Forward kinematics analysis for a class of asymmetrical parallel manipulators. (20th February 2017)

• Record Type: Journal Article
• Authors: Xu, Qimin; Yang, Yongsheng; Jing, Zhongliang; Hu, Shiqiang
• Is Part Of: International journal of advanced robotic systems. Volume 14:Number 1(2017:Jan./Feb.)
• Publication Date: 2017-02-20
• Subjects: Forward kinematics analysis -- geometry auxiliary line analysis -- improved elimination algorithm -- asymmetrical VGT manipulator; Robotics -- Periodicals; Robotics; Periodicals; 629.892
• DOI: 10.1177/1729881416678132
• Languages: English
• ISSNs: 1729-8806

Abstract

This article focuses on the forward kinematic analysis of a class of asymmetrical parallel manipulators by the proposed elimination approach. To solve the key forward kinematic constraint equations with transcendental parameters of the manipulator, an improved elimination algorithm is presented. First, by analyzing the geometry structure of the manipulator, we find the inherent triangular-topology relations of the manipulator. Further, by utilizing the parameter transformation of angular, the key transcendental equations of forward kinematic analysis are formulated into compact polynomial ones. In this context, comparing with the screw approach by Gallardo-Alvarado suggested that the computation efficiency of our proposed approach is superior. Finally, an example of the asymmetrical variable geometry truss manipulator illustrates the effectiveness of the proposed approach.