[Objectives]It is difficult to control the drum water level of a supercharged boiler due to the strong load disturbance in the sailing process.In order to ensure the stability of the drum water level,it is ne-cessary to study drum water level control methods under strong load disturbance.To this end,this paper pro-poses a sliding mode controller with an improved adaptive genetic algorithm(AGA).[Methods]The velo-city and accelerated speed of the drum water level error is combined with an S-function to design a sliding mode controller.Its stability is then proven using the Lyapunov stability theorem.On this basis,the sliding mode controller parameters are optimized with the improved AGA.[Results]The control performance of the sliding mode controller with improved AGA is compared with that of a PID controller.In response to ramp disturbance signals and step disturbance signals,the sliding mode controller with improved AGA can track the input signal without error.Its stability time is 5 s shorter than that of the PID and its overshoot is lower than that of the PID.[Conclusions]The simulation results show that the sliding mode controller with improved AGA is superior to the PID controller.
维普
万方数据