Course detail

Reliability in Electrical Engineering

FEKT-BPC-SPEAcad. year: 2023/2024

The course deals with the issue of reliability of components and systems and their backups. Students will learn to use statistics in reliability, with calculations of reliability. It will get acquainted with the issue of international standardization and implementation of the quality system to ISO 9000. Another part of the course is devoted to the kinetics of processes of aging and degradation of materials, interaction between the conditions of exploitation and electrotechnical equipment, diagnostics of materials, elements and systems.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

Ing. Helena Polsterová, CSc.

Department

Department of Electrical and Electronic Technology (UETE)

Entry knowledge

The subject knowledge on the secondary school level is required.

Rules for evaluation and completion of the course

upto 20 points from seminars (student will receive these points by the individual work in the field of reliability and its presentation).
upto 80 pointsfrom written examination.
The test focuses into the issues of reliability discussed in lectures and seminars.

The content and forms of instruction in the evaluated course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.

Aims

The aim of the subject is to make students familiar with the problems of reliability of electrotechnical products and with the bases of creating reserves.
The student is able to:
- define the basic concepts of reliability,
- explain ways to backup systems,
- describe the stress involved in the operation of electrical equipment and subsequent aging electrical systems,
- explain the methods of reliability,
- calculate selected indicators of system reliability,
- can interpret basic reliability models.

Study aids

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Polsterová, H. Spolehlivost v elektrotechnice. Elektronická skripta. (CS)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme BPC-MET Bachelor's 3 year of study, summer semester, compulsory-optional

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

Ing. Helena Polsterová, CSc.

Syllabus

Introdiction to the problems.Basics concepts.
Reliability of elements and systems.Classification of systems.Classification of failures according to their reasons of origin, time course and stage of the failure.
Bases of statistics.Distribution of random variable and their use in reliability.
Reliability of expendable.Probability of trouble-free operation.Probability of failures.Density of failures, intensity of failures.Mean time of trouble-free operation.Relations between characteristics of reliability.
Reliability of systems.Creating reserves.Active and passive creating reserves.
Standardization.Statistics at checking of quality of production processes.International standardization.
Introduction of ISO 9000 quality system.
Defects in initial materials and their influence on final properties of elements.Defects iniciated by production technology.
Mechanisms and kinetics of processes of ageing and depreciation.Interaction between the conditions of exploitation and electrotechnical equipment. Complex,partial and model stresses and their relation to depreciation.
Temperature ageing. Effect of humidity.Ageing by electric field.Mechanical depreciation.Effect of chemically agresive environment.
Corrosive depreciation.Kinetics of degradation processes at affecting degradation factors.
Diagnostics of materials,elements and systems.Destructive,potentially destructive and non-destructive methods.
Structural methods.Electrical methods.Other physical methods.

Exercise in computer lab

20 hod., compulsory

Teacher / Lecturer

Ing. Helena Polsterová, CSc.

Syllabus

Introduction.Organization of practise.
Mathematical statistics.Distribution of random variable.Normal distribution.
Exponential distribution.Weibull's distribution.
Reliability characteristics.
Calculations and courses of reliability characteristics.
Reliability models.General calculations.
Calculations of serial reliability models.
Calculations of parallel reliability models.
Estimate of lifetime at heat-ageing of insulations

Laboratory exercise

6 hod., compulsory

Teacher / Lecturer

Ing. Helena Polsterová, CSc.

Syllabus

Diagnostic measurement of insulating materials.
Measurement and comparison of properties of non-aged and aged objects.