2006, Volume 1, Issue 1
Frontiers of Mechanical Engineering >> 2006, Volume 1, Issue 1 doi: 10.1007/s11465-005-0017-4
Experimental Study on the Piezoelectric Prestage Driver of Electrohydraulic Servo Valves
School of Mechanical Science and Engineering, Jilin University, Changchun 130025, China
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Abstract
A piezoelectric actuated prestage driver of hydraulic servo valves for the low-frequency response of electrohydraulic servo valve electromagnetic prestage driver was presented. The new driver was driven by piezoelectric multilayer actuators. The displacement of a piezoelectric multilayer actuator was amplified by a flexure-hinged amplifier based on the principles of triangle amplification. Static and dynamic characteristics were tested on the model machine. The characteristics of good linearity, high resolution, and high-frequency response were approved. The natural frequency reached 1.201 kHz using finite element analysis, and the practice measurement result was 1 kHz.
Keywords
flexure-hinged amplifier ; kHz ; amplification ; high-frequency ; electromagnetic
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