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- W2370490671 abstract "A high precision 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 leakage model based on curve fitting using experimental values.The equivalent model with relative degree of 2 was achieved by using input-output linearization approach.A fuzzy sliding mode controller (FSMC) was developed combined with equivalent control and observer of the valve orifice area due to parametric uncertainties and unmodeled dynamics.Experimental results show that the controller has good robustness against the influences of payload,air supply pressure,movement of the pistons and exogenous disturbances.The steady-state pressure fluctuation is less than 26 Pa,which verifies the validity of the method." @default.
- W2370490671 created "2016-06-24" @default.
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- W2370490671 date "2010-01-01" @default.
- W2370490671 modified "2023-09-24" @default.
- W2370490671 title "Modeling and constant pressure control of pneumatic suspension system for zero-gravity simulation" @default.
- W2370490671 hasPublicationYear "2010" @default.
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