An integral sliding model tracking strategy for 3D laser beam position control

This paper discusses how to improve the tracking precision of a laser beam positioning system by using a new sliding model tracking strategy. A continuous strategy of integral sliding mode control is proposed in order to achieve high-accuracy and high robustness of position tracking control. Modelling deviation and unmeasurable external disturbance is compensated for by an integral action term. This scheme can solve the chattering problem without loss of robustness and control accuracy. The simulation and experimental results show that a laser beam position control system with the integrated sliding mode control (ISMC) has higher robustness, higher global stability, higher tracking precision, and speed than a traditional controller.