1. 6/3/2016SME3252: Mechatronics Lecture 1 1 Introduction to Mechatronics Lecture 1

2. 6/3/2016SME3252: Mechatronics Lecture 1 2 1.0Introduction Mechatronics – integration of 3 engineering fields Mechanical engineering Electrical and/or electronic engineering Computer science Word ‘mechatronics’ – by engineers at Yaskawa Electric Company

3. 6/3/2016SME3252: Mechatronics Lecture 1 3 Electrical Engineering Mechanical Engineering Computer Science Mechatronics

4. 6/3/2016SME3252: Mechatronics Lecture 1 4 Mechatronics engineer is trained for: Design mechanical components of a product Design electrical components – actuator, sensor, amplifier, control logic Design computer hardware and software to control product real time

5. 6/3/2016SME3252: Mechatronics Lecture 1 5 1.2: Systems Mechtronics involves many systems System – a box with input and output Motor Rotation output Electric power input

6. 6/3/2016SME3252: Mechatronics Lecture 1 6 1.3: Measurement and instrumentation system Components – sensor, signal conditioner, display Sensor Signal conditioner Display Quantity to be measured Value of quantity

7. 6/3/2016SME3252: Mechatronics Lecture 1 7 1.4: Control system Maintain the output of system to the required input value ControllerActuator Process Sensor Controlled Variable Setpoint + - uce

8. 6/3/2016SME3252: Mechatronics Lecture 1 8 Examples Block diagram for water level control system controlleractuator Water tank sensor h ref s uq0q0 h - +

9. 6/3/2016SME3252: Mechatronics Lecture 1 9 Examples Automobile steering control system Driver Auto- mobile Measurement, visual and tactile Desired course of travel Error - + Steering mechanism Actual course of travel

10. 6/3/2016SME3252: Mechatronics Lecture 1 10 Open-loop vs. Closed loop systems Heating room switch Electric fire Input Electric power A temperature change Decision to switch on or off Output switch Electric fire Measuring device input Deviation signal Electric power output - + T required T actual

11. 6/3/2016SME3252: Mechatronics Lecture 1 11 1.5: Microprocessor-based controllers Microprocessors – replacing mechanical cam-operated controllers To carry out control function Advantages – variety of programs Embedded microcontroller – microprocessor integrated in a chip to perform certain task (PIC, ATMEL, etc.) Adaptable form – programmable logic controller (PLC)

12. 6/3/2016SME3252: Mechatronics Lecture 1 12 Microprocessor - PIC Lim Kim Fung, PSM 2006/2007

13. 6/3/2016SME3252: Mechatronics Lecture 1 13 PLC Controller inputs outputs A B C D P Q R S

14. 6/3/2016SME3252: Mechatronics Lecture 1 14 1.6: Response of systems Response of any systems to an input is not instantaneous Kettle – takes time to boil Lens to focus in an automatic camera Bathroom scale Response systems are function of time To know how system behaves – need to model the system

15. 6/3/2016SME3252: Mechatronics Lecture 1 15 2 min 20 0 C time 0 100 0 C Temperature Response for an input for a kettle

16. 6/3/2016SME3252: Mechatronics Lecture 1 16 1.7: Mechatronics approach Mechatronics – bringing together a number of technologies Electrical, electronics, mechanical, computer technology, control engineering

17. 6/3/2016SME3252: Mechatronics Lecture 1 17 End of Lecture 1 Reference: W. Bolton, Mechatronics, 3rd. Edition, Prentice Hall, 2003