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The Electric Motor Train Units (EMU) load is the main load of the power traction system for high-speed railway, so the accuracy of load characteristic description has an important influence on establishing traction load model. This article designed the logical control strategy for traction drive system and set up a complete digital simulation model of the traction drive system for CRH2 EMU, and then...
The driving assistance technology is an interesting method to increase the safety on the road. By helping the driver to avoid dangerous situations while letting him in charge of the behavior of the vehicle during normal conditions, this kind of system combines both the rapid reactions of an automated system and the human ability to react to unpredictable scenarios. The main demanding aspect of such...
Energetic Macroscopic Representation (EMR) has become more and more powerful tool to model and control the multi-physical systems. In literature, the well-known "magic formula" of Pacejka seems to be not adequately presented in EMR due to the conflict of energy balance. In this paper, the authors propose an EMR of tire-road interaction using Pacejka's model. The advantage of the proposed...
This paper presents a traction control strategy via LPV(Linear Parameter Variable) slip ratio control method for independent in-wheel motor electric vehicle. In order to simplify the controller design and implement distributed control system in each wheel, the slip ratio control model with LPV form and uncertain disturbance is derived. Furthermore, a two-degree-of-freedom LPV controller with disturbance...
In this paper experimental results of testing slip-based traction control system (TCS) with an on-line road condition estimation are presented. TCS is designed for a car with in-wheel electric motors, so that estimation and control are implemented independently for each wheel thus enabling the optimal friction coefficient for every wheel, even if they are on different surfaces or have different tire...
In this paper, we model an electronic differential that will offer the best stability of vehicle in the curved road. The use of electronic differential constitutes a technological advance of vehicle design along the concept of more electric vehicles. Electronic differential have the advantages of replacing loosely, heavy and inefficient mechanical transmission and mechanical differential with a more...
This paper proposes a novel traction control for a front-wheel drive in-wheel motor electric vehicle. The presented vehicle has advantages on high fuel efficiency and cost effectiveness. In order to achieve specific control performance, this study employed a high speed microcontroller as the vehicle's electronic control unit. The anti-skid function based on a reliable traction control kernel is embedded...
This paper describes the drive performance of a FRID EV (front and rear wheel independent drive type electric vehicle) that is safe and has good running performance, and is specifically focused on a driving method that can deliver efficient running performance on various road surfaces. The driving performance is obtained via a traction control method that uses the structural features of the FRID EV...
A traction control system (TCS) using fuzzy sliding mode control (FSMC) is proposed for the electric scooter with direct driven wheel motor in this paper. First, road friction coefficient is estimated using normal force observer and traction force observer. A road condition observer is then employed to estimate the gradient of road friction coefficient with respect to the tire slip ratio. An innovative...
Slipping drive wheels can provide little lateral force, thus when drive wheels are slipping, the front wheel drive vehicles will lose turning ability, while the rear wheel drive vehicles will spin. Compared to the conventional vehicles, HEVs are more easily to slip when driving on the slippery road, since the electric motor can provide large drive torque under low speeds. In this paper, a traction...
Slipping drive wheels can provide little lateral force, thus when drive wheels are slipping, the front wheel drive vehicles will lose turning ability, while the rear wheel drive vehicles will spin. Compared to the conventional vehicles, HEVs are more easily to slip when driving on slippery road, since the electric motor can provide large drive torque under low speeds. In this paper, the dynamic modeling...
A wheel slip controller of an electric vehicle with two independent rear wheel drives is presented. The vehicle dynamic model and the proposed torque controller for the DC motors are also presented. The speed and torque observer solution proportionate the necessary external torque estimation to the anti-slip wheel controller. The wheel slip is based on the comparison of the real vehicle velocity and...
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