Research on the kinematic singularity and the force singularity of the Stewart platform;

Numerical simulation on stress singularity at the end of soft cushion;

Problem of elastoplastic stress singularity near V-notch tip;

The distributions of the stress along interface after the disappearance of stress singularity are analyzed and discussed.

The stress field near the tip of V notch in a plate with double stress singularities is described,and two methods of determining the double stress intensity factors, K 1 and K 2, which corresponds to double stress singularities are presented on the basis of the isochromatics obtained from the photoelastic experiment.

Kinematic model of a kind of space robot system with nonholonomic constraints was built at first, dynamic singularity of the space robot system was further analyzed, and then, the motion planning method avoiding dynamic singularity based on Lyapunov function was discussed emphatically; valuable results were obtained by a comparative simulation study.

Based on analytical analysis for the asymptotic expressions of the poles, zeros and modal parameters of a flexible manipulator, the asymptotic behavior of the dynamic singularity is discussed analytically for both zero truncated and modal truncated approximation models, and the comparison is carried out as well.