Dynamic braking

About: Dynamic braking is a research topic. Over the lifetime, 3472 publications have been published within this topic receiving 34897 citations. The topic is also known as: Rheostatic brake.

Steering and independent braking control for tractor-semitrailer vehicles in automated highway systems

Abstract: A steering and independent braking control for a tractor-semitrailer vehicle is proposed to achieve lane following in automated highway systems. Independent braking force of the semitrailer is utilized to stabilize the trailer yaw motion and thus to prevent the potential occurrence of jack-knifing. The control algorithm is designed by the input/output linearization and the adaptive backstepping design methodologies.

Design and Control Principles of Hybrid Braking System for EV, HEV and FCV

Abstract: Due to the introduction of electrical regenerative braking, the structure, design and control of braking system of an electric vehicle (EV), hybrid electrical vehicle (HEV) and fuel cell vehicle (FCV) is quite different from the pure mechanical braking system of conventional vehicles. Desirable braking performance not only guarantee to quickly stop the vehicle and maintain the traveling direction stable and controllable, but recapture the braking energy as much as possible on various conditions of road. In this paper, the braking energy characteristics on vehicle speed and braking power in typical urban driving cycles have been investigated. The results provide strong supports to the design and control of such hybrid braking system. Two hybrid braking systems have been introduced. One is parallel hybrid braking system, which has a simple structure and control. The other is fully controllable hybrid braking system. Two typical control strategies for this system have been established. One emphasizes optimal braking performance and the other on optimal braking energy recovery.

Automatic braking apparatus generating braking force in accordance with driving condition of driver

Abstract: A brake control ECU of an automatic braking apparatus calculates an awareness level in accordance with: whether or not there are a braking pedal or accelerator pedal operations; whether or not there are shift and steering wheel operations; and whether a level of a driver's eye movement lowers. When the brake control ECU determines that the awareness level has decreased, it controls the hydraulic braking apparatus so as to increase a provision braking force applied for a certain period and with a certain cycle to each wheel 4 FR, 4 FL, 4 RR, 4 RL. Accordingly, vibration caused by increase and decrease of the braking force is generated in a body of a vehicle that is running. This vibration arouses the driver whose level of consciousness has decreased.

Transient switching control strategy from regenerative braking to anti-lock braking with a semi-brake-by-wire system

Abstract: Regenerative braking is an important technology in improving fuel economy of an electric vehicle (EV). However, additional motor braking will change the dynamic characteristics of the vehicle, leading to braking instability, especially when the anti-lock braking system (ABS) is triggered. In this paper, a novel semi-brake-by-wire system, without the use of a pedal simulator and fail-safe device, is proposed. In order to compensate for the hysteretic characteristics of the designed brake system while ensure braking reliability and fuel economy when the ABS is triggered, a novel switching compensation control strategy using sliding mode control is brought forward. The proposed strategy converts the complex coupling braking process into independent control of hydraulic braking and regenerative braking, through which a balance between braking performance, braking reliability, braking safety and fuel economy is achieved. Simulation results show that the proposed strategy is effective and adaptable in d...

Regenerative braking strategy for electric vehicles

Abstract: Regenerative braking is an effective approach for electric vehicles to extend their driving range. The control strategy of regenerative braking plays an important role in maintaining the vehicle's stability and recovering energy. In this paper, the main properties that have influence on brake energy regeneration are analyzed. Mathematical model of brake energy regenerating electric vehicles is established. By analyzing the charge and discharge characteristics of the battery and motor, a simple regenerative braking strategy is proposed. The strategy takes the braking torque required, the motor available braking torque, and the braking torque limit into account, and it can make the best use of the motor braking torque. Simulation results show higher energy regeneration compared to a parallel strategy when the proposed strategy is adopted.