Constant temperature difference temperature control method and system, industrial control equipment and storage medium

Abstract

The invention provides a constant temperature difference temperature control method and system, industrial control equipment and a storage medium, and the method comprises a model determination step:employing a time domain measurement and analysis method to measure a measured system, so as to obtain a constant temperature control mathematic model of the measured system; a discretization processing step: adopting a proportional integral differential control algorithm to discretize the time domain continuous function input into the tested system so as to obtain a discrete domain proportional integral differential control formula; and a dynamic adjustment step: continuously detecting a temperature difference value and a temperature difference value of the measured system on line, and automatically adjusting proportional-integral-differential parameters of the measured system in different temperature difference intervals by utilizing the constant-temperature control mathematical model anda discrete domain proportional-integral-differential control formula so as to realize constant-temperature control. According to the technical scheme provided by the invention, the PID parameters areautomatically set in different temperature difference intervals by continuously detecting the temperature difference value and the temperature difference value on line, so that the hysteresis of heattransfer is overcome, and constant-temperature control is realized.

Description

technical field [0001] The invention relates to the field of industrial control, in particular to a constant temperature difference temperature control method and system thereof, industrial control equipment and a storage medium. Background technique [0002] At present, in modern industrial production, current, voltage, temperature, pressure, flow rate, flow rate and switching value are the main controlled parameters commonly used. For example: In many fields, people need to detect and control the temperature of various heating furnaces, heat treatment furnaces, reaction furnaces, boilers, and water heaters. At present, the more classic automatic temperature control algorithm for liquid heating or cooling It is a proportional-integral-derivative (PID) control algorithm. [0003] However, the best adaptation object of the PID control algorithm is a fast-response system, such as a motor. In the technical field of temperature automatic control of liquid heating (or cooling),...

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Problems solved by technology

In the technical field of automatic temperature control of liquid heating (or cooling), the timeliness of heat conduction is very poor and it is seriously affected by the external environment temperature, so the response of the controlled object is slow

When the classic PID control algorithm is used in the technical field of temperature automatic control, the serious hysteresis of the heating process (or cooling process) makes the difference between the temperature of the heat source (or the temperature of the cold source) and the actual temperature of the controlled object very large, and the temperature of the controlled object It is extremely difficult to stabilize, resulting in a long time for the temperature of the controlled object to enter a steady state, a large overshoot range, and low precision after entering a steady state

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