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Готові списки джерел за темами / Friction modulation

Добірка наукової літератури з теми "Friction modulation"

Автор: Grafiati

Опубліковано: 22 травня 2022

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Статті в журналах з теми "Friction modulation":

1

Gueorguiev, David, Eric Vezzoli, André Mouraux, Betty Lemaire-Semail, and Jean-Louis Thonnard. "The tactile perception of transient changes in friction." Journal of The Royal Society Interface 14, no. 137 (December 2017): 20170641. http://dx.doi.org/10.1098/rsif.2017.0641.

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Анотація:

When we touch an object or explore a texture, frictional strains are induced by the tactile interactions with the surface of the object. Little is known about how these interactions are perceived, although it becomes crucial for the nascent industry of interactive displays with haptic feedback (e.g. smartphones and tablets) where tactile feedback based on friction modulation is particularly relevant. To investigate the human perception of frictional strains, we mounted a high-fidelity friction modulating ultrasonic device on a robotic platform performing controlled rubbing of the fingertip and asked participants to detect induced decreases of friction during a forced-choice task. The ability to perceive the changes in friction was found to follow Weber's Law of just noticeable differences, as it consistently depended on the ratio between the reduction in tangential force and the pre-stimulation tangential force. The Weber fraction was 0.11 in all conditions demonstrating a very high sensitivity to transient changes in friction. Humid fingers experienced less friction reduction than drier ones for the same intensity of ultrasonic vibration but the Weber fraction for detecting changes in friction was not influenced by the humidity of the skin.

2

Karuppiah, K. S. Kanaga, Yibo Zhou, L. Keith Woo, and Sriram Sundararajan. "Nanoscale Friction Switches: Friction Modulation of Monomolecular Assemblies Using External Electric Fields." Langmuir 25, no. 20 (October 20, 2009): 12114–19. http://dx.doi.org/10.1021/la901221g.

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3

Yeung, Chi Shing, Yang Yang, Hanheng Du, Jianjian Wang, and Ping Guo. "Friction reduction performance of microstructured surfaces generated by nonresonant modulation cutting." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 12 (August 27, 2018): 4120–27. http://dx.doi.org/10.1177/0954406218796033.

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Microstructured surfaces can reduce friction force between two contact pairs in relative motion under hydrodynamic contact. In this study, we evaluate the friction reduction performance of microdimpled surfaces with different cross-sectional profiles generated by nonresonant modulation cutting. Computational fluid dynamics simulation was conducted to simulate the friction reduction effect between surfaces with lubricants. An elliptical modulation texturing method is introduced based on a two-dimensional nonresonant vibration tool, which could generate adjustable high-frequency elliptical tool trajectories. Different dimpled surfaces were generated using three types of tool trajectories. Their influence on the friction reduction and load-carrying capacity were experimentally studied and evaluated by comparing the simulation and experimental results.

4

Khamis, Heba, Hafiz Malik Naqash Afzal, Jennifer Sanchez, Richard Vickery, Michaël Wiertlewski, Stephen J. Redmond, and Ingvars Birznieks. "Friction sensing mechanisms for perception and motor control: passive touch without sliding may not provide perceivable frictional information." Journal of Neurophysiology 125, no. 3 (March 1, 2021): 809–23. http://dx.doi.org/10.1152/jn.00504.2020.

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This study contributes to understanding how frictional information is obtained and used by the brain. When the skin is contacting surfaces of identical topography but varying frictional properties, the deformation pattern is different; however, available sensory cues did not get translated into perception of frictional properties unless a sufficiently large lateral movement was present. These neurophysiological findings may inform how to design and operate haptic devices relying on friction modulation principles.

5

Agarwal, Sandeep. "Structural Morphing using Piezoelectric Modulation of Joint Friction." Journal of Intelligent Material Systems and Structures 18, no. 4 (December 13, 2006): 389–407. http://dx.doi.org/10.1177/1045389x06066529.

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6

Liu, Xiaofei, Yao Li, and Wanlin Guo. "Friction Modulation via Photoexcitation in Two-Dimensional Materials." ACS Applied Materials & Interfaces 12, no. 2 (December 19, 2019): 2910–15. http://dx.doi.org/10.1021/acsami.9b20285.

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7

Wiertlewski, Michael, and J. Edward Colgate. "Power Optimization of Ultrasonic Friction-Modulation Tactile Interfaces." IEEE Transactions on Haptics 8, no. 1 (January 1, 2015): 43–53. http://dx.doi.org/10.1109/toh.2014.2362518.

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8

Choi, Jae Hyeok, Su Kyeong Kwan, Hui Eun Ko, Jeong Hyun Park, Dong Keun Kim, Hai Woong Park, and Arnaud Caron. "Effect of Normal Contact Vibration on Nano-Scale Friction." Lubricants 7, no. 11 (November 7, 2019): 99. http://dx.doi.org/10.3390/lubricants7110099.

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In this work, we investigate the effect of contact vibration on the friction of sliding single asperity contacts of different adhesion strength over a wide range of load and vibration amplitude. We convert the amplitude of vibration to its equivalent modulation force and tip-oscillation velocity. We observe a logarithmic relationship between friction and the ratio of the modulation force to the normal force and between friction and the ratio of sliding velocity to the tip-oscillation velocity. We discuss these logarithmic dependencies based on an induced corrugation of the tip-sample interaction potential.

9

Li, Qiang, In Ho Cho, Rana Biswas, and Jaeyoun Kim. "Nanoscale Modulation of Friction and Triboelectrification via Surface Nanotexturing." Nano Letters 19, no. 2 (January 14, 2019): 850–56. http://dx.doi.org/10.1021/acs.nanolett.8b04038.

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10

van Spengen, W. M., G. H. C. J. Wijts, V. Turq, and J. W. M. Frenken. "Microscale Friction Reduction by Normal Force Modulation in MEMS." Journal of Adhesion Science and Technology 24, no. 15-16 (January 2010): 2669–80. http://dx.doi.org/10.1163/016942410x508226.

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Більше джерел

Дисертації з теми "Friction modulation":

1

Rathbun, David. "Pulse modulation control for flexible systems under the influence of nonlinear friction /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/6097.

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2

Kalantari, Farzan. "Haptic feedback displays with programmable friction : interaction and texture perception." Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1I031/document.

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Les interactions tactiles avec les écrans tactiles tels que les smartphones et les tablettes sont devenues de plus en plus omniprésentes dans notre vie quotidienne. Ces dispositifs tactiles commerciaux fournissent rarement un retour haptique convaincant aux doigts humains malgré l'utilisation du toucher comme entrée principale; le retour haptique est généralement limité à la vibration. Par conséquent, différentes technologies ont été explorées pour générer un retour haptique dynamique afin d'améliorer la saisie sur les appareils à écran tactile. Dans cette thèse, nous nous intéressons plus particulièrement à une catégorie de retour haptique qui exploite les vibrations ultrasoniques pour créer un film d'air entre le doigt d'un utilisateur et l'écran pour réduire la friction lorsqu'il est activé, ce phénomène est appelé effet squeeze film. En effet, la perception tactile de l'utilisateur joue un rôle crucial dans l'interaction avec les dispositifs haptiques. Dans cette thèse, nous explorons d'abord la limitation de la perception tactile des doigts de l'utilisateur sur les écrans tactiles haptiques ultrasoniques pour des explorations tactiles à un doigt et à plusieurs doigts au moyen d'expériences psychophysiques. Nous proposons ensuite un nouveau concept, appelé taxel, concernant la perception par l'utilisateur des éléments tactiles sur les écrans tactiles haptiques à ultrasons. En outre, nous décrivons comment optimiser les performances d'interaction de l'utilisateur dans des tâches d'interaction communes en utilisant les vibrations ultrasoniques. Enfin, nous étudions comment le signal tactile peut être combiné avec des signaux auditifs pour améliorer la perception de l'utilisateur dans les interactions musicales
Touch interactions with tactile displays such as smart-phones and tablets, have become more and more ubiquitous in our daily life. These commercial touchscreen devices rarely provide a compelling haptic feedback to human fingers despite the use of touch as primary input; haptic feedback is typically limited to vibration. Therefore, different technologies have been explored to generate dynamic haptic feedback to enhance input on touchscreen devices. In this dissertation, we are are particularly interested in a category of haptic feedback which leverages ultrasonic vibrations to create an air-gap between a user's finger and the display to reduce friction when activated, a phenomenon called the squeeze film effect. Indeed, user's tactile perception plays a crucial role for interacting with haptic displays. In this thesis, we first explore user's fingers limitation of tactile perception on ultrasonic haptic displays for both one-finger and multi-finger touch explorations by means of psychophysical experiments. We then propose a novel concept, called taxel concerning user's perception of tactile elements on ultrasonic haptic touchscreens. Furthermore, we describe how to optimize user's interaction performances in common interaction tasks by leveraging ultrasonic lubrication. Finally, we study how tactile signal can be combined with auditory signals to enhance user's perception in musical interactions

3

Memari, Sahel. "Ajustements posturaux consécutifs lors d’un pas simple : effets de la vitesse et du frottement." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA113011/document.

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Cette étude avait pour objectif premier une caractérisation biomécanique du simple pas chez le sujet « normal ». À cet effet, on a considéré l’effet de la vitesse, ce qui a notamment permis de tester l’invariance de l’égalité entre la perturbation appliquée au corps lors de son accélération et la contre-perturbation lors de son freinage (CPA) permettant le retour au repos. Ainsi , le rôle des CPA se trouve explicité. Dans une seconde série expérimentale, on a considéré l’effet du frottement à l’arrêt du mouvement. L’objet de cette série était de caractériser la modification des caractéristiques biomécaniques chez le sujet « normal ». La caractérisation n’a pas soulevé de problèmes majeurs, l’effet de la vitesse se confirmant pour les deux coefficients de frottement (COF) considérés ( Téflon et Carrelage ). En revanche, les différences entre caractéristiques biomécaniques paraissent ne pas être significatives quand le COF diffère. Néanmoins, si l’on considère les résultats individuels, on constate que la durée des CPA tend à être systématiquement supérieure pour le COF le plus faible (Téflon), alors que le pic d’amplitude est systématiquement inférieur . Ces résultats incitent à approfondir l’étude de l’effet du frottement sur le simple pas. En conclusion , le simple pas semble être un paradigme permettant d’obtenir des résultats robustes et facilement utilisables pour étudier des personnes vieillissantes ou handicapées
This study aimed to biomechanical characterization of a simple step among normal subjects. To this end, we considered the effect of speed, which has enabled to test the invariance of equality between the disturbance applied to the body during its acceleration and counter- perturbation during its breaking phase (CPA) to return to initial position. Also, the role of CPA is explained.In a second experimental series, we considered the effect of friction at the stop point of movement .The purpose of this series was to characterization of biomechanical characteristics modifications among normal subjects. So, the characterization did not raise any major problems, the effects of velocity is confirmed for both COF considered (Teflon and Tiles). How ever, the differences between biomechanical characteristics are not significant when the COF is different, but by considering the individual results, we have found that the duration of the CPA tends to be systematically higher for Teflon, contrary to the peak amplitude results.These results encourage further study of the effect of friction on the single step.In conclusion, the simple step seems to be a paradigm for obtaining robust results and easily usable to study old or handicapped peoples

4

Torres, Guzman Diana Angélica. "Generation and control of tactile feedback with longitudinal ultrasonic vibration and human-in-the-Loop analysis." Thesis, Université de Lille (2018-2021), 2021. http://www.theses.fr/2021LILUN035.

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La technologie haptique offre aux utilisateurs un moyen unique d'interagir avec les mondes virtuels en permettant le transfert direct d'informations entre les interfaces et l'être humain par le biais du sens du toucher. Les dispositifs haptiques de surface utilisent différentes techniques pour moduler la friction afin de simuler la texture. Dans le cas des surfaces haptiques à ultrasons, on utilise des céramiques piézoélectriques qui, alimentées par une tension alternative sinusoïdale, provoquent un mouvement à la surface du dispositif. Ce mouvement est transmis et amplifié par le matériau, à sa fréquence de résonance.Les modes vibratoires transversaux sont couramment utilisés dans la technologie haptique des surfaces ultrasoniques. Ce travail évalue la possibilité d'utiliser les vibrations longitudinales comme une alternative technologique pour produire un retour haptique dans les dispositifs à ultrasons. Pour cela, des comparaisons sont effectuées sur les deux familles de modes, à partir d’un dispositif dédié à la fois d’un point de vue performances énergétiques et qualité des stimuli perçus. L'action et la perception de l'homme dans ce contexte sont très importantes. Malheureusement, en raison de la complexité des phénomènes de friction, la réponse sensorielle est différente d'un utilisateur à l'autre, avec le même stimulus haptique. Pour cette raison, il est intéressant d'explorer l'humain dans la boucle de simulation tactile. Dans ce but, une première tentative de développer le concept de "Human-in-the-Loop" en haptique de surface est présentée dans cette thèse, en utilisant le formalisme EMR (Energetic Macroscopic Representation) développé au sein de l'équipe de contrôle du L2EP et déjà couramment appliqué au HIL (Hardware in the Loop).Cette thèse est organisée comme suit : le chapitre 1 présente l'état de l'art et le positionnement. Le chapitre 2 présente la création et le contrôle d'un dispositif haptique de surface à ondes longitudinales. Dans le chapitre 3, le modèle d'interaction à l'origine de l'effet de modulation de la friction avec la vibration longitudinale ultrasonique est proposé et validé pour le cas où l'exploration se fait dans le même axe que le mouvement de l'onde, ainsi que le cas plus général où l'exploration se fait dans toute autre direction. Dans le chapitre 4, une série d'expériences est conçue pour effectuer une analyse comparative entre la vibration ultrasonore longitudinale et transversale, en termes de besoins énergétiques pour une intensité de texture donnée. A partir de cette étude, il est possible de percevoir une problématique importante dans la conception de dispositifs haptiques de surface à ultrasons : l'adaptation du retour haptique à chaque utilisateur pour obtenir une perception standardisée. Le chapitre 5 traite de cette problématique, en introduisant le concept de force acoustique du doigt et sa corrélation avec le phénomène de réduction de la friction. Enfin, le chapitre 6 présente les leçons apprises dans les chapitres précédents dans une perspective "Human-in-the-loop" et explore les applications futures possibles de ce type d'analyse.Ce travail a été réalisé dans le cadre du projet Mint à l'IRCICA. Il fait donc partie de l'équipe collaborative 'CRIStAL-L2EP-MINT, et du groupe CNRS GdR TACT
Haptic technology offers users a unique way of interacting with the virtual world, as it allows direct information transfer between the interfaces and the human through the sense of touch. Surface haptic devices use different techniques to achieve friction modulation in order to simulate texture. In the case of ultrasonic surface haptics, this is achieved with the use of piezoelectric ceramics, which, supplied by a sinusoidal alternating voltage, elicit motion on the surface of the device. This motion is transmitted and amplified by the material, at its resonance frequency.Transversal vibrational modes are commonly used in ultrasonic surface haptic technology. This work evaluates the possibility to use longitudinal vibration as a technological alternative to produce haptic return in ultrasonic devices. Valuable comparisons between transverse and longitudinal modes are performed on a dedicated device, both on the point of view of energetic behavior and stimuli perception quality. The action and perception of the human in this context are very important. Unfortunately, due to the complexity of friction phenomena, the sensory response is different from one user to another, with the same haptic stimulus. For this reason, it is interesting to explore the human in the tactile simulation loop. With this purpose in mind, an initial attempt to develop the concept of "Human-in-the-Loop" in surface haptics is given in this thesis, using the EMR formalism, (Energetic Macroscopic Representation)developed within the L2EP Control team and already commonly applied to HIL (Hardware in the Loop).This PhD thesis is organized as follows: chapter 1 presents the state of the art and the positioning. Chapter 2 presents the creation and control of a longitudinal wave surface haptic device. In Chapter 3, the interaction model at the origin of the friction modulation effect with ultrasonic longitudinal vibration is proposed and validated for the case where the exploration occurs in the same axis as the wave motion, as well as the more general case where the exploration occurs in any other direction. In Chapter 4, a series of experiments are conceived to perform a comparative analysis between longitudinal and transverse ultrasonic vibration, in terms of energetic requirements for a given texture intensity. From this study, it is possible to perceive one important problematic in the design of ultrasonic surface haptic devices: the adaptation of the haptic feedback to each user to achieve a standardized perception. Chapter 5 deals with this problematic, by introducing the concept of acoustic finger force and its correlation with the friction reduction phenomenon. Finally, Chapter 6 presents the lessons learned in the previous chapters in a ‘Human-in-the-loop’ perspective and explores the possible future applications of this type of analysis.This work has been carried out within the framework of the Mint Project at IRCICA. It takes, therefore, part in the collaborative ‘CRIStAL-L2EP-MINT’ team, and CNRS GdR TACT group

Частини книг з теми "Friction modulation":

1

Monnoyer, Jocelyn, Emmanuelle Diaz, Christophe Bourdin, and Michaël Wiertlewski. "Ultrasonic Friction Modulation While Pressing Induces a Tactile Feedback." In Haptics: Perception, Devices, Control, and Applications, 171–79. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42321-0_16.

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2

Sednaoui, Thomas, Eric Vezzoli, David Gueorguiev, Michel Amberg, Cedrick Chappaz, and Betty Lemaire-Semail. "Psychophysical Power Optimization of Friction Modulation for Tactile Interfaces." In Haptics: Perception, Devices, Control, and Applications, 354–62. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-42324-1_35.

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3

Colchero, J., M. Luna, and A. M. Baró. "Modulation Technique for Measuring Friction on a Nanometer Scale." In Micro/Nanotribology and Its Applications, 217–23. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5646-2_13.

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4

Friedel, J. "Solid Friction on Lattice and Spin Modulations." In Low-Dimensional Conductors and Superconductors, 503–19. Boston, MA: Springer US, 1987. http://dx.doi.org/10.1007/978-1-4899-3611-0_39.

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5

van Spengen, W., G. Wijts, V. Turq, and J. Frenken. "Microscale Friction Reduction by Normal Force Modulation in MEMS." In Adhesion Aspects in MEMS/NEMS, 339–50. CRC Press, 2011. http://dx.doi.org/10.1201/b12181-24.

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Тези доповідей конференцій з теми "Friction modulation":

1

Meyer, D. J., M. A. Peshkin, and J. E. Colgate. "Fingertip friction modulation due to electrostatic attraction." In 2013 World Haptics Conference (WHC 2013). IEEE, 2013. http://dx.doi.org/10.1109/whc.2013.6548382.

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2

Hudin, Charles. "Local friction modulation using non-radiating ultrasonic vibrations." In 2017 IEEE World Haptics Conference (WHC). IEEE, 2017. http://dx.doi.org/10.1109/whc.2017.7989850.

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3

Agarwal, Sandeep. "Semi-Active Vibration Damping by Modulation of Joint Friction." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79066.

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Анотація:

The semi-active concept for vibration suppression in a clamped-free structural configuration is investigated. A fixed-free beam with the semi-active joint, designed to modulate friction, and hence the clamping load level, is considered. The vibration of the beam resulting from assumed initial conditions is examined in the time domain for a range of clamping load levels. The results obtained are studied and a control strategy is proposed to dissipate the energy efficiently and in a controlled way.

4

Martel, Carlos, Roque Corral, and Rahul Ivaturi. "Flutter Amplitude Saturation by Nonlinear Friction Forces: Reduced Model Validation." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25462.

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The computation of the final, friction saturated Limit Cycle Oscillation amplitude of an aerodynamically unstable bladeddisk in a realistic configuration is a formidable numerical task. In spite of the large numerical cost and complexity of the simulations, the output of the system is not that complex: it typically consists of an aeroelastically unstable traveling wave (TW), which oscillates at the elastic modal frequency and exhibits a modulation in a much longer time scale. This slow time modulation over the purely elastic oscillation is due to both, the small aerodynamic effects and the small nonlinear friction forces. The correct computation of these two small effects is crucial to determine the final amplitude of the flutter vibration, which basically results from its balance. In this work we apply asymptotic techniques to consistently derive, from a bladed-disk model, a reduced order model that gives only the time evolution on the slow modulation, filtering out the fast elastic oscillation. This reduced model is numerically integrated with very low CPU cost, and we quantitatively compare its results with those from the bladed-disk model. The analysis of the friction saturation of the flutter instability also allows us to conclude: (i) that the final states are always nonlinearly saturated TW, (ii) that, depending on the initial conditions, there are several different nonlinear TWs that can end up being a final state, and (iii) that the possible final TWs are only the more flutter prone ones.

5

Bodas, Prachi, Rebecca Fenton Friesen, Amukta Nayak, Hong Z. Tan, and Roberta Klatzky. "Roughness rendering by sinusoidal friction modulation: Perceived intensity and gradient discrimination*." In 2019 IEEE World Haptics Conference (WHC). IEEE, 2019. http://dx.doi.org/10.1109/whc.2019.8816178.

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6

Martel, C., and R. Corral. "Flutter Amplitude Saturation by Nonlinear Friction Forces: An Asymptotic Approach." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94068.

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The computation of the friction saturated vibratory response of an aerodynamically unstable bladed-disk in a realistic configuration is a formidable numerical task, even for the simplified case of assuming the aerodynamic forces to be linear. The non-linear friction forces effectively couple different traveling waves modes and, in order to properly capture the dynamics of the system, large time simulations are typically required to reach a final, saturated state. Despite of all the above complications, the output of the system (in the friction microslip regime) is not that complex: it typically consists of a superposition of the aeroelastic unstable traveling waves, which oscillate at the elastic modal frequency and exhibit also a modulation in a much longer time scale. This large time modulation over the purely elastic oscillation is due to both, the small aerodynamic effects and the small nonlinear friction forces. The correct computation of these two small effects (small as compared with the elastic forces) is crucial to determine the final amplitude of the flutter vibration, which basically results from its balance. In this work we apply asymptotic techniques to obtain a new simplified model that gives only the slow time dynamics of the amplitudes of the traveling waves, filtering out the fast elastic oscillation. The resulting asymptotic model is very reduced and extremely cheap to simulate, and it has the advantage that it gives precise information about how the nonlinear friction at the fir-tree actually acts in the process of saturation of the vibration amplitude.

7

Moscoso, Wilfredo, Efe Olgun, W. Dale Compton, and Srinivasan Chandrasekar. "Effect of Low-Frequency Modulation on Lubrication of Chip-Tool Interface in Machining." In ASME/STLE 2004 International Joint Tribology Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/trib2004-64310.

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A study has been made of the effect of an externally imposed, low-frequency modulation (≤ 100 Hz) on the action of a fluid in machining. It is shown that in conventional machining, fluid action in terms of lubrication is essentially confined to the edges of chip-tool contact along the tool rake face, with little or no change in the friction condition over much of this face. However, the effectiveness of the lubricating action is significantly enhanced when a controlled low-frequency modulation of sufficient amplitude, such as to break the chip-tool contact, is imposed in the direction of cutting. Measurements show that the friction coefficient between tool and chip is reduced by a factor of up to three in the presence of such a modulation. The extent of the secondary deformation zone in the chip material close to the rake face is also significantly reduced. Direct observations of the tool rake face show that when the modulation is applied, the fluid penetrates into much of the intimate contact region between chip and tool.

8

Kalbfleisch, Paul, Svenja Horn, and Monika Ivantysynova. "Cyclostationary Analysis of Measured Pump Acoustic and Vibration Signals." In BATH/ASME 2018 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fpmc2018-8899.

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The stationary signal assumption is convenient as its signal processing methods are the minimum effort required to characterize periodic signals and therefore the most common. However, signals from rotating machines have been found to naturally be characterized as cyclostationary. The existent of natural phenomenon such as, shaft imbalances, turbulent fluid flows, friction, combustion forces, and torsional vibrations create modulation effects, that can be seen in the measured signals. These observed modulations in pump noise and vibration signals are synonymous to amplitude modulations (AM), frequency modulations (FM), and potentially phase modulations in electrical systems. Having this knowledge, the fluid power noise, vibration, and harshness (NVH) researchers can draw from an enormous amount of progress made in the modern telecommunication signal processing methods of cyclostationary signals. This article introduces the basic concepts of cyclostationary signals, some of their signal processing techniques, and a simple example of analysis for a positive displacement machine through the cyclostationary paradigm.

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Meyer, David J., Michael Wiertlewski, Michael A. Peshkin, and J. Edward Colgate. "Dynamics of ultrasonic and electrostatic friction modulation for rendering texture on haptic surfaces." In 2014 IEEE Haptics Symposium (HAPTICS). IEEE, 2014. http://dx.doi.org/10.1109/haptics.2014.6775434.

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Manhart, Jakob, Andreas Hausberger, Inge Mühlbacher, Raimund Schaller, Armin Holzner, Wolfgang Kern, and Sandra Schlögl. "UV-induced modulation of tribological characteristics: Elastomeric materials featuring controlled anisotropic friction properties." In PROCEEDINGS OF THE REGIONAL CONFERENCE GRAZ 2015 – POLYMER PROCESSING SOCIETY PPS: Conference Papers. Author(s), 2016. http://dx.doi.org/10.1063/1.4965548.

Повний текст джерела

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