Optimal Placement of Base Stations in Falling Point Measurement at Sea

Abstract

The falling point accuracy of high-speed target at sea is an important test index for assessing performance of flight target in water-entry test. When the measurement error remains unchanged, the base station placement will affect the falling point accuracy. In this paper, we take the typical four-base station as an example and study the influence of regular and irregular placement of multi-base stations on positioning accuracy based on TDOA system. By changing the length of baseline and the form of distribution station, the measurement accuracy of falling point in different areas under the condition of regular distribution station is analyzed. For irregular distribution station, an optimal placement method of acoustic array based on simulated annealing algorithm is proposed, which takes the deviation as objective function and obtains the optimal placement according to the simulation of high temperature annealing process. The simulation results show that the new placement mode of base station can obtain higher positioning accuracy compared with the regular shapes of placement. That is, the optimized placement method based on Simulated Annealing algorithm is reasonable and effective, which can provide some references for high-speed moving target falling point measurement system design at sea.