Daily Question: Methanol Technology Exchange Edition 20180413
Thread Content
This post was last edited by Xiao Yu on 2018-4-13 at 09:38. Let’s learn from the best practices in the “Study & Brothers” section. There are rewards for correct answers; everyone who participates gets a reward. Let’s grow and mature through these Q&A sessions. Brief answer: Types of automatic control systems: There are two types of automatic control systems, namely open-loop control systems and closed-loop control systems. The closed-loop control loop consists of several components such as detection, transmission, regulation, and actuation, and it is the most common type encountered in chemical plants. Closed-loop control systems are further divided into ⑴ constant-value control systems ； ⑵ Follow-up control system ； ⑶ Programmed (sequential) control system.
A typical example of industrial application is cascade control, and the most common use of cascade control is three-element control for boiler drum water level.
There are two types of automatic control systems: open-loop control systems and closed-loop control systems. The closed-loop control loop consists of several components such as detection, transmission, regulation, and actuation, and it is the most common type encountered in chemical plants. Closed-loop control systems are further divided into ⑴ constant-value control systems ； ⑵ Follow-up control system ； ⑶ Programmed (sequential) control system.