磁悬浮振源测试技术  

Measurement of Vibration Source Based on Magnetic Levitation

作　　者：江东[1] 杨嘉祥[1] 张静[1] 

机构地区：[1]哈尔滨理工大学电气与电子工程学院,哈尔滨150080

出　　处：《振动．测试与诊断》2011年第4期415-419,531,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：黑龙江省教育厅科技研究资助项目(编号:11551089)

摘　　要：构建了磁悬浮球系统模型,通过实测磁悬浮球受力参数推导了磁悬浮球动力学方程,该方程与质量-弹簧系统的动力学方程都可实现振动测量。利用磁悬浮振动测试系统测得受振体的振动并利用最小二乘拟合法得到最大振动强度的方向,由此得到振源的方向。通过两组磁悬浮振动测试系统得到振源的位置,推导了平面振源的二维坐标表达式。试验表明,磁悬浮振源测试系统的二维振源测试结果与实际振源位置相吻合。最后,推导了立体空间振源的三维坐标表达式。A magnetic levitation ball system is constructed.The dynamic equation of the magnetic levitation ball is deduced while the forced parameters of magnetic levitation ball have been measured.The dynamic equation is the same as a mass-spring system,which can be used to measure vibration.The object vibration signals are measured by the magnetic levitation vibration measurement system and the direction of maximum vibration intensity is acquired by the least squares fitting method,thus,we can get the direction of vibration source.Only using two magnetic levitation vibration measurement systems can we acquire the location of vibration source.The two-dimensional coordinate expression of plane vibration source is derived.Experiments show that the measurement results are consistent with the actual location of vibration resource.Fina1ly,the three-dimensional coordinate expression of vibration source in the three dimensional space is derived.

关 键 词：磁悬浮 振动测量 动力学方程 振源测量 

分 类 号：TH825[机械工程—仪器科学与技术]