Reentry aircraft robust optimal guidance method based on model predictive control theory

Abstract

The invention discloses a reentry aircraft robust optimal guidance method based on a model predictive control theory. The reentry guidance problem is described as the optimal control problem, an idea of predicted correction is combined with the advantages of processing constraint and optimization in the model predictive control theory, and a guidance method capable of satisfying reentry optimality and robustness is formed. The reentry aircraft robust optimal guidance method can fully utilize the advantages of model predictive control in the aspects of route tracking and constraint processing so that the process constraint, tail end constraint and control constraint can be effectively solved in the guidance design process, and can satisfy the optimal performance index; the reentry aircraft robust optimal guidance method introduces the idea of predicted correction into the guidance strategy so as to increase the robustness of designed trajectory and guidance, predicts the future through applying the current state, compares the predicted value with an expected value, corrects a guidance command, and ensures the robustness of the reentry process; and the model predictive control theory and the idea of predicted correction are combined so that the robustness and optimality of reentry guidance can be well satisfied.

Description

【Technical field】 [0001] The invention relates to a robust optimal guidance method for a reentry vehicle based on model predictive control theory. 【Background technique】 [0002] The hypersonic re-entry vehicle system comprehensively utilizes the orbital maneuverability of the on-orbit vehicle and the characteristics of the gliding flight of the lifting body vehicle when it re-enters the atmosphere, and can perform long-range, fast and accurate delivery tasks. technology. [0003] In the process of realizing long-distance, fast and accurate delivery missions, due to factors such as complex environment, high dynamics of aircraft, mission robustness, and high-precision requirements, re-entry guidance has become its core technology. How to achieve high-precision, robust, and most Optimal reentry is the core issue of guidance for this type of vehicle, so it is very important to study high-precision robust optimal reentry guidance for hypersonic reentry vehicles. [0004] In th...

AI Technical Summary

Problems solved by technology

For the nominal trajectory guidance, due to the off-line generation of the optimal trajectory, the reentry lacks robustness, and the disturbance in the process will affect the reentry accuracy; for the predictive correction method, because this method reduces the optimal Due to the constraint of sexual conditions, the reentry process lacks optimality

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