Control method
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Let’s discuss: 1. What are the control methods? 2. What is the difference between them? 3. Where is it appropriate to use each control method?
Come in and sit on the sofa. Try to talk about it. 1. What are the control methods? Control methods include pneumatic, electric, hydraulic, and mechanical; these can be further divided into manual, semi-automatic, and fully automatic. 2. Control objects include temperature, flow rate, pressure, liquid level, as well as start/stop control. This topic is too broad – it could fill an entire book. One more thing to add: it is also possible to control the direction of fluid flow, as well as the operation time, among other things. This post was last edited by zhangyong6404 on 2009-3-19 22:02.]
The control in chemical production is achieved through instrument regulation, which is the process of adjusting deviations by using output signals when parameters deviate from set values. There are various ways to classify automatic control systems; some classification methods are based on variables such as pressure, flow rate, temperature, etc ； They can also be classified according to control laws. Based on the differences in the given values, automatic control systems can be classified into three categories: constant-value control systems, program-controlled systems, and follow-up control systems. The most basic control laws are on-off control, proportional control, integral control, and derivative control.