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Water temperature control method and control system thereof based on adaptable fuzzy PID

A water temperature control method, adaptive fuzzy technology

Inactive Publication Date: 2016-06-01
SOUTHWEST UNIVERSITY
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Problems solved by technology

[0003] This application provides a water temperature control method based on adaptive fuzzy PID and its control system, and uses the fuzzy PID controller composed of fuzzy control and PI algorithm in the PID algorithm to monitor and adjust the water temperature in real time to solve the current manual Adjusting or automatically adjusting the water temperature of the water heater will not only cause waste of water resources, but also the control accuracy is not high, resulting in a large error between the actual water temperature and the expected water temperature value.

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  • Water temperature control method and control system thereof based on adaptable fuzzy PID
  • Water temperature control method and control system thereof based on adaptable fuzzy PID
  • Water temperature control method and control system thereof based on adaptable fuzzy PID

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Embodiment

[0033] A water temperature control method based on adaptive fuzzy PID, using a fuzzy PID controller composed of fuzzy control and PI algorithm in the PID algorithm to monitor and adjust the water temperature in real time. PID algorithm is a very widely used control method. For a linear system, PID parameters can be obtained by specifying the closed-loop pole. In the present invention, since a mechanical solenoid valve is used, it is difficult to ensure the accuracy of the solenoid valve switch, then the differential link of the PID will be affected by the low accuracy and interfere with the stability of the system, so the water temperature control method of the present invention is abandoned. In the differential link, the PI algorithm is used to control the water temperature.

[0034] Such as figure 1 As shown, it specifically includes the following steps:

[0035] S1: Get the preset water temperature T 0 , to obtain the cold water temperature T detected by the first temper...

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Abstract

The invention provides a water temperature control method and a control system thereof based on adaptable fuzzy PID. Fuzzy control and a PI algorithm in the PID algorithm are combined to form a fuzzy PID controller to carry out real-time monitoring and adjusting on the water temperature, that is, a microprocessor acquires cold water temperature, hot water temperature and mixed warm water outlet temperature in real time, the mixed warm water outlet temperature is compared with the preset temperature, the fuzzy PID algorithm is used for controlling flow speeds of the cold water and the hot water, and thus the mixed warm water outlet temperature is constant. The temperature adjustment reaction is quick, and the accuracy is high.

Description

technical field [0001] The invention relates to the field of water temperature control, in particular to a water temperature control method based on an adaptive fuzzy PID and a control system thereof. Background technique [0002] The water temperature adjustment of traditional bathrooms is generally to install a cold and hot water adjustment device. At present, there are two common types of manual adjustment and automatic adjustment. Manual adjustment is to adjust the mixed water by controlling the opening of the cold and hot water valves. Temperature, this control method wastes water resources, and the water temperature fluctuates greatly. Automatic control generally uses a temperature sensor as a measuring device, and uses PID control for the deviation signal of the measured quantity to realize water temperature control. The control strategies adopted by current controllers are realized on the basis of known precise mathematical models of the controlled objects. This me...

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Application Information

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IPC IPC(8): G05D23/20G05B13/04
CPCG05B13/0265G05B13/042G05D23/1919G05D23/20
Inventor 段书凯郭秀珍何真承
Owner SOUTHWEST UNIVERSITY
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