NDLI: Analytical design of a generalised predictor-based control scheme for low-order integrating and unstable systems with long time delay

Content Provider	IET Digital Library
Author	Chen, Yueling Liu, Tao García, Pedro Albertos, Pedro
Abstract	In this study, the problem of controlling integrating and unstable systems with long time delay is analysed in the discrete-time domain for digital implementation. Based on a generalised predictor-based control structure, where the plant time delay can be taken out of the control loop for the nominal plant, an analytical controller design is proposed in terms of the delay-free part of the nominal plant model. Correspondingly, further improved control performance is obtained compared with recently developed predictor-based control methods relying on numerical computation for controller parameterisation. The load disturbance rejection controller is derived by proposing the desired closed-loop transfer function, and another one for set-point tracking is designed in terms of the H2 optimal control performance specification. Both controllers can be tuned relatively independently in a monotonic manner, with a single adjustable parameter in each controller. By establishing the sufficient and necessary condition for holding robust stability of the closed-loop control system, tuning constraints are derived together with numerical tuning guidelines for the disturbance rejection controller. Illustrative examples taken from the literature along with temperature control tests for a crystallisation reactor are used to demonstrate the effectiveness and merit of the proposed method.
Starting Page	884
Ending Page	893
Page Count	10
ISSN	17518644
Volume Number	10
e-ISSN	17518652
Issue Number	Issue 8, May (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-cta/10/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-cta.2015.0670
Journal	IET Control Theory & Applications
Publisher Date	2016-05-16
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Closed Loop System Closed-loop Control System Closed-loop Transfer Function Control Control System Analysis Control System Synthesis Crystallisation Reactor Discrete Control System Discrete Time System Discrete-time Domain Generalised Predictor-based Control Scheme H2 Optimal Control Performance Specification Load Disturbance Rejection Controller Long Plant Time Delay Nominal Plant Model Optimal Control Robust Control Robust Stability Stability in Control Theory Synthesis Method Temperature Control Thermal Variables Control Transfer Function
Content Type	Text
Resource Type	Article
Subject	Control and Optimization Control and Systems Engineering Human-Computer Interaction Electrical and Electronic Engineering Computer Science Applications

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