A controller design method for high-order unstable linear time-invariant systems

This paper deals with high-order unstable systems, which are dangerous and more difficult to control. Their presence is increasingly prevalent, posing a great challenge to both traditional PID-based industrial designs and various advanced control strategies which are difficult to implement on common industrial control platforms. In this paper, the generalized desired dynamic equational (G-DDE) PID controller, developed by authors earlier, is proposed as a viable alternative. In addition to guarantee the closed-loop stability, its simple structure and tuning procedure are specifically appealing to practitioners. Simulations and experimental results show advantages of G-DDE PID in reference tracking, disturbance rejection and robustness, thus making G-DDE PID a convenient and effective control strategy for high-order unstable systems, readily implementable on common industrial platforms.(c) 2022 ISA. Published by Elsevier Ltd. All rights reserved.

Automated summary

This paper discusses the control of high-order unstable systems and proposes the generalized desired dynamic equational (G-DDE) PID controller as a viable solution. The G-DDE PID controller not only guarantees closed-loop stability but also has a simple structure and tuning procedure. Simulations and experimental results demonstrate the advantages of G-DDE PID in reference tracking, disturbance rejection, and robustness, making it a convenient and effective control strategy for high-order unstable systems that can be readily implemented on common industrial platforms.