CN100349076C - Control method of evaporation rate in Chinese medicine production concentration process - Google Patents
Control method of evaporation rate in Chinese medicine production concentration process Download PDFInfo
- Publication number
- CN100349076C CN100349076C CNB2005100320570A CN200510032057A CN100349076C CN 100349076 C CN100349076 C CN 100349076C CN B2005100320570 A CNB2005100320570 A CN B2005100320570A CN 200510032057 A CN200510032057 A CN 200510032057A CN 100349076 C CN100349076 C CN 100349076C
- Authority
- CN
- China
- Prior art keywords
- evaporation
- control
- pid
- velocity
- dmc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001704 evaporation Methods 0.000 title claims abstract description 87
- 230000008020 evaporation Effects 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008569 process Effects 0.000 title claims abstract description 26
- 239000003814 drug Substances 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 230000004044 response Effects 0.000 claims description 5
- 238000005457 optimization Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000009499 grossing Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 229940126680 traditional chinese medicines Drugs 0.000 abstract 1
- 238000009834 vaporization Methods 0.000 description 25
- 230000008016 vaporization Effects 0.000 description 25
- 230000000694 effects Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001915 proofreading effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Feedback Control In General (AREA)
Abstract
本发明公开了一种中药生产浓缩过程中蒸发速度的控制方法，包括以下步骤：利用液位传感器检测一效蒸发室内的药液液位，并根据蒸发室内的蒸发速度与单位时间内液位变化量间的线性关系计算得出蒸发速度实际值；以蒸发速度设定值和实际值作为DMC控制器的输入，经过DMC控制计算获得相应的PID输入设定值，再将该PID输入设定值与一效蒸发室内气体温度共同作为PID控制器的输入，从而获得控制蒸发速度的管道蒸汽调节阀阀门开度控制量。本发明利用PID控制简单、参数调整方便、抗高频干扰强和预测控制跟踪性能良好和对模型失配有较强鲁棒性的优点，可精确控制中药浓缩过程中药液的蒸发速度，有助于提高中药生产的质量。
The invention discloses a method for controlling the evaporation rate in the production and concentration process of traditional Chinese medicine, which comprises the following steps: using a liquid level sensor to detect the liquid level of the medicinal liquid in a first-effect evaporation chamber, and according to the evaporation speed in the evaporation chamber and the change of the liquid level per unit time The actual value of the evaporation rate is calculated by the linear relationship between the quantities; the set value and actual value of the evaporation rate are used as the input of the DMC controller, and the corresponding PID input set value is obtained through DMC control calculation, and then the PID is input into the set value Together with the gas temperature in the first-effect evaporation chamber, it is used as the input of the PID controller, so as to obtain the valve opening control amount of the pipeline steam regulating valve to control the evaporation speed. The invention utilizes the advantages of simple PID control, convenient parameter adjustment, strong anti-high-frequency interference, good predictive control tracking performance, and strong robustness to model mismatches, and can accurately control the evaporation rate of the medicinal liquid in the process of concentrating traditional Chinese medicines, and has the advantages of Help improve the quality of traditional Chinese medicine production.
Description
Technical field
The present invention relates to a kind of Chinese medicine and produce the control method of velocity of evaporation in the concentration process.
Background technology
Along with the development of control technology, adopt advanced control system at the Chinese medicine production industry, improve science, accuracy that Chinese medicine is produced, more and more be subjected to the attention of Chinese medicine production manager.Because it is typical complex process control that Chinese medicine is produced the control of concentration section, needs the technological parameter of control to mainly contain temperature, pressure, velocity of evaporation, liquid level etc.In concentration process, exist between these parameters and influence each other, make that to set up precise math model infeasible, also make traditional pid control mode become inapplicable.Present stage, the Chinese medicine manufacturer of China generally was controlled to be the master with artificial experience in process of production, make each link of drug effect, composition and production of Chinese medicine not reach science, strict control, exist that control accuracy is low, labour intensity is big, inefficient shortcoming, seriously restricted the raising of the Chinese medicine quality of production.
Summary of the invention
The purpose of this invention is to provide a kind of Chinese medicine and produce the control method of velocity of evaporation in the concentration process.
For realizing above-mentioned purpose, the control method that this Chinese medicine is produced velocity of evaporation in the concentration process may further comprise the steps: utilize liquid level sensor to detect a soup liquid level of imitating in the vaporization chamber, and according to the velocity of evaporation in the vaporization chamber and in the unit interval linear relationship between the liquid level change amount calculate the velocity of evaporation actual value; With the input of velocity of evaporation setting value and actual value as the DMC controller, control is calculated and is obtained corresponding PID input setting value through DMC, again this PID input setting value and is imitated gas temperature in the vaporization chamber jointly as the input of PID controller, thereby obtain to control the pipeline steam regulating valve valve opening controlled quentity controlled variable of velocity of evaporation.
Above-mentioned Chinese medicine is produced in the control method of velocity of evaporation in the concentration process, and it is as follows that concrete steps are calculated in described DMC control:
Detect the actual output of velocity of evaporation, and the back of comparing with this moment velocity of evaporation predicted value constitutes the prediction output error of velocity of evaporation, this error and updating vector multiply each other as the velocity of evaporation error prediction, velocity of evaporation after model prediction obtains proofreading and correct prediction output again, and as new velocity of evaporation initial predicted value;
Following P velocity of evaporation desired output and velocity of evaporation initial predicted constantly exported the bias vector that constitutes, this bias vector carries out the control increment that dot product obtains this moment controlling object with dynamic control vector, control increment added up obtain PID control input value, this control increment and model vector multiply each other and calculate velocity of evaporation prediction output after its effect simultaneously, control vector is to utilize simulated program to determine the control coefrficient vector that the optimisation strategy of velocity of evaporation is calculated, the model coefficient vector that model vector obtains for the step response that detects generalized object and after smooth.
The present invention combines PID control and DMC PREDICTIVE CONTROL, utilize that PID control is simple, parameter adjustment is convenient, anti-high frequency interference is strong and PREDICTIVE CONTROL is applicable to Object with Time Delay, and it is good and model mismatch had advantage than strong robustness to have a tracking performance, can accurately control the velocity of evaporation of Chinese medicine concentration process herb liquid, help to improve the work efficiency of Chinese medicine concentration section.
The present invention is further illustrated with specific embodiment in conjunction with the accompanying drawings for following machine.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing and example.
Fig. 1 is a control principle block diagram of the present invention.
Fig. 2 is the control synoptic diagram that Chinese medicine is produced concentration process.
Fig. 3 is DMC prediction-PID tandem control structure figure.
Fig. 4 is a DMC-PID tandem control algolithm block diagram.
Fig. 5 is predictive control algorithm realization flow figure.
Embodiment
Referring to Fig. 1, it is the heat and mass transfer process of a complexity that two effects concentrate.In concentration process, need the technological parameter of control to mainly contain temperature, pressure, velocity of evaporation, liquid level etc.Exist between these parameters and influence each other, exist between the temperature and pressure in the vaporization chamber and intercouple, temperature has a significant impact velocity of evaporation, and have direct linear relationship between the liquid level change amount in velocity of evaporation and the unit interval vaporization chamber, and the variation of the interior liquid level of vaporization chamber influences the variation of pressure again.Hence one can see that, and in concentration process, velocity of evaporation is a very important technical parameters, and the control of velocity of evaporation is also seemed particularly important.The present invention selects one to imitate the velocity of evaporation of vaporization chamber as final controlled target.The temperature of sensor acquisition, pressure, liquid level etc. are delivered to the DMC-PID controller, calculate back output controlled quentity controlled variable controlling plumbing fixtures steam regulating valve, reach the purpose of control velocity of evaporation through DMC-PID.
With reference to accompanying drawing 2, Fig. 2 is the industry spot synoptic diagram of in the concentration process velocity of evaporation being controlled.Wherein TT is a temperature transmitter; TC is a temperature controller, adopts PID control; LT is a fluid level transmitter; LC is a fluid level controller, adopts DMC control; In this algorithm structure, earlier get one and imitate in the vaporization chamber gas temperature, restraining variation of temperature in the 1st effective evaporator at any time, and regulated rapidly by the PID controller as middle controlled variable by temperature sensor.Again with this PID closed-loop system and 1st effective evaporator together as a generalized object, control with the DMC controller, this is the second layer of control.Compare with traditional PID tandem control, both are identical on interior ring, all adopt the PID regulator, and on outer shroud, the control of DMC prediction-PID tandem has replaced pid algorithm with the DMC algorithm.
Referring to Fig. 3, control procedure of the present invention: at first set velocity of evaporation setting value w, obtain level value by a liquid level sensor of imitating in the vaporization chamber simultaneously, and according to the velocity of evaporation in the vaporization chamber and in the unit interval linear relationship between the liquid level change amount calculate velocity of evaporation actual value y, with the input of above-mentioned velocity of evaporation setting value and actual value as the DMC controller, obtain corresponding PID input setting value through the DMC control algolithm. again this PID input setting value and one is imitated gas temperature T in the vaporization chamber jointly as the input of PID controller, thereby obtain to control the valve opening controlled quentity controlled variable of velocity of evaporation.Purpose according to hierarchical control, imitate the PID tandem control loop that gas temperature biography letter G2 (s) constitutes in the vaporization chamber by PID controller and among the figure and should comprise systematic main interference, and less pure hysteresis or time constant arranged, and adopt higher controlling of sampling frequency, the fundamental purpose of control is that in time suppressing one imitates the interference that gas temperature changes in the vaporization chamber.And the biography letter G1 (s) between the velocity of evaporation of gas temperature to the effect vaporization chamber in this a PID tandem control loop and the effect vaporization chamber is together as generalized object, adopt dynamic matrix control (DMC), realize good tracking and make system that robustness preferably be arranged when model mismatch.Because the DMC algorithm can be applicable to Object with Time Delay naturally, so, adopt the control of DMC prediction-PID tandem very effective for as two effects concentrate, having large time delay, strongly disturbing industrial object.
Be described in detail in the DMC-PID control algolithm of in the concentration technology process velocity of evaporation being controlled below in conjunction with accompanying drawing 4 and accompanying drawing 5:
The On-line Control algorithm structure of entire controller as shown in Figure 4.Among the figure, thick arrow representation vector stream, thin arrow is represented scalar stream.In each sampling instant, following P velocity of evaporation desired output ω constantly
p(k) with the output of velocity of evaporation initial predicted
The bias vector that constitutes is with dynamic control vector d
TDot product obtains the control increment Δ u (k) of this moment to generalized object G (Z).This control increment is obtained controlled quentity controlled variable u (k) and is acted on generalized object G (Z) by accumulating operation on the one hand, multiplies each other with model vector a on the other hand and calculates velocity of evaporation prediction output after its effect
To next sampling instant, at first detect the actual output y (K+1) of velocity of evaporation, and with this moment velocity of evaporation predicted value
The prediction output error e (K+1) of the back formation velocity of evaporation of comparing.This error and updating vector h multiply each other as the velocity of evaporation error prediction, again the prediction of the velocity of evaporation after model prediction obtains proofreading and correct output
The displacement back is as new velocity of evaporation initial predicted value
Pass through the z among Fig. 3 again
-1Link is defined as K constantly constantly new, and whole process is online repeatedly carries out.
The DMC-PID control algolithm of in the concentration technology process velocity of evaporation being controlled specifically comprises following several steps:
(1) generalized object chooses
In concentration process, velocity of evaporation is a very important technical parameters, and the control of velocity of evaporation is also seemed particularly important.This controller promptly selects one to imitate the velocity of evaporation of vaporization chamber as controlled target.In concentration section, to Temperature Influence in the 1st effective evaporator, therefore, adopt DMC prediction-PID tandem control structure when the main interference of system is discharged from condensate water, with gas temperature in the effect vaporization chamber as secondary object, i.e. G in the accompanying drawing 4
2(Z), reacting variation of temperature in the 1st effective evaporator at any time, and by the PID regulator H in the pid loop
c(Z) regulated rapidly, the selection principle of its parameter is with traditional PID regulator.And the DMC predictive control loop selects a velocity of evaporation of imitating vaporization chamber as controlled variable, and operating mode causes to overcome, the model mismatch that interior ring can't overcome again.The DMC predictive control loop is with PTD loop and main object, promptly one imitates gas temperature in the vaporization chamber and imitates biography letter G between the velocity of evaporation of vaporization chamber
1(Z), as generalized object G (Z).
A) pid loop design
Pid loop selects a gas temperature of imitating vaporization chamber as controlled device, adopts traditional PID control strategy, realizes in slave computer.Because the sample frequency height, it is a kind of quasi-continuous control.The less secondary object G2 (s) of time lag for relative total system, PID control can obtain servo-actuated performance preferably, and the secondary interference to an effect vaporization chamber temperature that discharging causes to condensate water has good inhibitory effect.Pid parameter in the loop can adopt common engineering setting method, and is determined in conjunction with experimental formula.
Pass letter for the object in the pid loop, promptly the G2 (s) in the accompanying drawing 3 determines as follows:
Do not consider that one imitates coupling and the system disturbance between vaporization chamber room temperature θ, the pressure p, set up state equation after controlled device is oversimplified.Its state equation can be approximately:
In the formula
Be the rate of change of an effect vaporization chamber room temperature θ, u
1It is the control action of an effect steam valve.Mainly change the evaporation indoor temperature in the concentration process by regulating this parameter.
This formula is carried out Laplace transform, and the mathematical model that obtains an effect vaporization chamber room temperature is:
K
2Be temperature static gain, T
2It is temperature inertial element time constant.
B) DMC predictive control loop design
DMC PREDICTIVE CONTROL, this control are applicable to any asymptotically stable linear object in principle.At this moment, need at first measure the step response of generalized object G (Z), then as requested, take method of trial and error, the DMC design parameter of DMC predictive control loop is adjusted.Concentrate this typical industrial process for two effects, controlled device has the typical characteristics that inertia adds pure hysteresis.Because the main object in the DMC predictive control loop, i.e. G in the accompanying drawing 3
1(S) the main time lag and the large time constant part that have comprised system in.Can be similar to and think that it has following form:
(2) foundation of generalized object forecast model
Because the DMC algorithm is a kind of control based on model in the controller, and used the on-line optimization technology, compared with traditional control algolithm, it needs more off-line preliminary work to determine controller parameter, realization flow as shown in Figure 4, this mainly comprises following several respects:
A) detect the step response of generalized object and after smooth, obtain model coefficient a
1..., a
NFor the 1st effective evaporator that will control, the dynamic response of model must be smooth, measures noise and disturbs necessary filtering, otherwise can influence control of quality even cause instability.
B) utilize simulated program to determine the optimisation strategy of velocity of evaporation, calculate control coefrficient d
1..., d
p
C) select velocity of evaporation forecast model correction coefficient h
1..., h
N
After these three groups of performance coeffcient are determined, insert the internal storage location of concentration section supervisory controller, get final product real-time calling.
(3) rolling optimization and feedback compensation
The forming by initialization module and real-time control module of DMC in the controller in line computation, as shown in Figure 5.Initialization module is the actual output y (k) that detects velocity of evaporation in the first step that puts into operation, and it is set at velocity of evaporation prediction initial value
I=1 ..., N.Promptly change real-time control module over to from second step, at the visible accompanying drawing 5 of the online calculation process of each sampling instant, wherein to the velocity of evaporation predicted value of exporting future a N dimension group y (i) only need be set, the formula in the process flow diagram is successively corresponding to following formula:
In accompanying drawing 5, velocity of evaporation setting value w is definite value and inserts internal memory in advance.If the path that the velocity of evaporation setting value becomes need be set to the time can be worked out a setting value module, with at each velocity of evaporation expectation value w (i) constantly of line computation, i=1 ..., P, and replace w in the process flow diagram with this.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100320570A CN100349076C (en) | 2005-08-26 | 2005-08-26 | Control method of evaporation rate in Chinese medicine production concentration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100320570A CN100349076C (en) | 2005-08-26 | 2005-08-26 | Control method of evaporation rate in Chinese medicine production concentration process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1765373A CN1765373A (en) | 2006-05-03 |
| CN100349076C true CN100349076C (en) | 2007-11-14 |
Family
ID=36741622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100320570A Expired - Fee Related CN100349076C (en) | 2005-08-26 | 2005-08-26 | Control method of evaporation rate in Chinese medicine production concentration process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100349076C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109846A (en) * | 2011-03-01 | 2011-06-29 | 南昌弘益科技有限公司 | Intelligent automated control method for traditional Chinese medicine production |
| CN102147626B (en) * | 2011-04-28 | 2013-03-13 | 北京七星华创电子股份有限公司 | Feedforward temperature control method for cleaning liquid |
| CN103203792A (en) * | 2013-03-14 | 2013-07-17 | 刘文华 | Method and device for controlling material level of net cage for producing fiber cement board |
| CN103225799B (en) * | 2013-05-09 | 2015-05-27 | 北京四方继保自动化股份有限公司 | Method for controlling main steam temperature in thermal power plant |
| CN104167915A (en) * | 2014-08-25 | 2014-11-26 | 上海电力学院 | Method and circuit for controlling Buck DC/DC converter |
| CN104503245B (en) * | 2014-12-29 | 2017-06-06 | 浙江中控软件技术有限公司 | The control method and device of a kind of Nonself-regulating plant |
| CN104698852B (en) * | 2015-03-03 | 2017-03-15 | 北京康拓科技有限公司 | A kind of continuous sterilization self adaptation dual controller of feature based model |
| CN106129309B (en) * | 2016-08-30 | 2018-07-10 | 无锡溥汇机械科技有限公司 | A kind of lithium ion battery separator slurry spin coating amount intelligent PID control system and control method |
| EP4257949A4 (en) * | 2020-12-07 | 2024-08-21 | Hitachi High-Tech Corporation | EVAPORATION CONCENTRATION MECHANISM, ANALYSIS DEVICE COMPRISING SAME AND ASSOCIATED REGULATION METHOD |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61111101A (en) * | 1984-11-06 | 1986-05-29 | Toshiba Corp | Concentration control system of evaporator |
| CN1430945A (en) * | 2003-01-18 | 2003-07-23 | 刘燕湫 | Concentrated machine for distilling Chinese herbal medicine |
| JP2004348481A (en) * | 2003-05-22 | 2004-12-09 | Jgc Corp | Process control unit and method |
-
2005
- 2005-08-26 CN CNB2005100320570A patent/CN100349076C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61111101A (en) * | 1984-11-06 | 1986-05-29 | Toshiba Corp | Concentration control system of evaporator |
| CN1430945A (en) * | 2003-01-18 | 2003-07-23 | 刘燕湫 | Concentrated machine for distilling Chinese herbal medicine |
| JP2004348481A (en) * | 2003-05-22 | 2004-12-09 | Jgc Corp | Process control unit and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1765373A (en) | 2006-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103054152B (en) | Tobacco redryer moisture control method based on forecast Product Improve (PI) algorithm control system | |
| CN103225799B (en) | Method for controlling main steam temperature in thermal power plant | |
| CN102032640A (en) | Fuzzy proportion integration differentiation (PID) control method and device for industrial environment high-precision air conditioner | |
| CN101382773B (en) | Anti-time-delay pseudo-proportional-integral control system and method | |
| CN110764417B (en) | Linear quadratic optimal dynamic feedforward-feedback PID control system based on closed-loop identification model and control method thereof | |
| CN109581870A (en) | The temperature in the kettle dynamic matrix control method of energetic material reaction kettle | |
| CN100349076C (en) | Control method of evaporation rate in Chinese medicine production concentration process | |
| CN101433919B (en) | Control method for laminar cooling of medium plate | |
| CN112947088B (en) | Modeling and control method of temperature and humidity system based on closed space | |
| CN112180733B (en) | A fuzzy logic-based predictive control parameter setting method for building energy consumption system | |
| CN101761917A (en) | Boiler overheating steam temperature fuzzy control method | |
| CN105700380A (en) | Secondary reheating unit steam turbine speed regulation system simulation model, and modeling method therefor | |
| CN109858163A (en) | A kind of active disturbance rejection feed forward control method of lithium-bromide absorption-type refrigerating machine | |
| CN105240846A (en) | Method for controlling combustion process of circulating fluidized bed boiler on basis of multivariable generalized predictive control optimization | |
| CN104190720B (en) | A kind of self adaptation automatic thickness control method and device | |
| CN111413865B (en) | A Disturbance Compensation Single-loop Superheated Steam Temperature Active Disturbance Rejection Control Method | |
| CN105088842A (en) | Predictive control based slurrying cooking control method | |
| CN110989726A (en) | An Improved Active Disturbance Rejection Technology Temperature Control System Applied in Chemical Production | |
| CN102455718A (en) | Temperature control system in catalyst production device and method and application thereof | |
| CN203908357U (en) | Automatic control device for steam temperature-reducing and pressure-reducing system | |
| CN101963344A (en) | Reheated steam temperature control method on basis of process characteristic compensation | |
| CN102902201A (en) | Decoupling state spatial prediction control method of chemical multivariate processes | |
| CN105867125A (en) | Optimization control method and apparatus of refining apparatus coupling unit | |
| CN109870986B (en) | On-line control method of stirred tank reactor based on neural network and data drive | |
| CN112782970A (en) | Temperature self-setting method and system for GaN substrate growth heating furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: HAYAOCIHANG PHARMACEUTICAL CO.; APPLICANT Free format text: FORMER OWNER: HUNAN UNIVERSITY Effective date: 20061124 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20061124 Address after: 410011, Xin Tian mansion 86, 1103 North Shaoshan Road, Hunan, Changsha Applicant after: HAYAO CIHANG PHARMACEUTICAL Co.,Ltd. Co-applicant after: HUNAN University Address before: Yuelu District City, Hunan province 410082 Changsha Lushan Road No. 2 Applicant before: Hunan University |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |