linear control system introduction
Chapter I
Introduction to control systems
1
EE352: Lecture 01: Introduction to linear control systems
Definition 1 (Control system). an interconnection of subsystems and processes forming a configuration that will lead to the desired output, given a specified input.
Desired output
Reference input
Control system
plant
reference input
Actual output system response
controlled variable
The control system manipulates the input of the process to get the desired response
2
EE352: Lecture 01: Introduction to linear control systems
I.1
I.1.1
Classification of control systems regulator-type The output must be held as close as possible (regulated) to a desired input value (usually constant).
Examples
:
• Air conditioning system.
• Car speed regulator
• Oven temperature control
I.1.2
Tracking-type or Servomechanisms
The output must be forced to follow a changing input.
Examples:
• Anti-missiles tracking systems.
• Tele-surgery
• Solar tracking systems
3
EE352: Lecture 01: Introduction to linear control systems
I.2
Control systems configurations
Two main configurations:
I.2.1
Closed loop control systems
(feedback control system) uses the difference between the desired output (reference input) and a feedback of the actual output to control systems.
The systems has a loop (closed loop system)
Desired output
Comparator
Actual output
Controller
Process
Feedback
Examples:
• Air conditioning system: the output is the room temperature.
• Car speed regulators: the output is the speed of the car.
• Anti locking system (ABS): the output is the locking state of the wheels.
4
EE352: Lecture 01: Introduction to linear control systems
I.2.2
Open-loop control system
The systems is controlled without feedback (without knowing what is the real output). There is no loop, or open-loop.
Desired output
Process
Controller
Examples:
• Washing machines: the output is
Introduction to control systems
1
EE352: Lecture 01: Introduction to linear control systems
Definition 1 (Control system). an interconnection of subsystems and processes forming a configuration that will lead to the desired output, given a specified input.
Desired output
Reference input
Control system
plant
reference input
Actual output system response
controlled variable
The control system manipulates the input of the process to get the desired response
2
EE352: Lecture 01: Introduction to linear control systems
I.1
I.1.1
Classification of control systems regulator-type The output must be held as close as possible (regulated) to a desired input value (usually constant).
Examples
:
• Air conditioning system.
• Car speed regulator
• Oven temperature control
I.1.2
Tracking-type or Servomechanisms
The output must be forced to follow a changing input.
Examples:
• Anti-missiles tracking systems.
• Tele-surgery
• Solar tracking systems
3
EE352: Lecture 01: Introduction to linear control systems
I.2
Control systems configurations
Two main configurations:
I.2.1
Closed loop control systems
(feedback control system) uses the difference between the desired output (reference input) and a feedback of the actual output to control systems.
The systems has a loop (closed loop system)
Desired output
Comparator
Actual output
Controller
Process
Feedback
Examples:
• Air conditioning system: the output is the room temperature.
• Car speed regulators: the output is the speed of the car.
• Anti locking system (ABS): the output is the locking state of the wheels.
4
EE352: Lecture 01: Introduction to linear control systems
I.2.2
Open-loop control system
The systems is controlled without feedback (without knowing what is the real output). There is no loop, or open-loop.
Desired output
Process
Controller
Examples:
• Washing machines: the output is