NDLI: Characterization of Magnetoelectric Cantilever for Use as an Ablation Tool in Minimally Invasive Surgery

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Sundaresan, Vishnu Baba Atulasimha, Jatulasimha
Copyright Year	2009
Abstract	Despite great strides in materials science and control, an automated surgical tool is still in the fiction pages due to the lack of a surgical tool employing a self-sensing actuator. In an attempt to fill this void, we present magnetoelectric materials as a solution for designing surgical tools. This paper discusses our ongoing work to model the dynamics of the magnetoelectric material for use in a control loop. The surgical tool is a two-segment magnetoelectric cantilever in which one of the two magnetoelectric segments is attached to a fixed support called the base. A floating segment called the cutting tip is attached to the base using a flexible hinge. The two-segment tool is placed in a remote magnetic field to generate the cutting force in the magnetoelectric tip. Displacement in the tip generates a proportional electrical response from the piezoelectric layer and serves as the self-sensing signal. The self-sensing signal from the two segments is used for operating the tool in closed loop operation. The dynamic characterization of the magnetoelectric cantilever in bending is derived from constitutive equations for the magnetoelectric material. The strain terms in the constitutive equation is expressed using generalized coordinates in the shape function for the cantilever in bending mode. The equivalent stiffness of the magnetoelectric cantilever is derived using variational principles for calculating the tip displacement in the cantilever.
Sponsorship	Aerospace Division
Starting Page	205
Ending Page	212
Page Count	8
File Format	PDF
ISBN	9780791848968
DOI	10.1115/SMASIS2009-1350
e-ISBN	9780791838570
Volume Number	Volume 1: Active Materials, Mechanics and Behavior; Modeling, Simulation and Control
Conference Proceedings	ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
Language	English
Publisher Date	2009-09-21
Publisher Place	Oxnard, California, USA
Access Restriction	Subscribed
Subject Keyword	Actuators Materials science Variational principles Displacement Cantilevers Design Hinges Cutting Surgical tools Ablation (vaporization technology) Dynamics (mechanics) Surgery Stiffness Signals Shapes Magnetic fields Constitutive equations
Content Type	Text
Resource Type	Article

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