机抖激光陀螺的磁电拾振技术

经分析指出,磁电拾振技术应用在机抖激光陀螺抖动反馈方案中,其工作原理属于速度型传感器,直接反映抖动偏频量。给出了磁电拾振器的误差因素和结构特点,并测试了磁电拾振器方案与压电陶瓷反馈方案的输出特性。对同一机抖陀螺分别使用以上两种抖动反馈方案;在静态测试零偏稳定性、抗振动和冲击能力中,前者皆好于后者。研究表明磁电拾振方案比压电陶瓷反馈或光电反馈方案更适合作为抖动反馈。

Magnetoelectric dither pick-up technology in mechanically dithered ring laser gyroscope

The paper presents the dither feedback which exploits magnetoelectric dither pick-up(MEDP) technology in mechanically dithered ring laser gyroscope. The deduced equation shows that MEDP is of speed transducer sensing biasing directly. The sense error factor and structure characteristic of MEDP were analyzed. The output voltage of MEDP and PZT feedback as a function of dither angle was studied experimentally. The static testing on bias stability, vibration and shock resistance show that the drift stability, the ability of vibration rejection and shock survivability by exploiting MEDP are better than that by exploiting PZT as dither feedback, respectively. As shown by our investigation, the MEDP is more suitable for dither feedback than for PZT feedback or optoelectronic feedback.