| 摘要: |
| 获取测试目标的动态响应参数是航天器产品冲击测试中的关键内容，传统接触式传感器方法存在安装困难、监测维度单一、难以适应复杂测试环境等缺点。提出了一种用于获取冲击测试动响应的高速视觉测量方法，利用双目视觉原理获取测试对象的三维运动轨迹，并在此基础上解析测试过程中的冲击响应参数。该方法在空气炮冲击测试试验中获取的冲击响应谱曲线与加速度计的测量结果一致，识别结果相对偏差优于10%，表明高速视觉测量方法在航天器冲击测试中具有良好的应用潜力。 |
| 关键词: 冲击测试 冲击响应谱 高速视觉测量 拐点频率 |
| DOI： |
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| 基金项目:慧眼项目；土木工程防灾国家重点实验室自主课题（SLDRCE19-B-37，SLDRCE19-A-12） |
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| High Speed Vision Measurement Method for Dynamic Response in Impact Testing |
| CHEN Peng,GAO Yi,LIN Hong,NAN Jinghong,ZHANG Qun |
| (1.College of Surveying Mapping and Geo-Informatics, Tongji University, Shanghai 200092, China;3. State Key Lab. of Disaster Reduction in Civil Engineering,Tongji University, Shanghai 200092, China;Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China) |
| Abstract: |
| Obtaining dynamic response parameters of test targets is a key content in impact testing of spacecraft products. Traditional contact sensor methods have shortcomings such as difficulty in installation, single monitoring dimension, and difficulty in adapting to complex test environments. This paper proposes a high-speed visual measurement method for obtaining the dynamic response of impact testing, which uses the binocular vision principle to obtain the three-dimensional motion trajectory of the test object, and analyzes the impact response parameters during the testing process. The shock response spectrum curve obtained by this method in the air gun impact testing experiment is consistent with the measurement results of the accelerometer, and the relative deviation of identification parameters such as inflection point of frequency is better than 10%, indicating that the high-speed visual measurement method has good application potential in spacecraft impact testing. |
| Key words: Impact testing Shock response spectrum High speed vision measurement Inflection point frequency |