Statics and singularity loci of the 3-UPU wrist

@article{Gregorio2004StaticsAS,
  title={Statics and singularity loci of the 3-UPU wrist},
  author={Raffaele Di Gregorio},
  journal={IEEE Transactions on Robotics},
  year={2004},
  volume={20},
  pages={630-635}
}
The static analysis of a parallel wrist, known as the 3-universal-prismatic-universal (UPU) wrist, is presented, and the 3-UPU wrist singularity conditions are interpreted from a statics point of view. An equation (singularity equation) that enables finding all the 3-UPU wrist singular configurations is written in explicit form. Moreover, the use of the Rodrigues parameters to parameterize the 3-UPU wrist platform orientation allows the singularity equation to become a fourth-degree polynomial… CONTINUE READING
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