提高机械抖动激光陀螺抗振性能

Improving mechanically dithered RLG vibration performance

通过提升谐振腔抗光路变形能力,可以有效提高机械抖动激光陀螺的抗振动性能。对机械抖动激光陀螺振动中光路扭偏的产生机理进行了理论计算与仿真分析,分析结果表明,抖动切向惯性力和振动冲击惯性力是引起振动中光路扭偏的主要原因。通过振动中光路扭偏对振动性能影响的理论分析指出,减小振动附加上去的朗缪尔零偏,提高陀螺抗振性能的两大有效措施是减小工作电流和提高光路抗失谐能力。通过物理试验验证了振动中光路扭偏机理仿真分析的正确性。不同工作电流的振动对比试验表明,降低工作电流可显著提高陀螺的振动性能,这对于机抖激光陀螺振动特性的提升具有重要指导意义和工程实用价值。

Reducing the deviation of light path in cavity can improve mechanically dithered RLG vibration performance. The mechanism of the deviation of light path in the cavity of mechanically dithered RLG was analyzed and simulated. According to the results, the main reasons of light path deviation were dithered tangential inertial force and vibration impact inertial force. Meanwhile, the deviation of light path in cavity of RLG could change the RLG bias produced by Langmuir flow. The two main effective means of reducing Langmuir flow bias produced by vibration and improving gyro vibration performance were decreasing working current and improving stability of light path in cavity. The mechanism of mechanically dithered RLG light path deviation was validated by test. Compared with vibration test results of different working current, the vibration performance of RLG is improved obviously by reducing working current. The means of improving vibration performance by decreasing working current and increasing stability of light path is put forward, which is useful to improve vibration performance of mechanically dithered RLG and reform for the further development of RLG.