MODULE DETAILS

Module 4: Actuators

 

Nominal duration: 6 weeks (48 hours total time commitment)

 

This time commitment includes the preparation reading, attendance at each webinar (1 hour plus 15-30 minutes for discussion), the time necessary to complete the assignments, and further study.

 

 

MODULE PURPOSE

 

 

A large range of actuators is used in Mechatronics applications. Without them, robots of any kind would simply not exist. This module covers the whole spectrum of actuators (primarily electric), including both linear and rotary actuators. Rotary actuators include AC and DC motors of various types such as stepper motors and servos. Linear electrical actuators include both AC and DC types, as well as electro-hydraulic and electro-pneumatic actuators. This module will also address the electronic drive systems for these actuators.

 

 

PRE-REQUISITE MODULES/UNIT(S)

 

 

Module 3: Electro-technology

 

ASSESSMENT STRATEGY

 

To evaluate the achievement of the learning outcomes; written assignments, group projects and practical exercises are set.

 

 

SUMMARY OF LEARNING OUTCOMES

1.      Examine and discuss the actuators used in Mechatronics applications

 

 

Learning Outcome 1

 

 

Assessment criteria

 

 

 

 

 

 

 

 

 

 

 

 

 

Examine and discuss the actuators used in Mechatronics applications

 

1.1.  Examine and discuss the following aspects of DC motors:

(a)              Basics of construction and principles of operation

(b)              Motor curves: voltage vs. current and speed vs. torque

(c)              Drive methods

(d)              Control of speed, direction and braking

 

1.2.  Examine and discuss the following aspects of servomotors:
(a) Basics of construction and principles of operation
(b) Control circuits
(c) Control signals (encoders and tachometers)
    

1.3.  Examine and discuss the following aspects of stepper motors:
(a) Basics of construction and principles of operation
(b) Classification
(c) Drive methods

1.4.  Examine and discuss the basics of construction, principles of operation of the following AC motors:
(a) Rotary induction
(b) Rotary synchronous
(c) Linear induction
(d) Linear synchronous

1.5.  Outline the basic attributes of the following actuators:
(a) Slewing drives
(b) Linear electro-hydraulic actuators
(c) Linear electro-pneumatic actuators
(d) Gear drive and belt drive actuators
(e) Acme and ball screw drives
(f) Ultrasonic linear motors
(g) Ultrasonic rotary motors
(h) Brushless DC motors
(i) Piezo linear stack actuators
(j) SMAs (muscle wire)
(k) Solenoids

 

 

Delivery Mode

A combination of asynchronous and synchronous e-learning delivery comprising a judicious mix of interactive online web conferencing, simulation (virtual labs) software, remote online labs, online videos, Power Points, notes, reading and study materials (in pdf, html and word format) accessed through the Moodle Learning Management System (LMS).

Software/Hardware Used

Software

  • Proteus

Hardware

  •  N/A