Electric Power Assist Steering System Parameterization and Optimisation Employing Computer-Aided Engineering

Paper #:
  • 2015-01-1500

Published:
  • 2015-04-14
DOI:
  • 10.4271/2015-01-1500
Citation:
Ljungberg, M., Nybacka, M., Gil Gómez, G., and Katzourakis, D., "Electric Power Assist Steering System Parameterization and Optimisation Employing Computer-Aided Engineering," SAE Technical Paper 2015-01-1500, 2015, doi:10.4271/2015-01-1500.
Pages:
9
Abstract:
The automotive industry strives to develop high quality vehicles in a short period of time that satisfy the consumer needs and stand out in the competition. Full exploitation of simulation and Computer-Aided Engineering (CAE) tools can enable quick evaluation of different vehicle concepts and setups without the need of building physical prototypes. Addressing the aforementioned statements this paper presents a method for optimising the Electric Power-Assisted Steering (EPAS) ECU parameters employing solely CAE. The objective of the optimisation is to achieve a desired steering response. The developed process is tested on three specific steering metrics (friction feel, torque build-up and torque deadband) for two function parameters (basic steering torque and active return) of the EPAS. The optimisation method enabled all metrics to fall successfully within the target range.
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