Abstract:

Aiming at the no-fly zone avoiding problem of reentry gliding vehicle （RGV）, a RGV guidance method based on the min-cost criterion is proposed. Based on the idea of graph theory, it introduces the judgement criterion of avoidance timing to achieve dynamic switching between guidance logic and avoidance logic. In the guidance logic, the segmented heading angle deviation corridor is designed based on the remaining range from the target point to improve the guidance accuracy. In the avoidance logic, the avoidance strategy and compensation strategy are designed. The avoidance cost and guidance cost of vehicle are quantified uniformly during avoidance, and the sign of bank angle is determined by the min-cost criterion. In order to reduce the energy loss, the bank angle changes adaptively by solving the amplitude of the bank angle at the time of just-avoidance. The heading angle deviation corridor is compensated adaptively to avoid the frequent reversal of the bank angle. This guidance method is designed to solve the decision problem when the avoidance task conflicts with the guidance task and when the multiple no-fly zones superimpose effects. Simulation results show that compared with the traditional methods, the proposed guidance method can avoid multiple no-fly zones with min-cost. The algorithm has higher guidance accuracy and good robustness.

Key words: prediction-correction method, min-cost criterion, adaptive heading angle deviation corridor, no-fly zone avoidance