352-0552/01 – Technical Diagnostics (TD)
| Gurantor department | Department of Control Systems and Instrumentation | Credits | 5 |
| Subject guarantor | doc. Ing. Jaromír Škuta, Ph.D. | Subject version guarantor | doc. Ing. Jaromír Škuta, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2013/2014 | Year of cancellation | |
| Intended for the faculties | FS | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
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.
Teaching methods
Lectures
Tutorials
Project work
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.
Compulsory literature:
Recommended literature:
TŮMA, J. Vehicle gearbox noise and vibration, Wiley, 2014.
Additional study materials
Way of continuous check of knowledge in the course of semester
E-learning
Other requirements
Students have to prepare project.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
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.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction