Electrical Engineering

Teaching program: The program is divided into two main parts: - a first part dedicated to the basics of kinematics, dynamics and tribology of mechanical systems; vibrations in mechanical systems are presented as well, both in the mechanics of discrete systems and in the mechanics of continuum systems. - a second part aimed at presenting the commonly used mechanical devices for the transmission and transformation of power, to give the student an overview of the commonly used systems. In the second part of the course, examples of industrial and / or development problems and related solution examples will be presented as well. The course is an Integrated Teaching. Of the 9 credits of the course, 6 credits are held by the teacher in charge of teaching, and 3 credits by the teacher in charge of the supplementary module. Part 1 (3cfu module): - The core of mechanics: geometry; kinematics; dynamics; tribology; the machines. - Purpose and constitution of the machines; members, pairs and kinematic chains, mechanisms; energy conversion. - Kinematics o Motion of rigid bodies: plane motions, motions of motion, finite motions o Motion of the points attached to the bodies; Reference systems; relative motions of mechanisms o Degrees of freedom; centers of instantaneous rotation, analysis of plane kinematics. - Dynamics o Newtonian laws; Fundamental equations of dynamics; o External and internal forces and moments of inertia; D’Alembert principle; balance of bodies. o Work and energy, work theorem. - Tribology o Contact, friction and wear; o Models of classical mechanics and their critical analysis; o Tribological triplet; o Fluid lubrication and solid lubrication; o Contact problems in mechanics Part 2 (3cfu module): - The transmission of motion o Hydrodynamic, hydrostatic and rolling bearings; o Brakes and clutches; o Friction wheels, gear wheels; o Gears, gearbox and differential; o Flexible transmission systems; pulleys; chains. - Fluids general features; o Fluid balance; fluid kinematics; relative motion; continuity theorem. o Dynamics of frictionless fluids; one-dimensional motion; Euler equations; Bernoulli's theorem; lift of wings. o Friction in fluids, laminar and turbulent motion; o Reynolds number and Froude number; boundary layer; vortices; resistance to motion. o The transformation of energy and hydraulic turbines: the Pelton, Francis and Kaplan turbines. o The characteristic number. Part 3 (3cfu module, presented in parallel with the parts of the 6cfu module): - The transients in the transmission of motion; o Direct transmission; o Transmission by clutches; o Transmission with gears; - Vibrations of mechanical systems: o Vibrations in the time and frequency domains; o Concept of resonance and vibration modes; o Systems with 1 degree of freedom, 2 dof, and N dof; o Free and forced vibrations; o Damping; o Eigenvalues and eigenvectors, modal analysis; o Measurement of vibrations; o Notes on numerical and experimental modal analysis. - Introduction to the design of mechanical components. - Dynamics and kinematics problems

No particular prerequisites are required.

Slides of the classes from the teacher, available on the website of the Course; C. Ferraresi, T. Raparelli, Meccanica Applicata, 2007 (terza edizione) - CLUT (TO).

Attendance strongly recommended.

Written test with exercises and questions on the course topics. Oral exam to discuss the written test and the topics presented during the course. To pass the exam the student must obtain a mark not less than 18/30. The student must demonstrate that he/she has acquired sufficient knowledge of the topics covered by the course program and that he/she is able to apply them. To achieve a score of 30/30 cum laude, the student must instead demonstrate that he/she has acquired excellent knowledge of all the topics covered during the course, being able to propose analysis approaches and methods of consistent resolution of the problems related to the course.

The lessons include the presentation of fundamental laws and their application through exercises. Mechanical systems and their functioning are analyzed in class too.