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在经典动基座飞行器制导工具系统误差分离中,原点误差不仅影响平台惯性系下的视速度,而且对外测发射系数据也有影响。若仍利用发射系数据进行误差分离,将无法扣除原点误差对外测数据的影响。因此,提出在DX2地心系下进行误差分离,由于地心系下的飞行数据是由测站系转换而来,故地心系下的外测数据不受原点误差的影响。鉴于地心系下误差方程的复杂性,文中利用进化策略方法分离误差,可简化公式推导。仿真计算结果表明:该方法能同时分离制导工具系统误差和原点误差,且分离结果不随原点误差的增大而明显变差。
In the system error separation of the guidance system of the classical movable base vehicle, the origin error not only affects the apparent velocity in the inertial system of the platform, but also affects the measured data of the launch system. If you still use the launch system data for error separation, will not be able to deduce the impact of origin error on the measured data. Therefore, it is proposed to separate the error under the geocentric system of DX2. Since the flight data of the geocentric system is converted by the station system, the data of the geocentric system is not influenced by the origin error. In view of the complexity of the error equation in the geocentric system, the article uses the evolutionary strategy to separate the error and simplify the derivation of the formula. The simulation results show that this method can separate the system error and the origin error of the guidance tool at the same time, and the separation result does not change significantly with the increase of the origin error.