Free Piston Generator System Based on Model Predictive Control

The free piston linear generator (FPLG) is a promising generation device that can be applied in distributed generation systems with its many advantages. At present, due to the lack of reliable and effective control, the free piston generator has not been applied in the automobile. This paper analyzes the working principle of the free piston generator and establishes a mathematical model. The traditional PI control method is not ideal for piston position control. On this basis, the PI regulator of the current loop is replaced by a model predictive control (MPC) algorithm, and the corresponding simulation and experiment are carried out. The simulation and experiment results show that MPC has better performance than PI control in terms of the speed accuracy and dynamic response as well as position accuracy.