Abstract
This paper presents a slip suppression controller using sliding mode control method for electric vehicles which aims to improve the control performance and the energy conservation by controlling the slip ratio of wheel. In this method, a robust sliding mode controller against the model uncertainties is designed to obtain the maximum driving force by suppressing the slip ratio. The numerical simulations for one wheel model under variations in mass of vehicle and road condition are performed and demonstrated to show the effectiveness of the proposed method.
Highlights
In recent years, as a powerful solution against the environment and energy problems, Electric Vehicles (EVs) have attracted great interests in the world [1]
It is different from the simulation condition described in previous that the simulations are executed under unchanging road condition and mass every time
The x-axis label indicates the cases of different road condition and mass, for example, DA1000 says that the car with the mass 1000 is driving on the dry asphalt, WA1200 shows that the case with the mass 1200 on the wet asphalt and IR1400 is the case with mass 1400 on the ice road
Summary
As a powerful solution against the environment and energy problems, Electric Vehicles (EVs) have attracted great interests in the world [1]. As a result, advanced motion control such as the traction control with wheel slip suppression can be realized more for EVs than ICEVs [3,4]. When the vehicle is starting off or accelerating under slippery road conditions, the driving wheels falling into slip causes unstable driving situation and a lot of energy waste. The driving force of wheel directly depends on the friction coefficient between road and tire, which is in accordance with the wheel slip and road conditions. For this reason, it becomes possible to influence driving force by controlling the wheel slip
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