摘要
由于勘探目标体的二次场信号微弱,航空电磁探测系统必须具有良好的隔振降噪性能才能获取高质量的深部目标体低频信号.基于气动传动的概念,构建了气缸式气动隔振系统.建立了基于热力学和空气动力学的非线性动力学模型.利用MATLAB/Simulink对其动态性能进行仿真,对其振动的时域和频域特性进行仿真分析,气动悬架的固有频率可低至0.5 Hz,共振点的幅值比小于1.8.研究了附加气室体积和节流孔横截面积对其隔振性能的影响,为设计参数的优化选择提供了理论指导.航空电磁探测系统室内试验和飞行试验及其仿真结果表明,气缸式气动隔振系统具有良好的隔振性能,能够快速衰减和有效隔离较大的振动,可以满足航空电磁探测系统对隔振的要求.
Because the secondary field signals of the exploration target are faint,the airborne electromagnetic exploration system must have excellent vibration isolation and noise reduction performance to collect High quality low frequency signal of deep target satisfactorily.The cylinder-type pneumatic vibration isolation system is constructed based on the pneumatic transmission concept.The nonlinear dynamic model is established based on thermodynamics and aerodynamics.Matlab/Simulink is used to simulate its dynamic performance so that the time domain and frequency domain characteristics of its vibration are simulated and analyzed.The resonance frequency of the pneumatic suspension can be as low as 0.5 Hz,and the amplitude ratio of the resonance point is less than 1.8 The influence of the auxiliary chamber volume and orifice area on its vibration isolation performance is investigated,providing theoretical guidance for the optimal selection of design parameters.The simulation and laboratory experiments and airborne electromagnetic exploration system flight tests of AEM were carried out and the results show thatthe cylinder-type pneumatic vibration isolation system performed admirably,which has good vibration isolation performance and can quickly attenuate and efficiently isolate large vibrations.As a result,it satisfies the requirement for vibration isolation systems in airborne electromagnetic exploration systems.
作者
苑俊峰
闫四腾
岳建华
YUAN JunFeng;YAN SiTeng;YUE JianHua(School of Mechatronic Engineering,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;School of Resources and Geosciences,China University of Mining and Technology,Jiangsu Xuzhou 221116,China)
出处
《地球物理学报》
北大核心
2025年第1期299-311,共13页
Chinese Journal of Geophysics
基金
国家自然科学基金重点项目(42230811)
国家自然科学基金优秀青年科学基金(海外)资助。
关键词
航空电磁探测系统
二次场微弱信号
振动隔离
动力学
气动悬挂
Airborne electromagnetic
Secondary field weak signal
Vibration isolation
Dynamics
Pneumatic suspension
作者简介
第一作者:苑俊峰,男,1988年生,教授,博士,主要从事移动电磁探测技术与装备方面的研究.E-mail:yuanjf@cumt.edu.cn;通讯作者:岳建华,男,1964年生,教授,博士,俄罗斯工程院外籍院士,主要从事电磁法勘探方面的研究.E-mail:yuejh@cumt.edu.cn。
