Maintaining Accuracy, Reliability, and Performance of Vibration Test Systems Over Time

Vibration test systems, also called shakers, are used for laboratory testing, modal and structural analysis, squeak and rattle, package testing, and durability testing of objects of practically any size – ranging from small electrical components through to complete systems and large payloads. NVMS and HBK are leading suppliers of vibration test systems globally with an extremely comprehensive portfolio of solutions covering the complete measurement chain.

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Most vibration test systems are comprised of the following elements: the shaker per se, its amplifier, its controller, a vibration control software, and the accelerometers and cables. The technical fundamentals of these systems are well covered in a very instructive online video.

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HBK shakers are extremely reliable and operate for many years. Nevertheless, like any complex and accurate systems, they benefit from proper care and maintenance.

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What follows should be considered by most users of vibration test systems to maintain accuracy, reliability, and performance of vibration test systems over time.

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1. Regular calibration of accelerometers. Like any measuring devices, accelerometers require regular calibration to ensure long-term accuracy. Not doing so puts at risk the validity of the tests. NVMS operates NATA-certified calibration labs to calibrate most types and makes of accelerometer.
2. Regular calibration of the controller. The controller sends inputs to the amplifier which in turns excites the shaker. A calibration of the controller ensures that the correct inputs are sent and therefore that the generated vibration profile is indeed the one calculated by the vibration control software.
3. Update and maintenance of the vibration control software. Like most software, is continuously developed and improved. Having the software under maintenance provides access to corrective fixes and new functionalities which match the evolution of various global testing standards.
4. Inspection and servicing of the shaker. Most shakers are electrodynamic systems with mechanical and electrical parts moving at high frequencies. Regular inspections of the shakers reduce unexpected drifting and breakdowns, increases reliability, and lowers long-term operating costs.

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The above technical services are all provided by NVMS and HBK. They can be accessed on-demand or through multi-year service contracts, the later allowing to forecast future costs and reduce downtime.

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For any questions please contact: info@nvms.com.au

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Author: Christian Ebel (MEng, MBA, MIEAust) – Business Manager, Test & Measurement