Matching Design of Assist Characteristic for Electric Hydraulic Power Steering System of Electric Bus

Abstract:

Electric hydraulic power steering system (EHPS) has the characteristics of high energy efficiency and reliability. In this paper, we focus on the design and analysis of assist characteristic for EHPS of electric bus. The relationship of steering assist power, steering wheel torque and steering resisting torque was analyzed; steering system model and vehicle dynamic model were built. By EHPS simulation, the relationship of pump flow rate, steering wheel angular velocity and vehicle speed was deduced and 3-D assist characteristic curve map was plotted, which was suitable for electric bus. In order to apply the assist characteristic curve into practice, we optimized the curve through BP neural network, and then obtained the assist power value under any vehicle speed and steering wheel angular velocity. Finally, EHPS simulation verified the optimized assist characteristic curve having a good performance.

• Periodical: Applied Mechanics and Materials (Volumes 427-429)
• Pages: 235-240
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.427-429.235
• Online since: September 2013
• Authors: Guo Biao Shi*, Jin Long Cui, Peng Gu
• Keywords: Assist Characteristic, Electric Hydraulic Power Steering, Matching Design

References

[1] Yong Huang, Quanshi Chen, Bin Chou, ect: Journal of Highway and Transportation Research and Developmen, 2005, Vol. 22（10）: 147－150 (In Chinese).

[2] Peiji Shi, in: Study on Matching Optimization and Control Strategy of Electric Hydraulic Power Steering System. Beijing. Beijing Institute of Technology, 2009 (In Chinese).

[3] Pei Zhu, Zhenyu Zhang: Journal of Chongqing Jiaotong University (Natural Science), 2011, Vol. 30（4）: 852-855 (In Chinese).

[4] Changfu Zong, Li Mai, Deping Wang, etc: Chinese Mechanical Engineering, 2007, Vol. 18（8）: 1001-1005 (In Chinese).

[5] Masato Abe (Xinbo Chen Translated): Vehicle Motion and Manipulation. Beijing. Mechanical Industry Press, 1998 (In Chinese).

[6] Fan Yu: Vehicle Dynamics and Control. Beijing. China Communications Press, 2004 (In Chinese).