提高陆地导航仪定位精度的一种新方法

在地面上测量车辆行驶距离的方法有两种:这就是利用里程计或加速度计.里程计测量车轮的转数并输出一系列脉冲,但里程计的刻度系数易受路况的影响,需要不断地进行修正,而加速度计具有短时间内高精度测量的优点.本文主要叙述了里程计与加速度计组合导航的设计原理、公式及数字仿真结果。

A New Method in Improving the Positioning Accuracy of Land Navigation Systems

Two kinds of sensors are in use for the measurement of the travelled distance of a vehicle, viz. the odometer and accelerometer. The odometer measures the number of revolution of the vehicle >wheel and outputs a series of TTL - compatible pulses. The scale factor is affected by the road conditions and therefore needs constant correction or updating. The accelerometer, however, has the advantage of being very accurate in short time measurements. The paper discusses the design principle, formulae and results of digital simulation of a new version of combinatory navigation making simultaneous use of the odometer and accelerometer.