Bibliographies thématiques / Chatter suppression

Littérature scientifique sur le sujet « Chatter suppression »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Chatter suppression"

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Zhang, Li Ying, Jin Hui Li et Jun Tao Hu. « The Motional Stability Analysis and Optimal Design of Built-In Chatter Suppression Boring Bar ». Advanced Materials Research 694-697 (mai 2013) : 430–35. http://dx.doi.org/10.4028/www.scientific.net/amr.694-697.430.

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On the basis of the Mechanics and Kinematics analysis of built-in chatter suppression boring bar, the research analyzes the motional stability of built-in chatter suppression boring bar, and uses SIMS vibration absorbers for chatter suppression theory to design the characteristic parameters of vibration absorber; then with MATLAB optimized to get structural material parameters of vibration absorber; finally conduct harmonic response analysis to built two-dimensional model of built-in chatter suppression boring bar by ANSYS, compare and optimize the results to guide the development of built-in chatter suppression boring bar.
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Tarng, Y. S., et T. C. Li. « Detection and Suppression of Drilling Chatter ». Journal of Dynamic Systems, Measurement, and Control 116, no 4 (1 décembre 1994) : 729–34. http://dx.doi.org/10.1115/1.2899272.

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The paper presents a simple but effective method to detect and suppress chatter in drilling operations. Unlike conventional approaches, complex cutting dynamics in drilling operations do not need to model and analyze in this new approach. Chatter is detected when a large thrust force or torque variation is observed. Then, a simple spindle speed change method using the chatter frequency to guide the modification of spindle speed for suppression of chatter is applied. It is shown, by experimental results, that chatter in drilling can be effectively suppressed by using this method.
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Liu, Bo, Changfu Liu, Xinli Yu, Yang Zhou et Daohai Wang. « Prediction, detection, and suppression of regenerative chatter in milling ». Advances in Mechanical Engineering 14, no 10 (octobre 2022) : 168781322211297. http://dx.doi.org/10.1177/16878132221129746.

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In metal cutting processing, especially in the processing of low-rigidity workpieces, chatter is a key factor affecting many aspects such as surface quality, processing efficiency and tool life. The academic research on chatter mainly focuses on three directions: chatter prediction, real-time detecting, and chatter suppression. With the continuous development of machining toward intelligence, the hot spots and trends of chatter research are also constantly changing. Therefore, an in-depth and systematic summary of the current situation of chatter research is urgently needed. On this basis, it is of great significance to realize the prediction of the hot spots and trends of chatter research. This article summarizes the research status from three aspects of chatter prediction, detecting and suppression, and points out the advantages and limitations of current chatter research. After in-depth discussion, this article also looks forward to the trend of chatter research. The hot spots of chatter research will focus on the following points: (1) Chatter research methods and means based on data-driven. (2) Integrated data collection, processing and decision-making methods. (3) Chatter detecting unit and chatter suppression unit are integrated in the smart spindle. (4) The chatter mechanism and detecting research of robot milling.
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Kong, Tian Rong, Zhe He Yao et Zi Chen Chen. « Research on the Boring Chatter Suppression Based on MR Fluid ». Materials Science Forum 532-533 (décembre 2006) : 365–68. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.365.

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Chatter during boring process is one of the main adverse factors influenced on the machining accuracy of precision hole, surface quality and working efficiency. In order to suppress chatter, an innovative controlling means of MR-intelligent-boring-bar with self-chatter-suppression is proposed, which is composed of MR fluid, shell structure, excitation coil and boring bar. The MR fluid’s mechanical characteristic can be adjusted by changing the intensity of magnetic field, thus the system stiffness and damping will be modified, and then the boring chatter can be suppressed. Otherwise, the dynamic model of MR-intelligent-boring-bar with self-chatter-suppression is built. Lastly, the experimental system of MR-intelligent-boring-bar is established, and the experiments of chatter suppression during boring process are performed. The results of experiments show that the new means of chatter suppression is effective.
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Ema, S., et E. Marui. « Suppression of Chatter Vibration in Drilling ». Journal of Manufacturing Science and Engineering 120, no 1 (1 février 1998) : 200–202. http://dx.doi.org/10.1115/1.2830103.

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In this study, from the viewpoint of suppressing chatter vibration in drilling, the effects of cutting conditions on the initiation boundary of chatter vibration were investigated experimentally. Furthermore, the application of an impact damper on drills was attempted to suppress chatter vibrations.
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Yamato, Shuntaro, Toshiki Okuma, Kenichi Nakanishi, Junji Tachibana, Norikazu Suzuki et Yasuhiro Kakinuma. « Chatter Suppression in Parallel Turning Assisted with Tool Swing Motion Provided by Feed System ». International Journal of Automation Technology 13, no 1 (5 janvier 2019) : 80–91. http://dx.doi.org/10.20965/ijat.2019.p0080.

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Parallel turning technology has been attracting attention as an important technology to enhance the productivity of multitasking machine tools. To maximize the productivity advantage of parallel turning, chatter avoidance or suppression is one of the most noteworthy concerns. In this study, a novel chatter suppression technique using tool swing motion is provided by a feed drive system. The optimal design methodology of the tool swing motion for effective chatter suppression is also introduced based on its analogy with the spindle speed variation technique under the shared-surface parallel turning and rigid-tool and flexible-workpiece assumptions. The proposed method was evaluated with regard to the chatter stabilizing performance and workpiece runout as compared to conventional equal pitch turning and unequal pitch turning for chatter suppression. As a result, the proposed tool swing parallel turning exhibited a high chatter stabilizing performance without eccentricity of the workpiece and enhanced surface quality, although particular swing marks were left on the machined surface.
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Inasaki, I., B. Karpuschewski et H. S. Lee. « Grinding Chatter – Origin and Suppression ». CIRP Annals 50, no 2 (2001) : 515–34. http://dx.doi.org/10.1016/s0007-8506(07)62992-8.

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Nakagawa, Heisaburo, Keiji Ogawa, Satoshi Demachi et Hideyasu Hasegawa. « An Experimental Study on Suppression of Chatter Vibration with Different Helix Angles End-Mill ». Key Engineering Materials 407-408 (février 2009) : 37–40. http://dx.doi.org/10.4028/www.scientific.net/kem.407-408.37.

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In this study we attempted to suppress chatter vibration in end-milling of austenitic stainless steels with an end-mill having different helix angles. We showed there were two types of chatter vibration in end-milling with a conventional end-mill with regular helix angle. The two types of chatter vibration depend on the cutting speed. We detected these two types of chatter vibration by the developed monitoring method using laser Doppler vibrometers. We classified the two types of chatter vibration according to chatter generating tendency, frequency and vibration mode. We showed that chatter vibration generated at lower cutting speeds was regenerative chatter vibration. On the other hand, chatter vibration generated at higher cutting speeds was another type. We showed that a end-mill with different helix angles could prevent generative chatter vibration at lower cutting speeds and was also effective in suppressing chatter vibration at higher cutting speeds.
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Yang, F., B. Zhang et J. Yu. « Chatter Suppression via an Oscillating Cutter ». Journal of Manufacturing Science and Engineering 121, no 1 (1 février 1999) : 54–60. http://dx.doi.org/10.1115/1.2830575.

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Chatter is one of the critical issues in a machining process since it deteriorates the surface quality of a workpiece and reduces machining efficiency. A new method is developed to suppress chatter in which an oscillating cutter is used to machine the workpiece through a stepping motor and a transmission mechanism so as to vary tool rake angle continuously and periodically in process. Theoretical analyses are performed on the stability of the cutting system, and verified by the experimental studies. Both theoretical analyses and experimental results indicate that the method can suppress chatter in a turning process effectively. With the application of an oscillating cutter, the amplitude can be reduced by 80 percent in cutting a steel workpiece.
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Yang, Yi Qing, et T. T. Chen. « Numerical Solution of Tuned Mass Dampers for Optimum Milling Chatter Suppression ». Materials Science Forum 697-698 (septembre 2011) : 223–28. http://dx.doi.org/10.4028/www.scientific.net/msf.697-698.223.

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The most common tunings for the TMD in the field of vibration suppression are H∞ and H2. However, regenerative machine tool chatter is a complex problem with many variations, which therefore requires a new tuning for the optimum chatter suppression. The real part based tuning is investigated numerically by employing the minimax numerical approach, which aims to maximize the minimum real part of the primary structure under the harmonic excitation. The performances of multiple TMDs system are discussed. A face milling case is employed to verify the benefits of multiple TMDs in increasing the chatter free depth of cut. It is concluded that multiple TMDs configuration are more effective than single TMD in chatter control.
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Thèses sur le sujet "Chatter suppression"

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Zhang, Yuanming. « Piezoelectric damping for chatter suppression in high-speed milling ». Thesis, University of Sheffield, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434511.

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Pratt, Jon Robert Jr. « Vibration Control for Chatter Suppression with Application to Boring Bars ». Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/29344.

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A mechatronic system of actuators, sensors, and analog circuits is demonstrated to control the self-excited oscillations known as chatter that occur when single-point turning a rigid workpiece with a flexible tool. The nature of this manufacturing process, its complex geometry, harsh operating environment, and poorly understood physics, present considerable challenges to the control system designer. The actuators and sensors must be rugged and of exceptionally high bandwidth and the control must be robust in the presence of unmodeled dynamics. In this regard, the qualitative characterization of the chatter instability itself becomes important. Chatter vibrations are finite and recognized as limit cycles, yet modeling and control efforts have routinely focused only on the linearized problem. The question naturally arises as to whether the nonlinear stability is characterized by a jump phenomenon. If so, what does this imply for the "robustness" of linear control solutions? To answer our question, we present an advanced hardware and control system design for a boring bar application. Initially, we treat the cutting forces merely as an unknown disturbance to the structure which is essentially a cantilevered beam. We then approximate the structure as a linear single-degree-of-freedom damped oscillator in each of the two principal modal coordinates and seek a control strategy that reduces the system response to general disturbances. Modal-based control strategies originally developed for the control of large flexible space structures are employed; they use second-order compensators to enhance selectively the damping of the modes identified for control. To attack the problem of the nonlinear stability, we seek a model that captures some of the behavior observed in experiments. We design this model based on observations and intuition because theoretical expressions for the complex dynamic forces generated during cutting are lacking. We begin by assuming a regenerative chatter mechanism, as is common practice, and presume that it has a nonlinear form, which is approximated using a cubic polynomial. Experiments demonstrate that the cutting forces couple the two principal modal coordinates. To obtain the jump phenomena observed experimentally, we find it necessary to account for structural nonlinearies. Gradually, using experimental observation as a guide, we arrive at a two-degree-of-freedom chatter model for the boring process. We analyze the stability of this model using the modern methods of nonlinear dynamics. We apply the method of multiple scales to determine the local nonlinear normal form of the bifurcation from static to dynamic cutting. We then find the subsequent periodic motions by employing the method of harmonic balance. The stability of these periodic motions is analysed using Floquet theory. Working from a model that captures the essential nonlinear behavior, we develop a new post-bifurcation control strategy based on quench control. We observe that nonlinear state feedback can be used to control the amplitude of post-bifurcation limit cycles. Judicious selection of this nonlinear state feedback makes a supplementary open-loop control strategy possible. By injecting a harmonic force with a frequency incommensurate with the chatter frequency, we find that the self-excited chatter can be exchanged for a forced vibratory response, thereby reducing tool motions.
Ph. D.
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Xu, Diancheng. « A fuzzy logic approach for chatter detection and suppression in end milling ». Thesis, University of Ottawa (Canada), 2003. http://hdl.handle.net/10393/26351.

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In metal cutting processes, excessive vibration or chatter has an adverse effect on productivity and product surface quality. Various studies have been reported in the literature over the past few decades. However, the real application of the outcome of these studies has been very limited. A new system has been developed in this study for chatter detection and chatter suppression. The coherence function values of the frequency spectra from two accelerometers in orthogonal directions were used as a chatter indicator. The vibration energy was used to offset the over-vigilance behaviour of the coherence function. A fuzzy logic control approach was used for chatter suppression based on both the coherence function value and vibration energy level. To improve the adaptability of the fuzzy controller, a self-learning algorithm has also been developed for on-line updating the fuzzy rule base. A direct output tuning method was also proposed to improve the responsiveness of the system. The proposed system has been tested using both steel and aluminium workpieces with and without thin-walls. The experimental results show that the proposed system worked reasonably well for on-line chatter detection and suppression. The thesis also explored the possibility of using the coherence function for chatter prediction. The verification of its feasibility may be carried out in the future.
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Wang, Lei. « Chatter detection and suppression using wavelet and fuzzy control approaches in end milling ». Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27074.

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In metal cutting processes, chatter has been recognized as one of the main factors that limit machining productivity and affect product quality. Two different categories of chatter were classified by researchers, i.e., regenerative chatter and non-regenerative chatter, and in this thesis the former is mainly studied. Over the past few decades, though various chatter detection and suppression methods have been developed, their industrial acceptance is still very limited. This research work presents a new system for on-line chatter detection and suppression. Its detection module implements a statistical index to identify chatters by performing wavelet transform and conducting statistical analysis of positive wavelet transform modulus maxima (WTMM). To suppress chatter, two versions of fuzzy control modules, i.e., plain fuzzy control and self-regulating fuzzy control have been implemented. Unlike the previous chatter suppression systems, the new suppression module features two-way adjustment, i.e., both increasing and decreasing the amount of adjustment. Along with the use of single or multi-output control variables to suppress chatter, productivity is preserved as much as possible. The proposed system is implemented on a SERVO 2000 milling machine. Extensive tests have been carried out. The experimental results show that the wavelet-based chatter detection index can not only detect the existence of chatters but also distinguish the severity levels. The new chatter suppression module works reasonably well in most tests. However, its performance is adversely affected in the presence of non-regenerative vibrations due to the lack of workpiece or clamping rigidity. Further improvements need to be carried out for industrial applications.
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Iglesias, Alex. « Milling stability improvement through novel prediction and suppression techniques ». Doctoral thesis, Universitat de Girona, 2016. http://hdl.handle.net/10803/392143.

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Chatter is one of the major problems in today’s milling processes. Theoretical models to calculate stability lobes are used to predict and avoid chatter onset. However, current predictions are not accurate enough and significant deviations between predicted and experimentally observed stability limits have been reported.The causes for these deviations are diverse and can be the result of the sum of multiple effects. According to previous works, main errors in stability prediction are related to lack of knowledge about double period instability (flip lobes) and inappropriate determination of dynamic parameters through standard experimental characterization techniques. This Thesis deals with these two problems that affect accurate chatter prediction, contributing with new knowledge and calculation methods for double period type lobes and developing a new methodology for a more accurate dynamic response identification. Nevertheless, an accurate chatter stability prediction does not necessarily imply an optimum use of the machine to maximize productivity, as it is required in current production environments. For this reason, three novel process stabilization techniques are proposed for those cases in which the designed machining process is subject to chatter vibrations.
El chatter és avui en dia un dels principals problemes en els processos de fresat. Per predir i evitar la seva aparició es disposa de models teòrics per al càlcul dels lòbuls d'estabilitat. No obstant això, les prediccions realitzades amb els models d'estabilitat de fresat no són robustes, presentant casos en què les desviacions entre la predicció i la realitat són importants. Les causes d'aquestes desviacions són variades i poden ser degudes a la suma de múltiples efectes. A la vista dels estudis previs realitzats, els principals errors es troben en l'omissió de lòbuls de doble període (lòbuls flip) i errors en la determinació experimental dels paràmetres dinàmics del sistema mitjançant mètodes tradicionals. Aquesta Tesi aborda aquests dos problemes principals en la predicció, aportant nous coneixements sobre el chatter de doble període i desenvolupant una nova metodologia per a un càlcul més precís de la resposta dinàmica del sistema. No obstant això, una predicció precisa de les condicions que donen lloc a un procés de fresat estable no garanteix l'aprofitament òptim de la màquina per maximitzar la productivitat, tal com s'exigeix en l'entorn productiu actual. Per això, es proposen tres noves tècniques per a l'eliminació de chatter en aquells casos en què, el procés de mecanitzat dissenyat estigui sota el perillós influx del chatter.
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Tsai, Cheng-Han, et 蔡政翰. « The Study of Optimal Control for Chatter Suppression ». Thesis, 2006. http://ndltd.ncl.edu.tw/handle/89433539737599207294.

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碩士
國立高雄第一科技大學
機械與自動化工程所
94
ABSTRACT Chatter is a nuisance to precision machining. Most previous research regarded the time-delay effect in the chatter problems as a disturbance. This research focuses on the investigation of this time-delay problem, and considers its effect for chatter controller design. In this way, one would achieve a better performance of improving the machining stability. First, the time-delay effect is included in the formulation of equations of motion for a machining process. Then the optimal control is adopted for the system with the time-delay term, and the Riccati equation is derived for the optimal controller. Finally the computer simulation is conducted for verification, and the improvement on stability lobes is then discussed.
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Hsu, Min-Ho, et 徐敏和. « Suppression of Chatter in End Milling by Fuzzy Control ». Thesis, 1994. http://ndltd.ncl.edu.tw/handle/28344552401934226378.

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Wu, Chung-Wey, et 吳仲偉. « Robust Controller for the Suppression of Chatter in Precision Machining ». Thesis, 2008. http://ndltd.ncl.edu.tw/handle/01056180570385986200.

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碩士
逢甲大學
自動控制工程所
96
Chatter is a self-excited vibration during machining that causes violent vibration between the tool and the workpiece. Chatter degrades surface finish, causes wear or breakage of tools and limits the material removal rate. This phenomenon is more conspicuous on slender workpiece. Therefore, the ability to suppress chatter can improve machining performance significantly. In this study, the chatter suppression problem is investigated for slender workpieces in turning. A tool holder driven by a piezoelectric actuator is designed and controlled. Based on the H∞ controller may change the chip width dynamically by controller signal voltage for chatter suppression in the turning process. Experimental modal analysis and ANSYS finite-element modal analysis are carried out for obtaining accurate frequency response functions of the workpiece and the cutting tool for designing controllers. According to the chatter theory, the happening of chatter has important relation to the structure’s dynamic transfer function of the workpiece and cutting tool. Based on the model matching conception and applied H∞ control theory to design a controller to have the higher critical stabile value of the structure’s dynamic transfer function. The performance of controller is tested first in a simulative environment, then an experimental structure is built by utilizing dSPACE, include of the real cutter and the computer-modelling workpiece and cutting status. To proceed with the machining experiment, the lathe was refitted to mount the piezo-actuated tool holder. Compared with the results of cutting by traditional tool holder and uncontrolled piezo-actuated tool holder and controlled piezo-actuated tool holder under the same cutting condition, to make sure the H∞ controller possess the ability of chatter suppress effectively.
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Tsung-HsuanWu et 吳宗軒. « An Investigation on Milling Chatter Suppression via Spindle Speed Variation ». Thesis, 2017. http://ndltd.ncl.edu.tw/handle/98eu7j.

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碩士
國立成功大學
機械工程學系
105
In this study, effect of sinusoidal spindle speed variation on end milling is investigated based on semi discretization method. Tooth passing period is changed by period spindle speed variation, then result in interruption of regernerative effect and supress chatter. In order to clarify effect of system parameters on variable speed machining stability, effect of variation amplitude, variation frequency, modal parameters, shearing constant and process damping coefficients on stability of variable speed system is investigated in the present study. The results of simulation show that the dominant parameters are variation amplitude, variation frequency and process damping coefficients. Appropriate amplitude and frequency should be choosed to supress chatter at different nominal spindle speed. Process damping effect increases milling stability at low speed region dramatically and increases the asymptotic speed, which is absolutely stable speed. But semi discretization method including process damping also takes longer simulation time. The results of simulation also show that variable speed machining suppress chatter effectively at local worst speeds, that is, the speeds that have lowest stable cutting depth. But such method cause negative effect on sweet spot, transform the machining system from stable to unstable. Modal parameters, flute number, and shearing coefficients do not affect the efficiency of improving the milling stability by variable speed machining. Experimental results also show that variable speed machining can reduce vibration amplitude when chatter is occurring.
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SALLESE, LORENZO. « On the development of active fixtures for the mitigation of chatter vibrations in milling ». Doctoral thesis, 2017. http://hdl.handle.net/2158/1081178.

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In the last decades, unstable vibrations originated in the milling process, often referred to as chatter vibrations, have collected the interest of several researches, mainly driven by the detrimental effect this phenomenon generates on productivity, surface finishing and tool wear. Although several approaches and techniques have been developed nowadays, their industrial application is still limited by the required expertise, time-consuming procedures or relevant interventions on the machine tool structures. This research is focused on the investigation and design of active fixtures to mitigate chatter vibrations in milling, considering that this kind of devices could represent an appealing industrial alternative, due to the fact that they can be directly retrofitted to different machine tools and applied to different machining operations. The aim of this thesis was to improve the performance of intelligent active fixtures by carefully addressing the specific design challenges, both in terms of mechanical design and control aspects. The main focus was put in extending the device bandwidth in accordance with the requirements of a general chatter mitigation application, where chatter frequencies can easily reach and exceed several kilohertz. In particular, specific design guidelines and simplified modeling strategies, aimed at supporting the definition of an adequate mechanical design, are presented and discussed along with the selection of suitable actuation devices capable of granting the needed reliability, even when operated at high frequencies in demanding dynamic applications. Moreover, this work presents the development of a novel control strategy aimed at exploiting low-frequency excitation to disrupt chatter vibrations, without requiring the further extension of the device bandwidth nor the preliminary system identification and modelling, as generally needed for renowned model-based control techniques.
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Chapitres de livres sur le sujet "Chatter suppression"

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Jackson, Mark J., H. Zhang et J. Ni. « Machining Chatter Suppression ». Dans Machining with Nanomaterials, 55–75. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19009-9_3.

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O’Toole, Michael D., Kaddour Bouazza-Marouf et David Kerr. « Chatter Suppression in Sliding Mode Control : Strategies and Tuning Methods ». Dans ROMANSY 18 Robot Design, Dynamics and Control, 109–16. Vienna : Springer Vienna, 2010. http://dx.doi.org/10.1007/978-3-7091-0277-0_12.

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Kong, Tian Rong, De Qing Mei et Zi Chen Chen. « Research on the Boring Chatter Suppression Based on MR Fluid ». Dans Materials Science Forum, 365–68. Stafa : Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-421-9.365.

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Dohnal, Fadi, Wolfgang Alois Hörtnagel et Mariusz Zamojski. « Numerical and Analytical Investigation of Chatter Suppression by Parametric Excitation ». Dans Perspectives in Dynamical Systems II : Mathematical and Numerical Approaches, 253–60. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77310-6_22.

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Ren, Jun Xue, Ding Hua Zhang, Yao Yao Shi et Zeng Qiang Wang. « Research on the Chatter Suppression During Machining Thin-Walled Complex Blades ». Dans Materials Science Forum, 616–19. Stafa : Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-421-9.616.

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Svinin, V. M., A. V. Savilov et A. V. Shutenkov. « Software Spindle Speed Variation as Method for Chatter Suppression in Drilling ». Dans Lecture Notes in Mechanical Engineering, 131–39. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-22063-1_15.

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Tian, Lizhi, Jianhua Wu, Zhenhua Xiong et Han Ding. « Active Chatter Suppression in Turning of Low-Rigidity Workpiece by System Matching ». Dans Intelligent Robotics and Applications, 609–18. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-22876-1_53.

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Li, Chen Jung, A. G. Ulsoy et W. J. Endres. « The Effect of Spindle Speed Variation on Chatter Suppression in Rotating-Tool Machining ». Dans Materials Science Forum, 859–64. Stafa : Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-990-3.859.

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Tsai, Shing-Yuan, et Shien-Ming Wu. « On-Line Identification and Suppression of Time Varying Machining Chatter in Turning Via Dynamic Data System (DDS) Methodology ». Dans Computer-Based Automation, 481–505. Boston, MA : Springer US, 1985. http://dx.doi.org/10.1007/978-1-4684-7559-3_21.

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YU, J.-Y., X.-J. Han et B.-D. Wu. « Study on Mechanism of Suppressing Regenerative Chatter by Cutting with Fluctuating Speed ». Dans Proceedings of the Twenty-Seventh International Matador Conference, 245–54. London : Macmillan Education UK, 1988. http://dx.doi.org/10.1007/978-1-349-09912-2_35.

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Actes de conférences sur le sujet "Chatter suppression"

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Nankali, Amir, Harsheeta Surampalli, Young S. Lee et Tama´s Kalma´r-Nagy. « Suppression of Machine Tool Chatter Using Nonlinear Energy Sink ». Dans ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48502.

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Suppression of regenerative instability in a single-degree-of-freedom (SDOF) machine tool model was studied by means of targeted energy transfers (TETs). The regenerative cutting force generates time-delay effects in the tool equation of motion, which retained the nonlinear terms up to the third order in this work. Then, an ungrounded nonlinear energy sink (NES) was coupled to the SDOF tool, by which biased energy transfers from the tool to the NES and efficient dissipation can be realized whenever regenerative effects invoke instability in the tool. Shifts of the stability boundary (i.e., Hopf bifurcation point) with respect to chip thickness were examined for various NES parameters. There seems to exist an optimal value of damping for a fixed mass ratio to shift the stability boundary for stably cutting more material off by increasing chip thickness; on the other hand, the larger the mass ratio becomes, the further the occurrence of Hopf bifurcation is delayed. The limit cycle oscillation (LCO) due to the regenerative instability appears as being subcritical, which can be (locally) eliminated or attenuated at a fixed rotational speed of a workpiece by the nonlinear modal interactions with an NES (i.e., by means of TETs). Three suppression mechanisms have been identified; that is, recurrent burstouts and suppressions, partial and complete suppressions of regenerative instabilities in a machine tool model. Each suppression mechanism was characterized numerically by time histories of displacements, and wavelet transforms and instantaneous energies. Furthermore, analytical study was performed by employing the complexification-averaging technique to yield a time-delayed slow-flow model. Finally, regenerative instability suppression in a more practical machine tool model was examined by considering contact-loss conditions.
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Ghasempoor, A., et I. Siddiqui. « Adaptive Feedforward Chatter Suppression in Machining ». Dans Aerospace Manufacturing Technology Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States : SAE International, 2003. http://dx.doi.org/10.4271/2003-01-2915.

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Pratt, J., A. Nayfeh, J. Pratt et A. Nayfeh. « Active vibration control for chatter suppression ». Dans 38th Structures, Structural Dynamics, and Materials Conference. Reston, Virigina : American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-1210.

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Yang, Fulun, Bi Zhang et Junyi Yu. « Chatter Suppression via an Oscillating Cutter ». Dans ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-1175.

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Abstract Chatter is one of the critical issues in a machining process since it deteriorates the surface quality of a workpiece and reduces machining efficiency. A new method is developed to suppress chatter in which an oscillating cutter is used to machine the workpiece through a stepping motor and a transmission mechanism so as to vary tool rake angle continuously and periodically in process. Theoretical analyses are performed on the stability of the cutting system, and verified by the experimental studies. Both theoretical analyses and experimental results indicate that the method can suppress chatter effectively. With the application of an oscillating cutter, the amplitude can be reduced by 80% in cutting a steel workpiece.
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Yang, Fulun, Bi Zhang et Junyi Yu. « Chatter Suppression With Multiple Time-Varying Parameters in Turning ». Dans ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0679.

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Abstract This paper presents a new method, multiple time-varying parameter (MTVP) turning for chatter suppression. Compared to the single time-varying parameter (STVP) turning, the new method uses both time-varying spindle speed and time-varying rake angle to suppress chatter. The paper provides theoretical analyses on the MTVP turning and experimental results to justify the analytical results. It compares the effects of chatter suppression between the MTVP and STVP turnings, and discusses the possible mechanisms of chatter suppression. The paper then concludes that the MTVP turning method is more effective in chatter suppression than the STVP turning method because of the combined effect of the multiple time-varying parameters. It is demonstrated that the MTVP turning method can suppress chatter by 80%, and can be applied to suppress all kinds of chatter in a machining process.
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Kurata, Yusuke, Norikazu Suzuki, Rei Hino et Eiji Shamoto. « Chatter suppression in milling with anisotropic tools ». Dans 2009 International Symposium on Micro-NanoMechatronics and Human Science (MHS). IEEE, 2009. http://dx.doi.org/10.1109/mhs.2009.5351857.

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Browning, Douglas R., Igor Golioto et Norman B. Thompson. « Chatter Suppression in Milling : An Active Approach ». Dans ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0118.

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Abstract A new approach to chatter control in milling is presented in this paper. The proof-of-concept control system comprises a tool holder, analog and digital control electronics, and power amplifiers to drive the actuator elements. The active tool holder, designed to impart counter-vibration forces to the milling tool, mounts to existing machines with a standard industrial interface. Sensors and piezoelectric actuators are imbedded in the stationary portion of the tool holder and are therefore fixed relative to the body of the milling machine. The controller operates on the two sensor signals, producing two orthogonal actuator drive signals to oppose resonant tool vibrations induced from the cutting forces. The paper first introduces the fundamental concepts of milling chatter and their relation to the described active system. The actuation, sensing and controller details follow. The influence of the tool holder on system dynamics and cutting stability is also addressed. Cutting test results using a titanium alloy are then described, demonstrating an improvement of a factor of five in surface finish relative to the uncontrolled, chatter-dominated case.
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Wang, Yang, Lue Zhang, Tao Chen et Lining Sun. « Chatter Suppression with Piezoelectric Film for Microstructure Surface Structuring ». Dans 2018 IEEE 13th Annual International Conference on Nano/Micro Engineered and Molecular Systems (NEMS). IEEE, 2018. http://dx.doi.org/10.1109/nems.2018.8556977.

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Bak, Chanbeom, et Hungsun Son. « Magnetostrictive Actuator for Chatter Vibration Suppression of Boring Bar ». Dans 2018 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2018. http://dx.doi.org/10.1109/aim.2018.8452250.

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Ho, Chao-Ching, Jin-Chen Hsu, Chih-Hao Lien et Ping-Yen Hsieh. « In situ chatter suppression in milling machines using microphone ». Dans International Symposium on Precision Engineering Measurement and Instrumentation 2012, sous la direction de Jie Lin. SPIE, 2013. http://dx.doi.org/10.1117/12.2014420.

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