Guohua Xiang

Work place: Institute of Industry & Equipment Technology, Hefei University of Technology



Research Interests: Computational Science and Engineering, Computational Engineering, Engineering


Guohua Xiang received the B.E. degree from the School of Electrical Engineering in Zhengzhou University in 2010. Since 2014, he is working with Benxian Xiao as his student for the Master’s degree in control theory and control engineering in Hefei University of Technology, Hefei, China.

His current research interests include steering-by-wire system, the fuzzy self-adaptive PID control, and the variable transmission ratio control.

Author Articles
Research on Variable Transmission Ratio and Yaw Rate Control Strategy of Electric Forklift Steering-by-Wire System

By Guohua Xiang Benxian Xiao

DOI:, Pub. Date: 8 Oct. 2016

Combined with the transmission ratio charac-teristics of forklift steering-by-wire (SBW) system, through the application of fuzzy control technology, the variable transmission ratio function is designed based on the steering handle angle and vehicle speed, and simula-tion analysis of sinusoidal steering is done at low-speed and high-speed. Simulation results show that the fuzzy variable transmission ratio control can make forklift steering light & sensitive at low-speed and steering steady & heavy at high speed, also it can improve the operation stability and reduce the driver’s load. Discuss the relationship between yaw rate and forklift handling stability, propose the yaw rate feedback control strategy based on the fuzzy variable transmission ratio control, and design a fuzzy self-adaptive PID controller. Simula-tion results show that the SBW system based on the fuzzy variable transmission ratio control with yaw rate feedback can accurately and quickly track the desired yaw rate, and reduce or even eliminate the overshoot phenomenon, improve the forklift dynamic performance.

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