Excitation and Transfer Mechanism of Brake Judder

Gaßmann, Stefan; Engel, Hans Georg

doi:10.4271/931880

Cited by 20 publications

(16 citation statements)

References 1 publication

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“…The wheel suspension amplifies the vibrations, especially the frequencies near its eigenfrequencies (for more details see [126]). The second amplification of the vibration is associated withthe steering system.…”

Section: Bpv / Btv Sourcesmentioning

confidence: 99%

Brake comfort – a review

Cantoni

Cesarini

Mastinu

et al. 2009

Vehicle System Dynamics

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Several state of the art papers and even books on brake vibration and/or noise have been presented in the literature. Many of them have analytically and sharply accounted for the impressive amount of research undertaken on this topic. This state of the art review focuses on the still-open questions that appear crucial from the perspective of a leading brake manufacturer. The paper deals with the phenomena of brake vibration and/or noise, the experimental and theoretical methods for studying such phenomena, and the actions that are identified to be necessary to definitely solve the addressed problem. Key topics are the modelling of friction, the modelling of the dynamics of the brake as a non-linear system subjected to deterministic or random (parametric) excitation, the proper modelling of the contact between the disc and the pad, and the experimental validation of the mathematical models.

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Section: Bpv / Btv Sourcesmentioning

confidence: 99%

Brake comfort – a review

Cantoni

Cesarini

Mastinu

et al. 2009

Vehicle System Dynamics

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show abstract

“…This implies that the brake torque tracking error will converge to zero if the last three terms sum to zero. By scrutinizing the last three terms in (10) and let their sum to be zero, this suggests the following compensator structure: (12) where current estimate of (11) is given by (13) Noted that and are the estimates of and respectively. These quantities are estimated using the following adaptive control law: (14) where g > 0 is the compensator gain.…”

Section: Figure 2 Btv Compensator Structurementioning

confidence: 99%

“…Gassmann and Engel [12] investigated the excitation and transfer mechanism of brake judder experimentally in streetgoing vehicles, and determined the interactions between excitation and transfer mechanism. Based on this result, a holistic approach to the attenuation of brake judder was suggested in [13] by considering the total system, including the brakes, the suspension and the steering system.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Brake Torque Variation Compensation for an Electromechanical Brake

Lee¹,

Manzie²

2012

SAE Int. J. Passeng. Cars - Electron. Electr. Syst.

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A novel method for attenuation of brake judder directly at the source is proposed, utilizing an electromechanical brake to actively compensate for the variation in brake torque that causes judder. Taking advantage of the high-bandwidth closed-loop clamp force tracking performance offered by an electromechanical brake, an adaptive compensator is designed to estimate the brake torque variation (BTV), and to produce a compensating clamp force command to cancel it. The compensator is tested over fixed and varying BTV frequencies by employing a production-ready prototype EMB. It is demonstrated that significant BTV attenuation is obtained using the proposed approach.

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“…To analyze the brake judder, global and local transfer functions were defined (Gassmann and Engel, 1993). From this study, it was found that in order to reduce the brake judder, the longitudinal motion of the knuckle and the tangential motion of the steering wheel should be decoupled.…”

Section: Introductionmentioning

confidence: 99%

Investigation of influential factors of a brake corner system to reduce brake torque variation

Kim

Han

Kang

et al. 2008

Int.J Automot. Technol.

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This paper investigates the brake corner system to reduce brake torque variation in the brake judder problem. A numerical model for determining brake torque variation was constructed using the multi-body dynamics model. Using this model, the brake torque variation for a given disc thickness variation was obtained in the time domain. The multi-body dynamics model was verified by a dynamometer test via the comparison of brake torque variation and load distribution patterns of the pad. To reduce the simulation time and cost required to determine factors that influence the reduction in brake torque variation, a simple mathematical model was constructed and used to determine both the brake torque variation and influential factors. The multi-body dynamics model and dynamometer test were modified on the basis of the results of the simple mathematical model and deformed shape of the multi-body dynamics model. These influential factors were verified to reduce the brake torque variation.

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Excitation and Transfer Mechanism of Brake Judder

Cited by 20 publications

References 1 publication

Brake comfort – a review

Brake comfort – a review

Adaptive Brake Torque Variation Compensation for an Electromechanical Brake

Investigation of influential factors of a brake corner system to reduce brake torque variation

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