摘要
采用四个三向加速度计在空间内组成阵列的方法,设计了六自由度振动测量装置。通过刚体运动学理论,推导了六自由度振动测量装置的信号转换矩阵,得到了被测位置沿三个主轴方向的线加速度以及绕三个主轴的角加速度。构建了六自由度振动测量装置的有限元模型,对装置的六自由度振动传递特性进行了数值仿真分析,并验证了信号转换矩阵的正确性。搭建了六自由度振动测量装置的模态试验系统,测试了装置的模态及振型。研究结果表明:六自由度振动测量装置在不高于160 Hz的频率范围内,线加速度测量误差小于1%,角加速度测量误差为10%左右。
A device for measuring six degree of freedom （6-DOF） vibration is presented by an array composed of four triaxial accelerometers in space. Linear acceleration of the measured position along three principal axes and the angular acceleration around the three axes can be obtained by the signal transfer matrix derived by using of rigid body kinematics. Finite element model is formulated to carry out vibration transfer characteristics analysis of the 6-DOF vibration measuring device, and further to validate of the correctness of the transfer matrix of the test device. Modal testing system of the testing device is established, and modal test is carried out. Both the numerical and experimental results reveal that test error for linear acceleration of the device is lower than 1%, and the test error is nearly 10% for angular acceleration of the device.
作者
叶嘉
黄宋均
陈荣
YE Jia;HUANG Songjun;CHEN Rong(Navy Representative Office at Shanghai No.704 Research Institute, Shanghai 200031;Shanghai Marine Equipment Research Institute, Shanghai 200031, China)
出处
《机电设备》
2018年第2期12-15,19,共5页
Mechanical and Electrical Equipment
基金
国防科工局技术基础项目(JSHS2016207B002)
