Total views : 252

Design, Analysis and Testing of Multi-axis Vibration Fixture for Electronic Devices

Affiliations

  • MTRDC, DRDO, Bangalore, India
  • Manipal University Jaipur, Jaipur Campus, India

Abstract


Objectives: Any device required to operate under vibration environment has to be tested for the same. The mounting pattern of vibration shaker is fixed. Hence a fixture as adaptor is needed for mounting the Device Under Test (DUT). Method/Analysis: These fixtures are to be stiff (natural frequency > highest frequency of test spectrum) to avoid fixture resonance leading to amplification of loads. In the present study, two fixtures – 1) with single mount 3 orientation capability and 2) capable of for 3 axes simultaneous loading were designed, analysed (using ANSYS16) and developed with the aim of reducing time in a single test and effort during testing. Findings: The fixtures were tested by regular vibration shaker as well as a hand held analyser. The analysis and testing yielded good correlation for the natural frequency estimate (< 15% deviation).Using fixture-1, 4 units with 3 orientations can be tested simultaneously and each of the devices can be tested for the remaining orientations during the subsequent tests. With fixture-2 one can test the device for all 3 axes loading in a single test thus reducing the testing time when accounted across a number of devices. Applications: As most of the time and effort during vibration testing goes in change of orientation and arrangement of slip-table (assembly and dis-assembly of the fixture-DUT) the fixtures designed can go a long way in minimising the time and manual labour when accounted across many units.

Keywords

Frequency Response Function (FRF), GRMS, Modal Testing, Random Vibration, Vibration Fixture.

Full Text:

 |  (PDF views: 3283)

References


  • Rao SS. Mechanical Vibrations. 5th edition, Prentice Hall, 2010.
  • Dave Steinberg. Vibration Analysis of Electronic Equipment, 3rd Edition, John Wiley and Son, 2000.
  • Ong JH, Lim GH. Simple Technique for maximizing the Fundamental Frequency of Vibrating Systems. The American Society of Mechanical Engineers Journal of Electronics Packaging. 2000 Feb; 122(4):341-349.
  • Kara Buckley, Lee Chiang. Design Principles for Vibration Test Fixtures, MIT Lincoln Laboratory, 2011, p. 1-32.
  • Fuqiang Sun, Xiaoyang LI, Tongmin Jiang, Wei Zhang. A Multi Axis Vibration Fixture Based on Electromagnetic Shaker. IEEE Proceedings of 8th International Conference on Reliability, Maintainability and Safety (ICRMS). 2009 Jul, p. 1183-1186.

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.