Relevant bibliographies by topics / Bump Steer

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Conference papers

Academic literature on the topic 'Bump Steer'

Author: Grafiati
Published: 28 June 2021
Last updated: 13 February 2022

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Journal articles on the topic "Bump Steer"

1

Hoyle, J. "Bump steer effects in a 10 ton truck with a leaf-spring suspension." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 221, no. 9 (September 1, 2007): 1051–69. http://dx.doi.org/10.1243/09544070jauto180.

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A 10 t truck with a leaf-spring suspension and beam axles was known to have suffered an incident during normal road operation that was believed to have been related to the phenomenon of bump steer. Experimental investigations using a four-post rig established that the vehicle was particularly excited while traversing, at approximately 25 m/s, a sinusoidal undulating road profile that had a wavelength of approximately 12 m. Bump steer was evident under these conditions, and the excited frequency of approximately 2.4 Hz raised the possibility that driver reaction times (a lag of approximately 0.2 s) could have compounded the problem when trying to counter the effect of the bump steer. A handling model of the vehicle has been used to investigate the bump steer effects. A three-degree-of-freedom handling model of the vehicle was created that included a non-linear tyre model, which was able to simulate the differing cornering stiffness effects created by varying tyre loads, friction limits, and slip angles. A driver model was created that made use of lateral displacement and intended vehicle-path return rate feedback loops (effectively proportional and differential feedback) but incorporated a neuromuscular lag element and steer rate and steer angle limiting functions. Simulations of violent high-speed double-lane-change manoeuvres enabled the driver's return rate and lateral displacement feedback gains to be benchmarked for these conditions. Further simulations using these feedback gains showed that, when coupled with the bump steer of the vehicle at an excitation frequency of 2.4 Hz, a typical neuromuscular lag of 0.2 s created an approximately 150° out-of-phase response from the driver that resulted in an unstable oscillatory handling system. If the neuromuscular lag was reduced to near-zero, the system remained stable in spite of the high feedback gains. Alternatively, reducing the driver's feedback gains by 50 per cent also resulted in a stable system, in spite of the neuromuscular lag, thereby demonstrating that the correct response to the bump steer effects was not to respond to them. Actual vehicle trials conducted under controlled conditions at various road locations (including the incident location) and other test centres demonstrated that this was indeed the correct response should bump steer be encountered.
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Norman, K. D. "Multiple-bump roadholding test: Description and metric interpretation." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 216, no. 4 (April 1, 2002): 251–58. http://dx.doi.org/10.1243/0954407021529084.

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Road vehicle roadholding comprehends directional response to road inputs. This response is primarily a function of the roadway's frequency content and amplitude and the vehicle's inertial, suspension and tyre characteristics. There is also evidence that suspension kinematic and compliance steer properties can have a significant contribution (Rill, G. Steady state cornering on uneven roadways. SAE paper 860575, 1986). The multiple-bump roadholding test measures vehicle response to a periodic bump of varying frequency while cornering. By driving a vehicle at different speeds over a set of periodic bumps placed on circles of different diameters, it is possible to observe the response to different fundamental bump excitation frequencies at a particular lateral acceleration. This paper describes the test procedure, measured vehicle responses and the metrics calculated.
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Simionescu, P. A., D. Beale, and I. Talpasanu. "Dynamic effect of the bump steer in a wheeled tractor." Mechanism and Machine Theory 42, no. 10 (October 2007): 1352–61. http://dx.doi.org/10.1016/j.mechmachtheory.2006.10.007.

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Gula, Jonathan, M. Jeroen Molemaker, and James C. McWilliams. "Gulf Stream Dynamics along the Southeastern U.S. Seaboard." Journal of Physical Oceanography 45, no. 3 (March 2015): 690–715. http://dx.doi.org/10.1175/jpo-d-14-0154.1.

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AbstractThe Gulf Stream strongly interacts with the topography along the southeastern U.S. seaboard, between the Straits of Florida and Cape Hatteras. The dynamics of the Gulf Stream in this region is investigated with a set of realistic, very high-resolution simulations using the Regional Ocean Modeling System (ROMS). The mean path is strongly influenced by the topography and in particular the Charleston Bump. There are significant local pressure anomalies and topographic form stresses exerted by the bump that retard the mean flow and steer the mean current pathway seaward. The topography provides, through bottom pressure torque, the positive input of barotropic vorticity necessary to balance the meridional transport of fluid and close the gyre-scale vorticity balance. The effect of the topography on the development of meanders and eddies is studied by computing energy budgets of the eddies and the mean flow. The baroclinic instability is stabilized by the slope everywhere except past the bump. The flow is barotropically unstable, and kinetic energy is converted from the mean flow to the eddies following the Straits of Florida and at the bump with regions of eddy-to-mean conversion in between. There is eddy growth by Reynolds stress and downstream development of the eddies. Interaction of the flow with the topography acts as an external forcing process to localize these oceanic storm tracks. Associated time-averaged eddy fluxes are essential to maintain and reshape the mean current. The pattern of eddy fluxes is interpreted in terms of eddy life cycle, eddy fluxes being directed downgradient in eddy growth regions and upgradient in eddy decay regions.
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Borisenko, Vladislav, Artem Kiselev, Luis Leoro, Aleksei Borovkov, and Yury Boldyrev. "K&C suspension parameters stability by production tolerances." E3S Web of Conferences 140 (2019): 07007. http://dx.doi.org/10.1051/e3sconf/201914007007.

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This paper considers a modern approach of K&C parameters stability analysis using the suspension MBS model of a short-wheelbase electric vehicle. According to the results of the work, even minor errors in suspension hardpoints positioning when overlaying can greatly affect the K&C parameters of car suspensions. Using MBS models, quasi-static K&C events have been simulated. In the same way the dependences of the suspension K&C parameters are numerically determined. Moreover, these calculations were made with different hardpoints positions for joints of wishbones fastening on a frame, and joint of a steering rod with a steering rack. The influence of suspension hardpoints displacement on the K&C parameters of the vehicle was estimated. As a result, recommendations are made for production positioning tolerances of suspension hardpoints in order to avoid deterioration of K&C parameters. Basically, the appearance of inaccuracies in the positioning of hardpoints leads to critical changes in anti-dive, anti-lift, kingpin inclination angle, bump camber and bump steer parameters.
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Aicken, Michael D. "Bum steer." BMJ 334, no. 7588 (February 8, 2007): 302. http://dx.doi.org/10.1136/bmj.39098.373912.be.

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Glemža, Justinas, Vilius Palenskis, Andrejus Geižutis, Bronislovas Čechavičius, Renata Butkutė, Sandra Pralgauskaitė, and Jonas Matukas. "Low-Frequency Noise Investigation of 1.09 μm GaAsBi Laser Diodes." Materials 12, no. 4 (February 24, 2019): 673. http://dx.doi.org/10.3390/ma12040673.

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GaAsBi is a suitable and very attractive material system to be used as an active layer in laser diodes (LDs). To understand the performance and the reliability of such devices and also for further laser diode improvements, the origin of noise sources should be clarified. A detailed study of near-infrared 1.09 μm wavelength GaAsBi type-I laser diodes using the low-frequency noise spectroscopy in a temperature range of (180–300) K is presented. Different types of voltage fluctuation spectral density dependencies on the forward current far below the lasing threshold have been observed. According to this, investigated samples have been classified into two groups and two equivalent noise circuits with the corresponding voltage noise sources are presented. Calculations on the voltage spectral density of the electrical noise and current-voltage characteristic approximations have been performed and the results are consistent with the experimental data. The analysis showed that one group of LDs is characterized by 1/fα-type electrical fluctuations with one steep electrical bump in the electrical noise dependence on forward current, and the origin of these fluctuations is the surface leakage channel. The LDs of the other group have two bumps in the electrical noise dependence on current where the first bump is determined by overall LD defectiveness and the second bump by Bi-related defects in the active area of LD with characteristic Lorentzian-type fluctuations having the activation energy of (0.16–0.18) eV.
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Duan, Wen Bo, Hai Peng Geng, Bai Song Yang, Yan Hua Sun, and Lie Yu. "Numerical and Experimental Investigation of Bump Foil Forming Process for Foil Air Bearings." Advanced Materials Research 204-210 (February 2011): 2103–8. http://dx.doi.org/10.4028/www.scientific.net/amr.204-210.2103.

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In this paper, a simplified nonlinear finite element for bump foil forming process of foil air bearings is developed. The bump foil is dealt with as flexible deformable body, the upper die and lower die are considered as the rigid body without deformation. The friction model between bump foil and dies with velocity-dependent friction forces is described by arctan function. The forming process of SS304 Stainless Steel bump foil under different loads is investigated with rigid-plastic finite element method. The simulation results are compared with theoretical values and experimental results. Therefore more feasible process parameters are obtained to fabricate the bump foils.
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Decleir, Marjorie, Ilse De Looze, Médéric Boquien, Maarten Baes, Sam Verstocken, Daniela Calzetti, Laure Ciesla, et al. "Revealing the dust attenuation properties on resolved scales in NGC 628 with SWIFT UVOT data." Monthly Notices of the Royal Astronomical Society 486, no. 1 (March 19, 2019): 743–67. http://dx.doi.org/10.1093/mnras/stz805.

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ABSTRACT Understanding how dust attenuation laws vary between and within galaxies is a key question if we want to reliably measure the physical properties of galaxies at both global and local scales. To shed new light on this question, we present a detailed study of the slope and bump strength of the attenuation law in the nearby spiral galaxy NGC 628 at the resolved spatial scale of 325 pc. To do so, we have modelled a broad multiwavelength data set from the ultraviolet (UV) to the infrared (IR) with the state-of-the-art SED fitting code cigale, including SWIFT UVOT data for which we have developed a new optimized reduction pipeline. We find that the median dust attenuation curve of NGC 628 is fairly steep, but not as steep as the SMC curve, and has a sub-MW-type UV bump. We observe intriguing variations within the galaxy, with regions of high AV exhibiting a shallower attenuation curve. We argue that the flattening of the curve is due to a dominance of absorption over scattering events at higher AV. No trend between the bump strength and the IRAC 8.0 $\mu$m emission was found. However, this does not necessarily rule out polycyclic aromatic hydrocarbons as the main contributors to the UV bump.
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Yang, Peiran, Jinlei Cui, Motohiro Kaneta, and Hiroshi Nishikawa. "Influence of a Surface Bump or Groove on the Lubricating Performance and Dimple Phenomena in Simple Sliding Point EHL Contacts." Journal of Tribology 126, no. 3 (June 28, 2004): 466–72. http://dx.doi.org/10.1115/1.1691434.

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The influence of a transversely or longitudinally oriented surface bump or groove on the lubricating performance and dimple phenomena in the simple sliding point contact composed of a steel ball and a glass disk has been investigated theoretically with numerical solution of the thermal elastohydrodynamic lubrication (EHL) and experimentally with optical interferometry technique. Good agreement has been obtained between the theoretical and experimental results. It has also been discovered that the surface bump or groove is dangerously harmful to the lubricating performance and has a significant influence on the dimple phenomena.
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Dissertations / Theses on the topic "Bump Steer"

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Hrudík, Jan. "Přední náprava vysokovýkonného sportovního vozu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-443475.

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Tato diplomová práce byla psána při studentské zahraniční stáži, pod záštitou Evropské Unie – program „ERASMUS Student Mobility for Placement“. Stáž byla absolvována mezi prosincem 2010 a květnem 2011 ve společnosti a.d.Tramontana, mající sídlo v Palau de Santa Eulália, Španělsko. Pro kompletní návrh podvozku a odpružení jakéhokoli vozidla je nezbytná znalost mnoha technických disciplín. Tato diplomová práce se zabývá dvěma z nich – odpružení a řízení. Nejprve je rozebrána teorie, na kterou se může navázat v praktické části práce. Velká pozornost byla věnována srozumitelnosti textu a názornosti obrázků, bez zbytečných detailů, avšak bez vynechání důležitého. Tuto práci je tedy možné užít jako prvního kroku před návrhem podvozku. V další části je popsáno, jak byla probraná teorie využita při návrhu řízení u skutečného vozu, přičemž největší pozornost je věnována Ackermannově teorii řízení a geometrii zabraňující samořízení při propružení. V závěrečných částech je pozornost věnována ukázce některých z každodenních činností v malosériové výrobě automobilů – jde o zjištění maximálně možného pohybu kola při propružení a proces výroby příčných trojúhelníkových ramen včetně návrhu jejich připevnění k šasi.
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Books on the topic "Bump Steer"

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Pickard, Nancy. Bum steer: A Jenny Cain mystery. New York: Pocket Books, 1990.

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Pickard, Nancy. Bum steer: A Jenny Cain mystery. Thorndike, Me: Thorndike Press, 1990.

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Trimble, Marshall. Never give a heifer a bum steer. Phoenix, AZ: Arizona Highways, 1999.

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Nursahid, Fajar. Tanggung jawab sosial BUMN: Analisis terhadap model kedermawanan sosial PT Krakatau Steel, PT Pertamina, dan PT Telekomunikasi Indonesia. [Jakarta]: Ford Foundation, 2006.

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Compute's Guide to Nintendo Games. Greensboro, USA: Compute Books, 1989.

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Sepowski, Stephen J., ed. The Ultimate Hint Book. Old Saybrook, CT: The Ultimate Game Club Ltd., 1991.

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Inc, Game Counselor. Game Counselor's Answer Book for Nintendo Players. Redmond, USA: Microsoft Pr, 1991.

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Pickard. BUM STEER. Pocket, 2007.

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Pickard, Nancy. Bum Steer. Chivers Audio Books, 1998.

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Bum Steer. Pocket, 1991.

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Conference papers on the topic "Bump Steer"

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Suh, Kwon-Hee, Yoon-Ki Lee, and Hi-Seak Yoon. "Optimization of Front Bump Steer Using Design of Experiments." In SAE 2000 Automotive Dynamics & Stability Conference. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2000. http://dx.doi.org/10.4271/2000-01-1617.

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Kulkarni, Upendra, Monish M. H. Gowda, and Hima Kiran Venna. "Effect of Tie Rod Length Variation on Bump Steer." In International Mobility Conference. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2016. http://dx.doi.org/10.4271/2016-28-0201.

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Chopra, Nitin, and Mahadevan P. "Bump Steer and Brake Steer Optimization in Steering Linkages Through TAGUCHI Method DOE Analysis." In Symposium on International Automotive Technology. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2021. http://dx.doi.org/10.4271/2021-26-0079.

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Upadhyay, Vinay A., K. Gopalakrishna, and Ajay R. Kshirsagar. "A Simple, Cost Effective, Method of Evaluating Bump Steer and Brake Steer, and Achieving Correlation with ADAMS Analysis." In SAE World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2008. http://dx.doi.org/10.4271/2008-01-0227.

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Chicuta, Walace T. "Validation of 2D Mathematical Model Applied to Reach The Zero Bump Steer." In 23rd SAE Brasil International Congress and Display. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2014. http://dx.doi.org/10.4271/2014-36-0360.

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Thompson, Kimberly A., Adam C. Sokolow, Juliana Ivancik, Timothy G. Zhang, William H. Mermagen, and Sikhanda S. Satapathy. "A Sensitivity Study of the Porcine Head Subjected to Bump Impact." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-68178.

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Understanding load transfer to the human brain is a complex problem that has been a key subject of recent investigations [4–6]. Because the porcine is a gyrencephalic species, having greater structural and functional similarities to the human brain than other lower species outlined in the literature, it is commonly chosen as a surrogate for human brain studies [7]. Consequently, we have chosen to use a porcine model in this work. To understand stress wave transfer to and through the brain, it is important to fully characterize the nature of the impact (i.e. source, location, and speed) as well as the response of the constituent tissues under such impact. We suspect the material and topology of these tissues play an important role in their response. In this paper, we report on a numerical study assessing the sensitivity of model parameters for a 6-month old Gottingen mini-pig model, under bump loading. In this study, 2D models are used for computational simplicity. While a 3D model is more realistic in nature, a 2D representation is still valuable in that it can provide trends on parameter sensitivity that can help steer the development of the 3D model. In this work, we investigate the variation of skull and skin thickness, evaluate material variability of the skull, and consider the effects of nasal cavities on load transfer. Eighty simulations are computed in LS-DYNA and analyzed in MATLAB. The results of this study will provide useful knowledge on the necessary components and parameters of the porcine model and therefore provide more confidence in the analysis. This is an essential first step as we look toward bridging the gap between correlates of injury in animal and human models.
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Mohan, Ganesh, Claude Rouelle, and Emmanuel Hugon. "A New Method to Evaluate Bump Steer and Steering Influence on Kinematic Roll and Pitch Axes for All Independent Suspension Types." In Motorsports Engineering Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2008. http://dx.doi.org/10.4271/2008-01-2949.

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Yeh, Sheng-Kai, and Weileun Fang. "Integration of Stainless-Steel Tactile Bump with Inductive Tactile Sensor Array for 3D Micro Joystick Button Application." In 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII). IEEE, 2019. http://dx.doi.org/10.1109/transducers.2019.8808306.

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Koo, Bonguk, Zhaoyuan Wang, Jianming Yang, Donghoon Kang, and Frederick Stern. "Impulsive Plunging Wave Breaking Downstream of a Bump in a Shallow Water Flume." In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30092.

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The plunging wave-breaking process for impulsive flow over a bump in a shallow water flume is described using complementary experiments and simulations, which is relevant to ship hydrodynamics since it includes effect of wave-body interactions and wave breaking direction is opposite to the mean flow. Phase averaged measurements (relative to the time at which the maximum wave height is reached just before the first plunge) are conducted, including the overall flume flow and 2D PIV center-plane velocities and turbulence inside the plunging breaking wave and bottom pressures under the breaking wave. A total number of 226 individual plunging wave-breaking tests were conducted, which all followed a similar time line consisting of startup, steep wave formation, plunging wave, and chaotic wave breaking swept downstream time phases. The plunging wave breaking process consists of four repeated plunging events each with three [jet impact (plunge), oblique splash and vertical jet] sub-events, which were identified first using complementary CFD. Video images with red dye display the plunging wave breaking events and sub-events. The first and second plunges take longer than the last two plunges. Oblique splashes and vertical jets account for more time than plunging. The wave profile at maximum height, first plunge, bump and wave breaking vortex and entrapped air bubble trajectories, entrapped air bubble diameters, kinetic, potential, and total energy, and bottom pressures are analyzed. The simulations on four different grids qualitatively predict all four time phases, all four plunging events and their sub-events, and bottom pressure but with reduced velocity magnitudes and larger post-breaking water elevations. The medium grid results are presented and the fine grid simulations are in progress. Similarities and differences are discussed with the previous deep water or sloping beaches experimental and computational studies.
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Rieken, Markus, Marcel Mahner, and Bernhard Schweizer. "Thermal Optimization of Air Foil Thrust Bearings Using Different Foil Materials." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91207.

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Abstract Air foil bearings are used in turbomachinery applications with high speeds and in oil-free environments. Their numerical analysis has to account for the multiphysicality of the problem. This work features a detailed thermo-elasto-hydrodynamic model of an air foil thrust bearing with bump-type foil-structure. The bearing geometry is designed to produce a high load capacity while maintaining thermally stable conditions. The presented model considers foil deformations using a Reissner-Mindlin-type shell theory. Dry friction (stick-slip approach) between the top foil, the bump foil and the base plate is taken into account in the model. Reynolds equation from lubrication theory is used to study the hydrodynamic behavior of the air film. A thermal model of the lubricating gap, the foil sandwich and the rotor disk including heat fluxes into the rotor and the periphery as well as a cooling flow on the backside of the rotor disk are presented. Elastic deformations of the rotor disk due to centrifugal effects are calculated; deformations caused by temperature gradients are investigated as well. In air foil thrust bearings, very high temperatures are often observed and a forced cooling flow through the foil sandwich has to be applied. Using a cooling flow by applying a pressure difference between the inner and outer radius of the thrust bearing has several drawbacks: the additional cooling flow reduces the overall efficiency of the machine and requires additional constructive measures. In this work, a passive cooling concept is analyzed, where the typical steel foils are replaced with other materials, which have a significantly higher thermal conductivity. The simulation results show that the bearing temperatures can be reduced markedly (up to 70°C in the considered test case) by this approach.
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