Modern'Control'Systems
Code:&PGT312/3&
Lecturer:&Mohd&Hafizi&bin&Omar&&&Pn.&Hazila&Othman&
& & & Jabatan&Teknologi&Kejuruteraan&Elektronik&
& & & Fakulti&Teknologi&Kejuruteraan&
& & & Universiti&Malaysia&Perlis&
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Control Systems: Concepts, Design, and Analysis, Study Guides, Projects, Research of Control Systems
A portion of a control systems textbook, covering the basics of control systems, their configuration, applications, and design objectives. It includes definitions, examples, and exercises. The document focuses on feedback control systems, open and closed-loop systems, and the benefits of studying control systems.
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2021/2022
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Modern Control Systems
Code: PGT312/
Lecturer: Mohd Hafizi bin Omar & Pn. Hazila Othman
Jabatan Teknologi Kejuruteraan Elektronik
Fakulti Teknologi Kejuruteraan
Universiti Malaysia Perlis
Course Outcomes CO1: Ability to EXPLAIN control systems and control systems design. CO2: Ability to DESCRIBE the mathematical model models for such mechanical, electrical and electromechanical systems. (state variable systems, stability in feedback control systems, and frequency domain). CO3: Ability to ANALYZE AND DESIGN linear feedback systems using root locus method, digital control systems.
References Text Book: Richard C. Dorf, Robert H. Bishop, Modern Control Systems, 12 th edition, Prentice Hall, 2011. Norman S Nise, Control System Engineering, 6 th Ed, 2011. Other references: K. Ogata, Modern Control Engineering, 5 th edition, Prentice Hall, 2009. G. Franklin, J.D. Powell and A. Emani-Naeini, Feedback Control and Dynamic Systems, 6 th edition, Prentice Hall, 2009. Constantine H. Houpis, Stuart N. Sheldon, Linear Control System Analysis and Design with MATLAB, 6 th edition, CRC Press, 2014.
Teaching Plan Week Course Contents 1 Introduction to Control Systems 2-3 Mathematical Models of Systems 4-5 State Variable Models 6-7 Feedback Control Systems And Characteristics, Performance and Stability of Linear Feedback Systems. 9 Root Locus Method 10-11 Frequency Response Method 12-13 Stability in the frequency domain. 14-15 Digital Control Systems
Definition on standard terms used:
Control: The process of causing or regulate the system to
to desired value.
System: A collection of components which are
coordinated together to perform a function.
Control System:
Interconnection of components forming a system
configuration that will provide a desired system response.
Figure 1.1: Simplified description of a control system 7
Example 1: Elevator Figure 1.2 Elevator response
Figure: Escalator incident. Adapted from Harian Metro, 13 Feb 2016.
Advantages of Control Systems
- Can^ move large equipment^ with precision that otherwise be impossible.
- Can point huge antennas toward the farthest reaches of the universe to pick up faint radio signals
- Elevators (timing) carry us quickly to our destination. Control systems built for four (4) primary reason: - Power amplification - Remote control - Convenience to input form - Compensation to disturbances - Others?…
Example 2: Antenna azimuth position control Figure 1.4 (a): System concept Figure 1.4 (b): Detailed layout Figure 1.4 (c): Schematic Figure 1.4 (d): Functional block diagram
Analysis and Design Objectives
- Analysis is the process by which a system’s performance
is determine.
- Design is the process by which a system’s performance
is created or changed.
- Familiar with Transient, Steady-State, and Stability
(please refer Fig 1.2)
- Other considerations: Hardware selection, finances, and
robustness
*please describe based on your understanding
Summary
What have you learned from this topic?
- Name three applications for feedback control systems. Guided missiles, automatic gain control in radio receivers, satellite tracking antenna
- Name three reasons for using feedback control systems and at least one reason for not using them. Yes - power gain, remote control, parameter conversion; No - Expense, complexity
- Give three examples of open-loop systems. Motor, low pass filter, inertia supported between two bearings
- Functionally, how do closed-loop systems differ from open-loop systems? Closed-loop systems compensate for disturbances by measuring the response, comparing it to the input response (the desired output), and then correcting the output response.
- Name the three major design criteria for control systems. Stability, transient response, and steady-state error
- Name the two parts of a system’s response. Steady-state, transient
- Physically, what happens to a system that is unstable? It follows a growing transient response until the steady-state response is no longer visible. The system will either destroy itself, reach an equilibrium state because of saturation in driving amplifiers, or hit limit stops. Review Questions
- Answer to Exercise
CHAPTER 2: MATHEMATICAL MODELS OF SYSTEM