Development of Active Control for a Single-Axis Pneumatic Isolator via High Speed on/off Valves
Date Issued
2011
Date
2011
Author(s)
Hsu, Chia-Wei
Abstract
This study aims to develop the anti-vibration control for the active PWM (Pulse Width Modulation) pneumatic vibration isolation system. A novel concept using parallel dual-on/off valves with PWM control signals is proposed to realize the active anti-vibration control and pass tracking control.
In this study, we first derive the nonlinear mathematical model of the pneumatic isolation system. In the controller design, the Fourier series-based adaptive sliding-mode controller with H infinity tracking performance is used for dealing with the uncertainty and time-varying problems of the pneumatic system.
The open-loop and closed-loop dynamic simulations are implemented by MATLAB to verify the feasibility of the proposed system and controller. Furthermore, the experiments of pass tracking control and the active anti vibration control are implemented in the pneumatic isolation system. Finally, in order to satisfy the demand of the practical application in pneumatic isolation system. The hybrid control that combines the pass tracking control and anti-vibration control is developed and verified through experiments under different condition.
Subjects
pneumatic servo system
pneumatic isolator
parallel dual-on/off valves
PWM
pass control
active anti-vibration control
functional approximation
adaptive sliding mode control
H infinity tracking performance.
Type
thesis
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