Efficient Factorization of the Joint-Space Inertia Matrix for Branched Kinematic Trees

  title={Efficient Factorization of the Joint-Space Inertia Matrix for Branched Kinematic Trees},
  author={Roy Featherstone},
  journal={I. J. Robotics Res.},
This paper describes new factorization algorithms that exploit branch-induced sparsity in the joint-space inertia matrix (JSIM) of a kinematic tree. It also presents new formulae that show how the cost of calculating and factorizing the JSIM vary with the topology of the tree. These formulae show that the cost of calculating forward dynamics for a branched tree can be considerably less than the cost for an unbranched tree of the same size. Branches can also reduce complexity; some examples are… CONTINUE READING
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