Open-loop control box closed-loop control of test machine

Testing machineIt is a kind of testing equipment, and various manufacturing industries have been widely used. Hengsi Shanda provides customers with complete technical support.

(1) Closed-loop control

Closed-loop control is a basic concept of cybernetics. Refers to a control relationship in which the controlled output is returned to the input terminal as the control in a certain way and exerts control influence on the input terminal. Generally, the withdrawal quantity and the input quantity are opposite to the phase, so it is called negative feedback control. Automatic control is usually closed-loop control. For example, the control of the temperature of the household air conditioner, the output end is fed back to the input end and participates in the re-control of the output end. This is the purpose of closed-loop control, and this purpose is achieved through feedback. Positive and negative feedback are two common basic forms of closed-loop control.

(2) Open loop control:

Open-loop control cannot be used to control the input quantity by changing the output signal, and manual control is generally open-loop control. For example, manually converting the fan gears to achieve speed control. The difference between open-loop control and closed-loop control is: whether there is feedback. There is no open loop, there is no closed loop. The so-called feedback refers to the effects caused by behavioral actions. Simple example "You slapped someone else, you saw his blushing, this is the feedback you get from your eyes" closed loop system example:

A fully automatic washing machine. When adding water to the washing machine, an infrared sensor inside scans the water level to the height. When the water level is right, the washing machine will automatically stop adding water. If it is an open-loop-controlled washing machine, the water level must be seen by people. When people think the water level is right, they will turn off the faucet.

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