A Tuning Method of Active Disturbance Rejection Control for a Class of High-Order Processes

Abstract

 This paper aims to propose a quantitative tuning method for active disturbance rejection control (ADRC) that controls the K/(Ts+1) n-type high-order processes. An asymptote in the Nyquist curve has been observed for the first time and its mathematical expression has been deduced. An asymptote condtion is provided in order to derive a parameter tuning rule under the sensitivity constraint. Although this proposed tuning rule is originally designed for a certain type of high-order processes, it can be extended to other types processes that can be approximated into the form of K/(Ts+1) n. Comparisons with different PID control strategies have been conducted for a range of cases to demonstrate the efficiency of the proposed tuning method. Finally, the effectiveness of the proposed tuning rule is experimentally verified on water tank system that exhibits high-order dynamics. Field tests on the superheater steam temperature control of a circulating fluidized bed (CFB) power plant further demonstrate its potential for applications in complex industrial processes.

Superheated Steam Temperature Control Based on a Hybrid Active Disturbance Rejection Control

“…Generally speaking, as for the control of SST, the hybrid ADRC is able to obtain satisfactory control performance and has simpler control structure than the cascade control strategy. Eventually, we make a comparison of our contributions in this work with those in [4,24,33]. New contributions are summarized as follows:…”

“…All the SST control systems in [4,24,33] are cascade control systems. However, the SST control based on the hybrid ADRC is a single-loop control system which has the simpler structure.…”

“…As for the SST control systems proposed in [4,33], the MADRC and ADRC are designed as the outer-loop controller without considering the inner-loop transfer function G 1 (s). In this paper, the hybrid ADRC is designed based on both G 1 (s) and G 2 (s).…”

Active Disturbance Rejection Control with Low Power Extended State Observer and its Application to Speed Control of Single Shaft Gas Turbines

“…In contrast to model-based control methods, active disturbance rejection control (ADRC), due to its low dependence on model accuracy, satisfactory disturbance rejection performance and simple tuning procedure [1], has developed rapidly in recent years and been applied to a wide range of industrial applications (e.g., [2] [3] [4]).…”

“…To solve the first and second two problems, we replace the LESO with low power extended state observer (LPESO), which was proposed separately in [11] and [12]. The LPESO, with parameters no larger than w 2 o (w o ≫ 1), possesses outstanding high-frequency measurement noise attenuation while preserves the same exponential errordecay speed of LESO [12]. In the current paper, we will study it further by analyzing the performance recovery of it via perturbation theory.…”