This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Optimizing Steering Column Layout and UJ Phase Angle to Enhance Vehicle Dynamics Performance
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 05, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Event: Automotive Technical Papers
Vehicle dynamics is one of the most important vehicle attributes. It is classified into three domains, the longitudinal, vertical, and lateral dynamics. This paper focuses on optimizing the lateral vehicle dynamics which is driven by the straight ahead controllability and cornering controllability of the vehicle. One of the important parameters that dictates these sub-attributes is the steering ratio. Therefore, designing the right steering ratio is critical to meet the vehicle “specific” targets. Significant amount of work has been done by many researchers on variable steering ratio by implementing variable gear ratio (VGR) rack, active steering, and steer-by-wire systems. This paper discusses the methodology and considerations to optimize the steering ratio for a constant gear ratio rack by optimizing the steering column layout, viz., orientation and the phase angle in universal joints. A detailed analysis of steering system layout is done to optimize the steering ratio to enhance the vehicle dynamics performance. Full vehicle-level multibody dynamics (MBD) simulations are done in ADAMS® to compare the vehicle response behavior for different steering ratios in the open-loop objective tests. The Computer Aided Engineering (CAE) results show significant impact of the proposed design methodology on vehicle controllability. When the phase angle and the initial column angle are optimized for a quick on-center steering ratio, the response gains are higher, resulting in a sporty and agile feel. However, when the same vehicle is tuned for a slower on-center steering ratio, the gains are lower, resulting in a sluggish, lazy feel. This methodology can be implemented during the initial vehicle design phase to optimize vehicle performance.
|Journal Article||Dynamic Characterization of Intelligent Vehicle Systems Theory and Experiment|
|Technical Paper||A Study on the Advanced Technology Analysis Process of Steering System for Idle Performance|
CitationPuvvula, P., Ravuri, S., Dubal, A., and Salunkhe, S., "Optimizing Steering Column Layout and UJ Phase Angle to Enhance Vehicle Dynamics Performance," SAE Technical Paper 2019-01-5010, 2019, https://doi.org/10.4271/2019-01-5010.
Data Sets - Support Documents
|Unnamed Dataset 1|
- Yoshino , T. and Nozaki , H. Variable Gear Ratio Control Using Vehicle Body Slip Angle Engineering 6 439 448 2014 10.4236/eng.2014.68046
- Guo , Y. and Feng , Y. Modeling and Simulation of Active Front Steering System Based on ADAMS 500 507 2011 10.1007/978-3-642-25002-6_70
- Heathershaw , A. Optimizing Variable Ratio Steering for Improved On-Centre Sensitivity and Cornering Control SAE Technical Paper 2000-01-0821 2000 10.4271/2000-01-0821
- Koehn , P. and Eckrich , M. Active Steering - The BMW Approach Towards Modern Steering Technology SAE Technical Paper 2004-01-1105 2004 10.4271/2004-01-1105
- Mishra , D. Mechanically Variable Steering Ratio Gear Box International Journal of Mechanical Engineering and Robotics Research 3 4 136 139 2014
- Seherr-Thoss , H.-C. , Schmelz , F. , and Aucktor , E. Universal Joints and Driveshafts: Analysis, Design, Applications Springer Science & Business Media 2013
- Vesali , F. , Rezvani , M.A. , and Kashfi , M. Dynamics of Universal Joints, Its Failures and Some Propositions for Practically Improving Its Performance and Life Expectancy Journal of Mechanical Science and Technology 26 2439 2449 2012 10.1007/s12206-012-0622-1
- Wikipedia Contributors Universal Joint https://en.wikipedia.org/w/index.php?title=Universal_joint&oldid=868475075 2018
- Hegazy , S. , Rahnejat , H. , and Hussain , K. Multi-Body Dynamics in Full-Vehicle Handling Analysis Proceedings of the Institution of Mechanical Engineers. Part K: Journal of Multibody Dynamics 213 1 19 31 1999