基于双模预测的大气层内拦截弹中制导律研究

Midcourse Guidance Law Based on Dual Mode Prediction for Atmosphere Targets Interceptor

大气层内目标拦截弹的中制导过程除了要满足中末制导交班要求,还要满足多种控制和轨迹约束。针对该问题,首先建立基于虚拟目标的次最优常系数中制导律,再结合双模预测控制思想,提出一种新的双模预测中制导律,并通过模型变换和牛顿-辛普森算法的采用,简化在线计算量。所设计的预测导引律不仅能够显式处理状态和输入约束,还能在常系数次优化导引律的基础上进一步优化性能指标。仿真结果证实了该方法的有效性。

Apart from meeting terminal guidance handing over requirements, midcourse guidance process of atmosphere targets interceptor should meet many control and trajectory constraints. For this, a dual-mode predictive midcourse guidance law is proposed based on suboptimal constant parameter guidance law. Online computation is reduced by extending the model and introducing Newton-Raphson method solving the online optimization. The new predictive guidance law can not only display the processing status and input constraints but also further optimize the performance index. Simulation results show the validity of the new guidance law.