一种预测校正制导中攻角剖面的在线规划方法

An Online Optimization Method of the Attack Angle in Predictor-Corrector Guidance

提出一种预测校正制导中基于可达性量化评估的攻角剖面在线规划方法。首先采用最大纵程、最大横程、最小纵程3个关键参数构建可达区模型,并通过大量的离线弹道计算构建上述3个关键参数与升力修正因子、阻力修正因子和常值攻角的三维插值数据库。提出一种可达性量化因子用于反应期望终端位置的可达性。在飞行中对升力修正因子和阻力修正因子进行在线辨识,在攻角剖面的在线规划时以可达性量化因子最小为优化目标。仿真表明采用该方法可以获得较高的可达性判断正确率,攻角剖面的在线规划可以提高预测校正制导的成功率。本方法对于无动力升力式飞行器的制导策略在线决策和优化具有参考和应用价值。

An online optimization method of the attack angle in predictor-corrector guidance is raised based on quantitative accessibility evaluation. Firstly,the accessible area is modeled by 3 critical parameters including the maximum longitudinal range,the maximum cross range and the minimum longitudinal range.By offline calculation,a data base is obtained,which supplies the functions of these 3 critical parameters by changing with the lift force correcting factor,the drag force correcting factor and the constant attack angle.A quantitative factor is raised to evaluate the accessibility of the expecting terminal position. The lift force correcting factor and the drag force correcting factor are estimated during flight. The attack angle is optimized online to get the minimum quantitative accessibility factor. The simulation result shows that high accuracy rate of accessibility evaluation can be achieved and the success rate of predictor-corrector guidance can be also increased by online optimization of the attack angle. This method is valuable for guidance strategy online decision and optimization especially for lift vehicles.