New results, fresh ideas and new applications in automotive and flight control systems are presented in this second edition of Robust Control. The book presents parametric methods and tools for the simultaneous design of several representative operating conditions and several design specifications in the time and frequency domains. It also covers methods for robustness analysis that guarantee the desired properties for all possible values of the plant uncertainty. A lot of practical application experience enters into the case studies of driver support systems that avoid skidding and rollover of cars, automatic car steering systems, flight controllers for unstable aircraft and engine-out controllers. The book also shows the historic roots of the methods, their limitations and research needs in robust control.

Robustness analysis addresses the question "Is a control system sufficiently stable under all admissible operating condtions?"

Robust Control (second edition) presents parametric methods and tools for control design catering for several representative operating conditions and design specifications simultaneously, thus reducing the performance effects of parameter uncertainty in both time and frequency domains. The author s graphical parameter space methods guarantee the desired properties for all possible values of plant uncertainty. These methods also help the reader to deal with unstructured disturbances being particularly well-suited for sequences of design steps each having a few uncertain parameters. Kharitonov and edge results and tree-structured decompositions deal with simple structures with many uncertain parameters. Scalar measurement for the distance from an instability and the robustness of sampled-data control are introduced.

In addition to a general large-scale rewriting and editing of existing material, the following specific changes are featured in the second edition:

new results, in particular on frequency-domain specifications for unstructured uncertainties and disturbances, on PID controller design and on singular frequencies;

new chapters dealing with novel applications in car steering (skid and rollover avoidance and automatic steering) and flight control (flutter suppression and engine-out control for unstable aircraft in divers operating conditions);

streamlined more didactic presentation;

author-created downloadable Paradise MATLAB(r) toolbox with detailed commentary in an appendix.

Requiring only an undergraduate background in feedback control, Robust Control (second edition) keeps the mathematics of an important subject simple. The book shows mechanical and electrical engineers who have to design robust mechatronic systems how to adapt its new tools to solve their problems and its solid theoretical development based on historical foundations will be of profit to the control systematician."

The first German edition of this book appeared in 1972, and in Polish translation in 1976. It covered the analysis and synthesis of sampled-data systems. The second German edition of 1983 ex tended the scope to design, in particular design for robustness of control system properties with respect to uncertainty of plant parameters. This book is a revised translation of the second Ger man edition. The revisions concern primarily a new treatment of the finite effect sequences and the use of nice numerical proper ties of Hessenberg forms. The introduction describes examples of sampled-data systems, in particular digital controllers, and analyzes the sampler and hold; also some design aspects are introduced. Chapter 2 reviews the modelling and analysis of continuous systems. Pole shifting is formulated as an affine mapping, here some n w material on fixing some eigenvalues or some gains in a design step is included. Chapter 3 treats the analysis of sampled-data systems by state space and z-transform methods. This includes sections on inter sampling behavior, time-delay systems, absolute stability and non synchronous sampling. Chapter 4 treats controllability and reach ability of discrete-time systems, controllability regions for con strained inputs and the choice of the sampling interval primarily under controllability aspects. Chapter 5 deals with observability and constructability both from the discrete and continuous plant output. Full and reduced order observers are treated as well as disturbance observers."

Organized by Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt (DFVLR)

Robuste Regelung stellt einen fur die praktische Umsetzung wichtigen Aspekt der Regelungstheorie dar. Sie gibt Auskunft, ob die Einschwingvorgange linearer Regelsysteme rasch abklingen. Dies ist wichtig bei realen Systemen, bei denen sich starke AEnderungen der Betriebsbedingungen einstellen, in der Praxis z.B. bei einem Kran mit variabler Seillange oder Lastmasse, aber auch bei einem Flugzeug, das mit verschiedenen Geschwindigkeiten in verschiedenen Hoehen fliegt. Robuste Regelung von Jurgen Ackermann liefert den neuesten Stand der Verfahren zur Robustheitsanalyse. Es werden Entwurfswerkzeuge (Parameterraum-Verfahren, Gutevektor-Optimierung) vorgestellt und auf die Regelung praktischer mechanischer Systeme aus Automobil- und Luftfahrttechnik angewendet. Angesprochen sind in erster Linie Ingenieure der Elektrotechnik und des Maschinenbaus.

Fur die Analyse und Synthese von Abtastsystemen werden Zustandsdarstellungen und z-Transformation eng miteinander verknupft, so dass die Vorteile beider Darstellungsweisen voll zum Tragen kommen. Die Polvorgabe beim Entwurf von Beobachtern und Zustandsvektor-Ruckfuhrungen wird ausfuhrlich dargestellt. Daneben werden auch Frequenzbereichverfahren behandelt. Die Grundlagen der Robustheits-Theorie sind in der 3. Auflage voll in den gesamten Text integriert. Fur das Parameterraumverfahren zum Entwurf robuster Regelungen steht weiterhin Band II der zweiten Auflage zur Verfugung. Speziell auf Abtastsysteme ausgerichtet sind Abschnitte uber die Wahl der Tastperiode, nichtsynchrone und nichtideale Abtastung, Verhalten zwischen den Abtastzeitpunkten, Abtastsysteme mit Totzeit, absolute Stabilitat diskreter Systeme mit Stellglied-Nichtlinearitat und Folgen mit endlicher Systemantwort (FES). UEber die vom Autor entwickelte Theorie der FES wurde ein neuartiger Zugang zu den strukturellen Eigenschaften (Invarianten) und zum Entwurf von Mehrgroessensystemen geschaffen. In der Neuauflage werden nun auch die damit zusammenhangenden numerischen Probleme mit Hilfe von Hessenberg-Transformation behandelt. Neu ist auch ein Abschnitt uber die Stabilitat von Intervallsystemen.