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当车辆从已知的方格坐标基准点开出时,自备的陆地导航系统可以在行车期间自主地、连续地确定车辆现时的统一横轴墨卡托投影坐标。为此目的,博登湖仪器技术公司生产的FNA/FOA系列陆地导航系统,由不同类型常平架式陀螺航向基准装置(HRU)、测距传感器和含显示/控制装置的导航计算机组成。为了满足这类导航系统在性能(航向和导航精度)、操作(有自对准功能或无自对准功能)和成本等方面相互矛盾的要求,必须对最贵重的子系统,即陀螺航向基准装置加以研究。因此,本文对三种不同的航向基准装置(双常平架平台、单常平架平台和陀螺方向仪)的性能特点和性能数据进行了概述和对比。此外,还介绍了三种相应的导航系统的试验结果。这样,也就说明了一个高效陆地导航系统应如何设计才能满足现代的成本和性能要求。
When the vehicle departs from a known grid coordinate reference point, the own terrestrial navigation system can autonomously and continuously determine the current unified transverse Mercator projection coordinates of the vehicle during driving. To this end, the FNA / FOA series of terrestrial navigation systems manufactured by Bodensee Instruments Technologies consists of different types of gimbal gyro heliostat datum units (HRU), distance measuring sensors and navigation computers with display / control units. In order to meet the conflicting requirements of such navigation systems in terms of performance (heading and navigation accuracy), operation (with or without self-alignment function), and cost, the most expensive subsystem, the gyro heading reference Device to study. Therefore, this paper summarizes and compares the performance characteristics and performance data of three different heading reference devices (double gimbal platform, single gimbal platform and gyroscope). In addition, the test results of three corresponding navigation systems are also introduced. This shows how an efficient land navigation system should be designed to meet the modern cost and performance requirements.