Fuzzy water temperature controller and control method based on 80C552 single chip microcomputer

Abstract

The invention provides a fuzzy water temperature controller and control method based on an 80C552 single chip microcomputer. The controller comprises the 80C552 single chip microcomputer, a forward channel module, a backward channel module, a system expanding module and a series communication module. The forward channel module, the backward channel module, the system expanding module and the series communication module are connected with the 80C552 single chip microcomputer. Initial water temperature, set water temperature and controlled practical water temperature are used as input of an electric adjusting valve control model, water temperature control is achieved by controlling the opening degree of an electric adjusting valve, the controlled practical water temperature is compared with the set water temperature, the difference amount and the opening degree value of the electric adjusting valve are used as input of the water temperature controller based on fuzzy inference, after fuzzy inference is carried out on the input, the controlled practical water temperature is obtained, and the water temperature is continuously amended through a continuous feedback process to reach the expected set temperature. The fuzzy logical reasoning ability is achieved, the control function on analog quantity and output quantity is achieved, compatibility is good, and water temperature control is achieved through a fuzzy algorithm.

Description

technical field [0001] The invention relates to a water temperature controller, in particular to a fuzzy water temperature controller based on a single-chip microcomputer. Background technique [0002] As an important part of the field of automatic control, fuzzy control technology has made great progress in its research and application in recent decades. The water temperature controller generally adopts the temperature sensor as the measuring device, and adopts PID control for the deviation signal of the measured quantity to realize the 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 method has good control performance after stabilization, but it has strong limitations when it cannot obtain an accurate mathematical description of the controlled object, which makes the design of the above strategy somewhat inadaptable, and thus affects the water te...

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Problems solved by technology

This method has good control performance after stabilization, but it has strong limitations when it cannot obtain an accurate mathematical description of the controlled object, which makes the design of the above strategy somewhat inadaptable, and thus affects the water temperature control accuracy and feasibility

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