Predictive control method for temperature in gas phase replacement moistening process of traditional Chinese medicine decoction pieces

A technology of traditional Chinese medicine decoction and predictive control, which is applied in the direction of temperature control by electric method, auxiliary controller with auxiliary heating device, etc., which can solve the problem of difficult temperature control

Active Publication Date: 2019-01-15
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0003] Aiming at the problem that the temperature is difficult to control in the process of gas-phase replacement and moistening of traditional Chinese medicine decoction pieces, the pre...

Method used

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  • Predictive control method for temperature in gas phase replacement moistening process of traditional Chinese medicine decoction pieces
  • Predictive control method for temperature in gas phase replacement moistening process of traditional Chinese medicine decoction pieces
  • Predictive control method for temperature in gas phase replacement moistening process of traditional Chinese medicine decoction pieces

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Embodiment Construction

[0046] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0047] refer to Figure 1 ~ Figure 4 , a method for temperature prediction and control of the process of gas-phase displacement and moistening of Chinese medicinal decoction pieces, said method comprising the steps of:

[0048] 1) Given the desired temperature value r of the decoction pieces of Chinese herbal medicine in the gas-phase replacement moistening chamber, by increasing the opening of the steam valve by one degree, record the unit step response sequence of the temperature in the moistening chamber {a 1 ,a 2 ,...,a n};

[0049] 2) Establish a prediction model, the prediction model adopts a step response model, referring to formula (1):

[0050]

[0051] Among them, y(k) is the temperature output value of the moistening chamber at time k, Δu(k-i) is the variation of steam valve opening at time k-i, a i is the temperature step res...

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Abstract

The invention discloses a predictive control method for the temperature in the gas phase replacement moistening process of traditional Chinese medicine decoction pieces. The method comprises the following steps: using a unit step response model for the temperature of a traditional Chinese medicine decoction piece moistening room and the opening of a steam valve as a dynamic prediction model according to the temperature control structure of the gas phase replacement moistening process of the traditional Chinese medicine decoction pieces; minimizing secondary performance index functions of the temperature tracking deviation of the moistening room and the opening variation of the steam valve in a future period of time; and calculating the opening variation of the steam valve in the gas phasereplacement moistening process of the traditional Chinese medicine decoction pieces in real time to realize the optimal automatic control of the moistening temperature tracking set value in the gas phase replacement moistening process of the traditional Chinese medicine decoction pieces. Through adoption of the method, the problem that the temperature of the gas phase replacement moistening process of traditional Chinese medicine decoction pieces is difficult to control is solved; the softening process of the traditional Chinese medicine decoction pieces can be better controlled; the effectiveingredients are kept to the maximum extent; the clinical efficacy is improved; and the product loss rate is reduced.

Description

technical field [0001] The invention belongs to the field of automatic control of the production process of decoction pieces of traditional Chinese medicine, and relates to a method for temperature prediction and control of the decoction pieces of Chinese medicine in the vapor phase replacement and moistening process. Background technique [0002] Chinese herbal decoction pieces are finished products after special processing of Chinese herbal medicines. They are the material basis of TCM syndrome differentiation and treatment. In the field of Chinese herbal decoction pieces processing, the moistening process of Chinese herbal medicines has always been a very critical process in the production of Chinese herbal decoction pieces. The moisturizing process of Chinese medicinal materials will directly affect the quality of the processing process, and then affect the quality of Chinese herbal pieces. The gas phase replacement method is one of the most commonly used methods in the...

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Application Information

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IPC IPC(8): G05D23/32
CPCG05D23/32
Inventor 何德峰彭彬彬余世明郑雅羽朱威杨永祥李行诺
Owner ZHEJIANG UNIV OF TECH
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