CONTROL SYSTEM. AN INTRODUCTION. Contents. 1. An Motion Control System 2. Purpose of Closed-Loop Control 3. Servo and Regulation Systems 4. Controller 5. How to Identify System 6. Summary. 1. An Motion System.
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Plant: Input-output relationship (transfer function) may vary uncertainties (including time-varying) and Disturbances
Nominal Model G(s)=5/(s+1)
Actual Model G(s)=5.9/(s+1.3)
Sensor: output may be digital or analog. Its input: real “speed”, its output: “readable data” of speed
Actuator: Its input: “readable data” of the voltage of the power source.
Its output: voltage, with needed current
Decision Making: Controller
Analyze the input-output data pairs to fit the parameters in the used model (structure)
How to analyze and how to generate the data pairs for analysis: