类GPS超声定位系统及其定位精度分析  

Quasi-GPS ultrasonic ranging system and its location precision analysis

作　　者：程晓畅[1] 苏绍景[1] 王跃科[1] 

机构地区：[1]国防科技大学机电工程与自动化学院仪器系,长沙410073

出　　处：《声学技术》2007年第4期632-636,共5页Technical Acoustics

摘　　要：针对常规超声局部定位系统的缺陷,介绍了类GPS超声定位系统及其工作原理。通过多基站距离估计算法获得定位物体与观测基站的估计距离后,详细推导了Gauss-Newton迭代定位算法并对其定位精度作了分析。理论分析表明,定位物体的定位精度与物体在空间中的位置和基站的几何布局有关。若基站几何布局已定,为获得较高的定位精度,应根据物体所在空间中的不同位置选择定位基站。根据PDOP(平面位置精度因子)在定位空间中的分布图,给出了以三个及以上基站进行定位时的基站选择原则。最后通过仿真验证了上述分析的正确性。In view of the deficiencies of conventional ultrasonic ranging systems,Quasi-GPS ultrasonic rang-ing system and its work principle are introduced.After the estimated distances between the object to be located and the base-stations are obtained with a multiple base-stations distance estimation algorithm,the Gauss-Newton iterative location algorithm and its location precision are analyzed.It is proved by theore-tical analysis that the location precision is relevant to the object＇s location and the geometrical layout of the base-stations.In order to obtain better location precision after the geometrical layout of the base-sta-tions has been decided,we should select different location base-stations according to the object′s location in ranging space.The location base-stations selection principle using three or more base-stations for loca-tion is presented based on the PDOP geometrical distributing figure.Simulation shows that the above an-alysis is reliable.

关 键 词：类GPS 超声定位 Gauss-Newton迭代 定位精度 

分 类 号：TJ434.1[兵器科学与技术—火炮、自动武器与弹药工程]