Method for controlling motor of gas mixing device based on variable-speed integral PID (Proportion Integration Differentiation)

Abstract

The invention relates to a method for controlling a motor of a gas mixing device based on variable-speed integral PID, and belongs to the field of automation. The method comprises the following steps: S1, establishing a system model; and S2, applying the system model to a PID control system for controlling a gas mixing device. Although simple PID adjustment is simple in structure, each output is related to a past state due to full output, accumulation needs to be carried out during calculation, and the workload is large; moreover, because the output of the computer corresponds to the actual position of the actuating mechanism, if the computer breaks down, the output will change greatly, the actuating mechanism will change greatly, and serious production accidents may be caused.

Description

technical field [0001] The invention belongs to the field of automation, and relates to a method for controlling a motor of a gas mixing device based on a variable speed integral PID. Background technique [0002] In related fields such as gas utilization and chemical synthesis, it is often necessary to fully mix two gases with different concentration values, and wait for the mixed gas with stable concentration required by the process. [0003] Most of the existing mixing technical solutions stay in the manual control stage, and some automatic controls only use a simple PID control algorithm to control only one loop of flow or concentration. [0004] Although the structure of simple PID adjustment is simple, due to the full output, each output is related to the past state, and it needs to be accumulated during calculation, and the workload is large; and, because the computer output corresponds to the actual position of the actuator, if the computer If there is a failure, th...

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Problems solved by technology

[0007] In view of this, the purpose of the present invention is to provide a method for controlling the motor of a gas mixing device based on variable speed integral PID, to solve the technical problem that the traditional simple PID adjustment control cannot be adjusted quickly and accurately when encountering a sudden change in flow rate and concentration; The single-loop control is only a single adjustment control for flow or concentration, and realizes high-precision intelligent adjustment control for concentration and flow at the same time

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