| Course Unit Code | 352-0552/01 |
|---|
| Number of ECTS Credits Allocated | 5 ECTS credits |
|---|
| Type of Course Unit * | Compulsory |
|---|
| Level of Course Unit * | Second Cycle |
|---|
| Year of Study * | Second Year |
|---|
| Semester when the Course Unit is delivered | Winter Semester |
|---|
| Mode of Delivery | Face-to-face |
|---|
| Language of Instruction | Czech |
|---|
| Prerequisites and Co-Requisites | Course succeeds to compulsory courses of previous semester |
|---|
| Name of Lecturer(s) | Personal ID | Name |
|---|
| SKU51 | doc. Ing. Jaromír Škuta, Ph.D. |
| SOF009 | Ing. Pavel Šofer, Ph.D. |
| Summary |
|---|
| The lectures cover the properties of A/D converters, sensors for sound and vibration measurements and diagnostics, as well as giving fundamentals of the technique of measurement noise, vibration and rotation with the spectral analysis in the diagnosis of journal and roller bearings, gear units and internal combustion engines. Other objectives is to describe the basics of balancing rotors, evaluation of operating deflection shapes and modal analysis of mechanical components and structures. Understanding the methods used in the diagnosis will allow analysis of measurements in industrial applications. The aim is to achieve self-determination of the measured data synthesis, resulting in the evaluation of state machines. |
| Learning Outcomes of the Course Unit |
|---|
| Lectures will prepare mechanical engineers to practice in the field of machine diagnostics and testing of new products. The students obtain knowledge which can be applied also in the field of technical inspection and quality control. |
| Course Contents |
|---|
1. Vibration and acoustic diagnostics, special sensors, signal processing methods.
2. A/D converters (successive approximation, sigma-delta and flash). Antialiasing filters.
3. Speed sensor for diagnostics. Optical probes. Incremental angle sensors (encoders). Laser sensor torsional vibrometer.
4. Vibration transducers (sensors for speed and acceleration) and dynamic forces. Piezoelectric sensors. Laser vibration sensor. Calibration
5. Measuring microphones. Probe for measuring sound intensity. Frequency weighting A, B, C, decibels scale. Sound level meter. Calibration pistonphone.
6. Diagnosis of rolling bearings. Measurement in quality control of production and in operational diagnostics. Frequency of defects and the importance of using the envelope signal.
7. Diagnosis of rotor systems with sliding bearings. Proximity probes. Measurement of orbits, full spectrum of vibration excited by flow of lubricant (whirl and whip)
8. Diagnostics of gears. Calculation of toothmeshing frequency. Planetary gearboxes. Measurement noise, vibration and transmission error of a gear train.
9. Diagnosis of internal combustion engines, measuring uniformity of rotation.
10. Device for measuring frequency responses. Principle of a vibrator (shaker). Hammers for modal analysis.
11. Measurement of operational deflection shapes, and their use for diagnosis of mechanical structures.
12. Modal analysis of mechanical structures .
13. Evaluation of the Wohler curve (stress-number). , measurement and evaluation methods for loading spectra based on rain-flow. Application for the lifetime prediction.
|
| Recommended or Required Reading |
|---|
| Required Reading: |
|---|
CROCKER, M. (Editor) Handbook of noise and vibration control. New York: Wiley, 2007. ISBN 978-0-471-39599-7.
|
TŮMA, J. Diagnostika strojů, 1. vyd. Ostrava : Skripta VŠB - TU Ostrava, 2009. 138 s. ISBN 978-80-248-2116-0.
TŮMA, J.: Zpracovaní signálů získaných z mechanických systémů. Sdělovací technika Praha, 1997.
|
| Recommended Reading: |
|---|
| TŮMA, J. Vehicle gearbox noise and vibration, Wiley, 2014. |
| TŮMA, J. Signal processing. Skripta VŠB TU, FS, 2009, ISBN 978-80-248-2114-6. (http://fs1.vsb.cz/~tum52/Skripta/) |
| Planned learning activities and teaching methods |
|---|
| Lectures, Tutorials, Project work |
| Assesment methods and criteria |
|---|
| Task Title | Task Type | Maximum Number of Points
(Act. for Subtasks) | Minimum Number of Points for Task Passing |
|---|
| Exercises evaluation and Examination | Credit and Examination | 100 (100) | 51 |
| Exercises evaluation | Credit | 35 | 21 |
| Examination | Examination | 65 | 16 |