高动态环境下GPS/INS超紧组合导航研究

Research on GPS/INS Ultra-Tight Integration in High-Dynamic Environment

随着信息技术的发展,组合导航越来越受重视。随着研究的不断深入以及工程需求的提出,对组合导航的综合性能要求也越来越高。高动态将导致信号跟踪性能下降,进而导致导航精度降低,甚至卫星失锁。松、紧组合在高动态中会出现误差累计和循环滑动,本文介绍了超紧组合,并结合其特点给出模型,针对高动态引起的问题提出相应的超紧组合模型。仿真结果显示,与传统的组合导航比较,在高动态环境中超紧组合能在较少的解算时间内精确导航。

The current century is the era of rapid development of information technology, and integrated navigation which depends on the development of information technology is focused increasingly, which leads to more and more requirement in comprehensive application of integrated navigation . The performance of tracking loop can be downgraded in platform in high-dynamic environment, which can reduce precision of navigation and even bring intense error. Loose coupling and tight coupling can demonstrate error accumulation and heavy calculation respectively in high-dynamic environment. The ultra-tight integration feature is introduced in this paper, and model and calculation process are demonstrated in high-dynamic environment. Several models of ultra-tight integration are proposed due to the arising problem in high-dynamic environment. The result shows that ultra-tight integration can navigate accurately with less time by comparing high-dynamic navigation with tradition navigation.