This study aims to reduce the burden of the user by a small and light-weight quasi-servo valve that consists of inexpensive on/off valves and embedded controller. And, the pressure control type quasi-servo valve was also proposed and tested. An analytical model of the pressure control type quasi-servo valve including the embedded controller was also proposed. In this paper, the control performance of pressure control type quasi-servo valve is improved by means of the simulation using the proposed model. The control performance of the real valve using the calculated optimal control parameters is also investigated. As a result, the control performance using the valve is improved.
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