磁罗盘误差分析及补偿

To Analyze and Compensate Errors of Magnetic Compass

磁罗盘已被广泛地应用在民用及军事领域,误差补偿是磁罗盘研究中的一个关键技术.在分析磁罗盘误差的基础上,主要针对对磁罗盘影响最大同时最难控制的磁罗差,提出了一种基于BP网络的补偿方法,并建立以测量航向角为输入、补偿后航向角为输出的三层BP网络模型.实验证明,用该方法可以较好地补偿磁罗差且补偿后航向误差均方差仅为0.39255.

Magnetic Compass can be widely used in civilian and military fields, the key technology of magnetic compass is error compensation. This paper analyses errors of magnetic compass firstly, and then,presents a new compensation algorithm based on BP network which is utilized to compensate magnetic deviation mostly. Further, a three layers BP network which input is measured heading and output is compen-sated heading is set up. The result shows this compensation algorithm can compensate magnetic deviation preferably and the mean variance of heading error is only 0. 392 55 after compensation.