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Performance analysis of guidance laws based on timescale gap / Narayanachar Dhananjay in IEEE Transactions on control systems technology, Vol. 18 N° 3 (Mai 2010) 

Public ISBD [article]  in IEEE Transactions on control systems technology > Vol. 18 N° 3 (Mai 2010) . - pp. 574-590 Titre : Performance analysis of guidance laws based on timescale gap Type de document : texte imprimé Auteurs : Narayanachar Dhananjay, Auteur ; Debasish Ghose, Auteur ; M. Seetharama Bhat, Auteur Année de publication : 2011 Article en page(s) : pp. 574-590 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Guidance  laws  Nonlinear  systems  Proportional  navigation  Timescale  gap Index. décimale : 629.1 Résumé : An analytical treatment of performance analysis of guidance laws is possible only in simplistic scenarios. As the complexity of the guidance system increases, a search for analytical solutions becomes quite impractical. In this paper, a new performance measure, based upon the notion of a timescale gap that can be computed through numerical simulations, is developed for performance analysis of guidance laws. Finite time Lyapunov exponents are used to define the timescale gap. It is shown that the timescale gap can be used for quantification of the rate of convergence of trajectories to the collision course. Comparison between several guidance laws, based on the timescale gap, is presented. Realistic simulations to study the effect of aerodynamics and atmospheric variations on the timescale gap of these guidance laws are also presented. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208380 [article] Performance analysis of guidance laws based on timescale gap [texte imprimé] / Narayanachar Dhananjay, Auteur ; Debasish Ghose, Auteur ; M. Seetharama Bhat, Auteur . - 2011 . - pp. 574-590. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 3 (Mai 2010) . - pp. 574-590 Mots-clés : Guidance  laws  Nonlinear  systems  Proportional  navigation  Timescale  gap Index. décimale : 629.1 Résumé : An analytical treatment of performance analysis of guidance laws is possible only in simplistic scenarios. As the complexity of the guidance system increases, a search for analytical solutions becomes quite impractical. In this paper, a new performance measure, based upon the notion of a timescale gap that can be computed through numerical simulations, is developed for performance analysis of guidance laws. Finite time Lyapunov exponents are used to define the timescale gap. It is shown that the timescale gap can be used for quantification of the rate of convergence of trajectories to the collision course. Comparison between several guidance laws, based on the timescale gap, is presented. Realistic simulations to study the effect of aerodynamics and atmospheric variations on the timescale gap of these guidance laws are also presented. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5208380