Abstract: In order to reduce the impact of complex sea conditions on the wave power system,it is necessary to improve the objective value function and design a linear quadratic optimal regulator to constrain the motion state of the system and improve the ability to capture wave energy. By adjusting the weight matrix,the optimal feedback gain is calculated and the ideal q-axis current is obtained,and the space vector control strategy is used to track and control it to balance the relationship between the physical constraints of the system and the power capture;When the model is mismatched,according to the displacement difference between the ideal model and the actual device,the RBF robust controller is designed based on the HJI theory to compensate for the mismatched motion state and power of the system;The simulation results show that the proposed control strategy has good dynamic performance and strong robustness under irregular excitation force,and while satisfying the physical constraints of the system,it can effectively improve the wave-energy capture ability,and compensate the power reduced by the system mismatch.