一种基于遥测信息的外弹道择优方法

为了解决航天靶场实时外测弹道人工拣择带来的不准确、不稳定、鲁棒性不强以及缺乏参考标准等缺点,以提高指控中心指挥决策的准确性和高效性,应用空间坐标变换理论和经典动力学理论分别构建了遥测角度同外测速度、遥测视加速度同外测加速度的关联模型,建立遥测信息同外测弹道信息的关系,提出了一种基于遥测信息的外测弹道择优方法。以某火箭理论弹道数据和理论遥测数据为输入,对遥测角度同外测速度、遥测视加速度同外测加速度的关联模型进行仿真验证,由仿真结果可知关联模型的误差很小,从而验证了关联模型的正确性。最后以火箭实际测量外测弹道数据、遥测参数信息为输入,应用弹道择优方法得出全局择优弹道,将全局择优弹道、其他局部外测弹道同事后高精度弹道进行比较,由比较结果可知全局择优弹道的综合误差最小,从而验证了择优方法的有效性和正确性。基于遥测信息的外弹道择优方法正确建立了某些关键遥测信息同外测弹道信息的关联模型,能够选择出精度较高的外测弹道,从而能够为指控中心提供更多的弹道择优辅助决策手段,具有较强的理论应用价值。

An Optimal Selection Method of External BallisticsBased on Telemetered Information

To overcome the inaccuracy,instability,lack of robustness and reference standards faults of artificial external-ballistics selection performed in real-time rocket launching,and improve the accuracy and efficiency of decision-making in control center,the coordinate transform theory and classical dynamics theory were applied,and the association models between the telemetry angle and the velocity,the apparent acceleration and the external acceleration in which the relationship between telemetry information and exterior ballistic information was established,were constructed respectively. A selection method of external ballistics based on telemetry information was proposed. Taking the theoretical trajectory and theoretical telemetry data of a rocket as data input,the correlation models between telemetry angle and external velocity,telemetry apparent acceleration and external acceleration were simulated and verified. The simulation results show that the error of the correlation model is very small,which verifies the correctness of the correlation model. Finally,taking the actual measured exterior ballistic data and telemetry parameter information of the rocket as the input,an optimal trajectory was obtained by using the trajectory optimization method. And then these trajectories including the optimal trajectory result were compared with the high-precision post-processing trajectory. The comparison results show that the comprehensive error of the optimal trajectory is the smallest,which verifies the effectiveness and correctness of the optimal method. By the external ballistics optimization method based on telemetry information,the correlation model between telemetry information and exterior ballistics information can be correctly established,and the exterior ballistics with high accuracy can be selected. Thus,the method provides more auxiliary decision-making means for trajectory optimization in control center,and has strong theoretical application value.