A spatial non-cooperative target approach method based on predictive pursuit-flight game control

Abstract

The invention provides a space non-cooperative target approach method based on predictive pursuit and escape game control. For the space non-cooperative target with orbital maneuverability, the tracking spacecraft and its approach problem are modeled as the pursuit between the target and the tracking spacecraft. Escape game problem. Under the orbital coordinate system of the tracking spacecraft, a relative motion model is established; based on the model predictive control method, a discrete game model in the prediction time domain is obtained, and it is summarized as a maximum-minimum optimization problem with dynamic constraints and control constraints ;In the case of unknown target maneuvering strategy, the tracking spacecraft can improve the accuracy of target behavior prediction and the effect of target tracking by iteratively solving the optimal trajectory of the target and the corresponding maneuvering strategy. Because the model predictive control framework is adopted, the present invention can consider control constraints, and has strong robustness, and because the maximum and minimum optimization problems are transformed into multiple quadratic programming problems, the solution is simplified.

Description

technical field [0001] The invention relates to a method for approaching a space non-cooperative target orbit, in particular to a tracking spacecraft orbit control method based on a chase and escape game. Background technique [0002] In the process of recovering non-cooperative space targets, orbital approach operations are required. At present, the control research for this process only considers the estimable state of the target's free drift according to the orbit, for example: [0003] The document "Jagat A, Sinclair A J.Nonlinear Control for Spacecraft Pursuit-Evasion Game Using the State-Dependent Riccati Equation Method[J].IEEETransactions on Aerospace and Electronic Systems,2017,53(6):3032-3042." discloses A spacecraft chase-and-flight game method combined with state-dependent Riccati equations. The method expresses the nonlinear model as a state-dependent linear form, and combines the related theory of linear quadratic differential game to obtain the control strate...

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also does not take into account the control constraints

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