Production line spraying and drying process temperature control method based on active-disturbance-rejection control (ADRC) technology

Abstract

Provided is a production line spraying and drying process temperature control method based on the active-disturbance-rejection control (ADRC) technology, comprising: establishing a production line spraying and drying process controlled object mathematic model; designing a temperature ADRC controller, and determining ideal adjusting parameters; determining main adjusting parameters influencing the performance of the temperature ADRC controller through simulation control of production line spraying and drying process temperatures; and constructing a production line spraying and drying process simulation experiment platform, and realizing the real time control of the temperature ADRC controller. The temperature ADRC controller comprises a transition process generator, an expansion state generator and a non-linear feedback controller; a temperature ADRC system comprises a host computer, the temperature ADRC controller, an incoming signal module, a performer, a temperature detection module and a controlled object-a resistance heating furnace. The method does not depend on the mathematic model of a controlled system, does not need to consider the non-linear control problem of the controlled system, possesses better robustness, and can greatly improve temperature control precision and product quality.

Description

technical field [0001] The invention relates to a control method, in particular to a temperature control method of a production line spraying and drying process based on an active disturbance rejection technology. Background technique [0002] In the spraying and drying process of automobile, metallurgy, chemical and other production lines, the workpiece coating process needs to go through degreasing, water washing, phosphating, moisture drying, primer spraying, primer drying, topcoat spraying, topcoat drying and other processes , in order to ensure product quality and save production costs, the spraying and drying process has very high requirements for temperature control. Generally, the temperature control accuracy is required to be at least less than +5°C, preferably within +2°C; Temperature control generally has a large time-delay phenomenon, and it is often required to control the temperature control device with a large time-delay near the set temperature value. For the...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the traditional PID controller is difficult to obtain a satisfactory control effect due to the characteristics of nonlinearity and large hysteresis in temperature control, and proposes a temperature control method for the spraying and drying process of the production line based on the active disturbance rejection technology , to obtain better control accuracy, robustness and stability than PID controllers

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