Abstract:Aiming at the puzzle of being lower in control precision of complicated large lag process resulted by uncertainty, the paper presented a sort of control strategy based on algorithm fusion. In the paper, it studied the control puzzle and cybernetics characteristic, based on the complex process characteristic with large lag, fused that the integral control is propitious to eliminate the steady error, Smith estimator control is helpful for time lag compensation, and fuzzy control is conducive to deal with some uncertainty controls. Based on the integration of their respective advantages, it gave a sort of I-Fuzzy-Smith control algorithm. Based on MATLAB simulation, it took the inertial process with large time lag as an example, and conducted the comparative study respectively by PID, Fuzzy-Smith and I-Fuzzy-Smith control, and the response demonstrated that the fusion control strategy would be more advantages in respect of system dynamic & static performance and robustness than others. The research result shows that the proposed fusion control strategy is high in control precision, and shows very strong robustness.