Adaptive Control of Systems with Actuator Failures

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Beschreibung

This book shows readers new ways to compensate for disturbances in control systems prolonging the intervals between time-consuming and/or expensive fault diagnosis procedures, keeping them up to date in the increasingly important field of adaptive control.


When an actuator fails, chaos or calamity can often ensue.

It is because the actuator is the final step in the control chain, when the control system's instructions are made physically real that failure can be so important and hard to compensate for. When the nature or location of the failure is unknown, the offsetting of consequent system uncertainties becomes even more awkward.

Adaptive Control of Systems with Actuator Failures centers on counteracting situations in which unknown control inputs become indeterminately unresponsive over an uncertain period of time by adapting the responses of remaining functional actuators. Both "lock-in-place" and varying-value failures are dealt with. The results presented demonstrate:

• the existence of nominal plant-model matching controller structures with associated matching conditions for all possible failure patterns;

• the choice of a desirable adaptive controller structure;

• derivation of novel error models in the presence of failures;

• the design of adaptive laws allowing controllers to respond to combinations of uncertainties stemming from activator failures and system parameters.

Adaptive Control of Systems with Actuator Failures will be of significance to control engineers generally and especially to both academics and industrial practitioners working on safety-critical systems or those in which full-blown fault identification and diagnosis is either too time consuming or too expensive.



This book will sell because it outlines a method by which the failure of control systems can be circumvented. The reader will be interested either because it can extend the period of plant operation between costly overhauls or because the effect of a sudden uncompensated failure in control would be dangerous (in an airborne aircraft for example) where the techniques exemplified in this book will keep the control systems effective long enough to be able to wind them down safely (in time to land the aircraft for example).

Autorentext

Gang Tao received his B.S. degree in Electrical Engineering from the University of Science and Technology of China in 1982, his M.S. degrees in Electrical Engineering, Computer Engineering and Applied Mathematics in 1984, 1987, 1989, respectively, and Ph.D. degree in Electrical Engineering in 1989 all from the University of Southern California. He was a visiting assistant professor at Washington State University from 1989 to 1991, an assistant research engineer at the University of California at Santa Barbara from 1991 to 1992, and an assistant professor at the University of Virginia from 1992 to 1998, where he is now an associate professor. He was a guest editor for International Journal of Adaptive Control and Signal Processing, and is currently an associate editor for IEEE Transactions on Automatic Control and for the discipline's most important journal Automatica. He has been a program committee member for numerous international conferences, among them, American Control Conference and the Conference on Decision and Control in 2001 and 2002.. He has published five books, over 45 journal papers and book chapters, and over 95 conference papers on adaptive cotnrol, nonlinear control, multivariable control, optimal control, and control applications and robotics. He is a Senior Member of IEEE. His research has been supported by NSF, ARMY, NASA, MedQuest, SCEEE and Edison Power.



Klappentext

When an actuator fails, chaos or calamity can often ensue.

It is because the actuator is the final step in the control chain, when the control system's instructions are made physically real that failure can be so important and hard to compensate for. When the nature or location of the failure is unknown, the offsetting of consequent system uncertainties becomes even more awkward.

Adaptive Control of Systems with Actuator Failures centers on counteracting situations in which unknown control inputs become indeterminately unresponsive over an uncertain period of time by adapting the responses of remaining functional actuators. Both "lock-in-place" and varying-value failures are dealt with. The results presented demonstrate:

• the existence of nominal plant-model matching controller structures with associated matching conditions for all possible failure patterns;

• the choice of a desirable adaptive controller structure;

• derivation of novel error models in the presence of failures;

• the design of adaptive laws allowing controllers to respond to combinations of uncertainties stemming from activator failures and system parameters.

Adaptive Control of Systems with Actuator Failures will be of significance to control engineers generally and especially to both academics and industrial practitioners working on safety-critical systems or those in which full-blown fault identification and diagnosis is either too time consuming or too expensive.



Inhalt
1. Introduction.- 2. State Feedback Designs for State Tracking.- 3. State Feedback Designs for Output Tracking.- 4. Output Feedback Designs for Output Tracking.- 5. Designs for Multivariable Systems.- 6. Pole Placement Designs.- 7. Designs for Linearized Aircraft Models.- 8. Robust Designs for Discrete-Time Systems.- 9. Failure Compensation for Nonlinear Systems.- 10. State Feedback Designs for Nonlinear Systems.- 11. Nonlinear Output Feedback Designs.- 12. Conclusions and Research Topics.- A.1 Model Reference Adaptive Control.- A.1.1 MRAC: State Feedback for State Tracking.- A.1.2 MRAC: State Feedback for Output Tracking.- A.1.3 MRAC: Output Feedback for Output Tracking.- A.2 Multivariable MRAC.- A.3 Adaptive Pole Placement Control.- References.

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Produktinformationen

Titel
Adaptive Control of Systems with Actuator Failures
Autor
EAN
9781849969178
ISBN
1849969175
Format
Kartonierter Einband
Herausgeber
Springer London
Genre
Elektrotechnik
Anzahl Seiten
316
Gewicht
482g
Größe
H235mm x B155mm x T17mm
Jahr
2010
Untertitel
Englisch
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