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Show VIBRATION FIELD MEASUREMENT AND VISUALIZATION SYSTEM David Cuff, (Valeria LaSaponara) Department of Mechanical Engineering, University of Utah Devices designed to have some dynamic behavior have some intrinsic vibration resulting from these desired dynamics. This in-trinsic vibration is embedded in the system and can be the limit-ing factor in the performance of the device. This intrinsic vibration becomes increasingly important to fully analyze and characterize as dynamic device sizes reach the micro-level. Standard vibra-tion analysis methods using accelerometers become unfeasible as the device size reaches the accelerometer size; as a result, other vibration detection methods must be used. The goal of this research is to develop a vibration analysis test bed for applica-tions where accelerometer methods are not suitable. A 3D laser vibrometer is available for single point vibration in-spection. The vibrometer is capable of detecting vibration fre-quencies from 0.5 Hz to 250 kHz and accelerations as high as 8,000 g, making it suitable for vibration detection from acoustic to ultrasonic. However, for characterization of vibration in a device, a vibration or velocity field must be obtained. A device velocity field will be obtained by placing the device on a positioning table under the laser, and while in the device is in operation, collect data into a computer where the vibration field amplitude can be visualized. Other devices may lend themselves more to using a shaking ta-ble for excitation, and in these cases vibrational modes may be detected and the driving frequency of these modes can then be avoided during the operation of the device. David Cuff Mechanical Engineering Faculty Sponsor Valeria LaSaponara |
