研究活動
　ECF MicroMotors 　ECF MicroActuators 　ECF-jets Pumps 　ERF Valves
　ERF MicroValves 　Micro Machine 　MRF Valves 　MRF MicroValves
　Micro Pumps 　Sensors 　Manipulators 　CPS Systems
 
ECF マイクロアクチュエータ

ERF Valves and the Motion Control Systems

Principle of suspension-type ERF valve
 
Principle of homogenious-type ERF valve

ER fluids change their apparent viscosity according to an applied electric field. ER fluids have two kinds. One is suspension-type ER fluid with particles, and the other one is homogeneous-type (liquid crystal-type) ER fluid.
Using ER valves, it is possible to directly interface between electric signals and fluid power without the need for mechanical moving parts. It is expected that fluid power systems could benefit from such a simple, high performance mechanism. Also it is expected that ER fluids are applied to micro machines.
More details:
Suspension-type ERF valves
Suspension-type Micro valves
Homogenious-type ERF Micro valves
 
Research Activities
(1) Shinichi YOKOTA, Yutaka KONDOH Kazuhiro YOSHIDA, Kazuya EDAMURA: A Fluid Control Valve making Use of Electro-Rheological Fluid, Proc. The Fourth SIPFC, Tampere, Finland, Vol.2, pp.830/841, (1995)
(2) Yutaka KONDOH, Shinichi YOKOTA, Kazuhiro YOSHIDA: A Mini Valve in Application of Electro-rheological Fluids, Proc. of IFAC San Francisco, Vol.A, pp.493/498, (1996)
(3) Shinichi YOKOTA, Yutaka KONDOH, Kazuhiro YOSHIDA: A Pressure Control Valve in Application of an Electro-rheological Fluid(Application to Drive a One-link Manipulator), Proc. of Ninth Bath Fluid Power Workshop, pp.1/14, (1996)
(4) Yutaka KONDOH, Shinichi YOKOTA, Kazuhiro YOSHIDA : A Control Valve by Making Use of an Electro-Rheological Fluid (Fundamental Characteristics and Application to a Pressure Control Valve), Proc. of the 4th International Conference on Fluid Power Transmission and Control ('97 ICFP), Hangzhou, pp.71/76, (1997)
(5) Yutaka KONDOH and Shinichi YOKOTA: Actuators Making Use of Electro-Rheological Fluids (A Small-sized Linear ER Actuator); Proc. of ICAM'98, August Okayama, Vol.1, pp.639/643, (1998)
(6) Yutaka KONDOH, Shinichi YOKOTA: Movable Electrode-type ER Actuator (Proposal of Linear-type and Rotary-type METERA), 4th ER-MR Conference, Hawaii (1999)
(7) Yutaka KONDOH, Shinichi YOKOTA: Movable Electrode-type ER Actuator (Proposal of Linear-type and Rotary-type METERA), Proc. of IROS'99, Kyongjyu, pp.1757/1761, (1999)
(8) Yutaka KONDOH, Shinichi YOKOTA: Actuators Making Use of Electrorheological Fluids:Movable Electrode-type ER Actuators, the Journal of Intelligent Material Systems and Structures, Vol.10, No.9, pp.718/722, (2000)
(9) Yutaka KONDOH, Shinichi YOKOTA: Applications of ER Fluids to Fluid Power Systems (Proposition of Micro ER Valves and Novel Hydraulic Actuators : METERA), Actuator 2000, Proc. of 7th International Conference on New Actuators, pp.131/134, Bremen, (2000)
(10) Shinichi YOKOTA,Yutaka KONDOH, Kokichi ISHIHARA, Yasufumi OTSUBO, Kazuya EDAMURA: A Fluid Control Valve by Making Use of an Increase in Viscosity of Dielectric Fluids Caused by an Electrode Planted with Hair-like Short Fibers (Proposition of a Fiber -planted ER Valve), JSME International Journal, Vol.46, No.4, Series C, pp.1538/1546, (2003)
(11) Kazuhiro Yoshida, Jung-Ho Park, Hiroshi Yano, Shinichi Yokota and Sonam Yun : A Study of Valve-Integrated Microactuator Using Homogeneous Electro-Rheological Fluid, Journal of Sensors & Materials, Vol.17, No.3, pp.97/112, (2005)

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