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High-precision constant-temperature controller and method based on fuzzy self-adaptive PID control

A fuzzy self-adaptive, constant temperature controller technology, applied in auxiliary controllers with auxiliary heating devices, temperature control using electric methods, etc., can solve problems such as PID parameters cannot meet system requirements, and achieve reliable scientific experimental basis, Precise control of effects, ensuring high reliability of effects

Active Publication Date: 2015-11-25
NANJING HANZHILI SCI & TECH CO LTD
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Problems solved by technology

When the control object has great time-varying and nonlinear conditions, a set of well-tuned PID parameters is far from meeting the requirements of the system

Method used

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  • High-precision constant-temperature controller and method based on fuzzy self-adaptive PID control
  • High-precision constant-temperature controller and method based on fuzzy self-adaptive PID control
  • High-precision constant-temperature controller and method based on fuzzy self-adaptive PID control

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Embodiment Construction

[0026] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0027] The present invention is based on figure 1 The shown constant temperature controller is implemented. The system adopts modular design and consists of four parts: STM32F103VET6 main control chip, temperature data acquisition module, heating and cooling module, input and display module. Among them, the temperature data acquisition module uses a thermocouple temperature sensor to measure the furnace temperature in the heating furnace, and the heating and cooling module uses 6 small, high-precision, adjustable heating power radiant tubes to realize the heating function. The material of the radiant tubes is alumina ; The cooling function is realized by the freq...

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Abstract

The invention discloses a high-precision thermostat and method based on fuzzy self-adaptive PID control, and belongs to the technical field of automatic control. The control method comprises a model establishment step, a fuzzy PID self-adaptive control step, a Kalman filtering step and an object control step. The thermostat comprises a master control chip, a temperature data acquisition module, a heating and cooling module and an input and display module. According to the invention, data fusion is performed on a theoretical temperature value of the fuzzy self-adaptive PID control and a temperature value measured by a thermocouple through a Kalman filtering algorithm and the heating and cooling module is driven to realize accurate temperature control, such that the constant-temperature controller has a quite accurate control effect, and the error rate is only 0.02%.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to a high-precision constant temperature controller and a control method based on fuzzy self-adaptive PID control. Background technique [0002] Temperature control plays an important role in the fields of industrial and agricultural production, national defense, scientific research and daily life, and is one of the more common and basic process parameters in industrial and agricultural production and life. In the chemical production process, temperature is a very critical control object. At present, the PID algorithm is still widely used, and there are many methods for setting PID parameters, but most of them are based on objects. PID controller has become one of the main technologies of industrial control due to its simple structure, good stability, reliable operation and convenient adjustment. When the structure and parameters of the controlled object cann...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/32
Inventor 孙铭荣周翟和吕建新
Owner NANJING HANZHILI SCI & TECH CO LTD
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