The Centre for Nano Science and Engineering (CeNSE), a leading nano science and nanotechnology research centre located at Indian institute of science (IISc), Bengaluru, hired NV Dynamics to conduct vibration assessment at their facility. The facility includes advanced clean rooms and precision instruments for research in nanoelectronics, these instruments are highly sensitive for vibrations. The intent of the task was to conduct detailed vibration assessment, identify the source of vibration and to quantify their contributing frequencies. The assessments were carried out at the gas sensors lab, functional thin films lab, meeting room and rooftop blower units of the facility.
In the gas sensors lab, tri-axial and ultra-low frequency accelerometers were mounted on equipment racks and the floor, to capture vibrations under ambient state, simultaneous operation and sequential usage of the equipment. In the functional thin films lab, accelerometers were similarly deployed with measurements recorded under different equipment operating conditions and HVAC operating combinations to isolate contributing sources.
The meeting room setup involved ultra-low frequency accelerometers placed on a table and structural railing to detect transmitted vibrations. On the rooftop, tri-axial accelerometers were installed on blower motor bearings and bases to measure vibrations during normal operation.
The data acquisition was performed using a multi-channel system, followed by data processing, integration to velocity and spectral analysis. Results indicated a dominant 16 Hz vibration across locations, primarily originating from rooftop equipment, with transmission through the building structure.
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