嵌入式GIS导航系统中快速偏航算法的设计与实现  

A fast bias navigation arithmetic on embedded GIS platform

作　　者：胡泽明[1] 岳春生[1] 程娟[1] 

机构地区：[1]信息工程大学,郑州450002

出　　处：《测绘科学》2011年第4期164-165,168,共3页Science of Surveying and Mapping

摘　　要：诸如汽车拉力赛等特殊领域的车载导航系统中,需要在资源有限的嵌入式GIS平台上,满足地图快速刷新前提下实现偏航算法的实时性,为此本文改进了比较耗时的欧氏浮点距离计算公式,采用定点整型数描述空间位置,并用移位运算代替乘除计算。理论分析和测试结果表明,改进算法带来的相关误差符合导航需求,改进算法显著提高了一般偏航算法的实时性,满足了实时导航及偏航指示的应用需求。The vehicle-borne navigation application system of some special fields such as rally need to timely calculate the bias navigation with fast refreshing of maps on the limited resource of an embedded GIS platform. An improved arithmetic was put up in this article, including simplifying distance formula, using integer value recording space coordinate. At the same time, relative error coming from the improved arithmetic was discussed. It was shown that the arithmetic was high effective in speed by theory analysis and test data, meeting with the reahime navigation and bias navigation application requirements.

关 键 词：嵌入式GIS 导航系统 偏航 距离公式 

分 类 号：P208[天文地球—地图制图学与地理信息工程] P228[天文地球—测绘科学与技术]