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Relevant bibliographies by topics / Chatter suppression

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Dissertations / Theses

Academic literature on the topic 'Chatter suppression'

Author: Grafiati

Published: 10 March 2023

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Dissertations / Theses on the topic "Chatter suppression"

1

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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2

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

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3

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 co

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4

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 sta

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5

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 dy

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6

Tsai, Cheng-Han, and 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<br>國立高雄第一科技大學<br>機械與自動化工程所<br>94<br>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

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7

Hsu, Min-Ho, and 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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8

Wu, Chung-Wey, and 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<br>逢甲大學<br>自動控制工程所<br>96<br>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∞ contr

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9

Tsung-HsuanWu and 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<br>國立成功大學<br>機械工程學系<br>105<br>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

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10

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 mitiga

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