横程动态约束的预测-校正再入制导方法  

Predictor-Corrector Reentry Guidance with Crossrange Dynamic Constraint

作　　者：张科[1] 石国祥 王佩[1] ZHANG Ke;SHI Guo-xiang;WANG Pei(School of Astronautics,Northwestern Polytechnical University,Xi'an 710072,China;Xi’an Institute of Space Radio Technology,Xi’an 710100,China)

机构地区：[1]西北工业大学航天学院,西安710072 [2]空间电子信息技术研究院,西安710100

出　　处：《宇航学报》2020年第4期429-437,共9页Journal of Astronautics

基　　金：装备预研航天科技联合基金(6141B062202203)。

摘　　要：针对大升阻比飞行器再入滑翔制导问题,基于预测-校正制导法,提出一种横程动态约束的侧向制导策略。利用再入过程中横程与剩余航程的近似线性关系,设计边界约束动态变化的横程走廊控制倾侧角反转。对大气密度和飞行器气动参数扰动引起的预测模型不确定性进行在线参数估计。以CAV-L高超声速飞行器为研究对象,进行再入制导仿真。结果表明,对不同航程的再入任务该制导法均能精确引导飞行器飞向目标,侧向制导倾侧角反转时机分布合理,反转次数少。Monte Carlo仿真校验了横程动态约束制导法对再入状态误差和过程扰动具有良好的自适应性和鲁棒性。For the reentry glide guidance of high lift-to-drag ratio vehicles, a lateral guidance strategy with crossrange dynamic constraints is proposed based on predictor-corrector guidance. By using the approximate linear relationship between crossrange and range-to-go in the reentry process, a crossrange corridor with dynamic boundary constraint is designed to control the bank angle reversals. The disturbance of atmospheric density and aerodynamic parameters which causes the uncertainty of predictor model is estimated online. The CAV-L, a kind of hypersonic vehicle, is used as the research object to carry out the reentry guidance simulation. The results show that the guidance method can accurately guide a vehicle to a target for reentry mission with different ranges, the distribution of bank reversal occasion is appropriate, and the reversals are fewer. The Monte Carlo simulations verify that the crossrange-dynamic-constraint guidance has good adaptability and robustness to the initial reentry errors and process disturbances.

关 键 词：再入制导 高超声速飞行器 预测-校正制导 侧向制导 横程约束 

分 类 号：V448.23[航空宇航科学与技术—飞行器设计]