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A Statistical Approach to the Forward Kinematics Nonlinearity Analysis of Gough-Stewart Mechanism

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  • Davoud Karimi
  • Mohammad Javad Nategh

Abstract

Both the forward and backward kinematics of the Gough-Stewart mechanism exhibit nonlinear behavior. It is critically important to take account of this nonlinearity in some applications such as path control in parallel kinematics machine tools. The nonlinearity of inverse kinematics is straightforward and has been first studied in this paper. However the nonlinearity of forward kinematics is more challenging to be considered as there is no analytic solution to the forward kinematic solution of the mechanism. A statistical approach including the Bates and Watts measures of nonlinearity has been employed to investigate the nonlinearity of the forward kinematics. The concept of standard sphere has been used to check the significance of the nonlinearity of the mechanism. It is demonstrated that the length of the region, defined as the linear approximation of the lifted line, has a significant impact on the nonlinearity of the mechanism.

Suggested Citation

  • Davoud Karimi & Mohammad Javad Nategh, 2011. "A Statistical Approach to the Forward Kinematics Nonlinearity Analysis of Gough-Stewart Mechanism," Journal of Applied Mathematics, Hindawi, vol. 2011, pages 1-17, August.
    • Handle: RePEc:hin:jnljam:393072
    DOI: 10.1155/2011/393072
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