A new MTTE methodology for electric vehicle traction control

Abstract

A new traction control which utilizes the maximum transmissible torque estimation (MTTE) scheme to execute the anti-slip control of electric vehicles is proposed in this study. Since the function of embedded knowledge mechanism, the chassis velocity and information about tire-road conditions is unnecessary. A closed-loop observer with disturbance estimation performance is employed to enhance the steering stability of MTTE approach. The proposed scheme which contains the closedloop friction torque estimator is not required to fulfill any differentiator. Moreover, the inversion of the controlled plant is also unnecessary. Evaluation examples are given to illustrate the performance and feasibility of the presented anti-slip strategy.

Cooperative control of yaw and roll motion for in-wheel motor vehicle with semi-active suspension

“…In addition, the maximum transmissible torque estimation (MTTE) method that needs neither chassis-velocity nor road-friction-coefficient information, is presented. [8][9][10] The yaw stability control is an important topic of the motion control for in-wheel motor vehicles. The 2-DOF (two-degree-of-freedom) dynamics model with linear tire force is used to design yaw stability controller, and also problems of the control expenditure and energyefficient yaw-moment allocation are discussed.…”

Fault-tolerant traction control of electric vehicles

“…Additionally, the digital delay of the motor driver has significant effects affections on the closed-loop observers and the proposed scheme. According to the practical tests of study of Hu, Yin et al (2009), with proper driving torque delay of L as 20 ms, the proposed approach can achieve a feasible performance. Hence, in the following, all experiments of the proposed approach utilize this delay parameter.…”

“…The MTTE scheme has proved its robustness to the varying of vehicle mass M in study of Hu, Yin, Hori, and Hu (2009). Readers can refer to the discussion for further comprehension.…”

Dynamic motion stabilization for front-wheel drive in-wheel motor electric vehicles

“…As can be seen in Figure 13(a), the velocity difference between wheel and vehicle is constrained into an acceptable range under the traction control activated. The maximum transmissible torque can be obtained by taking the parameters of Table 2 and the estimated friction force into equations (8) and (10). After having the maximum transmissible torque of equation (10), the traction control strategy of equation (11) then can be carried out.…”

“…No matter what kind of the drive styles, due to the lack of mechanism supporting, the power decentralized systems require more advanced technologies to ensure the dynamic stability of the steering. For example, the adaptive front-lighting system (AFS) 2 is employed for the safe night driving, the electronic differential system (EDS) 3,4 is utilized for a smooth turning with less tire scrubbing, and the slip prevention technologies such as the antilock braking system (ABS) 5,6 and traction control system (TCS) [7][8][9] are equipped for the tire-grip. Obviously, new presented sedans must be safe and reliable.…”