Space collision threat mitigation

Aleksandar Zatezalo; Dušan Stipanović; Raman K. Mehra; Khanh Pham

doi:10.1117/12.2050663

20 June 2014 Space collision threat mitigation

Aleksandar Zatezalo, Dušan Stipanović, Raman K. Mehra, Khanh Pham

Proceedings Volume 9091, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIII; 90910H (2014) https://doi.org/10.1117/12.2050663
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

Mitigation of possible collision threats to current and future operations in space environments is an important an challenging task considering high nonlinearity of orbital dynamics and discrete measurement updates. Such discrete observations are relatively scarce with respect to space dynamics including possible unintentional or intentional rocket propulsion based maneuvers even in scenarios when measurement collections are focused to a one single target of interest. In our paper, this problem is addressed in terms of multihypothesis and multimodel estimation in conjunction with multi-agent multigoal game theoretic guaranteed evasion strategies. Collision threat estimation is formulated using conditional probabilities of time dependent hypotheses and spacecraft controls which are computed using Liapunov-like approach. Based on this formulation, time dependent functional forms of multi-objective utility functions are derived given threat collision risk levels. For demonstrating developed concepts, numerical methods are developed using nonlinear filtering methodology for updating hypothesis sets and corresponding conditional probabilities. Space platform associated sensor resources are managed using previously developed and demonstrated information-theoretic objective functions and optimization methods. Consequently, estimation and numerical methods are evaluated and demonstrated on a realistic Low Earth Orbit collision encounter.

Citation Download Citation

Aleksandar Zatezalo, Dušan Stipanović, Raman K. Mehra, and Khanh Pham "Space collision threat mitigation", Proc. SPIE 9091, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIII, 90910H (20 June 2014); https://doi.org/10.1117/12.2050663

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