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Micro Valve with Functional Actuator
윤소남(Sonam Yun),함영복(Young-Bog Ham),이경우(Kyung-Woo Lee),칸다 쿠니오(Kunio Kanda) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
Piezoelectric(PZT) actuator can substitute for solenoid which is used in fluid control field because it has faster response times and no possibility of explosion. Besides, it is available in a high temperature and it has low energy consumption.<br/> In this study, pneumatic micro valve, bimorph type PZT actuator using the softner type PZT, carbon plate as a shim and its controller circuit were suggested and investigated. Performance tests and characteristics analysis, such as displacement, force, hysteresis and frequency properties, were carried out. The displacement of the actuator measured at the end point was 63 ㎛, force of the actuator was 0.052 N and maximum operating frequency was 15Hz. Also, characteristics of the micro valve with PZT actuator were evaluated in a testing system. The results show that the suggested PZT actuator is suitable for micro valve.
Control Cone of Electro-Magnetic Proportional Solenoid Actuator
Sonam Yun(윤소남),Young-Bog Ham(함영복),Byoung-Kyu Ahn(안병규),Kunio Kanda(칸다 쿠니오) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In this paper, steady state characteristics of the solenoid actuator for electro-hydraulic proportional valve determined by the shape of control cone are analyzed using finite element method and it is confirmed that the proportional solenoid actuator has a constant attraction force in the control region independently on the stroke position. And the shape of control cone is optimized using (1+1) evolution strategy to get a constant force. In the optimization algorithm, control cone length, thickness and taper length are used as design parameters.