Heating furnace temperature control method based on novel two-degree-of-freedom internal mold PID

Abstract

The invention discloses a heating furnace temperature control method based on a novel two-degree-of-freedom internal mold PID. The method comprises the following steps of: step 1, designing an internal model control structure; step 2, designing an improved two-degree-of-freedom internal mold control structure; and step 3, designing and tuning a controller for a stabilization process. The method improves the two-degree-of-freedom internal mold control structure, and adds a weighting factor to the parameters of a set point tracking controller, which facilitates on-line tuning and achieves good set point tracking. The equivalent design of the controller is adopted in the form of different PID controllers for a first-order time-delay process and a second-order time-delay process, so that eachtuning parameter of the controller is obtained simply and conveniently. Moreover, a system can meet both good tracking performance and interference suppression performance, and the control requirements of the system also can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of automation and relates to a method for controlling the temperature of a heating furnace based on a novel two-degree-of-freedom internal model PID. Background technique [0002] In the actual control process, the PID controller has a high usage rate in the industrial production process, but as the requirements for product control accuracy and safe operation are getting higher and higher, ordinary PID controllers often cannot meet the requirements. For the process with time-delay model uncertainty / mismatch, the control method designed is often more complicated, and can not take into account the set point tracking characteristics and anti-interference characteristics at the same time, so the study of a new two-degree-of-freedom internal model PID control method is Necessary. Contents of the invention [0003] The purpose of the present invention is to solve the problems of the traditional two-degree-of-fr...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of the traditional two-degree-of-freedom internal model control method in industrial process production, such as large time lag, insufficient control accuracy, complex controller design, uncertain / mismatched models, etc., and proposes a new two-degree-of-freedom based The heating furnace temperature control method of internal mold PID

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