Digital Controller Implementation and Fragility
Subtitle: A Modern Perspective
By: edited by Robert S. H. Istepanian, James F. Whidborne
Contributors: Whidborne, James F.
Series: Advances in Industrial Control; Advances in industrial control
Publisher: Springer London
Published: 2001
Place of publication: London
Language: eng
Format: [electronic resource] :
Number of pages: 277
ISBN-13: 9781447110828; 9781447102656
Subjects: Engineering; Microprogramming; Electronics
Description: In the usual process of control system design, the assumption is made that the controller is implemented exactly. This assumption is usually reasonable, since clearly, the plant uncertainty is the most significant source of uncertainty in the control system, while controllers are implemented with high-precision hardware. However, inevitably, there will be some amount of uncertainty in the controller, a fact that is largely ignored in existing modern advanced robust control techniques. If the controller is implemented by analogue means, there are some tolerances in the analogue components. More commonly, the controller will be implemented digitally, and consequently there will be uncertainty involved with the quantization in the analogue-digital conversion and rounding in the parameter representation and in the numerical computations. A failure to account for these uncertainties in the controller may result in a controller that is "fragile". A controller is fragile in the sense that very small perturbations in the coefficients of the designed controller destabilize the closed-loop control system. This book collects a number of articles which consider the problems of finite-precision computing in digital controllers and filters. Written by leading researchers, topics that the book covers include: - analysis of fragility and finite-precision effects; - design of optimal controller realizations; - design of non-fragile robust controllers; - design of low-complexity digital controllers; - analysis of quantization effects in fuzzy controllers.
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Table of contents: title: Finite Precision Computing for Digital Control Systems; title: Stability Margins and Digital Implementation of Controllers; title: Finite Wordlength Effects in Systems with Fast Samping; title: Implementation of a Class of Low Complexity Low Sensitivity Digital Controllers Using Adaptive Fixed-point Arithmetic; title: Convexity and Diagonal Stability; title: The Determination of Optimal Finite Precision Controller Realizations Using a Global Optimization Strategy; title: Computational Algorithms for Sparse Optimal Digital Controller Realizations; title: On the Structure of Digital Controllers in Sampled-Data Systems with Stability Consideration; title: An Evolutionary Programming Approach to the Design of Finite Word Length Controller Structures; title: Non-fragile Robust Controller Design; title: Robust Resilient Controller Design; title: Robust Non-fragile Controller Design for Discrete-Time Systems with FWL Consideration; title: Synthesis of Controllers with Finite Precision Considerations; title: Quantization Errors in Digital Implementations of Fuzzy Controllers.