• Motor Vehicles, Semester 3, position 4

The aim of the course is to provide a comprehensive insight into the issues of system effectiveness, primarily in the area of (analysis and design) reliability of technical systems (vehicles).

Upon successful completion of this course, students should be able to: -explain the concepts of system effectiveness, reliability and failure; -analyze the obtained data on failure times; -apply basic laws of probability and statistics to calculate the reliability of an element; -obtain the theoretical density distribution and reliability function based on empirical data on element failure; -determine the reliability of a complex system based on the reliability of the elements that make up the complex system; -form a failure tree of a technical system and analyze it; -apply the calculation of machine elements based on reliability.

Defining requirements for effectiveness, i.e. reliability and availability of system and system elements. System. Fundamentals of probability theory and statistics and their application in reliability analysis and design. Defining element and system failures. Determining empirical and theoretical characteristics of system and system elements reliability (histogram, polygon, failure intensity, frequency function, mean value, distribution laws (Weibull, normal, exponential, binomial, Poisson), confidence tests, confidence interval). Determining block diagrams of reliability of simple and complex systems (vehicles). Failure tree analysis, analysis of failure modes, effects and criticality, integral system approach. Designing vehicle elements for a given level of reliability, relationships between working and critical loads, selection of failure intensity for specific operating and environmental conditions.

Failure event. Fundamentals of probability theory and statistics. Complex probability. Practical determination of empirical and theoretical characteristics of the reliability of system elements and systems (histogram, polygon, failure intensity, frequency function, mean value, distribution laws (Weibull). Determination of reliability characteristics. Reliability block diagram - connections of elements in the system. Determination of the reliability function of systems (simple and complex). Reliability design. Design based on working and critical loads. Reliability allocation. Failure tree analysis, Analysis of failure modes, effects and criticality. 1. Calculation tasks - audit exercises. 2. Calculation tasks - independent tasks.

No attendance requirements

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Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

Auditory exercises: 15
Laboratory exercises: 0
Calculation tasks: 15
Seminar paper: 0
Project: 0
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 7
Review and grading of lab reports: 0
Review and grading of seminar papers: 0
Review and grading of the project: 0
Test: 0
Test: 0
Final exam: 8

Activity during lectures: 0
Test/test: 0
Laboratory practice: 0
Calculation tasks: 40
Seminar paper: 0
Project: 0
Final exam: 60
Requirement for taking the exam (required number of points): 20

J. Todorovic, D. Zelenovic: Effectivenessof Machanical Systems, Naucna knjiga, Belgrade, 1990.; G. Ivanovic, D. Stanivukovic, I. Beker: reliability of technical systems, FTN, Novi Sad, 2010.