1962-01-01

Shake-Complete Car Analysis with Excitation Through Road Wheels 620218

A laboratory system to evaluate shake characteristics in as many as six cars a day has been developed at the GM laboratories. The total vehicle is subjected to front and rear excitation frequencies ranging from 400–1200 cpm, and even as high as 2400 cpm. The data for each mode of vibration during a frequency scan of approximately three minutes are stored in a multichannel tape recorder which also provides automatic playback and plotting of results. This laboratory method has demonstrated good correlation with subjective road evaluations.

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