特大型桥梁动态变形监测中的单频BDS/INS融合方法研究

项目名称： 特大型桥梁动态变形监测中的单频BDS/INS融合方法研究

项目编号： No.41504032

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 天文学、地球科学

项目作者： 张秋昭

作者单位： 中国矿业大学

项目金额： 20万元

中文摘要： 卫星定位技术在特大型桥梁动态变形监测中发挥着重要作用。然而，现有桥梁监测多采用双频接收机，用于特大型桥梁全面监测成本较高；受车辆、桥塔，索缆遮挡，载波相位周跳与多路径现象严重，监测精度较低、可靠性不足。本项目以我国自主发展的卫星导航系统 BDS 与 INS 融合理论为研究对象，对桥梁监测环境中单频 BDS/INS 高精度融合定位理论进行基础科学研究。具体内容包括：1）基于车流信息、INS定位结果、桥梁先验变形信息及基线信息等多重信息约束下的高精度单频 BDS 单历元定位理论；2）桥梁监测环境下集成 BDS/INS 的紧组合自适应约束鲁棒滤波模型。项目的成功实施无论对BDS相关学科理论体系的完善和发展，还是对 BDS/INS 在构(建)筑物变形监测中的应用均具有重要的理论和实际意义。

中文关键词： 全球卫星导航系统；变形监测；精密定位

英文摘要： Research on the application of Chinese BeiDou navigation system (BDS) in extra big bridges deflections monitoring is very important for widespread application of BDS and bridge safety operation. However, the current GPS receivers are usually dual frequency GPS receivers which are very expensive. It is high cost to fully implement GPS in bridge overall monitoring. It also should be noticed that there are obviously carrier-phase cycle-slip and multipath delay due to bridge tower, stiffened cable and vehicles. In this proposal, we will focus on the research on single frequency BDS single epoch ambiguity resolution and BDS/INS integration for bridges deflections monitoring. The project includes following aspects: 1) single frequency BDS single epoch ambiguity resolution and positioning theory based on a priori multiple constrains information including INS navigation results, bridge deflection regularity and baseline information; 2) BDS/INS tightly-coupled constrain robust Kalman filtering model for bridges deflections monitoring. The successful implementation of the project not only can perfect and develop the related BDS data processing theory, but also can promote the implication of BDS/INS in other structure deformation monitoring, which is very important for the development of BDS.

英文关键词： Global Navigation Satellite System;Deformation Monitoring;Precise Positioning