Temperature control method based on fuzzy self-adaptive controller

A temperature control method and fuzzy self-adaptive technology, applied in the direction of self-adaptive control, general control system, control/regulation system, etc., can solve the problems of uncertainty of system model parameters, nonlinearity, large lag of electric heating system, etc. The effect of industrial production efficiency, precise temperature control and flexible control

Inactive Publication Date: 2014-07-23
NORTHWEST A & F UNIV
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Problems solved by technology

[0003] In some productions that require manual feeding, it is difficult to ensure the uniformity of the weight and volume of each feed, resulting in uncertain system model parameters. At the same time, the electric heating system itself with ordinary control has the characteristics of large hysteresis and nonlinearity. control, performance is difficult to guarantee

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  • Temperature control method based on fuzzy self-adaptive controller
  • Temperature control method based on fuzzy self-adaptive controller
  • Temperature control method based on fuzzy self-adaptive controller

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Embodiment Construction

[0028] A temperature control method based on a fuzzy adaptive controller is realized by a fuzzy adaptive controller 1 , a three-phase voltage regulating module 2 , a heating module 3 , and a temperature sensor 4 .

[0029] Fuzzy adaptive controller 1 is composed of generalized predictive control 5 and fuzzy control 6 .

[0030] Fuzzy adaptive controller 1 has a soft switch E 0 , E 0 Can be a constant value, variable or function, when the error |e|≤E 0 , the switch switches to generalized predictive control 5; when the error |e|>E 0 , switch to Fuzzy Control 6.

[0031] Generalized predictive control 5 its algorithm is designed as:

[0032] Take the initial value P(0)=10 6 I, θ(0)=[0,0,0,0,0,0] T , forgetting factor λ=0.95, control its parameter N=8, control weight matrix Γ as unit matrix I 5×5 , the output softening factor α=0.7, the generalized predictive control algorithm is as follows:

[0033] 1) Sampling the current actual output y(k) and the reference output y r...

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Abstract

The invention discloses a temperature control method based on a fuzzy self-adaptive controller. The temperature control method is realized via the fuzzy self-adaptive controller, a three-phase voltage-regulating module, a heating module and a temperature sensor. The fuzzy self-adaptive controller is composed of generalized prediction control and fuzzy control. The fuzzy self-adaptive controller is generated via combination of the generalized prediction control and the fuzzy control. The generalized prediction control or the fuzzy control are selected by the fuzzy self-adaptive controller to realize flexible control of a heating system according to different error situations of the system so that heating is more uniform, temperature control is more accurate and thus industrial production efficiency is enhanced.

Description

Technical field: [0001] The patent of the present invention relates to a temperature control method, in particular to the design of a fuzzy adaptive controller. Background technique: [0002] In industrial production, some processing techniques have strict requirements on heating temperature. Too high or too low temperature may cause immeasurable losses, so how to strictly control the temperature has become an important issue. Commonly controlled electric heaters have a wide heating range. When industrial production requires high temperature control, common controlled electric heaters often cannot meet the more precise control requirements, and in some industrial production, common controlled electric heaters are used. Electric heaters are easy to cause uneven heating, resulting in poor heating effect. [0003] In some productions that require manual feeding, it is difficult to ensure the uniformity of the weight and volume of each feeding, resulting in uncertain system mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 薛运田陈帝伊张阳张振铎
Owner NORTHWEST A & F UNIV
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