Variable air volume room temperature control method based on fuzzy PID and prediction control algorithm

Abstract

The invention discloses a variable air volume room temperature control method based on fuzzy PID and a prediction control algorithm. The method comprises the steps that the temperature deviation between an expected room temperature and an actual room temperature is input to a fuzzy adaptive PID controller, PID parameter incremental quantity of the opening degree of a tail end air valve is obtained through calculation, and calibrated opening degree of the tail end air valve is output; the opening degree of the tail end air valve of the fuzzy adaptive PID controller is subtracted from the opening degree of the tail end air valve of a previous moment by utilizing a time delay link to obtain the variable quantity of the opening degree of the tail end air valve; the prediction control algorithm is adopted to obtain the actual opening degree of the tail end air valve through the variable quantity of the opening degree of the tail end air valve, and the room temperature is maintained at a set value and is kept unchanged. The control method combining the fuzzy PID with the prediction control algorithm is adopted to solve the technical problems that parameter setting difficulty is large, working condition adaptive capacity is poor, and adaptive ability is weak in an air conditioning system in the prior art.

Description

technical field [0001] The invention relates to a room temperature control method, in particular to a variable air volume room temperature control method based on fuzzy PID and predictive control algorithm. Background technique [0002] For variable air volume air conditioning systems, there are many control methods, such as conventional PID, fuzzy PID, and neural network control methods, which have become relatively common control technologies. The requirements are very high, so for the variable air volume air conditioner with characteristics such as large time lag and nonlinearity, it is very difficult to set parameters. Although the fuzzy PID control method developed on the basis of the conventional PID control method can adapt to the nonlinearity of the room temperature control of the air-conditioning system to a certain extent, because the fuzzy PID mainly uses the fuzzy rule base derived from the experience of experts, in engineering practice In the application of the...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a variable air volume room temperature control method based on fuzzy PID and predictive control algorithm, and solve the problems of difficulty in parameter setting of the air conditioning system in the prior art, poor adaptability to working conditions, and self-adaptation. Incompetent technical issues

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