Synchronous control for high-accuracy biaxial motion systems

This paper presents an efficient synchronization control scheme for a high-accuracy synchronous motion system. In particular, an optimal PID controller for individual motion axis is first developed to guarantee satisfactory tracking performance according to traditional controller tuning strategy. Then, an additional synchronous controller is introduced to generate cross-coupling control action, so that synchronous position error across axes due to system manufacturing tolerance or disturbance could be suppressed. Experimental results on a positioning system equipped with two permanent-magnet linear motors demonstrate that the synchronization performance with the proposed control scheme could be enhanced.