低精度IMU辅助GPS跟踪误差分析和带宽设计  

Error Analysis and Bandwidth Design for Low-precision IMU Aided GPS Tracking Loop

作　　者：万文辉[1] 王可东[1] 姜锐[1] Wan Wenhui Wang Kedong Jiang Rui(School of Astronautics, Beihang University, Beijing 100191, China)

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《战术导弹技术》2017年第1期98-102,共5页Tactical Missile Technology

基　　金：国家自然科学基金(61573040)

摘　　要：首先,对INS/GPS超紧组合系统中PLL跟踪误差源进行了分析,将IMU引入的误差建模成与零偏有关的函数,然后根据实时测量的载噪比,设计迭代求解最优带宽的方法。仿真结果表明,针对低精度的IMU所提出的最优带宽设计方法能够有效提高其抗干扰能力和跟踪精度。Firstly,the error sources affecting the tracking performance of the phase lock loop are analyzed. Secondly,the tracking error from IMU is modeled as function of IMU bias. Then,a method to calculate optimal bandwidth iteratively is proposed according to the real time carrier to noise ratio. Simulations show that the proposed method can effectively improve the anti-jamming ability and tracking accuracy for tracking loop aided by low precision IMU.

关 键 词：超紧组合 环路带宽 跟踪误差 IMU 载噪比 

分 类 号：V249.328[航空宇航科学与技术—飞行器设计]