摘要
为了满足地震转动和工程结构扭转振动测量的需要,研制了一种超低频有源伺服式转动加速度计,本文阐述了该转动加速度计的基本原理,给出了其频率特性及灵敏度的表达式以及其主要技术指标。转动加速度计采用了惯性式旋转弹簧系统,有效提高了转动加速度计抵抗水平振动干扰的能力;转动加速度计采用了动圈闭环伺服式双摆结构,拓展了转动加速度计低频特性,且不需要调零。采用调理和合成电路,可方便的调整灵敏度并进一步提高抗水平振动干扰的能力。自校准测试和角振动台校准结果验证了理论推导结果的正确性,可实现超低频转动分量的测量,该仪器已在海洋平台上获得应用。
The ultra-low frequency active servo type rotational accelerometer is developed to meet the demand of the measurement of seismic rotation and torsional vibration of the engineering strctures.The fundamental principle of the rotational accelerometer was illustrated in this paper.The paper presented not only the expressions of the frequency characteristics and sensitivity,but also the main technical specifications of the rotational accelerometer.The inertial rotary spring system was used in the rotational accelerometer to improve its capacity of resisting horizontal vibration disturbance.The closed loop servo type double swing structure of the moving coil of the rotational accelerometer expands its low frequency characteristics and needs no zero-adjustment.Its onditioning and composite cir- cuits can adjust the sensitivity of the system and improve its further capacity of resisting horizontal vibration disturbance.The self-calibration measurement and the angular vibration table calibration of the rotational accelerometer verify the correctness of the theoretical derivations.The rotational accelerometer can be used to measure the ultralow frequency rotational component.The instrument has been applied to the offshore platforms.
作者
高峰
杨学山
GAO Feng;YANG Xueshan(Key Laboratory of Earthquake and Engineering and Engineering Vibration,Institute Engineering Mechanics,China Earthquake Administration,Harbin 150080,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2018年第5期171-178,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家重点研发计划资助(2017YFC1500805)~~
关键词
地震转动
有源伺服
超低频
转动加速度计
earthquake rotation
active servo
ultra-low frequency
rotational accelerometer
