Course detail

Machine Design - Mechanisms

FSI-6KMAcad. year: 2014/2015

During the lectures, we familiarize ourselves with mechanisms and drives of the contemporary machines. We will analyze their principles, describe their design and application. The most common kinematic and hydraulic mechanisms will be introduced as well as an electric and internal combustion engines. Attention is also paid to the microelectromechanical systems and renewable energy engines. We will discuss the application of mechanisms in various engineering branches. For example, you will learn about powerful engines for motorsport, design of high-speed cams, unconventional transmission design or about applications of universal-joint shafts.

We will deal with two practically oriented semestral projects during the practicals. At first, we will analyze the kinematic and dynamic parameters of the 11 kW serial combustion engine. Assessment of the internal loads in the crank mechanism is result of the analysis process. Understanding of such loads is essential for the design of the crank mechanism internal parts like the connecting rod or crankshaft. We will deal with analysis of the kinematic quantities of the cam mechanism afterwards. We will focus particularly on the analysis of the maximum acceleration values related to the various design of cams. Measuring of the combustion engine operational parameters and measuring of the cam displacement diagram will be conducted within laboratory practicals.

Language of instruction

Czech

Number of ECTS credits

Mode of study

Not applicable.

Guarantor

prof. Ing. Martin Hartl, Ph.D.

Department

Institute of Machine and Industrial Design (ÚK)

Learning outcomes of the course unit

You gain knowledge of the principle, construction and use of basic types of drive mechanisms and machines. Become familiarized with creation of analytical computational models in the PTC Mathcad. You will improve yourself in application of experimental, analytical and simulation methods to practical problems. Gain ability to use acquired knowledge creatively to design new machines and equipment. Your knowledge gained in previous mechanical design courses will be significantly extended and improved. You can apply acquired knowledge in all engineering fields which require comprehensive knowledge of machines and their internal components such as mechanical design, engineering analysis and control of machines and mechanisms.

Prerequisites

Knowledge of kinematics (kinematic analysis of mechanisms), dynamics (multibody dynamics, balancing), machine design (fasteners, gears, clutches, flywheels) at the level of the Bachelor's degree programme aimed on mechanical engineering.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Practicals are focused on application of knowledge acquired through lectures. Practicals are supplemented by work in the laboratory.

Assesment methods and criteria linked to learning outcomes

Graded credit course requirements:
Elaborated semestral projects: The minimum number of points needed for the acceptance of each semestral project is 25 from 50 possible. Points can be earned as follows:

1. Student activity in tutorials. Teachers discuss solutions with students through tutorials to gain an overview of the student's work during the semester.
2. Elaboration and submission of semestral projects on schedule set by the teacher. The complete project consists of calculation report created in PTC Mathcad software, including assignment, input parameters, figures and graphs.
3. The defense of semestral projects through discussion with the teacher. Student must prove his knowledge about topic.

Provided that student does not fulfil the requirements for the semestral project acceptance, he is entitled to have a maximum of one additional project defense. The date of defense is set by the teacher, usually during the examination period.

The final score of the whole course consists of the total number of points earned from successful semestral projects. The minimum required score is 50 points out of the maximum 100 points. The final score determines the grade according to ECTS.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The course goal is to provide an overview of modern mechanisms and driving machines and their practical use. Methods of analytical modeling of mechanisms and the basics of machines measuring are introduced.

This course is compulsory-optional in 3rd year of general bachelor's degree program. Its choice is recommended for all students who are oriented towards solving of various mechanical design problems and who are considering branches like M-ADI, M-AIR, M-ENI, M-KSI, M-FIN, M-MET, M-PRI, or M-VSR for their master study program.

Specification of controlled education, way of implementation and compensation for absences

Attendance at lectures is recommended, attendance at seminars is required - a maximum of two excused absences per semester are tolerated. Lectures provided by team of teachers of the Institute of Machine and Industrial Design are available as the electronic previews in the Moodle system. The practicals take the form of semestral projects and laboratory exercises. It is possible to use both private notebooks and computers in the classroom (WiFi available) during tutorials. The PTC Mathcad software is required for elaboration of semestral projects.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

NORTON, Robert L. Design of machinery: An introduction to the synthesis and analysis of mechanisms and machines. 5th ed. New York: McGraw-Hill, 2011. ISBN 00-774-2171-X. (EN)

Recommended reading

WILSON, Charles E. a Peter J. SADLER. Kinematics and dynamics of machinery. 3rd ed. Upper Saddle River: Pearson Education International Inc., 2003. ISBN 02-013-5099-8.

Classification of course in study plans

  • Programme B2341-3 Bachelor's

    branch B-STI , 3 year of study, summer semester, compulsory-optional
    branch B-SSZ , 3 year of study, summer semester, compulsory

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

doc. Ing. Ivan Mazůrek, CSc.
doc. Ing. Milan Omasta, Ph.D.

Syllabus

1. Introduction to mechanisms. Kinematics and dynamics of the crank mechanism.
2. Design of the crank mechanism. Balancing.
3. Kinematics and dynamics of the cam mechanisms.
4. Design of the cam mechanisms.
5. Transmissions with corrected gears. Planetary gears.
6. Differential gears. Unconventional tooth gears.
7. Universal joint shafts.
8. Hydrostatic mechanisms. Servomechanisms.
9. Microelectromechanical systems.
10. Electric motors.
11. Internal combustion engines.
12. Wind and water engines.
13. Summary of subject matter.

Computer-assisted exercise

22 hod., compulsory

Teacher / Lecturer

doc. Ing. Michal Kubík, Ph.D.
doc. Ing. Radovan Galas, Ph.D.
Ing. Josef Frýza, Ph.D.
Ing. Karol Sabo

Syllabus

1.-5. Analysis of the kinematic and dynamic parameters of the internal combustion engine in the PTC Mathcad software.

We will analyze the kinematic and dynamic physical quantities of the 11 kW Subaru - Robin engine during this tutorial. This engine is used to drive the garden machinery and construction aggregates. We will use experimental and analytical tools to solve the problem. In the laboratory exercise, we will deal with experimental acquisition of the engine indicator diagram on the test rig equipped with a dynamometer. We will also discuss practical issues related to the design of crank mechanisms.

6.-10. Analysis of the cam mechanism with PTC Mathcad software.

During this tutorial, we familiarize ourselves with the practical procedures of design and analysis of cam mechanism using experimental, analytical and numerical methods and simulation tools. We will deal with the experimental acquisition of the cam displacement diagram with different cams on the test rig during laboratory exercise. We will discuss practical issues regarding application of cam mechanisms and design of a suitable shape of the cam.

13. Summary of subject matter. Course credit.