in this paper‎, ‎an efficient dropping criterion has been used to compute the iul factorization obtained from backward factored approximate inverse (bfapinv) and ilu factorization obtained from forward factored approximate inverse (ffapinv) algorithms‎. ‎we use different drop tolerance parameters to compute the preconditioners‎. ‎to study the effect of such a dropping on the quality of the ilu ...

In this paper two methods are presented. The first is a kinematic evaluation method for two different hexapod structures: standard Stewart platform manipulator with extensible struts and second structure with fixed strut lengths but sliding guideways on fixed platform. The second method addresses the forward kinematic problem where different mathematical representations are combined with variou...

This article presents a model of novel 4-DOF kinematically redundant planar parallel grasping manipulator. As distinct from the traditional manipulator, proposed design includes an extensible platform, which provides kinematic redundancy. constructive feature is used for grasping. The discusses inverse and forward kinematics algorithm analytical relations between platform coordinates driven (co...