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Frequency-based controller design for a class of nonlinear systems

โœ Scribed by Minesh A. Shah; Matthew A. Franchek

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
178 KB
Volume
9
Category
Article
ISSN
1049-8923

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โœฆ Synopsis

Presented in this paper is a frequency-based controller design methodology for a class of nonlinear systems that can be characterized by a class of Hammerstein models. The controller design is directed toward the disturbance rejection problem where the output performance speci"cation appears as a time domain tolerance. The controller design process is executed in three stages. First, the system nonlinearities are quasilinearized via describing function techniques. Second, the design methodology enforces a time domain tolerance "y(t)") via frequency domain constraints on the quasilinearized closed-loop system. Finally, the controller is designed via classical loop shaping of the quasilinearized system on the open-loop gain-phase plane. The design process is illustrated on the idle speed control of a Ford 4.6L-2 valve V-8 fuel injected engine.

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