| 摘要 |
PURPOSE:To eliminate a tracking operation due to a variation component, and to execute a stable azimuth measurement by supplying two electric powers each different in frequency from two power sources, selecting an azimuth deviation signal of inside and outside spheres and a disturbance component signal by a relative inclination, and eliminating them. CONSTITUTION:Electric power of frequency f1 is supplied from a power source E1, a gyro sphere formed by inside and outside spheres 1, 2 is driven, and a disturbance component signal by a relative inclination of the inside and outside spheres 1, 2 is outputted through outside sphere detecting electrodes 5, 7. On the other hand, a bearing deviation signal of the inside and outside spheres 1, 2 is outputted through the same electrodes 5, 7 by supplying electric power of f2>f1 of frequency f2 from a power source E2. These bearing deviation signal and disturbance component signal are selected by an HPF 11 and an LPF 17, and become a servo-signal from which influence of a disturbance component by an inclination of the inside and outside spheres is eliminated substantially, through a negative feedback gain controller 19 and an adder 13, etc. Accordingly, a tracking operation by a variation component is eliminated, and a stable azimuth measurement can be executed. |
