Laser-based measurement system for measuring the vibration on rotating discs

I. Bucher; P. Schmiechen; David A. Robb; David J. Ewins

doi:10.1117/12.185355

8 September 1994 Laser-based measurement system for measuring the vibration on rotating discs

I. Bucher, P. Schmiechen, David A. Robb, David J. Ewins

Proceedings Volume 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1994) https://doi.org/10.1117/12.185355
Event: Vibration Measurements by Laser Techniques: First International Conference, 1994, Ancona, Italy

Abstract

This paper describes a laser-based system for measuring vibration on rotating discs. The setup allows the user to track an arbitrary periodic path at any multiple of the disc's rotational speed. In particular, the laser can be rotationally-locked to the disc and thus track a circle in space allowing continuous measurement of the response at a defined point on the disc for both constant and varying rotation speed. An electro-magnetic non-contacting shaker provides the forcing excitation to the rotating disc. Due to rotation, the vibration spectrum of the rotating disc becomes very complex. In particular, the disc vibrates at several frequencies other than the applied excitation frequency. A stepped sine method has been developed to measure and for parameter identification of the rotating disc vibration properties.

Citation Download Citation

I. Bucher, P. Schmiechen, David A. Robb, and David J. Ewins "Laser-based measurement system for measuring the vibration on rotating discs", Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); https://doi.org/10.1117/12.185355

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