The coordinates of the upper platform are calculated by performing kinematic analysis on the system. Linear actuators are connected to the platforms by passive joints. Further, static analysis will help choose a suitable LA for fabrication. Upon choosing a linear actuator, a controller can be devised for the resulting system. The project is a work in progress.
Figure: Platform or End Effector Control by Inverse Kinematic Modeling of 3-R-P-S Parallel Manipulator