Relevant bibliographies by topics / Instantaneous Angular Speed

Academic literature on the topic 'Instantaneous Angular Speed'

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Published: 11 March 2023

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Journal articles on the topic "Instantaneous Angular Speed"

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Li, Yuhua, Fengshou Gu, Georgina Harris, Andrew Ball, Nick Bennett, and Ken Travis. "The measurement of instantaneous angular speed." Mechanical Systems and Signal Processing 19, no. 4 (July 2005): 786–805. http://dx.doi.org/10.1016/j.ymssp.2004.04.003.

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Rémond, D., J. Antoni, and R. B. Randall. "Instantaneous Angular Speed (IAS) processing and related angular applications." Mechanical Systems and Signal Processing 45, no. 1 (March 2014): 24–27. http://dx.doi.org/10.1016/j.ymssp.2013.10.015.

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Khadraoui, Souha, Fabrice Bolaers, Olivier Cousinard, and Jean Paul Dron. "Low speed lifting cable diagnosis using instantaneous angular speed." Journal of Mechanical Science and Technology 35, no. 5 (April 20, 2021): 1821–28. http://dx.doi.org/10.1007/s12206-021-0402-x.

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Yousef Ben Sasi, Ahmed, Fengshou Gu, Bradley Payne, and Andrew Ball. "Instantaneous angular speed monitoring of electric motors." Journal of Quality in Maintenance Engineering 10, no. 2 (June 2004): 123–35. http://dx.doi.org/10.1108/13552510410539196.

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Xie, Jingsong, Jinglong Chen, Yizhen Peng, and Yanyang Zi. "A New Concept of Instantaneous Whirling Speed for Cracked Rotor’s Axis Orbit." Applied Sciences 9, no. 19 (October 2, 2019): 4120. http://dx.doi.org/10.3390/app9194120.

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At present, the axis orbit (whirling) and the instantaneous angular speed (spinning) are important symptoms in the condition monitoring of rotor systems. However, because of the lack of research of the transient characteristics of axis orbit within a whirl cycle, the axis orbit cannot reflect the instantaneous characteristics of the rotation during one whirling cycle like the instantaneous angular speed. Therefore, in this paper, a new concept of instantaneous whirling speed of axis orbit within a whirling cycle is proposed and defined. In addition, the transient characteristics of instantaneous whirling speed are studied. Meanwhile, the response mechanisms are qualitative analyzed through the study of the work of the additional stiffness excitation and the conversion relationship between the kinetic energy and the potential energy. Then, the minimum of the relative instantaneous whirling speed (RWS) is proposed as a potential monitoring index for crack severity. The instantaneous whirling speed is a new attribute of axis orbit and a new perspective for the vibration analysis of cracked rotors. The addition of this new attribute significantly increases the effect of axis orbit for distinguishing normal and cracked rotors. The new analysis perspective and the new diagnosis index are potential supplements for crack diagnosis.
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Popovic, Slobodan, and Miroljub Tomic. "Possibilities to identify engine combustion model parameters by analysis of the instantaneous crankshaft angular speed." Thermal Science 18, no. 1 (2014): 97–112. http://dx.doi.org/10.2298/tsci120907006p.

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In this paper, novel method for obtaining information about combustion process in individual cylinders of a multi-cylinder Spark Ignition Engine based on instantaneous crankshaft angular velocity is presented. The method is based on robust box constrained Levenberg-Marquardt minimization of nonlinear Least Squares given for measured and simulated instantaneous crankshaft angular speed which is determined from the solution of the engine dynamics torque balance equation. Combination of in-house developed comprehensive Zero-Dimensional Two-Zone SI engine combustion model and analytical friction loss model in angular domain have been applied to provide sensitivity and error analysis regarding Wiebe combustion model parameters, heat transfer coefficient and compression ratio. The analysis is employed to evaluate the basic starting assumption and possibility to provide reliable combustion analysis based on instantaneous engine crankshaft angular speed.
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Bonnardot, Frédéric, Khalid Lizoul, Saad Errafik, Hugo André, and François Guillet. "High frequency demodulation technique for instantaneous angular speed estimation." Mechanical Systems and Signal Processing 159 (October 2021): 107745. http://dx.doi.org/10.1016/j.ymssp.2021.107745.

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Moustafa, W., O. Cousinard, F. Bolaers, K. Sghir, and JP Dron. "Low speed bearings fault detection and size estimation using instantaneous angular speed." Journal of Vibration and Control 22, no. 15 (November 27, 2014): 3413–25. http://dx.doi.org/10.1177/1077546314560600.

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Renaudin, L., F. Bonnardot, O. Musy, J. B. Doray, and D. Rémond. "Natural roller bearing fault detection by angular measurement of true instantaneous angular speed." Mechanical Systems and Signal Processing 24, no. 7 (October 2010): 1998–2011. http://dx.doi.org/10.1016/j.ymssp.2010.05.005.

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Dereszewski, Mirosław, and Adam Charchalis. "MODEL BASED PREDICTION OF THE CRANKSHAFT INSTANTANEOUS ANGULAR SPEED FLUCTUATIONS." Journal of KONES. Powertrain and Transport 20, no. 1 (January 25, 2013): 55–61. http://dx.doi.org/10.5604/12314005.1135314.

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Dissertations / Theses on the topic "Instantaneous Angular Speed"

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Spagnol, Marco. "Maintenance of electrical machines: Instantaneous Angular Speed analysis." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11102.

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2013/2014
This research is focused on the condition monitoring of electrical machines and its long term purpose is to monitor electrical and mechanical faults at the same time, in non-stationary conditions (variable load and speed), with a single piece of hardware. The Instantaneous Angular Speed (IAS) measurement of an electrical machine is proposed and analysed in order to detect the fault development inside it. Chapter 1 introduces some basic principles about the maintenance of an electrical machine. Machine unscheduled downtimes are frequently caused by bearing faults, and rotor/stator faults. Monitoring systems are needed when the machine is very important for the plant (cost, safety). In this chapter, the electrical machine’s behaviour is also examined. Induction electrical machines have been chosen for this research. A review of the excitation frequencies is reported in the chapter. In the last section, characteristic fault frequencies (from mechanical and electrical sources) are collected. Chapter 2 presents the IAS measurement and its signal processing. The IAS is the measurement of the shaft rotating speed in order to visualize what’s happening during a single or in multiple turns. There are many measurement methods which are based either analogical to digital conversion or which use counters. Analogical to digital methods use a standard data acquisition board. Counter methods have to use specific hardware that is more expensive, but with less data to store. In this research, the counter method is used, combined with the Elapsed Time (ET) counting technique. Chapter 3 describes the encoder system. Its output signal is acquired with an oscilloscope and with the counter board. The signal’s differences are highlighted. In this chapter, the measurement’s source of errors are listed: the encoder’s geometrical error, the counter’s quantization error, the clock stability and the general electrical noise. Chapter 4 collects all the experimental tests done during the PhD research. Three experimental test rigs are shown and two measurements at Nidec ASI S.p.A. are reported. Note that the experimental test rigs were designed and built at the Università degli Studi di Trieste during the three years of the PhD. Experimental Test Rig 1 (ETR1) is used to understand the electrical motor’s behaviour with varying speed, the difference between the IAS and the speed acquired with the Torsional Laser Vibrometer, the difference between the IAS and the acceleration signal measured with an accelerometer located on the motor’s stator, the effect of the unbalance in the IAS measurement. Experimental Test Rig 2 (ETR2) allows to examine the load effect on the IAS measurement, the magneto-motive force harmonics, the slip and the rotor effects. Experimental Test Rig 3 (ETR3) is designed in order to detect the Inner Race Bearing Fault (Ball Pass Frequency Inner - BPFI) with varying load. The acceleration, the voltage and the current are compared with the Instantaneous Angular Speed. The motor is also tested with an unbalanced power supply. The two measurements at Nidec ASI S.p.A show how the IAS measurement could be implemented in an industrial machine larger than the one tested in the laboratory. This research presents the pros and cons of the IAS measurement, highlighting the capability of detecting BPFI bearing fault, feeling the load variations owing to the brake system (a synchronous generator), measuring the Fundamental Train Frequency of an healthy bearing, detecting unbalance in the rotor and other special features. The author would like to thank the Fondo Sociale Europeo, the Regione Friuli Venezia Giulia and Nidec ASI S.p.A (an electrical motor company) for the sponsorship and the collaboration during the three PhD years covered by the SHARM project ”Manutenzione Preventiva Integrata”.
Questo studio è focalizzato al monitoraggio dello stato di salute delle macchine elettriche con l'obbiettivo finale di monitorare danni meccanici ed elettrici, in condizioni non stazionarie (carico e velocità variabili), con un singolo sistema hardware. Viene quindi proposta ed analizzata la misura della Velocità Angolare Istantanea (Instantaneous Angular Speed - IAS) di una macchina elettrica allo scopo di prevedere l'insorgere di guasti al suo interno. Il Capitolo 1 introduce i principi base relativi alla manutenzione di macchine elettriche. Di frequente, le fermate non programmate sono conseguenti a danni su cuscinetti e su rotore/statore. I sistemi di monitoraggio sono indispensabili quando la macchina è molto importante nel contesto dell'impianto, considerazione esaminata sia dal punto di vista del costo che della sicurezza. In questo capitolo, viene analizzato anche il funzionamento della macchina elettrica. Dopo un'attenta valutazione, per lo sviluppo di questa ricerca sono state selezionate le macchine ad induzione asincrone. Nel capitolo è riportata anche un'analisi bibliografica sulle frequenze caratteristiche delle forzanti elettromagnetiche presenti. Nell'ultima sezione vengono elencate le frequenze tipiche dei danni rilevabili in misure di tipo vibrazionale ed elettrico. Il Capitolo 2 presenta la misura IAS. Questa rappresenta la misurazione della velocità di rotazione dell'albero e viene analizzata con accuratezza, individuando la relazione tra velocità di rotazione e le caratteristiche dell'encoder; inoltre vengono descritti i vari processamenti del segnale. Tale sistema permette di visualizzare ciò che sta accadendo alla macchina durante il suo funzionamento, in una o più rotazioni. Esistono metodi di misura basati o sulla conversione analogico-digitale o che prevedono l’impiego di contatori. I primi si servono di una scheda di acquisizione dati standard, mentre i secondi richiedono l'utilizzo di un hardware specifico, che alle volte può risultare più costoso, ma permette di acquisire i dati occupando una quantità inferiore di memoria. In questa tesi si è scelto di utilizzare un contatore per eseguire la misura IAS, sfruttando il conteggio Elapsed Time (ET). Il Capitolo 3 descrive l'encoder. Il segnale in uscita dal dispositivo viene acquisito con una scheda contatore e con un oscilloscopio in modo da confrontare ed analizzare le differenze presenti. In questo capitolo vengono elencate le tipologie di errore presenti nel sistema encoder: l'errore geometrico, l'errore di quantizzazione, l'errore dovuto alla stabilità del clock interno e l'errore dovuto a fonti esterni di rumore elettrico. Il Capitolo 4 raccoglie tutti i test sperimentali condotti durante il dottorato. Sono stati progettati e costruiti tre setup allo scopo di evidenziare particolari aspetti e problematiche; sono riportate anche due misure eseguite presso la sala prove dell'azienda Nidec ASI S.p.A. Il setup Experimental Test Rig 1 (ETR1) è stato utilizzato per conseguire le seguenti finalità: capire il funzionamento del motore elettrico con velocità variabile, analizzare la differenza della velocità acquisita con un torsiometro laser ed una scheda contatore, confrontare una misura vibrazionale (accelerometro posizionato sullo statore del motore) e la misura IAS, analizzare l'effetto dello sbilanciamento sulla misura IAS. Il setup Experimental Test Rig 2 (ETR2) permette di esaminare l'effetto del carico sulla misura IAS, le armoniche della forza elettromotrice, l'effetto dello slip e del rotore. Il setup Experimental Test Rig 3 (ETR3) è progettato in modo da evidenziare un difetto sulla guida interna di un cuscinetto, considerando anche un carico variabile. L'accelerazione, il voltaggio e la corrente sono confrontate con la Velocità Angolare Istantanea. Il motore viene testato anche applicando una tensione di alimentazione sbilanciata. Le due misure rilevate in Nidec ASI S.p.A dimostrano che la misura IAS può essere implementata in macchine industriali di grandi dimensioni e non solo nei setup di laboratorio. Questa ricerca espone gli aspetti positivi e negativi della misura IAS, evidenziando le capacità di individuare un danno sulla guida interna di un cuscinetto, captare le variazioni di carico prodotte dal freno (un generatore sincrono), misurare la Fundamental Train Frequency di un cuscinetto in buona salute, individuare uno sbilanciamento ed altre funzionalità. L'autore vuole ringraziare il Fondo Sociale Europeo, la Regione Friuli Venezia Giulia e l'azienda Nidec ASI S.p.A (produttore di macchine elettriche di medio-grandi dimensioni) per la sponsorizzazione e la collaborazione durante i tre anni di dottorato previsti dal progetto SHARM ”Manutenzione Preventiva Integrata”.
XXVII Ciclo
1983
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Madamedon, Misan. "The characteristics of instantaneous angular speed of diesel engines for fault diagnosis." Thesis, University of Huddersfield, 2018. http://eprints.hud.ac.uk/id/eprint/34553/.

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Early fault detection and diagnosis of diesel engines are paramount now, especially with countries like the UK and France, in-line with the 2015 Paris agreement on climate change, making plans to ban the use of an automobile with diesel and petrol engines before the year 2040. This ban could affect other sectors where diesel engines are the prime mover and result in more stringent exhaust emission regulations. The instantaneous angular speed (IAS) model based fault diagnosis has shown more prospects of fault detection and location. However, there are serious gaps in available knowledge regarding IAS model based fault diagnosis which takes into account the effect of the system’s modal properties. Hence, this research focuses on the online modal properties identification of a typical engine-load system for an improved performance of IAS based fault diagnosis. Having acknowledged the essentials of IAS based fault diagnosis techniques through a comprehensive literature study, this research firstly investigates the impact of modal properties on the IAS of a four-cylinder engine. This is achieved through a three degree of freedom (DOF) torsional vibration model of the engine-load system, which allows for the modal properties of the system to be calculated and analysed. The calculated modal properties of the system showed one rigid and two flexible modes which had a low (< 13Hz) and high (< 92Hz) frequencies. The mode shape of the low frequency resonance shows more amplitude on the flywheel-load reference point of the system while that of the high frequency resonance shows more amplitude on the engine-flywheel reference point of the system. It then simulated the IAS which represents the torsional vibration signature with altered modal properties. The simulated result demonstrated that the low frequency resonance is more sensitive to the peak and trough values of the IAS waveform. After identifying the deployment merits of operational modal analysis (OMA) techniques through a comprehensive literature study, this research then explore the prospect of an IAS based output-only modal properties identification of a typical engine-load system. This was done through both experimental and simulation evaluations, which allowed simulated and experimental IAS to be used for implementing covariance-driven reference based stochastic subspace identification (SSI). The simulated result using pseudo-random input shows that the identified resonance frequencies and mode shapes are 80% correlated with the calculated ones. The simulation results also demonstrated that the accuracy of the identified modal properties is dependent on the number of IAS responses used for implementing the covariance-driven reference based SSI technique. The experimental result using estimated IAS during engine shutdown operation showed that both high and low frequency vibration mode can be identified. The identified resonance frequencies with their mode shapes are 80% correlated with the predicted ones. Having identified the modal properties of the engine-load system online through the implementation of an IAS based covariance-driven SSI, this research then investigates the impact of misfire on the system’s modal properties especially the mode shape of the low frequency resonance. This was achieved experimentally by inducing a complete misfire in respective cylinders (1st, 3rd and 4th) and the IAS estimated during engine’s transient shutdown operation was used for implementing a covariance-driven reference based stochastic subspace modal properties identification. While the mode shape of the identified high frequency resonance (< 80Hz) showed no characteristics for cylinder misfire detection, that of the low frequency resonance (< 13Hz) did. Faults in the engine’s injection system and an abnormal clearance valve train conditions significantly affects its combustion process. The cylinder by cylinder pressure torque obtained from measured IAS through order domain deconvolution technique can be used to detect and diagnose injection faults. In the interim, this research has also recognised that the closer the low-resonance frequency of the model used for the order domain deconvolution gets to its real time value the more accurate the pressure torque becomes. The reconstructed pressure torque which takes into consideration the real time low frequency resonance can be used to detect faulty injection system with different severities and abnormal clearance valve conditions of several severities. Furthermore, the importance of an accurate modal properties utilisation in IAS model.
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Zhi, Shengke. "Development of an optical method to measure the instantaneous angular speed of machinery in condition monitoring." Thesis, University of Manchester, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491490.

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A research programme is described to develop an optical method to measure the instantaneous angular speed (lAS) of machinery in condition monitoring. In this research, special consideration is given to the development ofa non-contact method of measuring IAS using a laser mouse. Further development of its application to the detection ofparallel misalignment fault in condition monitoring is described. This research requires multidisciplinary design, involving the knowledge from measurement, electrical instruments, optics, mechanical engineering, majntenance engineering, modelling and programming. The research presented is a novel approach to non-contact measurement of lAS through the use of a laser mouse. Initial investigation of the characteristics of this device shows its potential for the measurement of lAS. The software application is developed to adapt the laser mouse to the Microsoft Windows operating system. Tests are carried out which show that the pixel variation acquired by the laser mouse has a linear relationship with its physical movement relative to the movement of the rotating shafts. Calibration tests show good correlation with the results of conventional, contact IAS measurement using a shaft encoder. It is concluded that using a laser mouse to measure the IAS is reliable method. An application of the IAS technique to the detection of the parallel shaft misalignment faults on a geared induction motor is described. Firstly, a mathematical model of IAS is developed for parallel misalignment. Secondly, a geared induction motor test rig is used to validate the model and to demonstrate the practical efficacy of IAS measurement by a laser mouse as a condition monitoring tool for detecting and identifying such faults. Finally, in agreement with the lAS model, the motor test rig is applied to show that parallel misalignment can be identified from the features extracted from the lAS data produced by the laser mouse. Specially, in the time domain, the amplitude of IAS waveform and the standard deviation of the IAS variation have a great increase when the parallel misalignment is occurred. The increase of the magnitude of parallel misalignment can make the amplitude of IAS waveform and the standard deviation of the IAS variation larger. In the frequency domain, the amplitude of the first component of rotational frequency appears much higher than those of the 2nd and 3rd components and has more increases, when the parallel misalignment is occurred. As the fault severity increased, the key characteristic of IAS spectra is a rise in the level of the first component of rotation frequency. The sensitivity of IAS to variations in power supply frequency and torque is also investigated using the motor test rig. It is found that variation in power supply frequency can increase in the value of the amplitude of IAS waveform and the standard deviation of IAS variation in the time domain, and can also increase in the amplitude of first component of rotational frequency in IAS spectra in the frequency domain. However, there is found to be little change in IAS with variation in torque. In conclusion, the laser mouse approach to non-contact measurement of lAS presented in this thesis can be used as an alternative to existing contact and non-contact methods, and the IAS technique can be used to identify the parallel misalignment faults in condition monitoring.
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Sambayi, Patrick Mukenyi Kataku. "Drill wear monitoring using instantaneous angular speed : a comparison with conventional technologies used in drill monitoring systems." Diss., University of Pretoria, 2012. http://hdl.handle.net/2263/32282.

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Most drill wear monitoring research found in the literature is based on conventional vibration technologies. However, these conventional approaches still have not attracted real interest from manufacturers for multiples of reasons: some of these techniques are not practical and use complicated Tool Condition Monitoring (TCM) systems with less value in industry. In addition, they are also prone to give spurious drill deterioration warnings in industrial environments. Therefore, drills are normally replaced at estimated preset intervals, sometimes long before they are worn or by expertise judgment. Two of the great problems in the implementation of these systems in drilling are: the poor signal-to-noise ratio and the lack of system-made sensors for drilling, as is prevalent in machining operations with straight edge cutters. In order to overcome the noise problems, many researchers recommend advanced and sophisticated signal processing while the work of Rehorn et al. (2005) advises the following possibilities to deal with the lack of commercial system-made sensors:  Some research should be directed towards developing some form of instrumented tool for drill operations.  Since the use of custom-made sensors is being ignored in drilling operations, effort should be focused on intelligent or innovative use of available sensor technology. It is expected that the latter could minimize implementation problems and allows an optimal drill utilization rate by means of modern and smart sensors. In addition to the accelerometer sensor commonly used in conventional methods, this work has considered two other sensor-based methods to monitor the drill wear indirectly. These methods entail the use of an instrumented drill with strain gauges to measure the torque and the use of an encoder to measure the Instantaneous Angular Speed (IAS). The signals from these sensors were analyzed using signal processing techniques such as, statistical parameters, Fast Fourier Transform (FFT), and a ii preliminary Time-Frequency (TF) analysis. A preliminary investigation has revealed that the use of a Regression Analysis (RA) based on a higher order polynomial function can very well follow and give prognosis of the development of the monitored parameters. The experimental investigation has revealed that all the above monitoring systems are sensitive to the deterioration of the drill condition. This work is however particularly concerned with the use of IAS on the spindle of the drill, compared to conventional monitoring systems for drill condition monitoring. This comparison reveals that the IAS approach can generate diagnostic information similar to vibration and torque measurements, without some of the instrumentation complications. This similitude seems to be logical, as it is well known that the increase of friction between the drill and workpiece due to wear increase the torque and consequently it should reduce or at least affect the spindle rotational speed. However, the use of a drill instrumented with a strain gauge is not practical, because of the inconvenience it causes on production machines. By contrast, the IAS could be measured quite easily by means of an encoder, a tachometer or some other smart rotational speed sensors. Thus, one could take advantage of advanced techniques in digital time interval analysis applied to a carrier signal from a multiple pulse per revolution encoder on the rotating shaft, to improve the analysis of chain pulses. As it will be shown in this dissertation, the encoder resolution does not sensibly affect the analysis. Therefore, one can easily replace encoders by any smart transducers that have become more popular in rotating machinery. Consequently, a non-contact transducer for example could effectively be used in on-line drill condition monitoring such as the use of lasers or time passage encoder-based systems. This work has gained from previous research performed in Tool Condition Monitoring TCM, and presents a sensor that is already available in the arsenal of sensors and could be an open door for a practical and reliable sensor in automated drilling. iii In conclusion, this dissertation strives to answer the following question: Which one of these methods could challenge the need from manufacturers by monitoring and diagnosing drill condition in a practical and reliable manner? Past research has sufficiently proved the weakness of conventional technologies in industry despite good results in the laboratory. In addition, delayed diagnosis due to time-consuming data processing is not beneficial for automated drilling, especially when the drill wears rapidly at the end of its life. No advanced signal processing is required for the proposed technique, as satisfactory results are obtained using common time domain signal processing methods. The recommended monitoring choice will definitely depend on the sensor that is practical and reliable in industry.
Dissertation (MEng)--University of Pretoria, 2012.
gm2013
Mechanical and Aeronautical Engineering
MEng
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Sung, Yi-Che, and 宋易哲. "The Diagnosis of Engine Misfire by Analysing the Instantaneous Engine Angular Speed." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/02402455585634237218.

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碩士
國防大學理工學院
車輛及運輸工程碩士班
103
The main purpose of this study is to discuss the accuracy of the instantaneous angular speed (IAS) analysis methods using on the engine misfire detection. The IAS analysis is a common method to detect the engine malfunction of misfiring. The signal of IAS can be measured by the rotary encoder installed on the crankshaft or the camshaft. By analyzing the signal of the IAS, the principles of pattern recognition and threshold value setting were selected to identify the faulty cylinder. However, the characteristic of the “overlapping of the power stroke” in multi-cylinder engine increases the difficulty and complexity of the engine diagnosis. Experiments were performed with an 8-cylinder, V-type, 4-stroke diesel engine. Through the IAS analysis methods and the DAQ system coordinating with control software, the novel diagnostic techniques based on the characteristic of the angular acceleration in the power stroke and the comparison of the angular speed patterns were deveploed in this study. These techniques are more reliable to identify the misfire of the multi-cylinder engine with the obvious characteristic of the overlapping of the power stroke. The PHM (Prognostic Health Management) system based on these techniques has been developed to promote the efficiency of engine diagnosis. The feasibility of the PHM system installing on the automobile engine has been proved in this study. In this research, it also points out that the dynamic load testing is more reliable than steady load testing. The engine temperature is another key factor which can affect the accuracy of the diagnosis.
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Book chapters on the topic "Instantaneous Angular Speed"

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Moustafa, W., O. Cousinard, F. Bolaers, K. Ait Sghir, and J. P. Dron. "Low Speed Bearings’ Instantaneous Angular Speed Behavior." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, 509–19. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_41.

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Gomez, Jose L., Adeline Bourdon, Hugo André, and Didier Rémond. "Modelling Roller Bearing Dynamics Inducing Instantaneous Angular Speed Variations." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, 431–42. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_34.

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Spagnol, Marco, and Luigi Bregant. "Instantaneous Angular Speed Analysis, Measurement Errors and Signal Filtering." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, 521–31. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_42.

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Roy, Sankar K., A. R. Mohanty, and C. S. Kumar. "Cepstrum Analysis of Instantaneous Angular Speed for Gearbox Fault Detection." In Advances in Mechanical Engineering, 1117–25. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-0124-1_99.

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Spagnol, M., and L. Bregant. "Instantaneous Angular Speed: Encoder-Counter Estimation Compared with Vibration Data." In Lecture Notes in Mechanical Engineering, 347–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39348-8_29.

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Bruand, Guillaume, Florent Chatelain, Pierre Granjon, Nadine Martin, Christophe Duret, and Hervé Lénon. "Estimating the Rotational Synchronous Component from Instantaneous Angular Speed Signals in Variable Speed Conditions." In Applied Condition Monitoring, 90–100. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-11220-2_10.

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Braut, Sanjin, Roberto Zigulic, Goranka Stimac, and Ante Skoblar. "Light Rotor-Stator Partial Rub Characterization Using Instantaneous Angular Speed Measurement." In Mechanisms and Machine Science, 673–82. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09918-7_60.

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Roy, Sankar K., A. R. Mohanty, and C. S. Kumar. "Amplitude Demodulation of Instantaneous Angular Speed for Fault Detection in Multistage Gearbox." In Mechanisms and Machine Science, 951–61. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09918-7_84.

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Spagnol, Marco, Luigi Bregant, and Alessandro Boscarol. "Electrical Induction Motor Higher Harmonics Analysis Based on Instantaneous Angular Speed Measurement." In Applied Condition Monitoring, 27–41. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-20463-5_3.

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André, Hugo, Adeline Bourdon, and Didier Rémond. "Instantaneous Angular Speed Monitoring of a 2MW Wind Turbine Using a Parametrization Process." In Condition Monitoring of Machinery in Non-Stationary Operations, 415–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28768-8_44.

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Conference papers on the topic "Instantaneous Angular Speed"

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Zeng, Qiang, Mones Zainab, Yimin Shao, Fengshou Gu, and Andrew D. Ball. "Planetary gear fault diagnosis based on instantaneous angular speed analysis." In 2017 23rd International Conference on Automation and Computing (ICAC). IEEE, 2017. http://dx.doi.org/10.23919/iconac.2017.8081996.

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Arif, S. Javed, Imdadullah, and M. S. Jamil Asghar. "Rotating magnetic field based instantaneous angular speed measurement of low speed rotating machines." In 2011 International Conference on Multimedia, Signal Processing and Communication Technologies (IMPACT). IEEE, 2011. http://dx.doi.org/10.1109/mspct.2011.6150487.

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Lamraoui, M., M. Thomas, M. El Badaoui, and F. Girardin. "Cyclostationarity analysis of instantaneous angular speeds for monitoring chatter in high speed milling." In IECON 2012 - 38th Annual Conference of IEEE Industrial Electronics. IEEE, 2012. http://dx.doi.org/10.1109/iecon.2012.6389274.

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Liang, Lin, Zhe Lei, Maolin Li, and Xiangwei Kong. "Feature Extraction of Gearbox based on Order Analysis of Instantaneous Angular Speed." In 2018 IEEE 7th Data Driven Control and Learning Systems Conference (DDCLS). IEEE, 2018. http://dx.doi.org/10.1109/ddcls.2018.8516049.

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Andre´, Hugo, Didier Re´mond, and Adeline Bourdon. "On the Use of the Instantaneous Angular Speed Measurement in Non Stationary Mechanism Monitoring." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-47470.

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Power transmission faults are one important cause of machine downtime many production activities are working to prevail. Vibration monitoring tools have achieved this role on the assumption that the stationary condition hypothesis is maintained. Several industries, including wind energy production, are however demanding to observe mechanical or electrical rotating components behaviour at variable speeds. Instantaneous angular speed measurement has been recently proven able to detect localized faults in bearings using only an encoder close from the source of the defect. This paper presents the results obtained from a large span experiment on a 2MW wind turbine. The uniqueness of the sensor used to monitor the whole line shafting along with the continuous non stationary conditions are so many difficulties cumulated on this attempt. Two basic signal processing tools are theoretically defined and experimentally applied in an original way on the Instantaneous Angular Speed measurement to efficiently tackle these practical issues.
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Zhao, Ming, Jing Lin, and Junhua Xu. "The measurement and error analysis of instantaneous angular speed using optical incremental encoder." In International Conference on Optical Instruments and Technology (OIT2011). SPIE, 2011. http://dx.doi.org/10.1117/12.902978.

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Al-Hashmi, S., F. Gu, Y. Li, A. D. Ball, Tao Fen, and Ke Lui. "Cavitation Detection of a Centrifugal Pump Using Instantanous Angular Speed." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58255.

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Cavitation is a common fault in centrifugal pumps. The detection and diagnosis of the onset and severity of the cavitation provide the means of preventing the cavitation from causing harmful effects such as deterioration of the hydraulic performance, damage to pump components and the pollution by vibration and noise. This paper presents a new approach to monitoring cavitation based on the measurement of instantaneous angular speed (IAS) of the pump. IAS is measured using a cheap shaft encoder and processed using order spectrum analysis. It has been found that the normalised amplitude at the third order of the rotational speed can be used as a primary monitoring feature to detect the onset of the cavitation and to quantify the severity of the cavitation. A secondary detection feature is also defined in the high frequency range. This makes the detection results more reliable.
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Gubran, Ahmed A., and Jyoti K. Sinha. "Comparison Between Long and Short Blade Vibration Using Shaft Instantaneous Angular Speed in Rotating Machine." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25904.

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The blade failure normally occurs as a result of blade cracking due to unforeseen operating conditions and variable loads. Therefore, the early detection of damage in the blades is critical to reduce machine down time, maintenance costs and to maintain overall safety. Earlier studies indicate that the shaft instantaneous angular speed (IAS) representing the shaft torsional vibration is a good approach for the blade vibration. Hence, the shaft IAS is extracted from the measured encoder data during machine run-up to understand the blade vibration. A number of experiments on an experimental rig with a bladed disk were conducted using 2 types of blades (long and short blades) with healthy but mistuned blades and with different faults simulation in the blades. The paper presents the experimental setup, simulation of blade faults, experiments conducted, observations and comparison of results between the long and short blades with and without faults.
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Hua, Jianxiang, and Yu Guo. "Fault Detection Based on Improved Cross-correlation Order Spectrum of Sun Gear Instantaneous Angular Speed Signal." In 2021 International Conference on Sensing, Measurement & Data Analytics in the era of Artificial Intelligence (ICSMD). IEEE, 2021. http://dx.doi.org/10.1109/icsmd53520.2021.9670815.

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Ni, Z., X. Wang, and J. Wang. "Modeling of instantaneous angular speed variation of large clearance cylindrical roller bearing with local defects in rolling element." In 1st International Conference on Mechanical System Dynamics (ICMSD 2022). Institution of Engineering and Technology, 2022. http://dx.doi.org/10.1049/icp.2022.1918.

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