International Journal of Applied Electromagnetics and Mechanics - Volume 27, issue 3

Article Type: Editorial

Abstract: Guest-editorial to the INABIO 2006 special issue.

DOI: 10.3233/JAE-2008-924

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 161-161, 2008

Authors: Sudo, Seiichi | Tsuyuki, Koji | Honda, Takashi

Article Type: Research Article

Abstract: This paper concerned with the development of swimming micro mechanism based on the study of swimming functions and mechanisms of the minute organisms. At the beginning, this paper describes the swimming analysis of a dragonfly nymph using the high speed video camera system. It was found that dragonfly nymphs can swim skillfully by reciprocating motions consisting of a power stroke and a recovery stroke. Based on the swimming analysis of the dragonfly nymph, the micro swimming …robot with the wireless energy supply system was produced. Driving elements of the micro swimming robot are composed of NdFeB permanent magnet, polystyrene body, and a polyethyleneterephthalate film fin. Frequency characteristics of the micro swimming robot propelled by the alternating magnetic field and small permanent magnet were examined experimentally. Show more

Keywords: Swimming analysis, dragonfly nymph, swimming robot, magnetic micro machine

DOI: 10.3233/JAE-2008-925

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 163-175, 2008

Authors: Kojima, Fumio

Article Type: Research Article

Abstract: This paper presents a modeling approach to characterize adjacent cracks on underground gas pipe. Electrical potential method is used for capturing signals from surface cracks on the gas pipe. A three dimensional potential problem is considered for the inspection model. A defect parameter-to-output mapping is represented by means of finite element method in three dimensions. Computational methods for sizing and positioning of cracks are proposed based on our modeling approach.

Keywords: Nondestructive evaluation, inverse problem, flaw detection, finite element method

DOI: 10.3233/JAE-2008-926

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 177-187, 2008

Authors: Choi, Seung-Bok | Han, Young-Min | Sung, Kum-Gil

Article Type: Research Article

Abstract: This paper presents vibration control responses of a passenger vehicle equipped with continuously controllable electrorheological (ER) shock absorbers. As a first step, ER shock absorbers are designed based on the damping force levels and mechanical dimensions required for a middle-sized passenger vehicle. This is accomplished using a graphic user interface (GUI)-based design program which is developed for automotive ER application devices. After evaluating the field-dependent damping force property and controllability on the …design program, ER shock absorbers are manufactured and incorporated with the suspension of the quarter vehicle prior to the road test. A skyhook control algorithm is formulated and experimentally realized for the quarter vehicle ER suspension system. Subsequently, the middle-sized passenger vehicle equipped with four ER shock absorbers (two for front parts and two for rear parts), high voltage amplifies and sensors is prepared and road test is undertaken under various road conditions. Control responses are evaluated in both time and frequency domains. Show more

Keywords: Vibration control, vehicle suspension, electrorheological (ER) shock absorber, road test

DOI: 10.3233/JAE-2008-927

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 189-204, 2008

Authors: Lee, J.C. | Chung, J. | Rho, Y.R. | Lim, K.M. | Kim, J.C. | Park, J.Y. | Lee, D.W. | Choi, H. | Lee, S.M. | Choi, D.S. | Nam, K.W. | Lee, J.J. | Park, J.W. | Choi, S.W. | Choi, J. | Park, C.Y. | Park, S.K. | Son, H.S. | Hwang, C.M. | Kim, H.K. | Sun, K. | Yoon, Y.M. | Lee, K.K. | Won, Y.S. | Min, B.G.

Article Type: Research Article

Abstract: Therapeutic Artificial Organs (TAO) are extracorporeal life-saving devices that are used to bridge patients from emergency to surgery and recovery. This paper details the research on TAOs in Korea along with their development as the clinical devices. In the heart and lung area, the artificial heart system (AnyHeart) and the pulsatile heart-lung machine (T-PLS) have been developed. The T-PLS has been used in 400 patients. In the renal replacement area, the portable hemofiltration machine (C-PAK) …and its applications in home renal treatment are currently being tested through animal experiments. The multiple applications of the biomaterials, the electromechanical system designs and their control, the telecommunication technology and medical technology have been combined in the research and development of life-saving artificial organs for critically ill patients. Show more

Keywords: Therapeutic artificial organs, artificial heart, heart-lung machine, artificial kidney

DOI: 10.3233/JAE-2008-928

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 205-214, 2008

Authors: Kanomata, Takeshi | Murakami, Shuichi | Kikuchi, Daisuke | Nashima, Osamu | Nishihara, Hironori

Article Type: Research Article

Abstract: The magnetic measurements on Ni_{50} (Mn_{0.5} Fe_{0.5})_{25+x} Ga_{25-x} (0 � x � 5.0) ferromagnetic shape memory alloys are made in the temperature range between 4.5 K and 500 K. A phase diagram of Ni_{50} (Mn_{0.5} Fe_{0.5})_{25+x} Ga_{25-x} is determined from the results of the temperature dependence of the initial permeability. The Curie temperature T_C exhibits only mild dependence when …the concentration x increases. The martensitic and reverse martensitic transformation temperatures, T_M and T_R , increase with x. The total moment per formula unit μ_{m} remains constant with x. Show more

Keywords: Ferromagnetic shape memory alloys, martensitic transformation, phase diagram, magnetic moment

DOI: 10.3233/JAE-2008-929

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 215-224, 2008

Authors: Roh, Jin-Ho | Lee, In | Han, Jae-Hung

Article Type: Research Article

Abstract: In applications of shape memory alloys (SMAs) as actuators and vibration isolation devices, understanding of the nonlinear hysteretic response of SMAs is important. The thermomechanical response, especially the pseudoelastic behavior of Ni-Ti SMAs at various annealing temperatures is investigated. The 2-D numerical model of the SMAs is proposed to predict the thermomechanical behaviors of SMA thin film. The methodology to attenuate vibrations of a host structure by using an SMA film is numerically …demonstrated. For the damping enhancement, the structure with SMA films bonded onto it is numerically modeled and the effectiveness of SMA on passive vibration isolation is investigated. Show more

Keywords: Pseudoelasticity, SMA film, damping, passive vibration isolation

DOI: 10.3233/JAE-2008-930

Citation: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 225-241, 2008