柔性基线下机载分布式SINS/GPS组合测量系统离线传递对准方法研究

项目名称： 柔性基线下机载分布式SINS/GPS组合测量系统离线传递对准方法研究

项目编号： No.61473020

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 自动化技术、计算机技术

项目作者： 宫晓琳

作者单位： 北京航空航天大学

项目金额： 75万元

中文摘要： 集成多种或多个遥感载荷的分布式综合对地观测系统已成为空基对地观测的重要发展方向，迫切需要建立基于分布式SINS/GPS组合的时空基准系统，以同时实现多节点的高精度运动参数测量。由于机体弹性变形下各载荷间的空间距离（基线）呈复杂柔性变化，且实际环境存在多源随机干扰，SINS/GPS组合系统呈现出非线性、噪声非高斯、模型不确定等特性，此时如何实现主系统与各子系统之间的高精度传递对准，是SINS/GPS组合测量研究面临的新挑战。本项目针对上述特性，以及离线处理拥有全部观测数据的特点，进行主、子系统间柔性基线统一构型建模，建立更加精确的高阶、非线性误差模型；在此基础上，融合所有系统的观测信息，提出主系统与多个子系统间的高精度离线传递对准估计方法，并进行仿真和初步实验验证。预期成果将为建立分布式SINS/GPS组合测量系统提供理论和技术基础，为我国高精度大地测量和高分辨率分布式遥感提供技技术储备。

中文关键词： 分布式测量；SINS/GPS组合；误差建模；传递对准；组合估计

英文摘要： Synthetical earth observation system integrating multiple remote sensing load has become an important development direction of space-based earth observation, which urgently need to build the space-time-based systems based on distributed SINS/GPS integration in order to achieve multi-point motion parameters measurement with high accuracy. Because the spatial distance between loads under elastic deformation of aircraft (baseline) changes flexibly and there exists multi-source random interference in the physical environment, SINS/GPS integration system presents characteristics such as nonlinearity, non-Gaussian noise and model uncertainty. How to transfer the high-precision information of the main system to subsystems is the new challenge of distributed SINS/GPS integrated estimation. Based on the mentioned characteristics and the feature that all observation data is available in post-processing, this program builds a flexible baseline unified-configuration model between main system and subsystems, and establishes a high-order, nonlinear error model with higher accuracy. On this basis, the program integrates observation information of all the systems, proposes a high-precision offline transfer alignment estimation method, and then achieves the simulation and preliminary experimental verification. Expected results will provide theory and technical basis for building distributed SINS/GPS integrated measurement system and technical reserves for our high-resolution distributed earth observation.

英文关键词： distributed measurement;SINS/GPS integration;error modeling;transfer alignment;integrated estimation