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Given a set of H∞ design specifications, the issue is to check whether there exists a controller, whose order is free, which satisfies these specifications. The classical solution, which is based on Youla parametrisation and convex closed loop design, is not really satisfactory since it should use an infinite dimensional basis of filters, which cannot be(More)
Following the works presented in St Petersburg during the 16th IFAC Symposium on Automatic Control in Aerospace, Airbus has been working on the design and evaluation of more integrated control laws, taking into account multi-objectives design criteria, gathering from the very beginning the specifications in term of handling qualities, comfort, loads, and(More)
This paper describes the application of an indirect LFT (Linear Fractional Transformation) -based adaptive control scheme to a rigid transport aircraft, with emphasis on the lateral axis. The plant parameters, namely the stability derivatives, are estimated online using a Recursive Least Squares technique. A modal approach is used to directly synthesize the(More)
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