Automatic control theory notes -> Introduction
1. A brief history of the development
British mechanic Watt a flyball governor for the steam inlet valve is connected to the closed-loop automatic speed control system configured to speed steam.
Wiener, "Cybernetics" in 1948, he was a mathematician.
Qian, 1956, engineering cybernetics.
Recommended books: 1. The rise of machine engineering cybernetics 2. 3. walked Qian
Understand, classical control theory first phase of the study is a single-input single-output target, which is the first water tank problem.
The second stage, the production line is used in a robot arm, etc., need to be calculated by state space matrix of each joint.
The third stage is now, covers too broad.
2. The basic principles of automatic control
1) automatic control
Manual control: the classic tank problem. Leaking tank, and people need to constantly water, more water will slow down the speed, the less you want to tighten the faucet bigger. As shown below:
Automatic Control: as shown below
2) closed loop control and open-loop control
Ring-opening advantages: low cost, simple structure
Closed Loop advantages: anti-interference ability.
3) The basic requirements of the feedback control system.
Core: "cause and effect - because if relations." Means that the first input to obtain an output, then the output as feedback, to the input terminal, to achieve closed loop control.
Three basic requirements: stability, speed, accuracy. (Three mutual restraint)
