Modeling and synchronous control for target motion simulators driven by dual linear motors

This paper addresses the dynamic modeling and synchronous control for the RF Target Motion Simulators(RF TMS). The investigated TMS is used to simulate the target moving a wide range along x and y directions. The y-axis that moving along x directions is driven by two parallel linear motors which are arranged at both ends of y-axis. A mathematical model about the TMS is built using the Lagrangian equation. From the analysis of the model, it is the target motion along y directions that causes the two linear motors to be out of sync. To reduce the synchronization errors of dual linear motors, the effect of target movement on the dual linear motors is seen as disturbance and a sliding mode control(SMC) strategy with two-input-two-output is designed for the dual linear motors. Furthermore, the cross-coupled control(CCC) with PD controller is also studied as a comparison. A simulation process is implemented to verify the effect of proposed control method.