against the influences of payload, air supply pressure, movement of the pistons and exogenous disturbances, and the steadystate pressure fluctuation is less than 26Pa, which verify the validity of the method.
Pressure control Fuzzy sliding mode controller (FSMC) Pneumatic suspension system
Bo Lu Guoliang Tao Hao Liu
The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou, China
国际会议
杭州
英文
605-609
2009-04-08（万方平台首次上网日期，不代表论文的发表时间）