量测最小分辨率特性下自主相对导航设计方法  

Autonomous relative navigation constrained by minimum measure resolution

作　　者：周朝霞[1] 任家栋[2,3] 曾庆双[2] 黄云鹰[1] 

机构地区：[1]厦门大学嘉庚学院,福建厦门363105 [2]哈尔滨工业大学航天学院,哈尔滨150001 [3]上海航天控制技术研究所,上海200233

出　　处：《哈尔滨工业大学学报》2015年第3期49-53,共5页Journal of Harbin Institute of Technology

摘　　要：为抑制量测最小分辨率特性对导航滤波产生的振荡特性,建立了准确的量测模型,提出导航系统自适应变步长设计方案,并理论上分析对比了该方案与工程上常用的低带宽设计方案的滤波性能.分析表明,随着滤波带宽的降低,系统的常偏及白噪声误差反比例增大,收敛时间变长;该较低带宽设计大幅降低标称系统性能损失.仿真表明,该设计相对速度滤波精度为2E-3 m/s(3σ),使较低带宽设计提高一个数量级,满足高精度卫星编队飞行的任务需求.In order to suppress the oscillation characteristics of relative navigation system caused by minimum measure resolution, an accurate microwave measure model is developed, and an adaptive step-size filtering algorithm is presented in the paper; Performance analysis and comparison between the adaptive step-size filtering algorithm and the low-bandwidth design algorithm widely used in the project is made. The theoretical comparison result indicates that the bias and random error increases inversely with the decreasing of filtering bandwidth, and convergence process becomes longer, but the adaptive step-size filtering algorithm largely reduces the performance loss. Simulation result shows that the relative velocity estimation error is 2E - 3 m/s（3σ）, which is reduced by one order of magnitude compared with the relative velocity estimation error of low bandwidth method, and can satisfy the mission requirements for high precision satellite formation.

关 键 词：卫星编队 滤波 相对导航 振荡特性 低带宽 自适应 

分 类 号：V448.21[航空宇航科学与技术—飞行器设计]