Quantitative Evaluation of Steering System Rattle Noise

Paper #:
  • 2017-28-1952

Published:
  • 2017-07-10
DOI:
  • 10.4271/2017-28-1952
Citation:
Sharma, U., Wilson, S., Lalasure, S., and Rajakumar, K., "Quantitative Evaluation of Steering System Rattle Noise," SAE Technical Paper 2017-28-1952, 2017.
Pages:
7
Abstract:
Today’s automotive industry in the process of better fuel efficiency and aiming less carbon foot print is trying to incorporate energy saving and hybrid technologies in their products. One of the trends which has been followed by Original Equipment Manufacturers (OEMs) is the usage of Electric Power Steering (EPS) system. This has been an effective option to target fuel saving as compared to hydraulically assisted power steering system. EPS has been already tested successfully, not only on system level but also on vehicle level for endurance and performance by OEMs as per their norms and standards. Over the decade, NVH (noise, vibration & harshness) have become one of the touch points for customer perception about vehicle quality. This leads us to a commonly perceived problem in EPS or manual type steering system i.e. rattle noise. In this paper, a methodology has been highlighted for detection, identification and measurement of steering rattle noise and hence identifying the noise source in the steering system by fundamentally correlating measured data of noise and vibration.
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