Mô tả:
SYSTEM DYNAMICS & CONTROL
CHAPTER 3
ELEMENTS OF THE
AUTOMATICS SYSTEM
Dr. Vo Tuong Quan
HCMUT - 2011
Elements & Automatics System
Antenna azimuth position control system
System concept
2011 – Vo Tuong Quan
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Elements & Automatics System
Antenna azimuth position control system
Detailed layout
2011 – Vo Tuong Quan
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Elements & Automatics System
Antenna azimuth position control system
Schematic
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2011 – Vo Tuong Quan
Elements & Automatics System
Antenna azimuth position control system
Function block diagram
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2011 – Vo Tuong Quan
Elements & Automatics System
Antenna azimuth position control system
Response of a position control system
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2011 – Vo Tuong Quan
Elements & Automatics System
Open-loop systems
Block diagram of control systems: open-loop system
Open-loop systems do not monitor or correct the output for disturbances;
however, they are simpler and less expensive than closed-loop systems
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Elements & Automatics System
Closed-loop systems
Block diagram of control systems: Closed-loop system
Closed-loop systems monitor the output and compare it to the input. If an error
is detected, the system corrects the output and hence corrects the effects of
disturbances
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Elements & Automatics System
Control systems analysis and design focuses
•
Producing the desired transient response
•
Reducing steady-state errors
•
Achieving stability
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Elements & Automatics System
Closed-loop systems:
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Elements & Automatics System
The Design Process:
Step 1: Determine a physical system and specifications from requirements
Step 2: Draw a functional block diagram
Step 3: Represent the physical system as a schematic
Step 4: Use the schematic to obtain a mathematical model, such as a block
diagram
Step 5: Reduce the block diagram
Step 6: Analyze and design the system to meet specified requirements and
specifications that include stability, transient response, and steady-state
performance
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