Nader Sawalhi

Research Associate

Research Interests :

• Machine condition monitoring.
• Vibration Signal processing.
• Diagnostics and Prognostics of machines.

Qualifications:

Employment:

Awards:

• Jordanian Ministry of Education scholarship for the Bachelor degree, 15th July. 1993
• Vibration Analysis Scholarship for PhD, Defence Science and Technology Organization (DSTO), 13th Mar. 2003.

Professional Societies:

• Jordanian Engineering Association (1997- current).
• Eligible for the membership of Institution of Engineers, Australia.
• Australian Acoustical society (student membership).

Selected Publications:

Books:

• N. Sawalhi, “Vibrations of spalled rolling element bearings, diagnostics, prognostics and dynamic simulations”, VDM Verlag, 29th May (2009). ISBN: 3639152417

Journal Papers:

• N. Sawalhi, R.B. Randall and H. Endo, The enhancement of fault detection and diagnosis in rolling element bearings using minimum entropy deconvolution combined with spectral kurtosis, Mechanical Systems and Signal Processing, 21(6) pp. 2616-2633 August (2007).
• N. Sawalhi, R.B. Randall, Simulating gear and bearing interactions in the presence of faults, Mechanical Systems and Signal Processing (2008), doi:10.1016/j.ymssp.2007.12.001
• N. Sawalhi, R.B. Randall, Simulating gear and bearing interactions in the presence of faults... Mechanical Systems and Signal Processing (2008), doi:10.1016/j.ymssp.2007.12.002
• N. Sawalhi and R.B. Randall, Helicopter Gearbox Bearing Blind Fault Identification Using a Range of Analysis Techniques, Australian Journal of Mechanical Engineering, Vol. 5, No. 2, August (2008).

Conference Papers:

• N. Sawalhi and R.B. Randall, The Application of Spectral Kurtosis to Bearing Diagnostics, ACOUSTICS conference, Gold Coast, Australia, November (2004).
• N. Sawalhi and R.B. Randall, Spectral Kurtosis Optimization for Rolling Element Bearings, ISSPA conference, Sydney, Australia, August (2005).
• N. Sawalhi and R.B. Randall, Helicopter Gearbox Bearing Blind Fault Identification Using a Range of Analysis Techniques, paper presented at the World Congress on Engineering Asset Management (WCEAM), Gold Coast, Australia, July (2006).
• N Sawalhi, R.B. Randall and H.Endo, Simulating gear and bearing interactions in the presence of faults, paper submitted to the 7th IFToMM conference on rotor dynamics, Vienna, September (2006).
• N. Sawalhi and R.B. Randall, “Semi-automated Bearing Diagnostics – Three Case Studies”. Paper presented at Comadem conference, Portugal, June (2007).
• N. Sawalhi and R.B. Randall, “A combined lumped mass parameter and finite element model of a single stage gearbox for bearing fault simulation” paper presented at the 21st International Congress and Exhibition on Condition Monitoring and Diagnostic Engineering Management, Prague, Czech Republic 11 – 13 June (2008).
• N. Sawalhi and R.B. Randall, “Localised fault diagnosis in rolling element bearings in gearboxes”, paper presented at the Fifth International Conference on Condition Monitoring and Machinery Failure Prevention Technologies, Edinburgh, 15-18 July (2008).
• N. Sawalhi and R.B. Randall, “Improved simulation of faults in rolling element bearings in Gearboxes” paper presented at the 9th International Conference on Vibrations in Rotating Machinery, 8-10 September, UK (2008).
• N. Sawalhi and R.B. Randall, “Novel Signal Processing Techniques to aid Bearing Prognostics”, paper presented at the first International Conference on Prognostics and Health Management, Denver, 6-11 October (2008).
• N. Sawalhi and R.B. Randall, “Effects of limiting the bandwidth of the vibration signal on bearing fault detection and diagnosis using state of the art techniques”, Paper presented at the sixth DSTO international conference on Health and Usage Monitoring, Melbourne, 10-12 March (2009).
• N. Sawalhi and R.B. Randall, “Tracking of spall size in rolling element bearings”, paper presented at the sixth International Conference on Condition Monitoring and Machinery Failure Prevention Technologies, Dublin, 23-25 June (2009).