Optional group:
Progettazione dei Sistemi Meccanici - 45 CFU - (show)
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45
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20810411 -
Machine Mechanics and Dynamics
(objectives)
The course aims to provide students with up-to-date and innovative skills, abilities and professionalism in the area of functional mechanical design and dynamic simulation of mechanical systems and robots, which will be used in product development and service applications and plant development. In this regard, mechanical systems for industrial, service, automation and automotive applications will first be explained through the study of their kinematic structure and function. Innovative mechanism design methods will then be discussed, in particular, for industrial automation, human centered applications and automotive, proposing, among others, kinematic synthesis methods for infinitesimal and finite motions, function-generating mechanisms, rigid body guidance and trajectory generator. Tribological implications will also be considered. Next, the dynamic simulation of multibody systems in space and vehicle dynamics will be modeled in SE(3). Mechanical design and dynamic simulation will be applied to the following topics: industrial robotics for automation and service; micro and nano (MEMS and NEMS) systems; navigation systems based on inertial sensors; wearable systems; powertrains, planetary gearboxes, automatic transmissions, differential, cam systems, clutches, special mechanisms.
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BELFIORE NICOLA PIO
( syllabus)
Introduction to mechanical systems for industrial, service, automotive, and automation applications.
Kinematics and dynamics of multibody systems in space, vehicle dynamics through modeling and dynamic simulation in SE(3). Dynamic simulation of MBS (multi-body systems): efficient methods for solving dynamic equations for constrained MBS.
Industrial robotics for automation and service robotics; elements of robot mechanics, spherical geared wrists. Elements of mechatronics: control of mechanical systems under dynamic conditions, autonomy, automation mechanisms, dwell systems, microcontrollers.
Compliant mechanisms: kinematic analysis and synthesis of selectively compliance mechanisms, kineto-static analysis, dynamic analysis. Isotropic compliance: synthesis of selective compliance in mechanisms and robots in E(3) and SE(3). Micro and nano MEMS and NEMS systems; navigation systems based on inertial sensors, wearable systems; MEMS and NEMS: design, simulation, fabrication, characterization, testing, and operational modes of micro/nano electro-mechanical systems.
Transmissions, epicyclic gearboxes, automatic transmissions, differentials, cam systems, couplings, Maltese cross mechanisms, and toggle joints. Design methods, classification according to Artobolewsky, functional classification: rigid body guidance, function generator, and trajectory generator. Topological Analysis and Synthesis of Mechanisms: graph-mechanism correspondence; enumeration of kinematic chains; isomorphism and planarity; automatic representation of kinematic chains and mechanisms. Kinematic analysis and synthesis of mechanisms for finite displacements: method based on displacement matrices, motions in the plane and in space, Freudenstein’s equation. Kinematic synthesis of mechanisms for infinitesimal displacements: classical Buermester theory, generalized Buermester theory, general methods of kinematic synthesis based on geometric invariants and first-order centrodes; kinematic analysis through kinematic invariants, affine four-bar linkages.
Functional design of automotive elements: automatic transmissions, epicyclic, differentials, suspensions and shock absorbers, steering mechanisms, couplings and clutches. Transmission and drive elements: transmission for parallel, intersecting, and skewed axes, articulated joints, principle of inertia match.
Computational intelligence: optimization algorithms for mechanisms, performance indices, pressure angle, mechanical advantage. Energy. Functional design of elements for the development of energy sources.
Ocean Engineering. Functional design of elements for the development of marine engineering systems.
Lubrication: elastohydrodynamic lubrication EHD.
Creativity in design: mechanism atlases, TRIZ and LT methods. Computational intelligence: optimization algorithms for mechanisms, neural networks, performance indices, pressure angle, mechanical advantage.
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9
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ING-IND/13
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72
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Core compulsory activities
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20810148 -
INDUSTRIAL MEASUREMENTS
(objectives)
The overall aim of the course of Industrial Measurements is to provide students with advanced knowledge and skills to orientate themselves among design, use and management of measurement systems in industrial processes depending on the technical requirements. In particular the selection criteria of the measurement system components are provided, based on an integrated approach taking into account not only the metrological and functional characteristics of the measuring devices, but also the evaluation of specifications typical of industrial applications and effective measurements. To this aim the analysis of available technologies and the good management practices for measurement instrumentation are considered. Moreover, part of the course is based on the study of specific standards, technical data-sheet and manuals as well as experimental laboratory activities.
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SCORZA ANDREA
( syllabus)
Performance and metrological characteristics of measurement systems for industry: basics of metrology and measurement methods. Analysis and processing of dynamic measurements. Applied statistics to industrial measurements and quality control. Fundamentals of Technical Writing.
Measurement systems and signal processing for industrial applications: impedance matching, amplifiers, filtering, signal modulation and demodulation, bridge circuits, linearization, transmitters, communication standards of measurement devices. Elements of digital data acquisition systems for industrial applications. Network Infrastructures for Industrial Measurements: Fundamentals and Applications.
Methods and devices for mechanical and thermal measurements in industry and manufacturing, e.g. non-invasive measurement systems, optical measurement methods, non-contact temperature measurement, level measurements, ultrasound systems, resistive, capacitive and inductive transducers, radiometric measurement systems, etc. Industrial Instrumentation management.
( reference books)
• W. C. Dunn, Fundamentals of Industrial Instrumentation and Process Control, McGraw-Hill, 2005.
• C. W. de Silva , Sensors and actuators – Engineering System Instrumentation, CRC Press Taylor & Francis Group, 2015.
• Beckwith T.G., Marangoni R.D. & Lienhard J.H, Mechanical Measurements, Pearson Prentice Hall, 2007.
• Tony R. Kuphaldt, Lessons In Industrial Instrumentation, Samurai Media Limited, 2019.
• Alessandro Brunelli, Manuale di taratura degli strumenti di misura, Gisiservizi, 2012.
• G. Malagola, A. Ponterio, La metrologia dimensionale: teoria e procedure di taratura, Società Editrice Esculapio, 2013.
• D.C.Montgomery, Introduction to Statistical Quality Control, John Wiley & Sons, Inc., 2009.
• R. S. Figliola, D. E. Beasley, Theory and Design for Mechanical Measurements, 6th Edition, Wiley, 2015.
• Hughes, T. Hase, Measurements and their Uncertainties A practical guide to modern error analysis, Oxford University Press Inc., New York, 2010.
• W. Navidi, Probabilità e statistica per l'ingegneria e le scienze, Mc Graw Hill, 2006.
• CEI UNI 70098-3: 2016, Incertezza di misura. Parte 3: Guida all'espressione dell'incertezza di misura
• F. P. Branca, Misure meccaniche, E.S.A. Editrice, Roma 1980.
• P. Cappa, Sensori e Trasduttori per Misure Meccaniche e Termiche, Voll. I-III, Borgia Editore, 1994.
• Lecture notes
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9
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ING-IND/12
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72
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Core compulsory activities
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ITA |
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20810095 -
VIBRATIONS MECHANICS
(objectives)
The aim of the course is to provide physical and mathematical models to analyze the vibrations of the machines.
Discrete and continuum models, such as beams, strings, membranes, plates and shells, will be introduced during the course as well as the methods to analyze complex mechanical structure, including the finite element method. Furthermore, the problems related to the rotordynamics will be also examined.
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BOTTA FABIO
( syllabus)
• Elements of the theory of the vibrations
o Single degree of freedom
o Multi degree of freedom
o Continuos models: beams, plates and shells
• Finite element method
• Critical speeds
( reference books)
• Graff K. F., Wave motion in elastic solids, Dover, 1975.
• Weaver W. Jr, Timoshenko S. P., Young D. H., “Vibration problems in engineering” – Wiley Interscience
• Soedel W., “Vibrations of shells and plates” – Dekker Mechanical Engineering
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9
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ING-IND/13
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72
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Core compulsory activities
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ITA |
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Università Roma Tre