Self-motions of 3-RPS manipulators

Abstract

Recently a complete kinematic description of the 3-RPS parallel manipulator was obtained using algebraic constraint equations. It turned out that the workspace splits into two components describing two kinematically different operation modes. In this paper the algebraic description is used to give a complete analysis of all possible self-motions of this manipulator in both operation modes. Furthermore it is shown that a transition from one operation mode into the other in a self-motion is possible.

Keywords

3-RPS-manipulator / singularity / self-motion

References

[1] Tsai L W. Robot Analysis. Hoboken: John Wiley & Sons, Inc., 1999

[2] Gallardo J, Orozco H, Rico J, Aguilar C, Perez L. Acceleration analysis of 3-RPS parallel manipulators by means of screw theory. In: Ryu J H, ed. Parallel Manipulators, New Developments. I-Tech Education and Publishing, 2008

[3] Hunt K H. Structural kinematics of in-parallel-actuated robot-arms. Journal of Mechanisms Transmissions and Automation in Design, 1983, 105(4): 705-712

[4] Bonev I A. Direct kinematics of zero-torsion parallel mechanisms. In: Proceedings of 2008 IEEE International Conference on Robotics and Automation, Pasadena, CA, USA, 2008, 3851-3856

[5] Huang Z, Wang J, Fang Y F. Analysis of instantaneous motions of deficient-rank 3-RPS parallel manipulators. Mechanism and Machine Theory, 2002, 37(2): 229-240

[6] Basu D, Ghosal A. Singularity analysis of platform-type multi-loop spatial mechanisms. Mechanism and Machine Theory, 1997, 32(3): 375-389

[7] Schadlbauer J, Walter D, Husty M L. A complete analysis of the 3-RPS manipula-tor. In: Bandyopadhyay G K S, Ramu P eds. Machines and Mechanisms. Narosa Publishing House, 2011, 410-419

[8] Karger A. Self-motions of 6-3 Stewart-Gough type parallel manipulators. Advances in Robot Kinematics: Motion in Man and Machine, 2010, 359-366

[9] Husty M L, Pfurner M, Schröcker H P, Brunnthaler K. Algebraic methods in mechanism analysis and synthesis. Robotica, 2007, 25(06): 661-675

[10] Husty M L, Schröcker H P. Kinematics and algebraic geometry. 21st Century Kinematics, 2013, 85-123

[11] 1.Pfurner M. Analysis of spatial serial manipulators using kine-matic mapping, Dissertation for the Doctoral Degree. Innsbruck: University of Innsbruck, 2006

[12] Husty M L, Karger A, Sachs H, Steinhilper W. Kinematik und Robotik, Springer, 1997

RIGHTS & PERMISSIONS

Higher Education Press and Springer-Verlag Berlin Heidelberg