摘要
提出了一种新模糊滤波法用于补偿磁罗盘测量值中的低频干扰。在此基础上 ,进一步提出了一种新的滤波方法 :模糊 -补偿滤波法 ,以消除磁罗盘测量值中各种干扰的影响。仿真表明 :在较长的时间内 ,采用模糊 -补偿滤波法的航迹推算系统的航向估值误差和位置误差均较小。
In automobile navigation system, a dead reckoning system is used to solve the problem of GPS signal blocking in urban areas. In order to meet accuracy and reliability requirements, the gyroscope and compass,both of which have low accuracy, are integrated to determine the vehicle heading in DR system. Such integration has been achieved by a complementary filter. However, it has been pointed out that it has no effect in removing long term compass measurement errors resulting from long term magnetic anomalies. To deal with this problem, the use of a fuzzy filter to compensate for long term errors is presented. Furthermore, a complementary fuzzy filter is constructed to remove both short term and long term errors. It is shown through simulation results that application of this complementary fuzzy filter results in smaller heading errors and position errors .
出处
《航空学报》
EI
CAS
CSCD
北大核心
2000年第4期299-302,共4页
Acta Aeronautica et Astronautica Sinica
关键词
模糊滤波
补偿滤波
航迹推算
汽车导航定位系统
fuzzy filter
complementary filter
dead reckoning system
compass
automobile navigation system
