MRI: Acquisition of a Scanning Laser Vibrometer for Smart-Structures Research

克拉克森大学，机械与航空工程系，goodarz Ahmadi，机械与航空工程系，pier Marzocca，机械与航空工程系，edward Sazonov，电气与计算机工程系，jubum Kim，土木与环境工程系本课题的目标是研制一种高性能扫描激光测振仪（SLV）。SLV将1)为智能结构（和其他结构）研究提供新的和独特的实验能力，2)加强学术部门之间的合作研究，3)为研究生/本科生的培训提供最先进的仪器，4)帮助招募代表性不足的群体的学生。SLV的原理是探测从测试对象的小区域散射的相干激光的多普勒频移。整个表面快速扫描和自动探测灵活的和交互式创建的扫描网格。SLV在不增加测试结构质量或刚度的情况下，对大量网格点进行非侵入式振动测量。如果没有扫描激光测振仪，就不可能方便地观察振动的模态振型和空间特征。SLV是一种单一的自动化交钥匙系统，具有激光测振仪的所有优点，并集成了双轴激光扫描仪的速度、易用性、准确性和全面的数据处理和可视化。更广泛的影响SLV将增加先进的实验能力，使克拉克森大学的智能结构实验室现代化，该实验室服务于许多创新的多学科研究和教育项目。所提出的研究将对航空航天、机械和民用系统的设计产生非常重要的影响。计划中的研究将推进高度柔性结构的动力学和控制知识，如游丝航天器、充气无人飞行器和用于数据存储设备的薄旋转磁盘。还将调查民用基础设施（桥梁和建筑物）和飞机结构的健康监测情况。SLV的测量特征对计划创新研究活动的成功至关重要。在技术会议上的演讲、期刊论文和网页将被用来广泛传播研究成果。SLV将加强以体验项目为基础的学习项目，以吸引女性和少数民族学生。研究生和本科生都将获得最先进的激光振动测量技术的经验。SLV将通过实验室演示和网站展示积极影响K-12社区的学生和教师。

ABSTRACTACQUISITION OF A SCANNING LASER VIBROMETER FORSMART-STRUCTURES RESEARCHRatneshwar Jha, Department of Mechanical and Aeronautical EngineeringGoodarz Ahmadi, Department of Mechanical and Aeronautical EngineeringPier Marzocca, Department of Mechanical and Aeronautical EngineeringEdward Sazonov, Department of Electrical and Computer EngineeringJubum Kim, Department of Civil and Environmental EngineeringClarkson University, Potsdam, NYPROJECT SUMMARYIntellectual MeritThe objective of this proposal is to acquire a high performance scanning laser vibrometer(SLV). The SLV will 1) provide new and unique experimental capabilities for smart-structures (and other structural) research, 2) enhance collaborative research across academic departments, 3) provide state-of-the-art instrumentation for training of graduate/undergraduate students, and 4) help recruitment of students from underrepresented groups. The SLV is based on the principle of the detection of the Doppler shift of coherent laser light that is scattered from a small area of the test object. Entire surfaces are rapidly scanned and automatically probed with flexible andinteractively created scan grids. The SLV performs nonintrusive measurement of vibrations at a large number of grid points without adding mass or stiffness to the test structure. The observation of the mode shapes and spatial features of the vibration is not conveniently possible without a scanning laser vibrometer. The proposed SLV is a single, automated, turnkey system that offers all the advantages of a laser vibrometer integrated with the speed, ease of use, accuracy and comprehensive data processing and visualization of a dual-axis laser scanner.Broader ImpactsThe SLV will add advanced experimental capabilities to modernize the Smart StructuresLaboratory at Clarkson University, which serves many innovative, multidisciplinary research and education projects. The proposed research will have very significant impact on the design of aerospace, mechanical, and civil systems. The planned research will advance the knowledge of dynamics & control of highly flexible structures such as Gossamer Spacecraft, inflatable unmanned aerial vehicles, and thin spinning disks for data storage devices. Health monitoring of civil infrastructures (bridges and buildings) and aircraft structures will also be investigated. The measurement features of a SLV are critical to the success of the planned innovative research activities. Presentations at technical conferences, journal papers, and web pages will be used to disseminate the research results widely. The SLV will enhance experiential project-based learning programs to attract women and minority students. Both graduate and undergraduate students will gain experience with state-of-the-art laser based vibrations measurement techniques. The SLV will positively impact outreach to the K-12 community of students and teachers through laboratory demonstrations and web site displays.