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Free University of Bozen-Bolzano

Mechanics of Machines and Mechanism for Automation

Semester 1-2 · 42185 · Bachelor in Industrial and Mechanical Engineering · 10CP · IT


The course belongs to the type "caratterizzanti” – areas: mechanics and automation.
It aims at teaching both scientific foundations and practical methods.
The course aims at introducing the necessary skills for understanding the basic principles of the mechanics of automatic machines and their functional design and analysis.
• Degrees of Freedom, kinematic pairs, kinematic scheme of a mechanism, structure equation;
• Kinematic analysis of mechanisms (position, velocity, acceleration);
• Static and dynamic analysis of (planar) mechanisms. Lagrange's equations;
• Mechanisms for automatic machines: motion generation; cam mechanisms; motion irregularities;
• Mechanics of Drives: motor-gear-load coupling (introduction);
• Mechanics of Robots: introduction to 3D kinematics and industrial robots.

Lecturers: Andrea Giusti

Teaching Hours: 60
Lab Hours: 36
Mandatory Attendance: Attendance is not compulsory.

Course Topics
Introduction and fundamentals. Basic concepts and definitions for the study of mechanisms. Degrees of freedom, kinematic pairs and structure equation. Kinematic analysis of planar mechanisms. Kinematic analysis of position, velocity and acceleration (by base and dyads mechanisms). Singular configurations. Examples. Static and dynamic analysis of planar mechanisms. Recalls on Newtonian and Lagrangian approach. Newtonian and Lagrangian method for the static analysis of planar mechanisms. Application examples. D'Alembert's principle. Equation of dynamic equilibrium for mechanisms. Lagrange's equation. Inertia reduced to the free coordinate. Motion irregularities. Mechanisms for automatic machines: introduction to the laws of motion; generation of movements - reciprocating, and translational motion. Cam mechanisms and mechanisms for unidirectional and intermittent motion. Mechanics of drives: introduction, basic concepts on motor-load coupling with and without gearbox. Mechanics of robots: introduction, 3D kinematics of robot, introduction to the Denavit-Hartenberg convention, characteristics of the main industrial robots, robot simulation.

Teaching format
The topics are presented by the professor by means of Power Point presentations or the blackboard. Practical parts and lab activities/exercises (e.g. Matlab, WorkingModel, Simscape Multibody or MSC Adams) are planned. A selection of the material presented in class and useful material will be available in the course reserve collection database.

Educational objectives
Students will learn, in the first part of the course, fundamental concepts and methodologies for the functional design and kinematic (and dynamic) study of the mechanisms used in automatic machines; in the second part of the course, students will acquire skills related to (i) the sizing of components to be used in automatic machines to generate predefined movements and (ii) robotic systems used in automated systems. Knowledge and understanding 1. Knowledge and understanding of applied mechanics fundamentals. 2. Knowledge and understanding of the main mechanical components and their applications. 3. Knowledge of the main mechanisms and robots used in automatic machines and their function. Applying knowledge and understanding 4. Ability to formulate the equilibrium conditions for a mechanical system. 5. Ability to apply the learned principles in the study of planar mechanisms. 6. Ability to apply the learned principles for the synthesis of mechanisms for automatic machines and the choice of robotic systems. Making judgements 7. Making judgments for choosing the suitable mechanical component or kinematic solution. Communication skills 8. Ability to present the acquired knowledge and competences with a proper language. Learning skills 9. Ability to autonomously extend the knowledge acquired during the study course.

Assessment
- Summative assessment. Written exam with exercises and questions: 60% written exam, exercises: 2 exercises (100 minutes); ILOs assessed: 1 - 8; 40% written exam, theory: 4 questions. (80 minutes): ILOs assessed: 1,2,4,6,7. - Optional midterm test on the first part of the course, consisting of questions and an exercise: 60% optional midterm written test:1 exercise (50 minutes); ILOs assessed: 1 - 5, 8; 40% optional midterm written test, theory: 2 questions. (40 minutes); ILOs assessed: 1-3, 8. The result of the optional midterm test, if sufficient (>=18/30), may be considered, for the entire academic year, as the grade for the first part of the course content. In this case, the final written exam result will be computed as the arithmetic mean of the optional midterm test result and the written exam result for the second part of the course.

Evaluation criteria
Theoretical knowledge (35%) Correctness of methods (35%) Correctness in solution (30%)

Required readings

Notes from the lectures.

Handouts provided by the lecturer.

Subject Librarian: David Gebhardi, David.Gebhardi@unibz.it and Ilaria Miceli, Ilaria.Miceli@unibz.it



Supplementary readings

M. Callegari, P. Fanghella, F. Pellicano, Meccanica applicata alle macchine, Ed. Utet Università.

M. Giovagnoni, A. Rossi, Una introduzione allo studio dei meccanismi, Ed. Cortina, Padova

G. Jacazio, S. Pastorelli, “Meccanica applicata alle macchine”, Ed. Levrotto e Bella, Torino

B. Siciliano, L. Sciavicco, L. Villani, G. Oriolo, "Robotica - Modellistica, pianificazione e controllo", McGraw-Hill Education, 3a edizione.

G. Legnani, M. Tiboni, R. Adamini, D. Tosi, "Meccanica degli Azionamenti. Azionamenti Elettrici", Società Editrice Euscalpio. 3a edizione.



Further information
Software used (possible): Matlab, WorkingModel, Simscape Multibody or MSC Adams.


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Sustainable Development Goals
This teaching activity contributes to the achievement of the following Sustainable Development Goals.

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