Results 181 to 190 of about 1,067 (222)
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Detection and Suppression of Drilling Chatter
Journal of Dynamic Systems, Measurement, and Control, 1994The 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.
Tarng, Y.S., Li, T.C.
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Detection of the onset of chatter vibration
Journal of Sound and Vibration, 1986In a flexible manufacturing system or a fully automated machining system, the computer control system of the machine tools must be able to recognize and control the cutting states, particularly the unwanted ones. Chatter vibration being one of them, its onset needs to be detected.
Rahman, M., Ito, Y.
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Method for chatter detection with standard PLC systems
Production Engineering, 2012The aim of growing productivity together with increasing quality demands in machining leads to milling processes that are near their stability limits. The remaining stability reserves become smaller and the risk of unstable processing conditions like chatter increases.
Abele, Eberhard +2 more
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Early Chatter Detection using MaxEnt and SPRT
2019 6th International Conference on Control, Decision and Information Technologies (CoDIT), 2019In high-speed milling process, the early detection of chatter contains two aspects, one is the fast detection of the initial symptom of the chatter, the other is to recognize the slight chatter embedded in the noisy signal. This paper presents an online cumulative chatter detection method for high-speed milling process based on once-per-revolution ...
Yanqing Zhao +3 more
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Development of chatter detection in milling processes
The International Journal of Advanced Manufacturing Technology, 2012The aim of this research is to develop an in-process detection of the chatter for the actual milling processes regardless of any cutting condition within the small data processing time by utilizing the dynamic cutting forces obtained during cutting. The proposed method introduces three parameters, which are calculated and obtained by taking the ratio ...
Somkiat Tangjitsitcharoen +1 more
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A New Method for Chatter Detection in Grinding
CIRP Annals, 2002Abstract A new method for automatic chatter detection in outer-diameter grinding is proposed which exploits significant changes in grinding dynamics caused by the onset of chatter. The method is based on monitoring of a non-linear statistic called the coarse-grained entropy rate.
E. Govekar +4 more
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In-Process Detection of Chatter Threshold
Journal of Engineering for Industry, 1988This investigation is an attempt to propose a method to determine the chatter threshold precisely so that a flexible manufacturing system can be materialized or a dynamic performance test criteria for a machine tool can be established. It has been found that the chatter threshold can be easily detected through the in-process measurement of the ...
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In-process detection and suppression of chatter in milling
International Journal of Machine Tools and Manufacture, 1992Abstract The use of a continuously variable spindle speed as a means of suppressing chatter in milling is investigated. A digital simulation model for dynamic milling is presented. The model includes runout, process damping and stiffness contributed by flank interference with and without tool wear, and spindle speed variation.
Y. Altintas, Philip K. Chan
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Pattern recognition for on-line chatter detection
Mechanical Systems and Signal Processing, 1988Abstract A pattern recognition strategy for on-line chatter detection was proposed and developed by analysing the acceleration signals from a milling operation. The components of the feature vectors were defined in terms of total power and dispersion of the dominant forced and chatter vibration modes extracted from linear stochastic models ...
CHO, DW, EMAN, KF
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Multisensor approaches for chatter detection in milling
Journal of Sound and Vibration, 2008The development of a chatter detection system for application in industrial conditions was investigated. Several sensors— rotating dynamometer, accelerometers, acoustic emission and electrical power sensors— were compared to determine which signals are most sensitive to chatter onset.
KULJANIC, Elso +2 more
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