外弹道测量多测速元数据融合同步修正方法

采用数据融合算法完成高精度外弹道测量对各测元时间同步有着严格的技术要求。在分析时间不同步对融合弹道测速精度的影响基础上,分析了引起无线电测速时间不同步的因素,并构建了有效的数学修正模型。针对融合弹道速度异常超差现象,依据对测速误差理论模型公式和无线电测速原理分析结果,提出基于各测量设备测速数据解算模型的积分点移位和传播延迟修正模型算法,并应用于潜射弹的数据融合同步修正。工程应用结果表明,融合弹道偏差优于0.04 m/s,较修正前精度提高了4倍以上。由于陆基无线电测量系统的测距、测角具有类似的时间不同步特征,因此该模型也可作为多测元融合弹道解算过程中的一般方法推广使用。

Synchronization modification method in multi-velocity-elements in exterior trajectory measurement based on data fusion

Using data fusion algorithm to complete the high-precision exterior ballistic measurement has strict technical requirements for the time synchronization of each measuring element. By analyzing the effect of time being not in synch on ballistic measurement precision of fusion, the factors resulting in time not synchronized of velocity measurment are discussed, and effective mathematic correction model is established. Aiming at phenomenon of the fusion ballistic velocity anomalies ultra difference, integral point shift and propagation delay correction model algorithm based on measurement equipment velocity data calculation model is proposed according to measurement error model formula and radio measurement results, and it is applied in synchronization correction of the sub projectile data fusion. The application results show that the integration of the trajectory deviation is better than 0.04 m/s, the accuracy is improved by more than 4 times. Because the distance and angel of subgrade radio measurement system have similar features of time being not in synch, the model can also be used as a general method in the processing of measurement element fusion trajectory calculation.