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TECHNICAL BRIEFS

Oscillations in an Adaptive Aircraft Control System

[+] Author and Article Information
Larry S. Wisler

United States Navy

Edward R. Rang

Honeywell, Inc.

J. Dyn. Sys., Meas., Control 96(1), 100-101 (Mar 01, 1974) (2 pages) doi:10.1115/1.3426755 History: Received December 14, 1973; Online July 13, 2010

Abstract

An analog simulation of an adaptive control system showed small amplitude limit cycles when large input command signals were applied. These were explained by perturbation analysis on simplified versions of the systems. The conclusions were verified by the analog computation. The oscillations were shown to be an inherent feature resulting from the servo and actuator lags and the integrations in the gain-changing mechanization. A modification was made which eliminated the limit cycles.

Copyright © 1974 by ASME
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