影响多站时差定位精度的关键因素分析  

Key Factors Analysis of Multi-stations TDOA Passive Location Precision

作　　者：吴福平 邓皓 何建华[2] Wu Fuping;Deng Hao;He Jianhua(A VlC The First Aircraft Institute, Xi＇an 710089, China;Northwestern Polytechnical University, Xi＇an 710072, China)

机构地区：[1]航空工业第一飞机设计研究院,陕西西安710089 [2]西北工业大学,陕西西安710072

出　　处：《航空科学技术》2018年第5期32-37,共6页Aeronautical Science & Technology

摘　　要：为了提高多站时差定位精度,从其基本原理出发,建立了定位精度分布模型,通过计算机仿真分析,比较了定位过程中编队队形等关键因素对定位精度的影响。结果表明,当多站无源定位系统在指定区域执行任务时,可以采用"T"形与菱形编队来提高部分区域的定位精度;而当其对全方位大空域进行搜索监控时,更适合采用"Y"形编队来保证各方向上相同的定位精度;把主平台设置在编队队形的顶点时,主平台向左右方向的定位精度较高;在机载平台执行任务时,最好保持基线指向不变,而根据待定位标的空间方位实时改变基线长度,从而提高整个系统的定位精度。A kind of multi-stations TDOA passive location method and its Geometric Dilution of Precision （GDOP） have been introduced. The key factors, formation of the aircrafts, the leader aircraft choosing, the length and direction of the baseline, which affect the position accuracy have been compared by computer simulation analysis. The results show that： using ＂T＂ or rhombus formation for improving TDOA part of location accuracy when having a location task in a specified area; using ＂Y＂ formation for ensuring location accuracy in all direction when surveillance and searching allround and large airspace; in order to improving location accuracy, it＇ s essential to maintain the baseline direction and change the length of the baseline according to the real-time measured target angle.

关 键 词：无源定位 多站时差定位 队形编排 精度分析 

分 类 号：TN97[电子电信—信号与信息处理]