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激光陀螺长期工作或环境温度变化较大时有可能发生跳模现象,跳模会对陀螺的性能带来较大的影响。通过对激光陀螺相邻模的背向散射特性的分析,发现背向散射光强呈现周期性,且与工作模式之间存在严格的对应关系,由此得出激光陀螺跳模规律,即跳在相同的模式上陀螺性能前后没有明显变化,而跳在相邻模式上会引起陀螺锁区变大、零偏发生跳变,给性能带来较大影响。针对跳模规律提出了合理的跳模控制建议,并通过实验验证了上述结论。
Long-term laser gyroscope or environmental temperature changes may occur when the phenomenon of jump mode, jump mode will have a greater impact on the performance of the gyro. By analyzing the backscattering characteristics of adjacent modes of the laser gyroscope, it is found that the intensity of backscattering appears periodically, and there is a strict correspondence between it and the working mode. The law of jumping mode of laser gyroscope is obtained, The gyro performance in the same mode has no obvious change before and after, while jumping in the adjacent mode will cause the gyro lock region to become larger and the zero bias to jump, which will greatly affect the performance. Aiming at the law of jump mode, a reasonable proposal of jumping mode control is proposed, and the above conclusion is verified through experiments.