This paper outlines a new concept for retrofitting a reconfiguration module to an existing control law. The concept is motivated by the need for low cost, add-on modules that improve air safety in the existing fleet of civil air transport vehicles. A direct adaptive approach that accommodates control surface nonlinearities is adopted, which uses a slowly adapting model of the closed-loop aircraft as the reference model. The motivation,benefits, and components of the architecture are detailed. In addition, the issues of control surface magnitude and rate saturation are addressed. A proof of stability is outlined for input-error adaptation when position and rate saturation are present. using an F/A-18 nonlinear simulator. The primary adaptive component is demonstrated

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Published on 01/01/1999

Volume 1999, 1999
DOI: 10.2514/6.1999-3964
Licence: CC BY-NC-SA license

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