| 激光干涉绝对重力仪参考棱镜隔振系统仿真 |
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| 引用本文： | 张兵,滕云田,邢丽莉,吴琼,程丽娜,张涛.激光干涉绝对重力仪参考棱镜隔振系统仿真[J].地球物理学报,2017,60(11):4221-4230. |
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| 作者姓名： | 张兵 滕云田 邢丽莉 吴琼 程丽娜 张涛 |
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| 作者单位： | 1. 中国地震局地球物理研究所, 北京 100081;2. 防灾科技学院, 河北三河 065201;3. 中国地震应急搜救中心, 北京 100049 |
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| 基金项目： | 中国地震局地震科技星火计划项目（XH15066Y）和国家自然科学基金项目（41404062）共同资助. |
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| 摘 要： | 在激光干涉绝对重力仪中,参考棱镜在背景振动和系统自振的作用下呈现复杂的振动模式,严重影响了整机的测量准确度.针对此问题,本文基于磁悬浮原理设计了参考棱镜的反馈式两级振动隔离系统,建立了系统的动力学模型,在不同的反馈方式下推导了相应的传递函数,进行了Matlab仿真分析以确定最优的反馈方式.系统仿真结果表明绝对速度反馈方式的隔振效果可达100 dB,与自主研发的Age-110型激光干涉绝对重力仪的联合测试结果表明,该隔振系统可将Age-110的测量精度再提高1.5倍.
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| 关 键 词： | 绝对重力仪 参考棱镜 隔振 磁悬浮 |
| 收稿时间： | 2016-12-23 |
The simulation of reference corner cube vibration isolation system of laser interference absolute gravimeter |
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| ZHANG Bing,TENG Yun-Tian,XING Li-Li,WU Qiong,CHENG Li-Na,ZHANG Tao.The simulation of reference corner cube vibration isolation system of laser interference absolute gravimeter[J].Chinese Journal of Geophysics,2017,60(11):4221-4230. |
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| Authors: | ZHANG Bing TENG Yun-Tian XING Li-Li WU Qiong CHENG Li-Na ZHANG Tao |
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| Institution: | 1. Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;2. Institute of Disaster Prevention, Sanhe Hebei 065201, China;3. National Earthquake Response Support Service, Beijing 100049, China |
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| Abstract: | In laser interference absolute gravimeter, the vibration mode of the reference corner cube is very complicated because of the self-vibration and background vibration so as to affect the measuring accuracy of gravimeter seriously. To solve the problem above, a feedback two-stage vibration isolation system was designed based on the magnetic suspension principle in the paper. Additionally, the kinetic model of the vibration system was established, through which different transfer functions were derived in different feedback modes and simulated and analyzed using Matlab. The simulation results show that the vibration isolation efficiency of the absolute velocity feedback is about 100 dB. The measurement results with Age-110 laser interference absolute gravimeter show the vibration isolation system can increase the precision of the laser interference absolute gravimeter by 1.5 times. |
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| Keywords: | Absolute gravimeter Reference corner cube Vibration isolation Magnetic suspension |
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