Avoiding creep groan: Investigation on active suppression of stick-slip limit cycle vibrations in an automotive disk brake via piezoceramic actuators

Zhao, Xingwei; Gräbner, Nils; Wagner, Utz von

doi:10.1016/j.jsv.2018.10.049

Cited by 35 publications

(11 citation statements)

References 29 publications

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“…The two pads are in point contact with the disk and are considered only to move in “out‐of‐plane” direction. In [9–11]. extended models with additional degrees of freedom of the pads are considered.…”

Section: Modeling and Limit Cycles Of Stick‐slip Motionmentioning

confidence: 99%

“…considered Coulomb friction with a difference between the maximal static and dynamic friction forces to describe the stick‐slip effect as the origin of creep groan. However, it is found, that the simple Coulomb's friction law cannot explain the bifurcation behavior of Hopf type, which is measured in experiments9–12 especially the parameter region with unstable equilibrium solution.…”

Section: Introductionmentioning

confidence: 99%

“…Also in previous works of the authors, the bifurcation behavior of creep groan was studied numerically and a corresponding map reflecting regions with qualitatively different behavior was plotted in [9–11]. In contrast to the work of Papangelo, our research focuses on classifying creep groan with respect to its bifurcation behavior (which is exhibited as a map of creep groan later).…”

Section: Introductionmentioning

confidence: 99%

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Analytical analysis of the bifurcation behavior of creep groan

et al. 2019

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Creep groan is one of the low frequency vibration phenomena, which can be observed in automotive disk brakes at low driving speeds [1]. In order to study fundamental mechanisms of creep groan, a model with bristle friction law was set up, for which the bifurcation behavior was studied numerically. A corresponding map reflecting regions with qualitatively different behavior was obtained and compared with experimental results [9–11]. In the work described in this paper, an analytical study based on an approach presented in [13, 14] is proposed as an alternative way to map the bifurcation behavior. The corresponding nonlinear model shows that the system may have three different parameter regions with different types of asymptotically stable solutions, i.e. an equilibrium solution, a stick‐slip limit cycle, and coexistence of them. The stick‐slip limit cycle can be interpreted as the origin of creep groan in a vehicle while the equilibrium solution is the desired non‐vibrating solution. As the regions reflect the risk of generation of creep groan, it can be used to evaluate the robustness of brake systems against creep groan. The analytical study is verified by experimental results.

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Section: Modeling and Limit Cycles Of Stick‐slip Motionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analytical analysis of the bifurcation behavior of creep groan

et al. 2019

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“…Due to the dramatic increase in the number of complaints about brake creep groan, much attention has recently been paid to this problem in the automotive industry. To understand the mechanism and find the countermeasures of brake creep groan, much research has been conducted on vehicles [3][4][5], brake dynamometers [6][7][8], tribometers [9][10][11][12], and chassis dynamometers [13]. Creep groan-related vibrations from the caliper/knuckle could be transferred to the lower arm and then to the frame front and the rear MTG to body, or be transferred to the strut and then to the body, giving rise to an uncomfortable structurally borne noise.…”

Section: Introductionmentioning

confidence: 99%

“…Experimentally, researchers have studied varied creep groan phenomena and the effects of structural parameters on creep groan, such as sliding stick-slip [7,12,14], torsional stick-slip of torque [15], tangential or torsional stiffness [9,10], and variations of caliper, suspension, chassis, and drivelines [12,13]. e tribological parameters of pad-disc interface are also characterized in terms of varied friction models such as LuGre and the bristle friction law in addition to the Coulomb and Stribeck model with varied slopes, magnitudes, and gap of static and dynamic friction coefficients [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Sensing and Quantifying a New Mechanism for Vehicle Brake Creep Groan

Meng

Zhang

et al. 2019

Shock and Vibration

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This paper investigates the creep groan of a vehicle’s brake experimentally, analytically, and numerically. Experimentally, the effects of acceleration on caliper and strut, noise, brake pressure, and tension are measured. The results show that the measured signals and their relevant spectra broadly capture the complex vibrations of creep groan. This includes the simple stick-slip, severe stick-slip vibrations/resonances, multiple harmonics, half-order harmonics; stick-slip-induced impulsive vibrations, steady/unstable vibrations, and their transitions. Analytically, a new mathematical model is presented to capture the unique features of half-order harmonics and the connections to fundamental stick-slip/resonant frequency and multiple harmonics. The analytical solution and the experimental results show that the vibro-impact of the brake pad-disc system can be triggered by severe stick-slip vibrations and is associated with instable, impulsive stick-slip vibration with wideband. The induced stick-slip vibro-impact can evolve into a steady and strong state with half-order, stick-slip fundamental, and multiple-order components. This new mechanism is different from all previously proposed mechanisms of creep groan in that we also view some type of creep groan as a stick-slip vibration-induced vibro-impact phenomenon in addition to conventional stick-slip phenomena. The new mechanism comprehensively explains the complex experimental phenomena reported in the literature. Numerically, the salient features of phase diagrams of instable stick-slip and vibro-impact are examined by using a seven-degree-of-freedom brake system model, which shows that the phase diagrams of the dynamics of creep groan with and without vibro-impact are substantially different. The phase diagram of the dynamics with vibro-impact is closer to the experimental results. In contrast to existing mechanisms, the proposed new mechanism encompasses the instable stick-slip nature of creep groan and elaborates the inherent connections and transition of the spectrogram. The new knowledge can be used to attain critical improvements to brake noise and vibration analysis and design. By applying the proposed new model in addition to existing models, all experimental phenomena in creep groan are elaborated and quantified.

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Suppression of friction-induced-vibration in MDoF systems using tangential harmonic excitation

Liu

Ouyang

2020

Meccanica

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This paper investigates the effects of tangential harmonic excitation on the friction-induced-vibration in multi-degree-of-freedom systems that are coupled in the tangential and normal directions. A minimal two-degree-of-freedom system and a more complicated slider-on-disc system are considered. It is observed the friction-induced-vibration of the systems can be suppressed with the tangential harmonic excitation when the amplitude and frequency of the excitation are in certain ranges. The analytical method to determine the ranges where the systems are stabilized by the tangential excitation is established. To verify the analytical results, a great amount of computational effort is also made to simulate the time responses of systems in various combinations of values of the amplitude and frequency, by which the parameter ranges where the friction-induced vibration is suppressed can also be obtained. This research can provide theoretical guidance for the suppression of friction-induced-vibration in a real disc brake system by application of a tangential harmonic excitation.

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Avoiding creep groan: Investigation on active suppression of stick-slip limit cycle vibrations in an automotive disk brake via piezoceramic actuators

Cited by 35 publications

References 29 publications

Analytical analysis of the bifurcation behavior of creep groan

Analytical analysis of the bifurcation behavior of creep groan

Sensing and Quantifying a New Mechanism for Vehicle Brake Creep Groan

Suppression of friction-induced-vibration in MDoF systems using tangential harmonic excitation

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