陆用捷联式静电陀螺找北仪的研究

The Research of ESG StrapdownNorth-Seeking Instrument for Field Survey

陆用找北仪应用广泛，它利用静电陀螺仪作为敏感元件组成捷联式找北仪，不仅结构简单，而且可以获得极高的找北精度。基于静电陀螺仪的特点，本文提出采用天文导航算法对方位角估计方法进行研究，并对方位角估计误差进行分析指出，利用实测高度角和计算高度角之差对陀螺漂移进行实时估计和补偿可以提高方位角的估计精度。

The north-seeking instrument working on land is widely used.Utilizing ESG as a sensitive element to make up a strapdown north-seeking instrument has the advantage for simplifying the construction and easily getting high accuracy.Base on the speciality of ESG, the use of astronavigation algorithm to estimate the azimuth angle is discussed and the estimation error is discussed also in this paper. It is pointed out that the drift of ESG can be estimated and compensated in real time by using the difference between the measuring data and the calculating data of the altitude angle,therefore the estimating accuracy of the azimuth angle can be enhanced.