Gareth A. Cooper
Gareth A. Cooper is a graduate of Loughborough University's automotive engineering department. He has been involved in many automotive NVH projects providing testing, CAE analysis, and solution implementations. Cooper heads up SMT's engineering team to deliver SMT's NVH software and hardware solutions as product and engineering services. (Bio last updated 2016-05-01 Contact Randy Stott, Managing Editor, with changes.)
Articles by Gareth A. Cooper
- Noise Reduction in an EV Hub Drive Using a Full Test and Simulation Methodology (May 2016)
With the ongoing push towards electric vehicles (EVs), there is likely to be increasing focus on the noise impact of the gearing required for the transmission of power from the (high-speed) electric motor to the road. Understanding automotive noise, vibration and harshness (NVH) and methodologies for total in-vehicle noise presupposes relatively large, internal combustion (IC) contributions, compared to gear noise. Further, it may be advantageous to run the electric motors at significantly higher rotational speed than conventional automotive IC engines, sending geartrains into yet higher speed ranges. Thus the move to EV or hybrid electric vehicles (HEVs) places greater or different demands on geartrain noise. This work combines both a traditional NVH approach (in-vehicle and rig noise, waterfall plots, Campbell diagrams and Fourier analysis) - with highly detailed transmission error measurement and simulation of the complete drivetrain - to fully understand noise sources within an EV hub drive. A detailed methodology is presented, combining both a full series of tests and advanced simulation to troubleshoot and optimize an EV hub drive for noise reduction.