Výsledky vyhledávání - "Aly El-Shafei"

Control of a smart electro-magnetic actuator journal integrated bearing to a common equilibrium position: A simulation study

Autor: A. S. Dimitri, Aly El-Shafei, Eric Maslen, Mohamed L. Shaltout

Publikováno v: Mechanical Systems and Signal Processing. 154:107556

The integration of plain journal bearings (JBs) and active magnetic bearings (AMBs) has previously been introduced as an innovative bearing concept in rotating machinery, known as smart electro-magnetic actuator journal integrated bearings (SEMAJIBs)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4e77b5451bfb8eb2a5fbb864f5a8afee
https://doi.org/10.1016/j.ymssp.2020.107556

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Machine Diagnosis as a Standardized Approach

Autor: Aly El-Shafei

Publikováno v: Mechanisms and Machine Science ISBN: 9783319992679

This paper presents the approach adopted by ISO in the ISO 13373 series for machinery diagnostics. A step-by-step flow chart approach with fault tables and examples has been adopted in the ISO 13373 series. The paper discusses the diagnosis of common

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c86328d989c5d024c7b5da9605b89f9
https://doi.org/10.1007/978-3-319-99268-6_15

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SEMAJIB: A Versatile High Performance Smart Bearing

Autor: Aly El-Shafei

Publikováno v: Mechanisms and Machine Science ISBN: 9783319992617

The experimental development of the Smart Electro-Magnetic Actuator Journal Integrated Bearing (SEMAJIB) is presented in this paper. The SEMAJIB is a smart high performance integrated bearing that combines a fluid film bearing (FFB) with an electro-m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8246b7e9719df9a3b17335dca5abfb6c
https://doi.org/10.1007/978-3-319-99262-4_27

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Magnetic actuator control of oil whip instability in bearings

Autor: Jarir Mahfoud, Amr A. Adly, Aly El-Shafei, A. S. Dimitri

Publikováno v: IEEE Transactions on Magnetics
IEEE Transactions on Magnetics, Institute of Electrical and Electronics Engineers, 2015, 51 (11), pp.1-4. ⟨10.1109/TMAG.2015.2456030⟩

Magnetic actuators are successfully used in the control of rotating machinery using feedback to eliminate the undesired vibration. Control algorithms can be implemented through the magnetic forces applied using the magnetic actuator, which are contro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6002f16e1041659b018127046f058258
https://doi.org/10.1109/intmag.2015.7156798

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Test Rig Characterization and Dynamic Testing of a Smart Electro-Magnetic Actuator Journal Integrated Bearing

Autor: Aly El-Shafei, A. S. Dimitri, M. El-Hakim, T. Saqr

Publikováno v: Proceedings of the 9th IFToMM International Conference on Rotor Dynamics ISBN: 9783319065892

This paper discusses the development of a novel bearing the Smart Electro-Magnetic Actuator Journal Integrated Bearing (SEMAJIB). The SEMAJIB is essentially a journal bearing with an electro-magnetic actuator all flooded in oil. The basic principle i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6817daec19d7fe1059fb1c1c2e85fda9
https://doi.org/10.1007/978-3-319-06590-8_94

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Neural Network and Fuzzy Logic Diagnostics of 1x Faults in Rotating Machinery

Autor: Yasser Zeyada, T. A. F. Hassan, A. K. Soliman, Aly El-Shafei, N. Rieger

Publikováno v: Journal of Engineering for Gas Turbines and Power. 129:703-710

In this paper, the application of neural networks and fuzzy logic to the diagnosis of faults in rotating machinery is investigated. The learning-vector-quantization (LVQ) neural network is applied in series and in parallel to a fuzzy inference engine

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0891343dac1ede736c07f44a4ffcad59
https://doi.org/10.1115/1.2227417

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Rotor Balancing Without Trial Weights

Autor: Aly El-Shafei, A. S. El-Kabbany, A. A. Younan

Publikováno v: Journal of Engineering for Gas Turbines and Power. 126:604-609

The traditional balancing methods using trial or calibration weights are quite effective, yet too many trials may result in a lengthy balancing process. It had been suggested in the literature that it is possible to balance flexible rotors without th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9198d12b5b30aeb2c8acef961330c83a
https://doi.org/10.1115/1.1762903

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Some Experiments on Oil Whirl and Oil Whip

Autor: Sameh Tawfick, Aly El-Shafei, G. M. Aziz, M. S. Raafat

Publikováno v: Journal of Engineering for Gas Turbines and Power. 129:144-153

The oil whirl and oil whip phenomena are well known since the early twentieth century. However, there is a lot of confusion on the parameters that affect the onset of instability. In this study, we investigate the onset of instability on a flexible r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c008d4b34e5356da672e9573ac87dc07
https://doi.org/10.1115/1.2181185

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[Untitled]

Autor: Aly El-Shafei

Publikováno v: Tribology Letters. 14:111-121

This paper presents a complete perturbation solution in the eccentricity ratio for Reynolds' equation, for finite squeeze-film dampers executing linear motion. Orders of the perturbed solution are presented for the pressure and velocity fields. This

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::06f26cb2ff600815df6b29c214e68fe4
https://doi.org/10.1023/a:1021756304514

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