多站纯距离系统站址布局优化研究

Research on sites distribution optimization of multi-station range-only system

针对多观测站纯距离系统站址布局对目标定位精度的影响问题,采用精度几何散布(GDOP)作为性能评估指标进行仿真试验,在比较分析三站不同站址布局定位性能的基础上,提出以maxS(GDOP<1)(GDOP小于1的有效区域最大)和GDOPmin最小或maxS(GDOP<1)/GDOPmin最大为优化目标,建立优化模型,并进行了仿真试验。仿真结果表明:通过优化模型可以优化布站分布角总和,且在布站分布角总和确定的情况下,布站半径越大,GDOP小于1的有效区域越大。

For the problem of sites distribution influence on target location precision of range-only system,the geometric dilution of precision(GDOP)is taken as the optimal performance indicator.After analysing the three stations location performance with different distribution,the sites distribution optimization model with objectives maximizing the effective surveillance region of the value of GDOP less than one and minimizing minimum GDOP is established.The simulation results indicate the sites distribution total angle can be optimized,and under optimal total angle condition,the bigger of the sites distribution radius,the larger of the effective region.