AMWS1: Why Vibration Analysts must use Time Waveforms & Phase (Motion) Analysis for Enhanced Diagnostics and Root Cause Workshop

Dean Whittle, Managing Director, Reliability Maintenance Solutions Stuart Walker, Reliability Engineer, Reliability Maintenance Solutions


The vibration spectrum is an excellent tool for detecting and diagnosing faults in rotating machinery. But in truth it only tells half the picture. The time waveform and phase readings complete the picture, and it is essential that all vibration analysts understand how to correctly measure and interpret this data.

This presentation describes a series of fault conditions that can only be accurately diagnosed with time waveform analysis and/or phase analysis. We explore how to ensure that the time waveform is measured correctly so that useful information can be revealed – this is the place where most analysts make mistakes. We’ll present real-world case study examples where time waveform analysis reveals a new world for the analyst in terms of detectability, analysis and diagnostics. We then go on to demonstrate how easy phase readings can be measured with a single-channel analyser, a two channel-analyser, and a strobe. We then move on to describing a series of fault conditions that can be diagnosed and confirmed with phase analysis techniques. Finally, we look at how traditional VA phase techniques can be enhanced by conducting more detailed measurements (via Operating Deflect Shape and Motion Amplification) that allows us to truly visualize how the machine/structure/system is moving, thereby providing visual evidence for root cause analysis of machine failure modes.

This workshop is for all levels of experience regardless of skill set and is presented utilising 3D animations, software simulators and visual aids that will make it understandable to all.

Bio - Dean Whittle

Mr. Dean Whittle is the founder and managing director of Reliability Maintenance Solutions (RMS) Ltd. based in the United Kingdom. During Mr. Whittle’s more than 40-year career he has held various roles in electro/mechanical engineering ranging a five-year apprenticeship through various shop floor/field services roles to district manager for a world-leading supplier of Reliability-Based and Condition-Based Maintenance products and services. During the past twenty-five years he has been committed to implementing plant reliability and condition monitoring improvement programs throughout UK industry; covering power, paper, petro-chemical, pharmaceutical, automotive, quarries, film/plastic, food, electronic, service and engineering manufacturing industries. Mr. Whittle shares his expertise as an approved trainer for both the British Institute of Non-Destructive Testing (BINDT) and Mobius Institute ISO-18436 accreditation programmes, and as a speaker at a number of conferences.

Additionally, Mr. Whittle is an active member in a number of accredited institutes and committees:

  • ISO TC108 / SC5 Condition Monitoring & Diagnostics of Machine Systems
    Mobius Institute Board of Certification (MIBoC) Technical Committee
    Mobius Institute Vibration Analysis Technical Committee Chair
    Mobius Institute Asset Reliability Practitioner Technical Committee
    The British Institute of NDT Council Member
    The British Institute of NDT Condition Monitoring Technical Committee
    The British Institute of NDT Vibration Analysis Working Group
    The British Institute of NDT Ultrasound Working Group
    British Standards Institute – BSi Technical sub-committee GME/21/5 – Mechanical vibration and shock and Condition monitoring – Vibration of machines
    British Standards Institute – BSi Technical sub-committee GME/21/7 Mechanical vibration and shock and Condition monitoring

Bio - Stuart Walker

Stuart has worked in the Condition Monitoring and Reliability sector for the last 23 years. He started his career working for Dupont as a Mechanical and Production Technician after completing a four year apprenticeship. It was here he was introduced to Condition Based Monitoring and setup a successful program at one of DuPont’s UK sites. He utilized technology’s such as Vibration analysis, Oil Analysis and IR Thermography moving the site from a time based maintenance strategy to a predictive and proactive one.  Stuart then worked for a Reliability Consultant company for a number of years implementing and running a number of other successful CBM programs across the UK.
In 1999, Stuart setup Reliability Maintenance Solutions Ltd with his colleague Dean Whittle. Together they have successfully grown the company over the last 20 years. RMS provides reliability consultancy, training, service, and products to a number blue chip companies across the UK, Europe and Middle East. Stuart has worked in many industry sectors including Oil & Gas, Petrochemical, Power and Paper. He is currently working on projects introducing and implementing the new Motion Amplification Technology within RMS and across a wide range of Industries at home and abroad.