| 印刷电路板振动模态的精确测试方法 |
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| 引用本文： | 陈皓瑛,臧朝平,王晓伟,宋华.印刷电路板振动模态的精确测试方法[J].沈阳航空工业学院学报,2014(1):60-66. |
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| 作者姓名： | 陈皓瑛 臧朝平 王晓伟 宋华 |
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| 作者单位： | [1]江苏省航空动力系统重点实验室 [2]南京航空航天大学能源与动力学院,南京210016 [3]中航工业动力控制系统研究所电子部,江苏无锡214063 |
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| 基金项目： | 国家自然科学基金（项目编号：51175224）,中央高校基本科研业务费专项资金（项目编号：NS2012141） |
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| 摘 要： | 印刷电路板的动力学特性直接影响机载电子设备在振动和冲击环境下的工作可靠性,有必要在设计阶段对其进行动力学分析.印刷电路板为薄壁结构,质量一般较小,在使用传统的加速度传感器测量时,传感器的附加质量会对模态测试结果造成影响.通过加速度传感器与激光测振仪测试数据的对比,分析了加速度传感器附加质量对模态测试结果的影响,验证了传感器附加质量消除方法的效果,结论认为传感器附加质量对印刷电路板模态测试的结果影响明显且这种影响不能被完全消除;使用扫描式激光测振仪可以得到精确详细的模态参数.
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| 关 键 词： | 印刷电路板 加速度传感器 激光测振仪 模态测试 |
An accurate testing method for vibration mode of printed circuit board |
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| CHEN Hao-ying,ZANG Chao-ping,WANG Xiao-wei,SONG Hua.An accurate testing method for vibration mode of printed circuit board[J].Journal of Shenyang Institute of Aeronautical Engineering,2014(1):60-66. |
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| Authors: | CHEN Hao-ying ZANG Chao-ping WANG Xiao-wei SONG Hua |
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| Institution: | 1. Jiangsu Province Key Laboratory of Aerospace Power Systems ; 2. College of Energy ＆ Power Engineering, Nanjing University of Aeronautics ＆ Astronautics, Nanjing 210016 ; 3. Center of Electron, AVIC Aviation Motor Control System Institute, Jiangsu Wuxi 214063 ) |
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| Abstract: | Dynamic performance of PCB directly affects the reliability of airborne electronic equipment under vibration and shock, so it is necessary to make a dynamic analysis in its design stage. PCB is a thin plate structure with small mass, thus the mass loading qualities will affect modal test results when using accelerom- eter. This paper compares the test data acquired by accelerometer and LDV, analyzes the mass loading effects of the accelerometer, verifies the effects of the method for eliminating transducer mass loading qualities, and finally draws two conclusions ： 1 ） The transducer mass loading effects significantly influence the modal test data and it can not be completely eliminated. 2） Accurate and detailed modal parameters can be achieved by using SLDV. |
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| Keywords: | printed circuit board accelerometer laser doppler vibrometer modal testing |
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