Windup In Control Owing To Sensor Saturation
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Windup in Control Owing to Sensor Saturation
This brief presents methods for anti-windup control in the presence of saturating sensors, arbitrary external reference inputs, and constant or step-like disturbance inputs. It also offers techniques to assure windup prevention when both the input and the output signals are limited and this for systems with one input (SISO) and multiple inputs (MIMO). The emphasis in both is on real-world practicality rather than rigorously proven stability. Two novel solutions for anti-windup control are explored. The first approach, for SISO systems only, follows the classic design paradigm of anti-windup control: design an arbitrary linear compensator and add appropriate measures for their prevention if saturation causes stability problems. This uses a saturation indicator detecting the presence, but not the extent of saturation. The second methodology uses a compensator design that assures the desired rejection of persistent disturbances without jeopardizing closed-loop stability, and can be applied to SISO and MIMO systems alike. Containing worked examples that can be reproduced by the reader, illustrative simulations, and open problems for future research, Windup in Control Owing to Sensor Saturation will be of interest to both academics and engineers in the fields of control and process industries.
Windup in Control
Author: Peter Hippe
language: en
Publisher: Springer Science & Business Media
Release Date: 2006-08-03
Actuator saturation is probably the most frequent nonlinearity encountered in control applications and causes "controller" windup and "plant" windup calling for distinct remedies. Peter Hippe presents antiwindup solutions for stable and unstable single-input-single-output and multiple-input-multiple-output (MIMO) systems. The solutions use only standard tools for the investigation of linear systems – state equations, transfer functions, etc. Less rigorous solutions which guarantee improved performance but without strict proof of stability are also demonstrated. Maintenance of MIMO system directionality and bumpless transfer are included and the developments in control methods are always supplemented by easily repeated numerical examples. Academics doing control-related research and engineers working in the process industries will find this book an extremely useful overview of systematic windup prevention for all kinds of systems. It also has valuable insights to offer the graduate student of control.
Advanced Strategies in Control Systems with Input and Output Constraints
Author: Sophie Tarbouriech
language: en
Publisher: Springer Science & Business Media
Release Date: 2007-07-13
Physical, safety and technological constraints suggest that control actuators can neither provide unlimited amplitude signals nor unlimited speed of reaction. The techniques described in this book are useful for industrial applications in aeronautical or space domains, and in the context of biological systems. Such methods are well suited for the development of tools that help engineers to solve analysis and synthesis problems of control systems with input and output constraints.