Zhenqian Hou, Xiaogeng Liang/ Wenzheng Wang
International Journal of Aeronautical and Space Sicences, vol. 15, no. 1, pp.63-73, 2014

Abstract : For robust stability analysis of parameters uncertainty missiles, traditional frequency domain method can only analyze each channel respectively at several interval points within uncertain parameter space. Discontinuous calculation, couplings between channels will lead to inaccurate analysis results. A method based on ν-gap metric is proposed, which is able to evaluate the robust stability of missiles with uncertain parameters comprehensively, then genetic-simulated annealing hybrid optimization algorithm, which has global and local searching ability, is used to search parameters combination that lead to the worst stability within space of uncertain parameters. Finally the proposed method is used to analyze robust stability of a re-entry missile with uncertain parameters; the results verify the feasibility and accuracy of the method.

Keyword : parameter uncertainty; robust stability; ν-gap metric; hybrid optimization