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 measurement 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. [ABSTRACT FROM AUTHOR]