逆向递推估计全程弹道参数

针对试验中出现的初始段跟踪数据缺失情形,研究利用修正制导工具误差后的遥测数据转至发射系下弥补外测跟踪数据的逆向递推方法,给出了实际实现方案.从微分方程理论出发,推导了初始跟踪数据误差影响积分终值误差的结论.仿真计算给出了符合工程实际的全程弹道,并验证了误差理论分析的正确性,位置误差基本为初始位置偏差加上初始速度偏差的积分,速度误差为初始速度偏差加上一个小量.

Estimation of Overall Trajectory by Inverse Derivation

In the situation of missing tracking data in the initial time interval for some tests, the inverse derivation method to estimate overall tracking trajectory by using modified telemetry data after deducting the guidance instrumentation systematic error was studied. The realizing scheme was put forward. The conclusion that the initial tracking data error affects errors of integral results was obtained. The overall trajectory according with actual project was given by simulation, and the accuracy of theoretic analysis is validated. Posision error equals initial position error plus the integration of initial velocity error, and velocity error equals in- itial velocity error plus a small value.