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In order to make rationally use of the original data and improve the data fitting precision of the sine waveform, the owe period fast North-Seeking method of the polynomial interpolation is based on the least square method. According to the character of the large deflection north point data, the polynomial interpolation subdivision is carried out based the eighth data. fitting a quarter data. To owe period fitting of the quarter data of sinusoidal parameter. Use a certain type gyro as prototype. Through software simulation algorithm,the experimental results show that the algorithm reasonable use of the data, shortened the time for the north, improve the fitting accuracy. Introduction North seeking technology has been widely used in aerospace, mining, undersea tunnel, geographic mapping, energy exploration and military fields. The development direction of the current gyro theodolite is high precision, fast and full automation, but high precision and fast is often a pair of contradictory requirements. GYROMAT series gyro -theodolite of German DMT company representative the international advanced level[1-4], Can provide high accuracy and moderate precision and fast search three measurement modes. Domestic research on the precision of the north seeking algorithm is more mature, but the research on the rough north seeking is backward, relevant literature is relatively small [5,6].Literature[7]proposed a full azimuth fast forward method based on swing speed detection, Time and accuracy are greatly improved, the problem is that there is no theory and documentation to show whether the follow-up of the shell can be tracked on the gyro swing. Literature[8]proposed use of one-fourth-cycles to find out rough north, use the method of integral precision complex north of north. In this paper, the author studied mathematical models of gyro trail and gyro sensitivity of the trail, proposed a method is used to find the middle and low precision, based on increase the data quantity by polynomial interpolation, and then tuse the less period fitting method. Motion equation of gyro sensitive part Established the dynamics model of gyro sensitive parts, as shown in figure 1[9,10]. The gyro sensitive part is suspended from the O point of the instrument case through a suspension belt. O1 for the sensitivity of the center of gravity, the center of gravity O1 and the distance between the suspension point L is called the heart of high, mg for the sensitivity of the Ministry of gravity, HG for the gyro rotor moment of momentum. 6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer (MMEBC 2016) © 2016. The authors Published by Atlantis Press 1424 Fig. 1 Pendulous gyro dynamics model Fig.2 Curve of under period fitting Define the following parameters: The moment of inertia of the gyro is around Ox, Oy, Oz axis Jx, Jy, Jz (Jx does not include the moment of inertia of the gyro rotor, Jy = Jz); φ said instrument erection latitude; DB said torsion coefficient sling K=HG·ωe·cosφ, Omega phi, said North moment coefficient, D=DK+DB; Tracking method zero correction coefficient:λ1= DB / DK, non tracking method zero correction coefficient:λ2= DB / D; α0 said zero angle torque range sling. In a small angle, the small North case, motion equations of oscillation of gyro sensitive parts can be expressed as: 2

Owe Period Fast North-Seeking Method Based On Interpolation Of Polynomial