Multichannel decoupling temperature control method

Abstract

The invention discloses a multichannel decoupling temperature control method. The method comprises steps as follows: a transfer function matrix is established between input voltage and output temperature of a temperature control system, step voltage input is provided for the channels one by one respectively, corresponding step ascending curves are acquired, and corresponding parameters of a transfer function are recognized; a decoupling network is designed for decoupling of the temperature control system, and finally, all the channels of the temperature control system are correspondingly and more accurately adjusted and controlled in combination of the decoupled transfer function and an incremental PID (proportion integration differentiation) algorithm. By means of the method, coupling among multiple channels can be greatly reduced, and meanwhile, the temperature control method has the advantages of high temperature curve response speed, small overshooting, short adjusting time and the like, and is particularly applicable to application occasions of various temperature control systems with high coupling.

Description

technical field [0001] The invention belongs to the related field of processing temperature control technology, and more specifically relates to a multi-channel decoupling temperature control method. Background technique [0002] In the production process of many industrial fields, temperature control plays a very important role, and compared with the control of industrial parameters such as pressure, flow, liquid level, etc., temperature control has the characteristics of large hysteresis and nonlinearity. The difficulty is greater, and the control effect is more difficult to grasp. For example, in industrial production processes such as multi-stage temperature control of injection molding machine barrels or multi-temperature zone control of industrial boilers, the traditional single-temperature zone temperature control system can no longer meet the increasingly updated production requirements. Therefore, the multiple-input multiple-output (MIMO) temperature control system ...

AI Technical Summary

Problems solved by technology

However, the actual engineering practice shows that due to the lack of consideration of the coupling relationship between the temperature zones (channels), the temperature values ​​of each temperature zone affect each other. When the temperature value of a certain temperature zone fluctuates suddenly, several other channels will also Interference, which directly affects the regulation accuracy of the final output temperature

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