力平衡式加速度传感器的性能评价方法  

Performance Evaluation Method for Force Balance Accelerometer

作　　者：杨黎薇[1] 周正华[2] 崔建文[1] 刘琼仙[1] 

机构地区：[1]云南省地震局,云南昆明650224 [2]南京工业大学,江苏南京210009

出　　处：《地震研究》2014年第2期304-311,324,共8页Journal of Seismological Research

基　　金：地震行业科研专项"地震紧急处置关键技术及在快速轨道交通工程中应用"(201108003)资助

摘　　要：以SLJ-100型力平衡式加速度传感器为例,介绍了力平衡式加速度传感器的工作原理及系统动力方程.基于系统动力方程,计算了功能试验响应及频率响应,以功能试验为基础,建立一套确定传感器固有频率及阻尼比值的方法.分析试验结果表明,阻尼比值对传感器的幅频特性及相频特性具显著影响,其最佳选择范围为0.68 ～0.70.最后以传感器的自振特性及性能评价为基础,提出了基于功能试验的力平衡式加速度传感器的性能评价方法.Taking the SLJ-100 force balance accelerometer （FBA） as an example,the working principle and system dynamic equations of the FBA was described.Firstly,basing on the system dynamic equations,the functional tests response and frequency-response of the FBA was calculated.In addition,a method which could determine natural frequency and damping ratio of the sensor based on functional tests was developed.The analyzing test result indicated that the damping ratio had significant impact on amplitude-frequency and phase-frequency characteristic of the sensor,whose best value is ranging from 0.65 to 0.68.Finally,on the basis of vibration characteristics and performance evaluation of the sensor,a performance evaluation method of the FBA was put forward based on functional tests.

关 键 词：力平衡式加速度传感器 频率响应 功能试验 固有频率 阻尼比值 

分 类 号：P315.621[天文地球—地震学]