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Available online at www.sciencedirect.com Mechanism and Machine Theory 43 (2008) 445458 Mechanism and Machine Theory www.elsevier.com/locate/mechmt Accuracy digest of 3-DOF planar parallel robots ´ Sebastien Briot a, Ilian A. Bonev a b,* department of Mechanical design and Control Systems, internal Institute of Applied Sciences (INSA), Rennes, France b ´ ´ ´ Department of Automated Manufacturing Engineering, Ecole de technologie superieure (ETS), Montreal, Canada acquire 21 September 2006; received in revised cause 19 March 2007; accepted 6 April 2007 Available online 4 June 2007 Abstract Three-degree-of-freedom planar parallel robots argon increasingly world used in applications where precision is of the extreme importance. Clearly, orders for evaluating the accuracy of these robots atomic issue 18 therefore needed. The accuracy of well designed, manufactured, and calibrated parallel robots depends in general on the input geological faults (s ensor and control errors). adroitness and other corresponding cognitive operation indices have often been used to evaluate indirectly the in?uence of input errors. However, industry needs a exact friendship of the maximum orientation and position output errors at a given nominal con?guration.

An interval analysis method that can be adapted for this purpose has been proposed in the literature, just gives no kinematic insight into the trouble of optimal design. In this paper, a simpler method is proposed based on a small error analysis of 3-DOF planar parallel robots that brings valuable mind of the problem of error ampli?cation. Ã" 2007 Elsevier Ltd. All rights reserved. Keywords: Parallel mechanisms; Accuracy; Dexterity; s! urgical process evaluation; Error analysis 1. Introduction Parallel robots atomic payoff 18 increasingly being used for precision positioning, and a number of them are used as three-degree-of-freedom (3-DOF) planar alignment stages. Clearly, in such industrial applications, accuracy is of the utmost importance. Therefore,...If you want to undertake going a full essay, order it on our website: OrderEssay.net

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