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A method for predicting and controlling the pressure in the gas-phase replacement and moistening process of traditional Chinese medicine decoction pieces

A technology of traditional Chinese medicine decoction pieces and process pressure, which is applied in the direction of fluid pressure control, electric fluid pressure control, control/regulation system, etc., and can solve problems such as difficult pressure control.

Active Publication Date: 2021-04-06
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0003] Aiming at the problem that the pressure is difficult to control in the process of gas-phase displacement of traditional Chinese medicine decoction pieces, the present invention proposes a pressure model algorithm predictive control method with good dynamic performance, intuitive algorithm concept and easy adjustment

Method used

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  • A method for predicting and controlling the pressure in the gas-phase replacement and moistening process of traditional Chinese medicine decoction pieces
  • A method for predicting and controlling the pressure in the gas-phase replacement and moistening process of traditional Chinese medicine decoction pieces
  • A method for predicting and controlling the pressure in the gas-phase replacement and moistening process of traditional Chinese medicine decoction pieces

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Embodiment Construction

[0042] The method of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] refer to Figure 1 to Figure 4 Shown is a pressure prediction control method for the process of gas-phase replacement and moistening of traditional Chinese medicine decoction pieces, said method comprising the following steps:

[0044] 1) Given the desired pressure value r of the decoction pieces of traditional Chinese medicine to replace the moistening chamber by gas phase, by increasing the opening of the steam valve by one degree, record the unit impulse response sequence of the pressure in the moistening chamber {a 1 ,a 2 ,...,a n};

[0045] 2) Establish a predictive model, the predictive model adopts an impulse response model, referring to formula (1):

[0046]

[0047] Among them, y(k) is the pressure output value of the moistening chamber at time k, u(k-i) is the steam valve opening amount at time k-i, a i is the pressure p...

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Abstract

A pressure prediction control method for the process of gas-phase displacement of Chinese herbal decoction pieces for moistening medicine. According to the pressure control structure of the process of gas-phase displacement of Chinese medicine decoction pieces for moistening medicine, the unit impulse response model of the pressure of the decoction pieces of Chinese medicine and the opening of the steam valve is used as the dynamic prediction model. Calculate the quadratic performance index function of the pressure tracking deviation of the moistening chamber and the opening of the steam valve in a certain period of time in the future, and calculate the opening degree of the steam valve in the process of gas-phase displacement of traditional Chinese medicine decoction pieces in real time, so as to realize the moistening process of traditional Chinese medicine decoction pieces. Optimized automatic control of medicine pressure tracking setpoint. The invention has good dynamic performance, intuitive algorithm concept and easy adjustment.

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 predicting and controlling the pressure of the decoction pieces of Chinese medicine in the process of gas-phase displacement and moistening. 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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D16/20
CPCG05D16/208
Inventor 何德峰彭彬彬徐建明郑雅羽朱威杨永祥李行诺
Owner ZHEJIANG UNIV OF TECH