空间测量定位网络的典型布局

Typical deployments of workspace measurement and positioning system

空间测量定位系统在多站协同作用下实现测量,测站布局对系统测量精度、测量范围及使用成本影响很大。本文从wMPS网络布局和定位误差的关系入手,重点研究了测站分布几何对定位误差的影响。首先,建立了系统的定位误差模型,分析了测站单向通讯几何约束以及测站数目对改善测量精度的影响;然后,设计了两到四测站的多种典型布局形式,分析了典型布局的误差分布特性;最后,利用实验室样机对典型布局的误差特性进行了验证。实验结果表明,O_4型布局整体测量精度最高,L_3型布局对I_2型布局测量精度的增强幅度约为40%,O_4型布局对L_3型布局测量精度的提高幅度大部分处于20%以内。本文的研究为全局测量网络优化提供了有效的理论支撑。

Workspace measurement and positioning system works at multi station in a synergistic effect and how to deploy the stations has a significant impact on the measurement range, accuracy, and the use-cost. This paper explores the effect of the geometry of station distribution on position errors based on the relation between the wMPS network deployment and position errors. Firstly, a positioning er- ror model was established, the station one-way communication constraints were analyzed, and the im- provement of increasing the number of stations on measurement accuracy was analyzed. Then, typical deployments of two to four stations were designed and the error distribution characteristics were stud ied. Finally, the error characteristics of typical deployments were verified based on the latest proto- type in a lab. Experiment results show that 0_4 typical deployment has the highest accuracy, the measuring accuracy from the L_3 typical deployment is higher by 40G than that of the I_2 deploy- ment. Moreover, O 4 typical deployment has 20%o improvement on measuring accuracy than that ofthe L_3 typical deployment. The research work provides an effective theoretical support for global measurement network optimization.