The Electro-hydraulic Servo Valve with High Response Based on New Type Function Materials

Comparing with traditional servo valves, the electro-hydraulic servo valves whose actuators are driven by a new type of function materials (GMM and PMN etc) have many merits such as high response, high precision, and large output force etc. In this paper, the structure and principle of the electro-hydraulic servo valves based on the new type function materials are introduced and their characteristics are analyzed respectively.