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8. An energy-saving strategy for steering-motors of steer-by-wire vehicles

Author

Zhang Guangde, Lin Zhao, Huiyong Zhao, Wang Baohua, and He Yuping

Subjects
Computer science, business.industry, Mechanical Engineering, Process (computing), Energy consumption, CarSim, Automotive engineering, Computer Science Applications, Fuel Technology, Software, Mechanics of Materials, Control theory, Modeling and Simulation, Automotive Engineering, Safety, Risk, Reliability and Quality, business, MATLAB, computer, Energy (signal processing), Efficient energy use, computer.programming_language
Abstract

In a steering process, the steering-motor of a steer-by-wire (SBW) vehicle consumes energy. To facilitate energy efficiency analyses, the steeringmotor energy consumption is split into two parts, which correspond to varied and constant steering-wheel angle operating condition, respectively. The former condition is a vehicle operational manoeuvre, in which steering-wheel angle varies continuously, whereas the latter is a constant-radius circular-curve negotiation, in which steering-wheel angle maintains constant. Analysing the relation of steering-wheel angle with a road curvature, we propose an energysaving strategy for steering-motors of SBW vehicles. The energy-saving strategy is featured with a concept, a hydro-mechanical locking device, and an SBW controller for the steering-motor unit. The feasibility and effectiveness of the energy-saving strategy is demonstrated using closed-loop simulations. To implement the closed-loop simulation, we combine the driver, vehicle, and curved road models generated in CarSim software with the steering-motor model and the SBW controller developed in Matlab/Simulink.

Published
2020

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