Design of length measuring system for Stewart platform using new forward kinematics solution

In this paper, based on new presented approach for forward kinematic problem, length measuring system for Stewart platform is designed. The analysis is performed by using a software platform which models the system dynamics and control. A typical feedback linearization method is used to design the controller system and performance of designed controller is studied numerically with respect to measuring error and parametric uncertainties. To provide required parameters for controller, a new forward kinematic solution is designed and compared with Newton-Raphson method numerically. Based on end effector deviations from desired trajectory, actuator length measuring system is compared with moving platform measuring system, which results in more reliable trajectory tracking of controller in case of actuator length measuring system.