Active Shimmy Damping Using Direct Adaptive Fuzzy Control
نویسندگان
چکیده
The shimmy phenomenon is a self-excited limit cycle oscillation occurring in many physical rolling systems, particularly in aircraft nose landing gears (NLG). This paper presents a new active damping controller developed in the context of the European DRESS (“Distributed and Redundant Electro-mechanical nose gear Steering System”) project for avoiding the shimmy oscillation. The controller based on the direct adaptive control approach, consists of two terms: the fuzzy adaptive term approximates the feedback linearization control law, and the stabilizing control term compensates the structural modelling error. The closed-loop system stability is proven by using Lyapunov theory. Simulation results corresponding to different test scenarios show that the proposed controller is able to effectively damp the shimmy phenomenon.
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