Optimal RIMC-based DLC strategy for time-delayed higher-order integrating and unstable processes with a case study on inverted pendulum

• Published in: 2023 IEEE 3rd International Conference on Smart Technologies for Power, Energy and Control (STPEC) pp. 1 - 6
• Main Authors: Aryan, Pulakraj, Raja, G. Lloyds, Muduli, Utkal Ranjan
• Format: Conference Proceeding
• Language: English
• Published: IEEE 10-12-2023
• Subjects: double control loop; equilibrium optimizer; integrating and unstable processes; PD control; Process control; relocated internal model control; Servomotors; Stability criteria; Steady-state; time delay; Tracking loops; Transient analysis
• DOI: 10.1109/STPEC59253.2023.10430588

This study explores a double loop control (DLC) mechanism enhanced by a relocated internal model control (RIMC) approach, tailored for complex industrial processes characterized by integrating or unstable dynamics and inherent dead-time. The inner loop stabilization is managed through a proportional-derivative (PD) controller, which is designed adhering to the Routh stability criteria. For the outer loop, the RIMC concept is employed to construct a servo controller. Optimizing the controller settings is achieved using the equilibrium optimizer, a metaheuristic technique. This paper presents an evaluation of the stability and robustness of the newly developed RIMC-enhanced DLC system. Compared to existing methods, this approach demonstrates a significant enhancement in performance metrics. The effectiveness of this strategy is further illustrated through a case study involving an inverted pendulum, where the system efficiently managed disturbance pulses.