Modeling and control method of temperature and humidity system based on closed space

Abstract

The invention discloses a modeling and control method for a temperature and humidity system based on a closed space. The method comprises the following steps of S1, building a temperature and humidity system model of the closed space based on a mechanism analysis method and a step response system identification method; S2, designing a control system decoupler of the temperature and humidity system by using a feedforward compensation decoupling method; S3, designing a fuzzy adaptive PID control system of the temperature and humidity system based on fuzzy control and PID control; and S4, setting a fuzzy control rule MATLAB simulation and a control system Simulink simulation. According to the modeling and control method for the temperature and humidity system in the closed space, problems that a traditional PID algorithm is insufficient in anti-interference capacity and a conventional decoupling method is poor in effect are solved, and it is verified through experiments that the modeling and control method has the good effect on control precision and system stability of a temperature and humidity controller; and meanwhile, the anti-interference performance of the system is also improved.

Description

technical field [0001] The invention relates to the technical field of temperature and humidity automatic control, in particular to a modeling and control method of a temperature and humidity system based on a closed space. Background technique [0002] The research on temperature and humidity control system in confined space is of great significance both in industry and in our daily life. In many production processes, the two physical quantities of temperature and humidity directly affect production efficiency, product quality and service life. [0003] The current temperature and humidity control is not very effective for some complex system control, especially for large time-delay and time-varying systems, the adaptation effect is relatively poor, and the self-adaptive ability is not good. [0004] There are many methods of temperature and humidity control in confined spaces, the most commonly used of which are switch control and PID control. On-off control is the simpl...

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Problems solved by technology

Switch control is the most simple and direct control method, but its control precision is low, the stability is poor, and it is easy to cause the system to overshoot and oscillate; The three parameters can be adjusted accordingly to obtain a satisfactory control effect; however, the PID controller is more dependent on an accurate system model, and its control effect is not ideal for systems whose models are difficult to determine

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