Abstract
Vehicle stability is a critical problem, especially for compact electric vehicle (EV) trucks, owing to the impact of the cargo weight and cornering characteristics. In this study, this problem was approached by mathematically formulating the change in the understeer characteristics of an EV truck as variable mass understeer gradient (VMUG) according to the vehicle cargo weight to design the reference yaw rate without the need to consider cornering stiffness. Comparison was made with the conventional methods by applying the VMUG-based slip control while simulating the yaw rate and side-slip tracking performance of the compact EV model for normal loading and overloading conditions. The simulation results demonstrate the superior performance of the proposed method compared to the existing methods. The proposed method has the potential for application for stability enhancement in non-electric and general-purpose vehicles as well.
Highlights
Smart Mobility Material & Component R&D Group, Korea Institute of Industrial Technology, Featured Application: MATLAB Simulink, CarSim
With the advent of electric vehicles (EVs), stability controls such as an anti-lock brake system, a yaw stability system, a traction control system, and a roll stability system have been applied as extensions of existing studies [1,2]
It was confirmed that the performance of the proposed yaw rate strategy was superior for both normal loading and overloading
Summary
Application of control techniques for improved vehicle stability has captured the interest of researchers for a long time. With the advent of electric vehicles (EVs), stability controls such as an anti-lock brake system, a yaw stability system, a traction control system, and a roll stability system have been applied as extensions of existing studies [1,2]. Necessary for DY calculation, it is not realistic to consider the change in cornering stiffness in actual vehicle control because of several challenges such as the absence of a sensor. Used a range of reference yaw rate instead of applying constant for active front steering control [11]. In most of the studies, a small range to calculate the desired yaw rate. Assuming a constant cornering stiffness assumed to be or varied within a small range to calculate the desired yaw rate. A new reference forrate the was yawdesigned rate was based designed based on the understeer steer gradient and the performance was verified throughthrough the slipthe controller.
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