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Pressure prediction control method of traditional Chinese medicine decoction pieces in demulcen process by gas phase replacement

A technology of traditional Chinese medicine decoction pieces and process pressure, which is used in fluid pressure control, electric fluid pressure control, non-electric variable control and other directions, and can solve problems such as difficult pressure 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 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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  • Pressure prediction control method of traditional Chinese medicine decoction pieces in demulcen process by gas phase replacement
  • Pressure prediction control method of traditional Chinese medicine decoction pieces in demulcen process by gas phase replacement
  • Pressure prediction control method of traditional Chinese medicine decoction pieces in demulcen process by gas phase replacement

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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

The invention relates to a pressure prediction control method of traditional Chinese medicine decoction pieces in the demulcen process by gas phase replacement. According to a pressure control structure of the traditional Chinese medicine decoction pieces in the demulcen process by gas phase replacement, a unit impulse response model of the pressure of a demulcen chamber of the traditional Chinesemedicine decoction pieces and steam valve opening is adopted as a dynamic prediction model, by minimizing a quadratic form performance index function of pressure tracking deviation of the demulcen chamber and the steam valve opening quantity in a period of time in the future, real-time calculation of the steam valve opening size of the traditional Chinese medicine decoction pieces in the demulcenprocess by gas phase replacement is realized, and optimized automatic control of a setting value of demulcen pressure tracking of the steam valve opening size of the traditional Chinese medicine decoction pieces in the demulcen process by gas phase replacement is realized. The pressure prediction control method of the traditional Chinese medicine decoction pieces in the demulcen process by gas phase replacement has good dynamic performance, intuitive algorithm concept and is easy to adjust.

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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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
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