航空重力仪两级减振系统设计与研究  

Design and study of two-stage vibration reduction system of airborne gravimeter

作　　者：屈进红 王明 姜作喜 周锡华 段乐颖 QU Jinhong;WANG Ming;JIANG Zuoxi;ZHOU Xihua;DUAN Leying(MNR Key Lab of Airborne Geophysics and Remote Sensing Geology,Beijing 100083,China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Beijing 100083,China)

机构地区：[1]自然资源部航空地球物理与遥感地质重点实验室,北京100083 [2]中国自然资源航空物探遥感中心,北京100083

出　　处：《振动与冲击》2022年第11期97-103,共7页Journal of Vibration and Shock

基　　金：国家重点研发计划课题(2017YFC0601706,2017YFC0601705)

摘　　要：国内航空重力仪研制中,通常仅对仪器内部惯性测量单元搁置一层橡胶进行简单的隔振,航空重力仪直接搭载在飞机底板上。面对复杂多变的飞行环境,无法对飞机的高频振动做到有效隔离,从而影响航空重力仪的测量精度。根据振动理论分析和实测结果对相关的振动参数进行优化设计,研制出以橡胶海绵作为一、二级减振器的两级减振系统。试验结果表明,减振系统在三个定频测试中的振动能量衰减达到-60 dB左右,2~100 Hz扫频中的振动能量衰减约-46 dB,隔振效率都在99.5%以上,减振效果十分显著。In development of domestic airborne gravimeter,only a layer of rubber is laid on internal inertial measurement unit of the instrument for simple vibration isolation,and the airborne gravimeter is directly mounted on airplane floor.Facing complex and changeable flight environment,it is impossible to effectively isolate high-frequency vibration of an aircraft,and the measurement accuracy of airborne gravimeter is affected.Here,based on theoretical analysis and measured results of vibration,the optimization design was done for relevant vibration parameters to develop a two-stage vibration reduction system with rubber sponge as the primary and secondary dampers.The test results showed that the vibration energy attenuation of the vibration reduction system in 3 fixed frequency tests is about-60 dB,the vibration energy attenuation in 2-100 Hz frequency sweeping is about-46 dB;the system’s vibration isolation efficiency is more than 99.5%,so its vibration reduction effect is very significant.

关 键 词：航空重力仪 高频振动 减振系统 减振器 隔振效率 

分 类 号：O328[理学—一般力学与力学基础]