Stiffness Matrix of 6-DOF Cable-Driven Parallel Robots and its Homogenization
Abstract
In this paper, several issues of the stiffness matrix of a general 6-DOF Cable-Driven Parallel Robot (CDPR) are addressed. First, the stiffness matrix of a CDPR with hefty cable is derived analytically. Then, a homogenization of this stiffness matrix is introduced. The discussion on this procedure gives an intuitive meaning of the stiffness matrix of the CDPR and its homogeneous form. This analysis can be used to solve a set of CDPR design problems.