Learning outcomes of the course unit
The aim of the course is to supply knowledges and methodologies about choosing and using actuators for industrial automation. In particular, several examples of choice between traditional mechanical design and modern mechatronic solutions are discussed.
Physics (Classical mechanics)
Power and control engineering
Course contents summary
First part: introduction to actuators and main features.
Mechanic actuators. Characteristic curves. Speed motor, torque motor. Direct coupling motor-load, motor braking, mechanical transient,stability. Speed reducers, choose of reduction ratio, efficiency. Clutches and friction clutches. Transformation of rotary motion intolinear reciprocating motion and vice versa.
Electric actuators. Functional features. Asynchronous motor. DC motor: series-parallel excitation, permanent magnet. Brushless motor. Stepper motor. Thermal verify and operating conditions. Sensors and transducers. Drives (power and control) and regulation.
Pneumatic actuators. Cylinders, motors, sequential control.
Hydraulic actuators. Cylinders, motors, servocontrols.
Second part: application topics.
Motion design and control. Choosing and programming the law of motion. Interpolation. Motion synchronization and digital control techniques.
Index Protection and thermal aspects.
Friction in actuators. Milling machine motors.
Third part: performance evaluation in some meaningful applications:
Running cut machine: clearances and positioning errors;
Pallet machine motors;
Conveyor belts with asynchronous motors;
G. LEGNANI, M. TIBONI, R. ADAMINI: 'Meccanica degli azionamenti Vol. 1', Progetto Leonardo, Bologna 2002. ISBN: 88-86524-64-1
C. MELCHIORRI: 'Traiettorie per azionamenti elettrici', Progetto Leonardo, Bologna 2000.ISBN: 88-86524-53-6
H.GROSS (a cura di) 'Azionamenti elettrici di avanzamento per macchineutensili', Tecniche Nuove, Milano 1990. ISBN: 88-7081-391-6
SEW-EURODRIVE: 'Manuale degli organi di comando', Tecniche Nuove, Milano 1985. ISBN: 88-7081-099-2
W.DEPPERT, K. STOLL: 'Comandi pneumatici: introduzione ai principifondamentali', Tecniche Nuove, Milano 1977. ISBN:88-7081-025-9
G. BOSCA: 'Impianti oleodinamici: prevenzione e diagnosi dei guasti', Tecniche nuove, Milano 1988. ISBN: 88-7081-363-0
Exercises are dedicated to program electric and pneumatic actuators in laboratories.
Tutoring activities are supported also with a mailing list in order to share explanations and exercises.
Two intermediate tests and an oral examination (or a project). Each test exempts from the oral examination on the corresponding part of thecourse.
The active participation to lectures and other activities is evaluated.