为了研究激光陀螺动态响应的幅频特性, 提出了一种利用激光多普勒测振仪对激光陀螺幅频特性测试的方法。由于激光陀螺角振动测量属于接触式测量, 测量结果易受被测物体振动频率的影响, 因此对其幅频特性的研究具有重要意义。实验中利用压电式角振动台产生正弦激励信号, 通过比较激光陀螺和激光多普勒测振仪对角振动台角振幅的测量值, 得到激光陀螺幅频特性曲线。实验结果表明: 在角振动频率低于300 Hz时, 激光陀螺测量值准确; 角振动频率较高时, 由于机械结构传递特性影响将导致激光陀螺对角振动台振幅测量失真。

A novel measurement method for the dynamic characteristic of ring laser gyroscope was proposed, based on a new laser Doppler vibrometer. The research on the dynamic characteristic of Ring Laser Gyroscope as a contacting system has important implications. A PZT angular vibration table was used to generate sine angular vibration, and the related measurement of the Ring Laser Gyroscope and the laser Doppler vibrometer were compared. The related experiments were conducted. Experimental results show that the property of transfer function of mechanism is a major factor affecting Ring Laser Gyroscope measure distortion under high frequency. The measurement of Ring Laser Gyroscope is accurate under low frequency and the amplitude frequency curve has been taken.