International Journal of Applied Electromagnetics and Mechanics - Volume 33, issue 1-2

Authors: Okuyama, Takeshi | Otsuki, Manabu | Komiya, Ryota | Sugoh, Nozomu | Tanaka, Mami

Article Type: Research Article

Abstract: This paper describes a development of a polymer sensor using a solid polymer electrolyte (SPE) film. The sensor has a basic structure that an SPE film is sandwiched between thin carbon films, and conductive tapes are attached on each carbon film. The SPE film has a good flexibility and it is one of the most promising electroactive polymers (EAP) with capability to be used as an actuator and a sensor in air. First a displacement sensor using the SPE film …was fabricated. The response to deformation was investigated. Then a curvature sensor using the SPE film is proposed. In experiments, it was found that the proposed sensor is available to measure curvature directly without complex calculations. Show more

Keywords: Solid polymer electrolyte, electroactive polymer, sensor, curvature measurement

DOI: 10.3233/JAE-2010-1191

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 823-829, 2010

Authors: Niu, Hongpan | Zhang, Yahong | Zhang, Xinong | Xie, Shilin

Article Type: Research Article

Abstract: This paper investigates vibration control of plate through Electro-Magnetic Constrained Layer Damping (EMCLD) which consists of electromagnet layer, permanent magnet layer and viscoelastic damping layer. The equivalent current assumption is adopted to model the magnetic control force produced by EMCLD. The governing equations of the plate system are obtained using Hamilton's Principle. A simulation and an experiment on vibration control of a cantilever plate are done under the velocity proportional feedback to …demonstrate the active control capability of EMCLD. Both the results of simulation and experiment show EMCLD is an effective means for active vibration control. Show more

Keywords: Electro-magnetic constrained layer damping (EMCLD), vibration control, active control, experiment study

DOI: 10.3233/JAE-2010-1192

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 831-837, 2010

Authors: Sasaki, Minoru | Ozeki, Tomohito | Ito, Satoshi | Tamagawa, Hirohisa

Article Type: Research Article

Abstract: This paper describes the position control of a dual-stage actuator with piezoelectric actuator using self-sensing actuation. The dual-stage servo system consists of a coarse actuator and a fine actuator. A DC servo motor is used as the coarse actuator, and a piezoelectric actuator provides fine control. The position control of the dual-stage actuator using the dual feedback method and self-sensing is presented. Experimental results show the validity of the proposed control system

Keywords: Dual-stage actuator, position control, piezoelectric actuator, self-sensings

DOI: 10.3233/JAE-2010-1193

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 839-847, 2010

Authors: Zhao, Can | Liu, Dandan | Li, Huajun | Tang, Chunrui

Article Type: Research Article

Abstract: By analyzing the driving moment of the hydraulic support hand-control directional valve, this paper presents an electro-hydraulic control method for the directional valve with a magneto-rheological (MR) valve base. Firstly, the theoretical values of the control moment on the feed oil loop and return oil loop of the directional valve are calculated based on the operating principle of the valve and the stress analysis of the control mechanism. Then, the actuator of the directional valve with …MR valve base is designed and the mathematical model of its operation moment is established. Simulation and test results show that this method can realize the electro-hydraulic control of the hydraulic support hand-control directional valve, and satisfy the regulation of intrinsic safety. Show more

Keywords: Magneto-rheological fluid, Hydraulic support, Mass flow directional valve, Electro-hydraulic control, Magneto-rheological hydraulic actuator

DOI: 10.3233/JAE-2010-1194

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 849-855, 2010

Authors: Kim, Dae-Young | Bae, Hyung-Sub | Park, Myeong-Kwan | Yu, Son-Cheol | Yun, Young-Sool | Cho, C. Peter | Yamane, Ryuichiro

Article Type: Research Article

Abstract: Underwater robotic vehicles (URVs) normally use mechanical seals with o-rings, rubber boots, PTFE or Grafoil wedges, or V-rings. Because mechanical seals can cause an unexpected malfunction, we try to adapt magnetic fluid seal (MFS) for underwater robotic vehicles. For reliable design of the MFS, we use numerical simulation of the flow in the MFS using finite element method. The results obtained from experimental investigations of the operation of the MFS contacting with pressurized water will be …compared to numerical simulation results Show more

Keywords: Ferrofluid, magnetic fluid seal (MFS), finite element method, underwater robotic vehicles (URVs)

DOI: 10.3233/JAE-2010-1195

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 857-863, 2010