振动分析师（ISO18436-2）四级能力矩阵 - 简介
本文的内容绝大多数来自：VCAT-II Vibration Analyst - Mobius Institute相关振动分析员培训招生彩页，特此致谢！内容整理参见：振动分析师四级能力矩阵 - 知乎。
CAT I 振动分析技术员
1.1角色画像
- Collect vibration data
- Validate that the data is good
- Begin to perform basic analysis
- Use the training and certification as the start of a new and rewarding career as a vibration analyst
1.2能力描述
- Maintenance practices • Reactive, preventive, condition-based, proactive • How to decide between them
- Condition monitoring • Why it works • Ultrasound, infrared, oil analysis, wear particle analysis, and electric motor testing
- Principals of vibration • Waveforms • Metrics: overall levels, RMS, Pk, Pk-to-Pk, and crest factor
- Introduction to vibration measurement • Vibration sensors: displacement, velocity, acceleration • Vibration units • Mounting: where and how • Naming conventions • Repeatability and quality • Vibration axes: V, H, A, R and T • What are “routes” and how do you create them? • Detecting and avoiding poor data
- An introduction to the time waveform
- An introduction to the spectrum • An introduction to forcing frequencies
- A brief introduction to phase Signal processing (just the absolute basics) • A quick tour of your analyzer settings • Fmax • Resolution • Spectral averaging
- Vibration analysis • The spectrum analysis process
- What is resonance - a quick introduction Diagnosing common fault conditions • Unbalance • Misalignment • Rolling element bearing failure • Looseness • Resonance
- Setting alarm limits
1.3学习要点
- Knowledge about condition monitoring, including a summary of the most common technologies
- Knowledge about reliability improvement
- How vibration analysis plays a key role in reliability improvement
- How machines work via the supplementary self-study “equipment knowledge” section of the manual
- The fundamentals of vibration: waveforms, spectra, and simple metrics (overall levels, RMS, peak, peak to peak, and crest factor)
- How to take dependable, repeatable, high-quality vibration readings
- About vibration sensors, and how and where to mount them
- The basics of the analysis process, primarily with vibration spectra
- The basics of the key analyzer settings: Fmax, resolution, and averaging
- The basics of setting alarm limits
- The common “failure modes” of machines and how to detect them, including rolling element bearing faults, unbalance, misalignment, looseness, and resonance
1.4培训样例
Duration: 30 hours, typically over four days
Format: • Live public course • Private on-site course • Virtual live online course • Video distance learning online course
Compliance: • Training: ISO 18436-2 • Certification: ISO 18436-2, ISO/IE 17024
Exam: • 2 hours • 60 multiple-choice questions • 70% passing grade • Can be taken online or in-person at the course
Certification requirements: • Training course completed • 6-months of practical vibration analysis work experience, verified by supervisor/manager • Pass the exam • Valid for 5 years
Pre-study: • Access to the Learning Zone upon registration and payment. For online distance learning, access to the learning platform for four months from registration and payment • Complete set of videos covering every topic • An excellent way to be prepared and get the most from the course
Post-study: • Continue accessing the Learning Zone for 4 months after completing your course. Plus, enjoy the option to upgrade to a 1-year Continued Education plan for extended learning • Continue learning for free on WWW.MOBIUSCONNECT.COM with online forums, webinars, tutorials, etc
CAT II 振动分析员
you will transition from being a person who is primarily capable of collecting data to a person who can diagnose faults on critical machinery, and in some cases, prevent or correct them.
2.1角色画像
- Collect vibration data
- Validate that the data is good
- Set up the analyzer for routine data collection and special tests
- Diagnose most of the common fault conditions
- Perform special tests to validate unbalance, misalignment, resonance, looseness, and other conditions
- Know how to perform precision shaft alignment and balancing
- Use the training and certification as the next step in a rewarding career as a vibration analyst
2.2能力描述
- Increase your knowledge on maintenance practices, condition monitoring, and the common condition monitoring technologies
- Increase your knowledge about data collection, testing techniques, sensor types, and so on
- Learn a great deal about signal processing and the settings of your vibration analyzer
- Increase your knowledge of spectrum analysis, time waveform analysis, and phase analysis
- Understand why phase analysis and time waveform analysis are both critical tools used by the vibration analyst
- Learn common failure modes and how to detect them, including unbalance, misalignment, looseness, resonance, pump/fan/compressor vane, and flow issues, cavitation, turbulence, gearbox failures, rolling element bearing failure, and more • Learn high-frequency bearing and gear fault detection techniques: demodulation, enveloping, shock pulse, PeakVue, Spike Energy, and others
- Be able to use spectra, phase readings, time waveforms, bump and impact tests, to test for
- looseness, resonance, and other conditions
- Learn precision shaft alignment and soft foot correction
- Learn single and two-plane balancing
- Learn the basics of setting alarm
2.3 学习要点
- Review of maintenance practices Review of condition monitoring technologies
- Principals of vibration • Complete review of basics • Waveform, spectrum (FFT), phase and orbits • Understanding signals: modulation, beating, sum/difference
- Data acquisition • Transducer types: Non-contact displacement Proximity probes, velocity sensors, and accelerometers • Transducer selection • Transducer mounting and natural frequency • Measurement point selection • Following routes, and test planning Common measurement errors
- Signal processing • Filters: Low pass, band pass, high pass, band stop • Sampling, aliasing, dynamic range • Resolution, Fmax, data collection time • Averaging: linear, overlap, peak hold, time synchronous • Windowing and leakage
- Vibration analysis • Spectrum analysis • Time waveform analysis (introduction) • Orbit analysis (introduction) • Phase analysis: bubble diagrams and ODS • Enveloping (demodulation), shock pulse, spike energy, PeakVue
- Fault analysis • Natural frequencies and resonances • Unbalance, eccentricity and bent shaft • Misalignment, cocked bearing and soft foot • Mechanical looseness • Rolling element bearing analysis • Analysis of induction motors • Analysis of gears • Analysis of belt-driven machines • Analysis of pumps, compressors, and fans
- Equipment testing and diagnostics • Impact testing and bump tests • Phase analysis
- Corrective action • General maintenance repair activities • Review of balancing process • Review of shaft alignment
- Setting alarm limits • Setting baselines • Setting alarms: band, envelope/mask, statistical
- Acceptance testing
- Review of relevant ISO standards
2.4培训样例
Duration: 38 hours, typically over five days
Format: • Live public course • Private on-site course • Virtual online course • Video distance learning online courses
Compliance: • Training: ISO 18436-2 • Certification: ISO 18436-2, ISO/IE 17024
Exam: • 3 hours • 100 multiple-choice questions • 70% passing grade • Can be taken online or in-person at the course
Certification requirements: • Training course completed • 18-months of practical vibration analysis work experience, verified by supervisor/manager • Pass the exam • Valid for 5 years
Pre-study: • Access to the Learning Zone upon registration and payment. For online distance learning, access to the learning platform four months from registration and payment • Complete set of videos covering every topic • An excellent way to be prepared and get the most from the course
Post-study: • Continue accessing the Learning Zone for 4 months after completing your course. Plus, enjoy the option to upgrade to a 1-year Continued Education plan for extended learning • Continue learning for free on WWW.MOBIUSCONNECT.COM with online forums, webinars, tutorials, etc.
CAT III 振动分析师
The key is that with the VCAT-III course, you will transition from being a vibration analyst who should be supervised to a person who is capable of running the program, being a senior consultant, solving difficult problems, and taking a leadership role.
3.1角色画像
- Have a minimum of 3 years of experience
- Have a senior role in the condition monitoring team
- Have others report to them to verify diagnoses
- Be responsible for the most complex fault conditions (with the possible exception of sleeve bearing, flexible rotor machines)
- Need to perform complex tests to validate fault conditions (e.g., resonance) and find a solution
- Want to be a leader of the vibration team or take a leading role in diagnosing faults and making repair recommendations
- Want to understand all data collector options, special test capabilities, all analysis tools and understand the widest range of fault conditions
- Seek to become certified to international standards (ISO-18436) by an accredited certification body
- Want to understand all condition monitoring technologies, how and when to apply them
- Want to understand machine dynamics (natural frequencies, resonance, ODS), how to perform resonance testing and how to correct resonance problems
- Use the training and certification as the next step in a rewarding career as a vibration analyst
3.2能力描述
- Signal processing • Filters: Low pass, band pass, high pass, band stop • Sampling, aliasing, dynamic range • Signal-to-noise ration • Resolution, Fmax, data collection time • Averaging: linear, overlap, peak hold, time synchronous • Windowing and leakage • Order tracking • Cross-channel measurements • Correlation and coherence
- Time waveform analysis • Collecting data - ensuring you have the correct setup • When should you use time waveform analysis? • Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions
- Phase analysis • Collecting data • Bubble diagrams • Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions
- Dynamics (natural frequencies and resonance) • Natural frequencies and resonances • Mass, stiffness, and damping • SDOF and MDOF
- Testing for natural frequencies • Run-up coast down tests • Bode plots and Nyquist (polar) plots • Impact and bump tests
- Operating Deflection Shape (ODS) analysis • Can we prove the existence of a natural frequency? • Visualizing vibration • Setting up the job • Collecting phase readings correctly • Interpreting the deflection shape • Using Motion Amplification
- Modal analysis and intro to FEA • How does modal analysis differ from ODS? • How does Finite Element Analysis (FEA) differ from modal analysis • A quick review of the modal testing process
- Correcting resonances • The effect of mass and stiffness • Beware of nodal points • Adding damping • A “trial and error” approach • A “scientific” approach • Isolation • Tuned absorbers and tuned mass dampers
- Rolling element bearing fault detection • Why do bearings fall? • Cocked bearing, sliding on the shaft or inside the housing, looseness • EDM and DC motors and VFDs • Bearing frequencies and what to do when you don’t have all the details • The four stages of bearing degradation • Ultrasound • High-frequency detection techniques • Shock Pulse, Spike Energy, Peak vue, and other techniques • Demodulation/enveloping • Selecting the correct filter settings • Spectrum analysis • Time waveform analysis • Low-speed bearings
- Journal bearing fault detection • What are journal bearings? • Measuring displacement • Introduction to orbit plots • Using your analyzer to acquire orbit plots • Introduction to centerline diagrams • Eccentricity ratio • Glitch removal • How the orbit changes with pre-load, unbalance, misalignment, instabilities, oil whir and whip
- Electric motor testing • How do motors work? • Diagnosing a range of fault conditions: eccentric rotor, eccentric stator, soft foot, phasing, broken rotor bars, rotor bar, and stator slot pass frequencies • Motor current analysis
- Pumps, fans, and compressors • Unique fault conditions • Flow turbulence, recirculation, cavitation
- Gearbox fault detection • Spectrum analysis versus time waveform analysis • Wear particle analysis • Gearmesh, gear assembly phase frequency (and common factors) •Tooth load, broken teeth, gear eccentricity and misalignment, backlash and more
- Corrective action • General maintenance repair activities • Review of the balancing process and ISO balance grades • Review of shaft alignment procedures
- Running a successful condition monitoring program • Defining the program • Setting baselines • Setting alarms: band, envelope/mask, statistical • Setting goals and expectations (avoiding common problems) • Report generation • Reporting success stories
- Review of relevant ISO standards
3.3学习要点
- Review of condition monitoring technologies
- Signal processing and data acquisition
- Time waveform analysis
- Phase analysis
- Dynamics (natural frequencies and resonance)
- Testing for natural frequencies
- Operating Deflection Shape (ODS) analysis
- Modal analysis and introduction to FEA
- Correcting resonances
- Rolling element bearing fault detection
- Journal bearing fault detection
- Electric motor testing
- Pumps, fans, and compressors
- Gearbox fault detection
- Corrective action
- Acceptance testing
3.4培训样例
Duration: 38 hours, typically over five days
Format: • Live public course • Private on-site course • Virtual online course • Video distance learning online courses
Compliance: • Training: ISO 18436-2 • Certification: ISO 18436-2, ISO/IE 17024
Exam: • 4 hours • 100 multiple-choice questions • 70% passing grade • Can be taken online or in-person at the course
Certification requirements: • Training course completed • 36-months of practical vibration analysis work experience, verified by supervisor/manager • Have previously been certified to VCAT-II by a MIBoC-approved certification body • Pass the exam • Valid for 5 years
Pre-study: • Access to the “Learning Zone” upon registration and payment • Complete set of videos covering every topic • An excellent way to be prepared and get the most from the course
Post-study: • Continue accessing the Learning Zone for 4 months after completing your course. Plus, enjoy the option to upgrade to a 1-year Continued Education plan for extended learning • Continue learning for free on WWW.MOBIUSCONNECT.COM with online forums, webinars, tutorials, etc.
CAT IV 振动分析领域专家
The key is that with the VCAT-IV course, you will transition from being a very good vibration analyst to a vibration super-hero!
4.1 角色画像
- Have a minimum of 5 years of experience
- Have a senior role in the condition monitoring team, but you want to go beyond and truly reach the peak of the vibration world
- Be able to understand the measurements associated with critical turbomachinery and other fluid-film bearing machines
- Be able to do everything the Category III can do
4.3 能力描述
- Principles of vibration • Vectors, modulation • Phase • Natural frequency, resonance, critical speeds • Force, response, damping, stiffness • Instabilities, non-linear systems • Torsional vibration • Instrumentation • Proximity probe operation, conventions, glitch removal • Shaft and casing measurements
- Signal processing • RMS/peak detection • Analog/digital conversion • Analog sampling, digital sampling • FFT computation • Filters: low pass, high pass, band pass, tracking • Anti-aliasing • Bandwidth, resolution • Noise reduction • Averaging: linear, synchronous time, exponential • Dynamic range • Signal-to-noise ratio • Spectral maps
- Fault analysis • Spectrum analysis, harmonics, sidebands • Time waveform analysis • Orbit analysis • Shaft centerline analysis • Transient analysis • Unbalance, bent shaft, cracked shaft, eccentricity, rubs, instabilities
- Fault analysis (continued) • Resonance and critical speeds • Turbomachinery
- Phase analysis • Transient analysis • Enveloping • Electric motor defects • Flow-induced vibration, aerodynamics, and liquids • General fault recognition
- Rotor/bearing dynamics • Rotor/bearing dynamics • Rotor characteristics • Rotor modeling (rotor, wheels, bearings, aerodynamic effects) • Bearing characteristics (fluid film bearings, housing, and supports, seals, couplings)
- Corrective action • Flow control • Isolation and damping • Resonance control • Low and high-speed shop balancing • Field balancing (single plane, two plane, static/couple, flexible rotor)
- Equipment testing and diagnostics • Impact testing • Forced response testing • Transient analysis • Transfer functions • Damping evaluation • Cross channel phase, coherence • Operating deflection shapes • Modal analysis
- Fault severity determination • Spectrum analysis • Time waveform analysis, orbit analysis • Severity charts, graphs and formula
- Reference standards • ISO • IEC • Relevant national standards
4.3 学习要点
- Advanced signal processing
- Cross channel measurements
- Dynamics (mass/stiffness/damping, natural frequencies, modes)
- Resonance testing (run-up/coast down tests, impact tests, ODS, modal analysis)
- Corrective action (flow control, resonance correction, isolation, and damping)
- Proximity probe and casing measurements
- Orbit and centerline plot analysis
- Rotor dynamics (natural frequencies, modeling)
- Journal bearings (design, fluid film instabilities)
- Flexible rotor balancing
- Torsional vibration
4.4 培训样例
Duration: 64 hours total: Part 1: Online Distance Learning. You will have access to online course videos and study materials Part 2: 5-day in-person course with optional exam
Compliance: • Training: ISO 18436-2 • Certification: ISO 18436-2, ISO/IEC 17024
Exam: • 5 hours • 60 multiple-choice questions, with calculations required • 70% passing grade • Can be taken online or in-person at the course
Certification requirements: • Training course completed • 60 months of practical vibration analysis work experience, verified by supervisor/manager. • Have previously been certified to VCAT-III by a MIBoC approved certification body • Pass the exam • Valid for 5 years
Post-study: • Continue accessing the Learning Zone for 4 months after completing your course. Plus, enjoy the option to upgrade to a 1-Year Continued Education