Design of robust tracking and disturbance attenuation control for stochastic control systems

The focus of current research is to address the problem of robust output tracking, input delay compensation and disturbance attenuation performance for a family of stochastic systems by imple-menting the improved-equivalent-input-disturbance (IEID) estimator and the extended Smith predictor (ESP) technique. By integrating the observer and IEID-estimator together with ESP, a new closed -loop configuration is presented. Then, Lyapunov based mean-square asymptotic stability criterion is obtained. According to attained stability criterion, an IEID and ESP based-controller is designed, which ultimately guarantees the exact output tracking. Simulation studies of numerical examples are offered to expose the authenticity of IEID and ESP-based controller. Further, the proposed outcomes in comparison with existing results are presented to demonstrate the efficaciousness of the established control procedure.(c) 2022 ISA. Published by Elsevier Ltd. All rights reserved.

Automated summary

The focus of current research is to address the problem of robust output tracking, input delay compensation, and disturbance attenuation performance for a family of stochastic systems by implementing the improved equivalent input disturbance estimator and the extended Smith predictor technique. A new closed-loop configuration is presented by integrating the observer and IEID estimator with ESP. The Lyapunov based mean-square asymptotic stability criterion is obtained, and based on this criterion, an IEID and ESP-based controller is designed to guarantee exact output tracking. Simulation studies and comparisons with existing results demonstrate the effectiveness of the established control procedure.