考虑禁飞区规避的预测校正再入制导方法

Predictor-corrector reentry guidance satisfying no-fly zone constraints

针对升力式高超声速飞行器再入滑翔侧向制导问题,提出了一种考虑禁飞区规避的预测校正制导方法.纵向制导采用落点误差预测与指令校正相结合的方式,不断更新倾侧角的幅值,实时修正轨迹纵程.侧向制导设计了一种倾侧角反转逻辑的切换机制,利用航向角误差走廊和航向角导向区域控制飞行器的侧向运动.CAV-H再入滑翔飞行器制导仿真实例表明,该方法不依赖于标准再入轨迹,能够导引飞行器规避禁飞区约束.Monte Carlo仿真验证表明,在随机初始扰动和误差存在的情况下,该制导方法具有良好的鲁棒性.

To enforce the lateral maneuverability of the reentry gliding flight, a predietor-eorrector guidance method satisfying the no-fly zone constraints was proposed for the lifting hypersonic reentry vehicles. First, the longitudinal guidance was developed by the prediction of the landing error and the correction of the guidance command. The downrange was modified in real time by updating the magnitude of the bank angle. Then, a new handoff mechanism for the bank angle reversal logic was designed for the lateral guidance. The maneuver of the lateral motion was performed by employing the heading angle error corridor and the heading angle orienting area. Based on the CAV-H model, the numerical simulations show that the no-fly zone constraints can be satisfied by the predictor-corrector guidance method which is independent of the standard reentry trajectory. The Monte Carlo simulation results of the reentry gliding guidance with random initial dispersions and errors also demonstrate the robustness of the proposed algorithm.