目标机动加速度的估计与导引律实现

研究了寻的末制导过程的制导信息获取问题,并在此基础上对导引规律的实现进行了研究.针对末制导过程的非线性数学模型的特点,设计了高增益观测器,采用高增益反馈保证观测误差的快速收敛,利用导弹导引头提供的信息,对导引规律中需要的视线转率和目标机动加速度信息进行了估计,分析了观测器误差的收敛性.采用观测器方法进行制导信息的估计,将日标机动看作外部扰动输入,因而不需要建立目标的机动模型或对目标机动的统计特性进行假设.利用观测器获得的制导信息,对导引规律进行了实现,并证明了闭环制导回路的稳定性.最后进行了数值仿真,并对仿真结果进行了分析,验证了文中得出的结论.

Estimation of Target Maneuver Acceleration and Guidance Law Implementation in Homing Terminal Guidance

The estimation of guidance information was investigated for homing terminal guidance, based on which the researeh of the implementation of guidance law was conducted. For the nonlinear mathematie',d model of ten'ninal guidance, high-gain ob-server was designed, where the high-gain feedback guaranteed the rapid convergence of the observer error. The information of line-of-sight rate and target maneuver acceleration used in guidance law was estimated via the observer by using the information provid-ed by the missile seeker. The convergence of the observer error was analyzed. In the observer design, the target maneuver was viewed as external disturbance input, so it was not necessary to construct a target maneuver model in the design of the observer,and no statistical assumption was made on target maneuver. The guidance law was implemented by using the estimated signals pro-vided by the observer, and the stability of the closed-loop guidance system was proved. Numerical simulation was conducted, and the simulation results were analyzed, which verified the conclusions given in the paper.