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김소룡,하넉산,구남서,배병운,김태흔,고한서,이창섭,Jin, Xiaolong,Ha, Ngocsan,Goo, Namseo,Bae, Byungwoon,Kim, Taeheun,Ko, Hanseo,Lee, Changseop 한국군사과학기술학회 2015 한국군사과학기술학회지 Vol.18 No.3
Piezoelectric-based hydraulic actuator is a hybrid device consisting of a hydraulic pump driven by piezoelectric stacks that is coupled to a conventional hydraulic cylinder via a set of fast-acting valves. Nowadays, such hybrid actuators are being researched and developed actively in many developed countries by requirement of high performance and compact flight system. In this research, a piezoelectric hybrid actuator has been designed and tested. To achieve bi-directional capabilities in the actuator, solenoid valves were used to control the direction of output fluid. The experimental testing of the actuator in uni-directional and bi-directional modes was performed to examine performance issues related to the solenoid valves. The results showed that the bi-directional performance was slightly lower than uni-directional performance due to air bubble developed in the valve system. A new design to solve the vacuum problem has been proposed to improve the performance of the hybrid actuator.