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Monitoring of Self-Excited Vibration in Grinding Process Using Time-Frequency Analysis of Acceleration Signals
(Ieee, 2018-01-01)
Grinding is a finish manufacturing process for high precision parts. As the part has high value added at this stage, anomalies and defects are unacceptable. Self-excited vibration or just chatter is an undesirable and ...
Tool condition monitoring of single-point dressing operation by digital signal processing of AE and AI
(Elsevier B.V., 2018-01-01)
This work aims at determining the right moment to stop single-point dressing the grinding wheel in order to optimize the grinding process as a whole. Acoustic emission signals and signal processing tools are used as primary ...
Fault location in underground systems through optimum-path forest
(2011-12-21)
In this paper we propose an accurate method for fault location in underground distribution systems by means of an Optimum-Path Forest (OPF) classifier. We applied the Time Domains Reflectometry method for signal acquisition, ...
Time-domain analysis based on the electromechanical impedance method for monitoring of the dressing operation
(Elsevier B.V., 2018-01-01)
Among the methods used in structural health monitoring (SHM), the electromechanical impedance technique (EMI), which uses piezoelectric transducers of lead zirconate titanate (PZT), stands out for its low cost. Then, this ...
Delay time detection and accommodation for a networked DC motor control
(2011-12-28)
This paper presents a control method that is effective to reduce the degenerative effects of delay time caused by a treacherous network. In present application a controlled DC motor is part of an inverted pendulum and ...
Control of thermal damage in grinding by digital signal processing of raw acoustic emission
(2002-12-01)
Grinding process is usually the last finishing process of a precision component in the manufacturing industries. This process is utilized for manufacturing parts of different materials, so it demands results such as low ...
Synthetic control chart for monitoring the pprocess mean and variance
(Int Soc Sci Appl Technol, 2006-01-01)
In this article, we consider the synthetic control chart with two-stage sampling (SyTS chart) to control the process mean and variance. During the first stage, one item of the sample is inspected; if its value X, is close ...
A Novel Time-Domain Technique for Damage Detection Applied to SHM Using Savitzky-Golay Filter
(Destech Publications, Inc, 2013-01-01)
This paper presents a novel damage detection approach for Structural Health Monitoring (SHM) systems, which is based on Savitzky-Golay filter and time-domain analysis. In this technique, a specific PZT (actuator) excites ...
A New Approach for Real Time Fault Diagnosis in Induction Motors Based on Vibration Measurement
(IEEE, 2010-01-01)
Condition monitoring is used to increase machinery availability and machinery performance, reducing consequential damage, increasing machine life, reducing spare parts inventories, and reducing breakdown maintenance. An ...
Wnt signaling in the processes of segmentation and elongation in the beetle Tribolium castaneum
(2014)
Introduction: In most arthropods segments form sequentially from a posterior growth zone in
an anterior to posterior fashion, just like vertebrate somites arise from presomitic mesoderm. In
both phyla, segmentation relies ...