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Actuators 2013, 2(2), 27-44; doi:10.3390/act2020027

Analysis and Modeling of Linear-Switched Reluctance for Medical Application

1,2,* , 3
1 University of Toulouse, INPT, UPS; ENSEEIHT, 2 rue Charles Camichel, BP 7122, F-31071 Toulouse cedex 7, France 2 National Center for Scientific Research (CNRS); LAPLACE; F-31071 Toulouse, France 3 Novatem Simplified joint-stock company (SAS); ENSEEIHT, 27 rue d’Aubuisson F-31071 Toulouse cedex 7, France 4 Cardiology Institute, Pitié-Salpêtrière Hospital, 47-83 Bd de l'Hôpital, 75651 Paris Cedex 13, France
* Author to whom correspondence should be addressed.
Received: 18 February 2013 / Revised: 25 March 2013 / Accepted: 7 April 2013 / Published: 22 April 2013
(This article belongs to the Special Issue Human Centered Actuators)
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This paper focuses on the analysis, the modeling and the control of a linear-switched reluctance motor. The application under consideration is medical, and the actuator is to be used as a left ventricular assist device. The actuator has a cylindrical or tubular shape, with a mechanical unidirectional valve placed inside the mover, which provides a pulsatile flow of blood. The analytical expression of the effort based on the linear behavior of the actuator is given. The identification of the characteristics of the prototype actuator and the principle of position control is performed. A modeling of the actuator is proposed, taking into account the variation of inductance with respect to the position. The closed-loop position control of the actuator is performed by simulation. A controller with integral action and anticipatory action is implemented in order to compensate the effects of disturbing efforts and tracking deviations. Moreover, a magic switch is performed in the controller to avoid overshoots. The results show that the closed-loop response of the actuator is satisfactory.
Keywords: switched reluctance; modeling; linear actuator; position control; medical application switched reluctance; modeling; linear actuator; position control; medical application
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Llibre, J.-F.; Martinez, N.; Leprince, P.; Nogarede, B. Analysis and Modeling of Linear-Switched Reluctance for Medical Application. Actuators 2013, 2, 27-44.

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