Topic
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.
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TL;DR: In this article, an autonomous braking system is designed using the prediction of the stopping distance, which is determined by considering several factors such as the desired deceleration and the speed of the hydraulic brake actuator.
Abstract: An autonomous braking system is designed using the prediction of the stopping distance. The stopping distance needs to be determined by considering several factors such as the desired deceleration and the speed of the hydraulic brake actuator. In particular, the actuator speed is very critical because it affects the shape of the deceleration response and it determines the accuracy of the predicted stopping distance. The autonomous braking control algorithm is designed based on the predicted stopping distance. The proposed autonomous braking system has been validated in autonomous vehicle tests and demonstrates that the subject vehicle can avoid the collision effectively.
29 citations
TL;DR: The proposed algorithm is based on a model predictive control framework and is able to optimally tackle several control goals, such as maximization of energy recuperation and wheel slip regulation, while taking into account actuation dynamics and constraints.
Abstract: This paper presents a predictive braking control algorithm for electric vehicles with redundant braking actuators, composed of friction brake actuator(s) and electric motor(s). The proposed algorithm is based on a model predictive control framework and is able to optimally tackle several control goals, such as maximization of energy recuperation and wheel slip regulation, while taking into account actuation dynamics and constraints. The braking control algorithm was simulated and experimentally validated on the ROMO research vehicle. The obtained results demonstrate that in comparison with state-of-the-art control techniques, the proposed model predictive control approach is able to reduce the torque tracking error up to 60%, and improve the deceleration during emergency braking up to 10%.
29 citations
Patent•
07 Apr 1999
TL;DR: In this paper, a method for reducing the braking distance of a vehicle with a brake booster which during a standard braking operation is controlled only by braking pedal pressure exerted by the driver and which, in the event of a critical situation, is controlled by the control device in such a way that a booster factor (Μ) which is higher than that of the standard braking operations is set for the brake booster.
Abstract: The invention relates to a method for reducing the braking distance of a vehicle with a brake booster which during a standard braking operation is controlled only by braking pedal pressure exerted by the driver and which, in the event of a critical situation is controlled by the control device in such a way that a booster factor (Μ) which is higher than that of the standard braking operation is set for the brake booster. The invention is characterised in that a risk potential (Δ) is determined. This risk potential gives the probability of the braking vehicle being involved in an accident. The booster factor (Μ) is then increased in accordance with the risk potential (Δ).
29 citations
Patent•
27 Dec 2007TL;DR: In this paper, a braking cooperative control portion calculates a total braking force (power) required for the entire vehicle based on a brake depression force BK of a driver and also controls the shares of the output of the total braking forces between a hydraulic brake and the motor generator.
Abstract: A regeneration control portion sets a torque command value (in general, a negative value) of a motor generator at a time of regenerative braking. A braking cooperative control portion calculates a total braking force (power) required for the entire vehicle based on a brake depression force BK of a driver and also controls the shares of the output of the total braking force between a hydraulic brake and the motor generator. An MG-ECU drives and controls the motor generator so that a regenerative torque is generated according to a torque command value. The regeneration control portion puts a limitation such that the absolute value of the regenerative torque is smaller at a time of downhill travel than at a time of flat-road travel, for the same brake operation.
29 citations
Patent•
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03 May 1988
TL;DR: In this article, an electric motor brake which uses a simplified circuit enabling a timed injection of DC voltage into the motor windings of an induction motor is presented, which will bring the rotor, and whatever is connected to it, to a stop in a rapid fashion.
Abstract: The subject invention is an electric motor brake which uses a simplified circuit enabling a timed injection of DC voltage into the motor windings of an induction motor. This DC voltage acts as a dynamic braking force and will bring the rotor, and whatever is connected to it, to a stop in a rapid fashion. An additional advantage of the invention is that it may be constructed and used as a stand alone device which may be attached to any electrical induction motor to achieve the desired braking effect. A further feature of the invention is the provision of a timing circuit that it is designed to be user adjusted to achieve the maximum possible effect rather than using a fixed design which would result in a compromise in order to be suited for wide usage.
29 citations