Development of Nonlinear Adaptive PI Controller For Improved Pneumatic Actuator System

Abstract

The wide application of pneumatic actuator in electricalandelectronics sectors are undeniable hence ask for a good control environment.PID controller is always known with easy implementation and good control performance. Butthe limitation of the PID static gains to effectively control the complex nonlinear system is unavoidable. This suggests the enhancement of the PI controller with a nonlinear adaptive interaction algorithm (AIA) thus develop the nonlinear adaptive AIA PI. The modification is introduced by integrating a nonlinear gain function that adaptively tunes the AIA parameter, hence resulting the best tuning of the PI control gains. The nonlinearities inherent in the system parameters are believed to be handled by the integration, therefore improving the controller performances while maintaining the pneumaticactuator at the desired position. It was proved that improved error performance criteria’s, settling time and overshoot were resulted by the nonlinear adaptive AIA PI compared to fix adaptive AIA PI, and significantlygood compared to conventional PID and PI controllers. Besides, about 19.72%, 11.72%, and 0.22% overshoot were successfully reduced by the nonlinear adaptive AIA PI compared to optimal PSO PI, PSO PID, and PSO AIA, respectively. To conclude, the developmentof the proposed controller is demonstrated to function well and offers an alternative tuning strategy in other electrical and electronic engineeringapplications.