为解决兴趣点(Point of Interest, POI)一代分类体系编码复杂以及不可扩展的问题,引入了POI二代分类体系,该文详细介绍了POI二代分类体系编码方式,新的编码方式较POI一代分类优化了343个分类。本文也详细说明了POI二代分类体系升级方法...为解决兴趣点(Point of Interest, POI)一代分类体系编码复杂以及不可扩展的问题,引入了POI二代分类体系,该文详细介绍了POI二代分类体系编码方式,新的编码方式较POI一代分类优化了343个分类。本文也详细说明了POI二代分类体系升级方法,并且基于两套分类体系的特点,设计了POI一二代分类转换配置表和对应的转换原则。同时从POI数据库分类升降级、数据制作、数据转换3个方面进行统计差分,以验证POI二代分类体系升级方法的准确性和合理性。数据统计差分结果为POI二代分类体系的上线奠定了基础。展开更多
The principle of the inertial navigation system(INS) with rotating inertial measurement unit (IMU) is analyzed. A new IMU is established to rotate round each axis in three directions. Then, the related error model...The principle of the inertial navigation system(INS) with rotating inertial measurement unit (IMU) is analyzed. A new IMU is established to rotate round each axis in three directions. Then, the related error models for the designed system during rotating are deduced and the improved system is built. Finally, the performance simulation of the proposed system is provided. The simulation result indicates that the designed system can improve the accuracy of the roll and the pitch as well as heading by rotating three axes, thus guaranting the heading accuracy. Moreover, based on the principle of rotation at six different positions, such structure can carry out real-time calibration, and improve the system performance.展开更多
文摘为解决兴趣点(Point of Interest, POI)一代分类体系编码复杂以及不可扩展的问题,引入了POI二代分类体系,该文详细介绍了POI二代分类体系编码方式,新的编码方式较POI一代分类优化了343个分类。本文也详细说明了POI二代分类体系升级方法,并且基于两套分类体系的特点,设计了POI一二代分类转换配置表和对应的转换原则。同时从POI数据库分类升降级、数据制作、数据转换3个方面进行统计差分,以验证POI二代分类体系升级方法的准确性和合理性。数据统计差分结果为POI二代分类体系的上线奠定了基础。
基金Supported by the National Natural Science Foundation of China(60702003)~~
文摘The principle of the inertial navigation system(INS) with rotating inertial measurement unit (IMU) is analyzed. A new IMU is established to rotate round each axis in three directions. Then, the related error models for the designed system during rotating are deduced and the improved system is built. Finally, the performance simulation of the proposed system is provided. The simulation result indicates that the designed system can improve the accuracy of the roll and the pitch as well as heading by rotating three axes, thus guaranting the heading accuracy. Moreover, based on the principle of rotation at six different positions, such structure can carry out real-time calibration, and improve the system performance.