Abstract
The on-off controlled pneumatic servo system using the high speed solenoid valves instead of a servo proportional valve is very compact in form and has very high operating accuracy. In this system, the opening and closing periods of valves must be modulated according to system state values. Design for optimal control is quite difficult, since the system parameters vary with sampling time.System parameters are not required for the Model Reference Adapting Control (MRAC) law. MRAC is induced to lessen the number of calculation of system parameters. MRAC design is shown and the effects of varying sampling time are discussed. A comparison is made of the performance of indirect law and direct law MRACs.
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