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Journal articles on the topic 'Judder'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Jacobsson, H. "Aspects of Disc Brake Judder." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 217, no. 6 (June 1, 2003): 419–30. http://dx.doi.org/10.1243/095440703766518069.

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Brake judder is a braking induced, forced vibration occurring in different types of vehicles. The judder frequency is directly proportional to the revolution speed of the wheel and therefore also to the velocity of the vehicle. The driver experiences judder as vibrations in the steering wheel, brake pedal and floor. In the higher frequency range, the structural vibrations are accompanied by a sound. Brake judder primarily affects the comfort but could, when confronting an inexperienced driver for the first time, lead to faulty reactions and reduced driving safety. Furthermore, a specific type of judder, so-called hot judder, is related to disc cracking. There are numerous publications available dealing with high frequency vibrations, such as brake squeal, including mathematical models for analysis and simulation. However, low frequency phenomena, such as brake judder and groan, have received much less attention. There is a growing interest from the automotive industry concerning brake judder. Even though few companies would admit that they have the problem, it is not unusual to meet people who have experienced the problem in their own passenger cars. Much of the knowledge concerning brake judder remains within the companies. Hence, very few people have the full picture. The purpose of the present paper is to give an overview of the brake judder problem.

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2

Ishak, Mohd Razmi, Abd Rahim Abu Bakar, Subki Shamsudin, Muhammad Husaini Maskak, and Mohd Kameil Abdul Hamid. "Experimental Investigation of Low Speed Disc Brake Judder Vibration." Applied Mechanics and Materials 471 (December 2013): 25–29. http://dx.doi.org/10.4028/www.scientific.net/amm.471.25.

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Brake judder is defined as disc or drum deformation-induced vibration which typically occurs at frequency less than 200 Hz. There are two types of brake judder namely, low speed (cold) judder and high speed (hot) judder. These two types of judder are often causing the brake pedal, steering wheel, suspension or chassis to vibrate. Consequently, it will affect comfort level of the driver and passengers. This paper focuses on the experimental investigation of low speed brake judder. In doing so, a laboratory test rig consists of disc brake unit, steering and suspension systems was used to assess level of brake judder vibration at different wheel turning angles. It was found that brake judder generated slightly high vibration at the steering wheel in the axial direction which led to a little uncomfortable feeling to the driver.

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3

Bengsoon, Matthias Edric, Abd Rahim Abu Bakar, and Mohd Kameil Abdul Hamid. "Structural Modification of Disc Brake Judder Using Finite Element Analysis." Applied Mechanics and Materials 165 (April 2012): 68–72. http://dx.doi.org/10.4028/www.scientific.net/amm.165.68.

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Brake judder is a phenomenon of noise which its vibration can be felt physically by the driver of a vehicle. If this vibration is exposed to the driver for a long period it can lead to tiredness during driving. There are two types of judder which is cold judder and hot judder. This paper will be focusing on the hot judder. As a disc surface heats up during braking it causes both sides of the disc distort and hence produce a sinusoidal waviness around its edges. In this paper finite element analysis of hot judder is performed using a commercial software package, ABAQUS. An existing brake disc design is simulated and will be used as a baseline model. Various structural modifications made on the disc are proposed in an attempt to reduce brake judder in a disc brake assembly.

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4

Xu, Xinfu, and Hermann Winner. "Transfer behaviours and influences of high-order hot judder in passenger cars." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, no. 3 (May 7, 2017): 400–417. http://dx.doi.org/10.1177/0954407017702995.

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Hot judder consists of brake-induced forced vibrations which are characterized by hot spots on the brake discs. It mainly influences the driving comfort as perceived by the driver as vibrations and low-frequency noises. This article concentrates on the transfer behaviours of high-order hot judder and its effects on the driver’s subjective perception. A novel testing method is applied in this investigation, simulating the high-order hot judder by using discs that are artificially modified to generate tenth-order disc thickness variations or tenth-order lateral run-out. A high quality is achieved with respect to identification of the transfer functions from the brake pressure variation and the brake torque variation to the essential driver interface quantities of hot judder. The threshold values of the brake pressure variation and the brake torque variation for perception of the high-order hot judder in a high-frequency range are obtained on the basis of a regression analysis between subjective evluaitons and objective evaluations of the hot-judder-induced vibrations and the selected critical sound pressure level inside a vehicle. Generally, a brake pressure variation of more than 10 bar or a brake torque variation of 100 Nm is required for perception of the high-order judder-induced vibrations, whereas a brake torque variation of 50 Nm can result in annoying noises. According to the transfer functions and the threshold values of the brake pressure variation and the brake torque variation, the drone noise is shown to be the main reason for potential customer complaints arising from high-order hot judder. The practical significance of high-order judder to the driver’s perception is suitably quantified for the first time. Also, with these results, the impacts of high-order hot judder can be assessed from the observed brake pressure variation and the observed brake torque variation, which are mainly measured using dynamometers.

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5

Yuan, Renfei, and Guangqiang Wu. "Mechanism analysis of vehicle start-up judder based on gradient characteristic of Stribeck effect." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 2-3 (July 5, 2019): 505–21. http://dx.doi.org/10.1177/0954407019859820.

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This paper presents a profound mechanism investigation for vehicle start-up judder phenomenon using a combination of experiment and simulation. First, from the experimental analysis, the characteristic frequency of start-up judder is mainly concentrated at about 9 Hz. A 13-degree-of-freedom powertrain branched model is established to numerically reproduce experimental phenomenon. The validity and accuracy of simulation model in reflecting the characteristics of start-up judder are verified by the experimental results in time–frequency domain. Second, through analyzing clutch friction torque, it can be concluded that the closed-loop positive feedback mechanism caused by the negative gradient characteristic of Stribeck effect is the determining factor for the start-up judder. It promotes aggravated fluctuation in rotational speed of clutch driven plate. The introduction process of negative damping that makes powertrain system divergent is explained in detail. Finally, two theoretical measures are proposed to suppress the vehicle start-up judder. One of the measures is to diminish the absolute value of the negative gradient. It weakens the aggravation effect of the closed-loop positive feedback and hence attenuates the start-up judder. Another measure is to change to positive gradient. It forms a closed-loop negative feedback process that causes the almost disappearance of start-up judder. The effectiveness of the two suppression measures verifies the correctness of the start-up judder mechanism proposed in this paper.

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6

Ma, Biao, Likun Yang, Heyan Li, and Nan Lan. "Hot judder behavior in multidisc clutches." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 231, no. 1 (August 5, 2016): 136–46. http://dx.doi.org/10.1177/1350650116648069.

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This paper presents an investigation of the hot judder phenomenon of multidisc clutches, which takes place during the engagement process. Depending on the results of finite element analysis, a pressure distribution function is defined and a contact pressure equation is established to demonstrate the non-uniformity of the contact pressure distribution on the friction interfaces due to frictional heat. The relationship between the coefficient of friction and the temperature is analyzed. A 4 degrees of freedom power-train model is developed to evaluate the clutch judder behavior. The paper indicates that the clutch judder is influenced by the non-uniformity of the interface contact pressure distribution, which is excited by frictionally induced thermal load. The non-uniform contact pressure distributions along the radial direction have a slight influence on the clutch judder, while the uneven contact pressure distributions along the circumference contribute to the judder substantially. Furthermore, the results in this work can be used to study the operation instability and the thermal failure of clutches.

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7

MORIMURA, Hiroaki, Akio NAGAMATSU, and Yousuke OGAWA. "109 Simulation in Clutch Judder." Proceedings of the Symposium on Environmental Engineering 2005.15 (2005): 27–30. http://dx.doi.org/10.1299/jsmeenv.2005.15.27.

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8

Yang, Li-kun, He-yan Li, Mehdi Ahmadian, and Biao Ma. "Analysis of the influence of engine torque excitation on clutch judder." Journal of Vibration and Control 23, no. 4 (August 9, 2016): 645–55. http://dx.doi.org/10.1177/1077546315582291.

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A simplified three-degree-of-freedom dynamic model with nonlinear friction torque and engine torque excitation, capable of identifying the effect of the engine excitation on clutch judder, is presented. The analysis of harmonic order is performed and a sinusoidal contact pressure between friction surfaces is considered, along with an analytical solution for the relative angular velocity of the clutch plates. The average fluctuation amplitude of the clutch relative angular velocity is used to evaluate the judder. Numerical calculations indicate that the clutch judder increases significantly when the angular velocity of the crankshaft, corresponding to the harmonic orders of the engine, is equal or close to the natural frequency of the driveline. An identical frequency of the engine excitation and the oil pressure fluctuation contributes little to the clutch judder, unless the excitation is at or near the resonance frequency. The amplitudes of oscillations due to the engine excitation grow when the pulsating torque of the engine increases. The mean torque of the engine has little influence on the judder, although it governs the clutch engagement time. The results further show that clutch judder attenuates as the torsional stiffness of the system increases.

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9

Lee, Kwangjin, and Frank W. Brooks,. "Hot Spotting and Judder Phenomena in Aluminum Drum Brakes." Journal of Tribology 125, no. 1 (December 31, 2002): 44–51. http://dx.doi.org/10.1115/1.1506315.

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Hot spotting and judder phenomena were observed in automotive aluminum drum brakes. A vehicle judder test schedule was developed to determine the critical speed for thermoelastic instability (TEI). The brake material properties relevant to the TEI analysis were measured as a function of temperature. The critical speeds for the brake systems with different drum materials were determined by the judder schedule and they are compared with the analytical predictions of Lee (2000). The brake drums and linings were then modified and tested in order to investigate its effects on the hot spotting and judder propensity. The design modifications include brake linings with a different compound, stress-relieved drums, linings with a convex or concave surface finish, three-segmented linings, and linings with a circumferential groove. The linings with a circumferencial groove effectively reduce the size of hot spots and the best judder rating was achieved.

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10

Cho, Ho Joon, Chong Du Cho, Myoung Gu Kim, Ju Wong Maeng, and Sang Kyo Lee. "A Study of Judder Vibration in Automotive Disk Brakes." Key Engineering Materials 326-328 (December 2006): 1301–4. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1301.

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In this experimental paper, the judder vibration of automotive disk brake was analyzed by the finite element method and compared with experimental results. The relationship between specific modes of disk and pad, and hot spot was investigated. Characteristics of the judder vibration were measured by using the chassis-dynamo and hot spots were photographed by highspeed infrared camera. Vibration modes of the brake disk and pad were measured and an specific relationship between mode shapes and hot spots was found. Results show that the judder vibration occurred due to the frequency modulation of the specific mode frequency of disk brake due to the non-linearity phenomenon. This relationship was examined by the frequency analysis of the judder vibration.

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11

Yuan, Renfei, and Guangqiang Wu. "Dynamic analysis of vehicle start-up judder based on elasto-plastic friction model and dry clutch maneuvering characteristic." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 233, no. 2 (April 13, 2018): 455–69. http://dx.doi.org/10.1177/1464419318768157.

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This paper presents a detailed investigation of the dry clutch engagement process, and vehicle start-up judder phenomenon that could result in the deterioration of vehicle ride comfort. Elasto-plastic friction model is elaborated through the slider-pulley system, which shows some friction characteristics such as presliding, stick-slip motion, Stribeck effects, etc., and applied to dry clutch. The axial compression characteristics of three elastic parts, which include diaphragm spring, cushion spring, and link strip have been taken into consideration, and nonlinear relationship between the release bearing travel and the clutch clamp force is also established. The powertrain system model of front-engine and front-wheel-drive vehicle equipped with manual transmission is set up to recreate the start-up judder phenomenon in the numerical simulation and analyze its mechanism. The sudden transfer of the engine torque during the clutch engagement process results in the initial judder, which can be supposed as the step response of system and is initially weakened due to the damping of the powertrain system. Then the judder gradually strengthens and gets in the most severe vibrance when the clutch is about to get in to the fully engaged state, which is related to the frictional characteristics that forms a closed-loop positive feedback system, as well as the frequent state transitions between sliding state and engaged state. The positive slope of Stribeck effect as well as the reduction of absolute value of negative slope can both effectively suppress the start-up judder, and the apparent judder occurs only if the negative slope is outside of a certain range, instead of in all of the range. In addition, the fluctuation of clutch clamp force can aggravate the start-up judder, in which a more chaotic oscillation is emerged.

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12

Yu, Liang, Biao Ma, Il yong Kim, and Heyan Li. "Influences of the uneven contact pressure and the initial temperature on the hot judder behavior in a multi-disc clutch." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 234, no. 4 (August 13, 2019): 500–514. http://dx.doi.org/10.1177/1350650119869450.

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This paper presents an investigation of the hot judder behavior in a multi-disc clutch with the uneven contact pressure and the initial temperature taken into account. Considering the actual structure of clutch, the pressure function is achieved to describe the uneven contact pressure distribution due to the circlip constraint. Moreover, the pin-on-disc test is conducted to obtain the formula of the coefficient of friction with the contact pressure, surface temperature, and rotating speed involved. The thermal and dynamic models are established and coupled to evaluate the hot judder behavior. The results demonstrate that the uneven contact pressure has a slight influence on the clutch hot judder, but it expands the radial temperature difference on the friction surface; meanwhile, the friction torque generated on the friction surface closer to the circlip is larger. Although the increase of initial temperature can shorten the clutch engagement time, the clutch hot judder will be shriller, as verified in the SAE#2 bench test. Furthermore, in order to reduce the clutch hot judder, the circlip should be optimized to smooth the radial contact pressure, and the advanced thermal management method should be applied to strengthen the clutch heat dissipation.

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13

Do, Hyun Jung, Pil Jung Sung, and Sun Chung Won. "Numerical Analysis Technique to Estimate the Reliability of a Disc Brake System – Hot Judder Simulation." Applied Mechanics and Materials 152-154 (January 2012): 723–26. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.723.

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Hot judder characteristics of a ventilated disc brake system are discussed. Three dimensional finite element models of the ventilated disc, pads and pistons are created, and a fully coupled thermo-mechanical analysis of the hot judder phenomenon of the disc brake system is performed using SAMCEF. The brake dynamo test is carried out according to the high speed judder test mode. The evolution of the temperature distribution on the disc surface is described, and the hot spot generation process is investigated. The simulation results such as the maximum disc temperature, BTV are compared to the data from the dynamo test, and the reliabilities of the analysis technique and simulation model presented in this paper are verified.

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14

MORIMURA, Hiroaki. "Analysis of Occurrence Condition in Clutch Judder." Transactions of the Japan Society of Mechanical Engineers Series C 69, no. 682 (2003): 1543–49. http://dx.doi.org/10.1299/kikaic.69.1543.

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15

Chapiro, Alexandre, Robin Atkins, and Scott Daly. "A Luminance-aware Model of Judder Perception." ACM Transactions on Graphics 38, no. 5 (November 5, 2019): 1–10. http://dx.doi.org/10.1145/3338696.

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16

SANDO, Katsuhiko, Takeshi YAMAMOTO, Shin HASHIMOTO, Seiichi SHIN, and Kenji SAWADA. "J101012 Clutch Judder Suppression with H∞ Control." Proceedings of Mechanical Engineering Congress, Japan 2013 (2013): _J101012–1—_J101012–5. http://dx.doi.org/10.1299/jsmemecj.2013._j101012-1.

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17

Larimer, James, Jennifer Gille, and James Wong. "41.2: Judder-Induced Edge Flicker in Moving Objects." SID Symposium Digest of Technical Papers 32, no. 1 (2001): 1094. http://dx.doi.org/10.1889/1.1831749.

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18

OGAWA, Yousuke, Hiroaki MORIMURA, and Akio NAGAMATSU. "21013 Simulation analysis of clutch judder in automobile." Proceedings of Conference of Kanto Branch 2006.12 (2006): 77–78. http://dx.doi.org/10.1299/jsmekanto.2006.12.77.

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19

Young Ho Lee, Seungjoon Yang, and Sunghee Kim. "Judder-free reverse pull-down using dynamic compensation." IEEE Transactions on Consumer Electronics 51, no. 1 (February 2005): 256–61. http://dx.doi.org/10.1109/tce.2005.1405729.

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20

Heckmann, Andreas, Bernhard Kurzeck, Antonio Carrarini, Frank Günther, and Kaspar Schroeder-Bodenstein. "Influences on nonlinear judder vibrations of railway brakes." Vehicle System Dynamics 48, no. 6 (June 2010): 659–74. http://dx.doi.org/10.1080/00423110903023329.

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21

Kaneko, H. "Judder analysis of electronically controlled limited slip differential." JSAE Review 17, no. 1 (January 1996): 31–36. http://dx.doi.org/10.1016/0389-4304(95)00046-1.

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22

Kume, Koki, Ryu Takahiro, Nakae Takashi, and Iwamoto Mituo. "Fundamental study on Hot Judder of the automotive disc brake." Proceedings of the Dynamics & Design Conference 2016 (2016): 103. http://dx.doi.org/10.1299/jsmedmc.2016.103.

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23

Hwang, I.-J., and G.-J. Park. "Mode and design sensitivity analyses for brake judder reduction." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 222, no. 7 (July 2008): 1259–72. http://dx.doi.org/10.1243/09544070jauto314.

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24

Altuzarra, Oscar, Enrique Amezua, Rafael Avilés, and Alfonso Hernández. "Judder vibration in disc brakes excited by thermoelastic instability." Engineering Computations 19, no. 4 (June 2002): 411–30. http://dx.doi.org/10.1108/02644400210430181.

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25

Hausner, Markus, and Martin Häßler. "Clutch Disc with Frequency Damper to Prevent Judder Vibrations." ATZ worldwide eMagazine 114, no. 1 (January 2012): 42–47. http://dx.doi.org/10.1365/s38311-012-0136-6.

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26

Oh, Se Ri, Seyoon Jeong, Pyeonggang Heo, Dongchan Kim, Hui Yong Kim, and HyunWook Park. "A New No-Reference Method for Judder Artifact Assessment." IEEE Transactions on Circuits and Systems for Video Technology 29, no. 10 (October 2019): 2888–98. http://dx.doi.org/10.1109/tcsvt.2018.2875157.

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27

Deleener, Jan. "Avoiding Judder by means of an effective transmission design." ATZ worldwide 114, no. 5 (May 2012): 34–38. http://dx.doi.org/10.1007/s38311-012-0201-1.

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28

Kim, Youngman, Sangjin Jeong, Van-Quyet Nguyen, Kwangsuck Boo, and Heungseob Kim. "Design of Hydraulic Bushing and Vehicle Testing for Reducing the Judder Vibration." MATEC Web of Conferences 167 (2018): 02012. http://dx.doi.org/10.1051/matecconf/201816702012.

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Generally, judder vibration is a low-frequency vibration phenomenon caused by a braking force imbalance that occurs when a vehicle is lightly decelerated within a range of 0.1 to 0.2g at a speed of 120 to 60 km/h. This comes from the change in the brake disk thickness (DTV), which is mainly caused by the side run-out (SRO) and thermal deformation. The adoption of hydro-bushing in the low arm G bushings of the vehicle front suspension has been done in order to provide great damping in a particular frequency range (<20Hz) in order to prevent this judder vibration from being transmitted to the body. The hydro bushing was formulated using a lumped parameter model. The fluid passage between the two chambers was modelled as a nonlinear element such as an orifice, and its important parameters (resistance, compliance) were measured using a simplified experimental setup. The main design parameters are the ratio of the cross-sectional area of the chamber to the fluid passage, the length of the fluid passage, etc., and their optimal design is such that the loss angle is greater than 45 ° in the target frequency range of 10 to 20 Hz. The hydro bushing designed for reducing the judder vibration was prepared for the actual vehicle application test and applied to the actual vehicle test. In this study, the proposed hydro bushing was applied to the G bushing of the low arm of the front suspension system of the vehicle. The loss angle of the manufactured hydro bushing was measured using acceleration signals before and after passing through the bushing. The actual vehicle test was performed on the noise dynamometer for the performance analysis of the judder vibration reduction.

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29

Jacobsson, H. "Disc brake judder considering instantaneous disc thickness and spatial friction variation." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 217, no. 5 (May 1, 2003): 325–42. http://dx.doi.org/10.1243/095440703321645043.

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Brake judder is a braking-induced vibration. The character of judder is typical of forced vibrations passing through a critical speed. No specific friction characteristic is needed for judder to occur. In two previous models, i.e. a rotor-stator model and a whole vehicle model, the vibration during a brake application was simulated. The vibrations were assumed to be driven by a brake torque variation (BTV) during a wheel revolution. The BTV was assumed to be proportional to the brake pressure variation (BPV) which was measured. Moreover, the proportionality constant was assumed to be independent of the braking conditions. Verifying measurements were made on a street going vehicle with strong disc thickness variation (DTV) on one of its front wheels. The measured vibration variation during braking was predicted almost exactly by the models. However, the maximum measured vibration level could only be approximated. In the present paper a more accurate analysis of the measurements was found to improve strongly the agreement between predicted and measured vibrations. Hence, the deviation in slope between measured and experimentally generated curves was markedly reduced by replacing the overall mean values of brake pressure level, etc. by slowly varying time functions. The new extended model of the present paper takes into account that the BTV may be generated by variations in normal force (i.e. BPV) and other synchronous variations (called BXV), e.g. spatial friction variation and variation of the equivalent brake radius. The result indicates that BXV may be induced by high BPV levels. Even at judder vibrations primarily caused by heavy DTV (20 μm or more in the cold state), there may be considerable contributions to the vibration level from other synchronous disturbances, i.e. BXV. Further, it was found that the pad stiffness increases with the brake pressure. For such a pad stiffness characteristic, an increase of the DTV level (for whatever reason) by 50 per cent might result in more than a 100 per cent increase in the corresponding BPV and BTV levels. Hence, a progressive pad is more sensitive to increases of the DTV level than a linear pad would be.

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30

Kim, Seonghwan, Sungsun Cho, and Junghwan Lee. "A Study for High Speed Judder Evaluation on Brake System." Transactions of the Korean Society for Noise and Vibration Engineering 23, no. 6 (June 20, 2013): 485–94. http://dx.doi.org/10.5050/ksnve.2013.23.6.485.

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31

Lee, Chih Feng, Dzmitry Savitski, Chris Manzie, and Valentin Ivanov. "Active Brake Judder Compensation Using an Electro-Hydraulic Brake System." SAE International Journal of Commercial Vehicles 8, no. 1 (April 14, 2015): 20–26. http://dx.doi.org/10.4271/2015-01-0619.

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32

Lee, GirHyoung, KukHyoun Kang, and DongKyu Lee. "Characteristics of Aggression and Brake Judder by Different ZrSiO4Particle Size." Transactions of the Korean Society of Automotive Engineers 22, no. 7 (November 1, 2014): 144–51. http://dx.doi.org/10.7467/ksae.2014.22.7.144.

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33

Chen, S. M., D. F. Wang, and J. M. Zan. "Brake judder analysis using a car rigid–flexible coupling model." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 226, no. 3 (September 16, 2011): 348–61. http://dx.doi.org/10.1177/0954407011417760.

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34

Larimer, James, Christine Feng, Jennifer Gille, and Victor Cheung. "31:3 Judder-Induced Edge Flicker at Zero Spatial Contrast." SID Symposium Digest of Technical Papers 34, no. 1 (2003): 1042. http://dx.doi.org/10.1889/1.1832466.

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35

Sonehara, Hajime, Yuji Nojiri, Kazuhisa Iguchi, Yukio Sugiura, and Hiroshi Hirabayashi. "Reduction of Motion Judder on Video Images Converted from Film." SMPTE Journal 106, no. 8 (August 1997): 535–40. http://dx.doi.org/10.5594/j04556.

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36

Gkinis, T., Ramin Rahmani, and H. Rahnejat. "Effect of clutch lining frictional characteristics on take-up judder." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 231, no. 3 (May 22, 2017): 493–503. http://dx.doi.org/10.1177/1464419317708946.

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37

Bartlett, H., and R. Whalley. "Power transmission system modelling." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 212, no. 6 (June 1, 1998): 497–505. http://dx.doi.org/10.1243/0954406981521394.

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This paper employs hybrid modelling techniques in the investigation of the dynamic performance of ‘long’ driveshafts, which include a clutch and load, for power transmission purposes. The power transmission system considered is suitable for a wide variety of applications in which the load is coupled directly to the clutch and hence to the ‘long’ driveshaft. Owing to the length of the shaft and relatively pointwise location of the clutch and load, a distributed—lumped (D—L) description of the arrangement is investigated. This enables the behaviour of the dispersed driveline shaft to be ‘adequately’ replicated along with the connecting elements. A discrete modelling approach is adopted and analysis and simulated response characteristics are presented, thereby validating the technique. Existing results on clutch judder are referred to and the interaction between judder and the driveshaft torsional oscillation is commented upon.

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38

Lee, Yongsan, Hojoon Cho, Chongdu Cho, and Chang-Boo Kim. "OS10-1-5 Heat flow analysis of judder in the disk brake by using thermocouple." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2007.6 (2007): _OS10–1–5——_OS10–1–5—. http://dx.doi.org/10.1299/jsmeatem.2007.6._os10-1-5-.

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39

Sivanesan, M., and G. Jayabalaji. "Modelling, Analysis and Simulation of Clutch Engagement Judder and Stick-Slip." SAE International Journal of Passenger Cars - Mechanical Systems 10, no. 1 (October 17, 2016): 54–64. http://dx.doi.org/10.4271/2016-01-2355.

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40

Doi, K. "Brake judder reduction technologyâbrake design technique including friction material formulation." JSAE Review 21, no. 4 (October 2000): 497–502. http://dx.doi.org/10.1016/s0389-4304(00)00072-2.

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41

Lee, Chih Feng, and Chris Manzie. "Active Brake Judder Attenuation Using an Electromechanical Brake-by-Wire System." IEEE/ASME Transactions on Mechatronics 21, no. 6 (December 2016): 2964–76. http://dx.doi.org/10.1109/tmech.2016.2571318.

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Daly, Scott, Ning Xu, James Crenshaw, and Vikrant J. Zunjarrao. "A Psychophysical Study Exploring Judder Using Fundamental Signals and Complex Imagery." SMPTE Motion Imaging Journal 124, no. 7 (October 2015): 62–70. http://dx.doi.org/10.5594/j18616.

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Gkinis, Theofilos, Ramin Rahmani, and Homer Rahnejat. "Integrated Thermal and Dynamic Analysis of Dry Automotive Clutch Linings." Applied Sciences 9, no. 20 (October 12, 2019): 4287. http://dx.doi.org/10.3390/app9204287.

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Abstract:

Optimum operation of clutch systems is dictated by their dynamic as well as thermal performance. Both of these aspects are closely related to the interfacial frictional characteristics of the clutch lining material, which also affects the noise, vibration and harshness response of the entire vehicular powertrain system. Severe operating conditions such as interfacial clutch slip and increased contact pressures occur during clutch engagement, leading to generation of contact heat, and higher clutch system temperature. Therefore, any undesired oscillatory responses, generated during clutch engagement, such as take-up judder phenomenon can exacerbate generated heat due to stick-slip motion. The paper presents an integrated thermal, and 9-DOF dynamic model of a rear wheel drive light truck powertrain system. The model also includes experimentally measured clutch lining frictional variations with interfacial slip speed, non-linear contact pressure profile and generated surface flash temperature. It is shown that severe torsional oscillations known as take-up judder lead to an increased overall clutch temperature. It also shows that ageing of clutch lining material alters its dynamic and thermal performance.

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Naus, G. J. L., M. A. Beenakkers, R. G. M. Huisman, M. J. G. van de Molengraft, and M. Steinbuch. "Robust control of a clutch system to prevent judder-induced driveline oscillations." Vehicle System Dynamics 48, no. 11 (November 2010): 1379–94. http://dx.doi.org/10.1080/00423110903540744.

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Zhang, Jinle, Biao Ma, and Manfred Zehn. "Study on clutch engagement judder during launch process for dual clutch transmissions." International Journal of Vehicle Noise and Vibration 6, no. 2/3/4 (2010): 176. http://dx.doi.org/10.1504/ijvnv.2010.036685.

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Häfele, Jan, and Ferit Küçükay. "Multi-body dynamics analysis of power train judder oscillations considering aggregate dynamics." International Journal of Vehicle Noise and Vibration 10, no. 1/2 (2014): 64. http://dx.doi.org/10.1504/ijvnv.2014.059630.

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INOUE, Mitsuhiro. "Studies on friction materials of automobiles. 2nd report Judder of clutch facing." Transactions of the Japan Society of Mechanical Engineers Series C 52, no. 482 (1986): 2723–31. http://dx.doi.org/10.1299/kikaic.52.2723.

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Chang, Y. K., and J. R. Hwang. "Numerical model for prediction of brake judder due to wear and rust." International Journal of Automotive Technology 14, no. 3 (May 30, 2013): 375–84. http://dx.doi.org/10.1007/s12239-013-0041-z.

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Kume, Koki, Takashi Nakae, Takahiro Ryu, and Mituo Iwamoto. "Fundamental study on Hot Judder of the automotive disc brake with the time delay." Proceedings of the Transportation and Logistics Conference 2016.25 (2016): 1213. http://dx.doi.org/10.1299/jsmetld.2016.25.1213.

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Li, Tse-Chang, Yu-Wen Huang, and Jen-Fin Lin. "Studies on centrifugal clutch judder behavior and the design of frictional lining materials." Mechanical Systems and Signal Processing 66-67 (January 2016): 811–28. http://dx.doi.org/10.1016/j.ymssp.2015.06.010.

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