A Study on the Modeling and Analysis of an Electro-Hydraulic Power Steering System

Electro-hydraulic power steering (EHPS) system for the fuel rate reduction and steering feel improvement is comprised of ECU including the logic which controls the steering system and BL DC motor and produces the best suited cornering force, BLDC motor, high pressure pump integrated module and basic oil-hydraulic circuit of the commercial HPS system. Electro-hydraulic system can be studied in two ways such as experimental and computer simulation. To get accurate results in experimental study of EHPS system, the real boundary management is necessary which is difficult task. And the accuracy of the experimental results depends on the preparation of the experimental setup and accuracy of the data collection. The computer simulation gives accurate and reliable results if the simulation is carried out considering proper boundary conditions. So, in this paper, each component of EHPS was modeled, and the model-based analysis and control logic was designed by using AMESim

Authors:

• Ji-Hye Kim
• Sung-Gaun Kim

Keywords:

• Power steering system
• Electro-Hydraulic power steering (EHPS) system
• Modeling of EHPS system
• Analysis modeling.

References:

[1] Ying Sun,Wei Chen, Yunqing Zhang and Liping Chen, "Multi-domain
Modeling and Simulation of Hydraulic Power Steering System Based on
Modelica", SAE(Society of Automotive Engineers) International, April
2010
[2] Peter E. Pfeffer, D. Nigel Johnston, Matija Sokola and Manfred Harrer,
"Energy Consumption of Electro-Hydraulic Steering Systems",
SAE(Society of Automotive Engineers) Technical Paper Series,
2005-01-2389, 2005
[3] Zhi Ming Li, J. M. Lee, S. H. Park, J. S. Kim, "Study on a New Power
Steering Based on Electro Hydrostaic Actuators", The Korean Society of
Automotive Engineers, pp. 110-115
[4] Kuo Jao Huang, Chih Chieh Chen, "Kinematic Displacement
Optimization of External Helical Gear Pumps", Chung Hua Journal of
Science and Engineering, Vol. 6, No. 2, pp. 23-28
[5] Manring, N. D. and Kasaragadda, S. B. "The Theoretical Flow Ripple of
an External Gear Pump.", ASME Journal of Dynamic Systems,
Measurement, and Control, pp. 396-404, ASME, 2003
[6] B.C.Jang, S.C.Lee, "A Mathematical Model of a Power Steering System",
The Korean Society of Automotive Engineers, Vol 5, No 4, pp.39-47,
1997
[7] Wolfgang Kemmetm¨uller, Andreas Kugi,Steffen M¨uller, "Mathematical
Modeling and Nonlinear C- ontroller Design for a Novel Electrohydraulic
Powe- r-Steering System", IEEE,VOL 12, NO 1, pp. 5077-5082, 2007
[8] LMS Imagine.
Lab:http://www.lmsintl.com/imagine-amesim-1-d-multi-domain-systemsimulation