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With the continuous intensification of competition in the industrial automatic control system device manufacturing industry, the integration of mergers and acquisitions and capital operation among large industrial automatic control system device manufacturing enterprises are becoming increasingly frequent. Excellent domestic industrial automatic control system device manufacturing enterprises are paying more and more attention to research on the industry market, especially in-depth research on the industrial development environment and product buyers.
According to different control principles, automatic control systems are divided into open-loop control systems and closed-loop control systems.
Open loop control system
In an open-loop control system, the system output is only controlled by the input, and the control accuracy and interference suppression characteristics are relatively poor. In an open-loop control system, the logic control based on time sequence is called a sequential control system; Composed of sequential control devices, detection components, actuators, and controlled industrial objects.
Mainly used in the control of processes such as machinery, chemical engineering, material loading and unloading transportation, as well as robotic arms and production automation lines.
Closed-loop control system
The closed-loop control system is built on the basis of feedback principle, and can achieve good control performance by controlling the system using the deviation of the expected output value at the same time. Closed loop control system, also known as feedback control system.
According to the given signal classification, automatic control systems can be divided into constant value control systems, servo control systems, and program control systems.
Constant value control system
A system where the given value remains unchanged and the system output is required to approach the given desired value with a certain degree of accuracy. Automatic control systems such as temperature, pressure, flow rate, liquid level height, and motor speed during the production process belong to constant value systems.
Follow-up control system
The given value changes as an unknown time function, requiring the output to follow the change of the given value. A radar antenna system that follows a satellite.
Program Control System
The given value varies as a function of time. Such as programmable machine tools.
Automatic control systems have been widely applied in various fields of human society.
