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Design of a compensation mechanism for an active cardiacstabilizer based on an assembly of planar compliant mechanisms

Published online by Cambridge University Press:  22 April 2014

L. Rubbert*
Affiliation:
ICube, CNRS, INSA de Strasbourg, Université de Strasbourg, France
P. Renaud
Affiliation:
ICube, CNRS, INSA de Strasbourg, Université de Strasbourg, France
S. Caro
Affiliation:
IRCCyN, CNRS, École Centrale de Nantes, France
J. Gangloff
Affiliation:
ICube, CNRS, INSA de Strasbourg, Université de Strasbourg, France
*
a Corresponding author:lennart.rubbert@epfl.ch
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Abstract

In this paper we present the design of a compact active cardiac stabilizer based onplanar compliant mechanisms and piezoelectric actuators. Considering an assembly of planarmanufactured structures helps to simplify the manufacturing process and may increase thecompactness. Parallel architectures constitute interesting solutions for their intrinsicstiffness properties, but in a planar configuration parallel manipulators often exhibitkinematic singularities. Two design approaches for planar parallel compliant mechanismsare presented in this paper. One design approach consists in designing a passive compliantmechanism in a configuration close to the singularity by introducing some asymmetriesduring the manufacturing process. The second design approach consists in taking advantageof the singularities of parallel manipulators to obtain non-trivial solutions. The newproposed active stabilizer, composed of planar compliant mechanisms, is introduced and itsperformances are discussed.

Type
Research Article
Copyright
© AFM, EDP Sciences 2014

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