Order separation using multiple tachometers and the TVDFT order tracking method

Authors

Jason Blough, Michigan Technological UniversityFollow

Document Type

Conference Proceeding

Publication Date

5-16-2005

Department

Department of Mechanical Engineering-Engineering Mechanics

Abstract

An automobile and a tracked military vehicle were instrumented with multiple tachometers, one for each drive wheel/sprocket and operated with accelerometers mounted at suspension, chassis, and powertrain locations on the vehicles. The Time Variant Discrete Fourier Transform, TVDFT, order tracking method was then used to extract the order tracks and operating shapes estimated based on each tachometer. It is shown that under some conditions a different operating shape is excited by each of the wheels/sprockets simultaneously. This is due to the asymmetries present in the vehicles. The strengths of the TVDFT order tracking method are shown for this type of analysis, which is difficult due to the closeness, within 0.001 orders, and crossing of the orders. Benefits of using multiple tachometers and advanced order tracking methods become apparent for solving a class of noise and vibration problems.

Publisher's Statement

Copyright © 2005 SAE International. Publisher’s version of record: https://doi.org/10.4271/2005-01-2265

Publication Title

SAE Technical Papers

Recommended Citation

Blough, J. (2005). Order separation using multiple tachometers and the TVDFT order tracking method. SAE Technical Papers. http://doi.org/10.4271/2005-01-2265
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2865