一种提升空间三轴激光陀螺性能的谐振腔方案研究

针对现有空间三轴机抖激光陀螺因通道间放电耦合引入了零偏误差导致陀螺性能损失的问题,提出了一种高精度空间三轴谐振腔改进设计实现方案.该方案从空间三轴激光陀螺与单轴激光陀螺放电系统的差异出发,分析了空间三轴激光陀螺不同放电状态引入零偏误差的机理,明确了高精度空间三轴激光陀螺各通道的放电电流控制需求.同时,分析结果表明,减小通道间的放电耦合可降低该型陀螺的零偏耦合误差项,因此需对空间三轴谐振腔进行放电结构的去耦合优化设计.最后,针对提出的空间三轴谐振腔改进设计方案,开展了陀螺性能试验验证,试验结果表明,空间三轴机抖激光陀螺的精度提升了5.7％以上.

Research of a Resonator Scheme to Improve the Performance of Space Triaxial Laser Gyro

Aiming at the problem of the performance loss of the existing mechanically dithered space triaxial laser gyro due to the bias error caused by the discharge coupling between channels, an improved design and implementation scheme of high-precision space triaxial resonator is proposed. Based on the difference of discharge system between space triaxial laser gyro and single axis laser gyro, the mechanism of bias error caused by different discharge states of space triaxial laser gyro is analyzed, and the discharge current control requirements of each channel of high-precision triaxial laser gyro are defined. The analysis results show that reducing the discharge coupling between channels can reduce the bias coupling error term of the gyroscope, and it is necessary to optimize the discharge structure of the space triaxial resonator. Based on the improved design scheme of space triaxial resonator, the performance test is carried out. The test results show that the accuracy of space triaxial mechanically dithered ring laser gyro is improved by more than 5.7%.