A New Steering-by-Wire System Driving by Electric Wheels

Abstract:

For electric power steering is weak and can not be used in heavy vehicles. In order to solve this problem, according to the characteristic that the driving torque of left and right steering wheel can be independently controlled in electric wheel driving vehicle, a new non-trapezium-steering system has been proposed based on electric wheel driving and powering in this paper. This system makes use of the steering torque around the kingpin from electric wheel driving, and is controlled by steering constraint mechanism. Steering system force analysis was conducted to analyze the feasibility of the system in theory. On this basis, a small prototype vehicle was designed. With the use of Bluetooth wireless serial chip and STC12c5a60s2 microcontrollers, the steering-by-wire system lower computer was developed. With the LabView software, the upper computer system was developed in notebook computer. With these two systems, the steering system can conduct data acquisition and control. To verify the performance of the system, the steering angle step input test while vehicle is stationary, the steering angle step input test at low running speed were carried out respectively on the prototype vehicle. Results of steering wheel turning angle and wheel rotation rate show that non-trapezium steering-by-wire electric wheel driving power system can complete steering operation in a variety of conditions, and after removing steering trapezium, each wheel can be separately controlled for steering, and easy to implement multi-mode steering.

• Periodical: Applied Mechanics and Materials (Volume 729)
• Pages: 175-180
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.729.175
• Online since: January 2015
• Authors: Ping Xia Zhang*, Li Gao, Yong Qiang Zhu
• Keywords: Electric Wheels Driving Power, Non-Trapezium-Steering Mechanism, Steer-by-Wire System

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