Study On North-seeker Based On Fiber Optic Gyroscope

In this paper, a new kind of Gyro North-finder is researched. Compared with the traditional mechanical gyroscope, FOG has many advantages, such as high sensitivity, short start-up time, wide dynamic range, low cost, light weight and long life, and the FOG-based north-finder will be better than other scheme. With the continuous development of technology FOG, the North-finder based on FOG will be applicated more widely. The paper focused on design ways of Gyro North-finder, and the main work was carried out as follows:Firstly, the way of the north azimuth measurements was proposed and the errors that impacted the perfomance of Gyro North-finder was discussed whilst the working principle of FOG and north-finder system was introduced. In this way, the the relevant theoretical basis is established.Secondly, according to the functional requirements of the North-Finder, the software of the system control , the data collection and the data processing was designed with Object Oriented programming method. Combining the excellent programming ability of VC with the strong computation ability and data processing ability of MATLB the north-Finder calculation was completed in the programming environment of VC. And it simplified the procedure code greatly, increased the efficiency of software development and enhanced the reliability, the reusability and maintenance ability.Lastly, the best scheme of North-finder was established whilst the North-finder experiment was carried out in different ways and the experimental results were comparative analyzed. Meanwile, the experimental data of the Gyro North-finder system was filtered with the Wavelet Filter method and the validity of filtering was testified through north-seeking experiment.