Abstract
Flutter is a critical instability phenomenon for aircrafts. In previous investigations, the authors have proposed several online statistical subspace-based algorithms for flutter monitoring. Each algorithm monitors some stability criterion (damping, flutter margin…) w.r.t. a fixed reference flight point using the online Cusum test. The drawback of this technique is that the flutter detection corresponds to a light trend of the criterion toward instability and thus the estimated flutter airspeed is conservative. In this paper, a new moving reference version is proposed which intends to give a better estimation of the flutter airspeed. Application on simulation data shows the relevance of the new algorithm.
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