Error Analysis of Measuring Water Entry Point for Rocket-Assisted Torpedo

Absence of buoys used for hydroacoustic localization in sea trial may reduce measurement accuracy of water entry point of a rocket-assisted torpedo. In this paper, the preset buoy array for measuring water entry point of a rocket-assisted torpedo is simulated with the software Matlab, and the effect of absence of some buoys on measurement accuracy of water entry point is analyzed. The results show that when absent buoys and buoy array reach to the lower limit, i.e. 4 of 12 buoys are absent and the buoy array is asymmetric, the measurement accuracy will decrease rapidly. Therefore, if the topology of preset buoy array does not satisfy the lower limit, the array must be adjusted.