Ahmed Jhinaoui

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In this paper, we focus on extending the subspace identification to the class of linear periodically time-varying (LPTV) systems. The Lyapunov-Floquet transformation is first applied to the system’s state-space model in order to get the monodromy matrix (MM) and, thus, a necessary and sufficient condition for system stability. Then, given two successive(More)
Works on the problem of helicopter ground resonance and the prediction of related instability zones relay generally on o -line modal analysis, neglecting thus the problem of model's uncertainties. In this paper, an on-line algorithm of detection, built on the CUSUM test, is proposed. A numerical application to simulation data is then reported. The(More)
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