CN103704875B - A kind of high accuracy tobacco-shred water control method and control system thereof - Google Patents
A kind of high accuracy tobacco-shred water control method and control system thereof Download PDFInfo
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- CN103704875B CN103704875B CN201210380563.9A CN201210380563A CN103704875B CN 103704875 B CN103704875 B CN 103704875B CN 201210380563 A CN201210380563 A CN 201210380563A CN 103704875 B CN103704875 B CN 103704875B
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Abstract
The present invention relates to a kind of high accuracy tobacco-shred water control method, comprise the following steps: 1 moisture deviation and deviation variation rate computing unit obtain moisture in cut tobacco deviate, deviation variation rate and deviation precision; 2 echelon selection units control moisture in cut tobacco and regulate; 3 add anti-interference momentum control unit according to step 1 pair feedback revises amount of water; 4 add anti-interference momentum control unit according to step 2 pair feedback adds disturbance quantity in the output valve of moisture control subsystem, strengthens stability and the precision of moisture control.The invention still further relates to a kind of high accuracy moisture in cut tobacco control system, comprising: moisture deviation and deviation variation rate computing unit, echelon selection unit and two feedback add anti-interference momentum control unit; Moisture deviation and deviation variation rate computing unit obtain moisture in cut tobacco deviate, deviation variation rate and deviation precision; Echelon selection unit controls moisture in cut tobacco and regulates; Two feedback adds stability and the precision of the control of anti-interference momentum control unit final moisture.
Description
Technical field
The present invention relates to a kind of tobacco-shred water control method and control system thereof, be specifically related to a kind of point of echelon, high-precision moisture in cut tobacco autocontrol method that two feedback adds anti-interference momentum and control system thereof.
Background technology
The present invention is applicable to current tobacco processing line moisture in cut tobacco and controls.Current scrap prodn. line moisture control subsystem may occur shaking even unstability in the mediation process controlling moisture error, its reason is owing to there being comparatively Great inertia link or have lag module in systems in which, we can be called the dynamic characteristic of control procedure, consider the dynamic characteristic of moisture control procedure, usual dynamic characteristic is divided into initial adjustment process successively, turnover, transient process, the steady process that becomes and system stability process four echelons, if because apply the circuit controls of identical parameter in different echelons, very large impact can be caused to the stability of system.Moreover in control procedure, there is the disturbance of external environment, also very unfavorable to the stability of control accuracy requirement and system.
In current technology, when moisture in cut tobacco control system detects that the actual moisture of pipe tobacco and moisture content of outlet setting value have a deviation, PID controller input to the initial value correction that adds water, in moisture in cut tobacco control procedure, moisture value+correction value before the setting value of process amount of water=add water.And PID controller is according to the actual discharge that adds of moisture in cut tobacco, send control signal to go to regulate, solve on-the-spot disturbance factor, ensure that actual amount of water trends towards the setting value of process amount of water, thus ensure that the stability of pipe tobacco moisture content of outlet, usual said moisture list closed-loop control that Here it is.
But current normal moisture list closed-loop control cannot solve the circuit controls applying identical parameter in different echelons can cause very large impact problem on the stability of system.
Therefore, stability in moisture control procedure and high precision is solved with regard to the control method needing a kind of point of echelon, two feedback adds anti-interference momentum.
Summary of the invention
The technical problem that will solve of the present invention is to provide a kind of point echelon of moisture in cut tobacco, two feedback adds anti-interference momentum, can solve pipe tobacco wild effect in process of production, the control method improving the moisture control accuracy of pipe tobacco and control system thereof.
In order to solve the problems of the technologies described above, technical scheme of the present invention is, a kind of high accuracy tobacco-shred water control method, comprises the following steps:
Step one, collection pipe tobacco initial water divided data, the data collected are transferred to moisture deviation and deviation variation rate computing unit, the moisture value of described pipe tobacco initial water divided data and process control needs is made difference and is calculated moisture in cut tobacco deviate, deviation variation rate and deviation precision by this moisture deviation and deviation variation rate computing unit;
Step 2, described moisture in cut tobacco deviate and deviation variation rate are transferred to echelon selection unit, this echelon selection unit controls the moisture in cut tobacco in different echelon situation and regulates;
Step 3, the deviation precision obtained according to step one, the precision pid control module being added anti-interference momentum control unit by two feedback controls, and revises amount of water.
Described step 2 comprises the following steps:
(1) when echelon selection unit judges that moisture deviation and rate of change are when being greater than 90% scope, the proportionality coefficient controlling setting according to moisture provides moisture controlled quentity controlled variable, if moisture regulates the proportionality coefficient not reaching described setting in 200 seconds, then moisture control subsystem proportionality coefficient should be increased and be twice, otherwise, then proportionality coefficient should be reduced one times;
(2) when echelon selection unit judges that moisture deviation and deviation variation rate are between 45% ~ 90%, reduce the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
(3) when echelon selection unit judges that moisture deviation and deviation variation rate are between 10% ~ 45%, increase the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
(4) select unit judges when echelon and go out moisture deviation and deviation variation rate when being less than 10% scope, adopt the closed-loop control of moisture list;
(5) described echelon selection unit obtains the Parameters variation situation affecting moisture control subsystem stability under different echelon.
Also comprise:
Step 4, the Parameters variation situation affecting moisture control subsystem stability obtained according to step 2, the anti-interference pid control module that two feedback adds anti-interference momentum control unit adds disturbance quantity in the output valve of moisture control subsystem, strengthens stability and the precision of moisture control.
The described parameter affecting moisture control subsystem stability comprise water pressure change, steam pressure change, humidity discharging throttle opening.
Described initial water divided data comprise add water before moisture value, add water after moisture value and add discharge.
The proportionality coefficient of described setting is 1.5%.
A kind of high accuracy moisture in cut tobacco control system, comprising: moisture deviation and deviation variation rate computing unit, echelon selection unit and two feedback add anti-interference momentum control unit;
The moisture value of the pipe tobacco initial water divided data collected and process control needs is made difference and is calculated moisture in cut tobacco deviate, deviation variation rate and deviation precision by described moisture deviation and deviation variation rate computing unit;
Described echelon selection unit controls according to the moisture in cut tobacco deviate obtained from moisture deviation and deviation variation rate computing unit, deviation variation rate the moisture in cut tobacco in different echelon situation and regulates, and obtains the Parameters variation situation affecting moisture control subsystem stability simultaneously;
Described two feedback adds anti-interference momentum control unit and comprises precision pid control module and anti-interference pid control module;
Precision pid control module obtains the deviation precision come by moisture deviation and the transmission of deviation variation rate computing unit, and then revises amount of water;
Described anti-interference pid control module slave ladder sub-cell obtains the Parameters variation situation affecting moisture control subsystem stability, and then adds disturbance quantity in the output valve of moisture control subsystem, strengthens stability and the precision of moisture control.
Described echelon selection unit judges that moisture deviation and deviation variation rate are when being greater than in 90% scope, the proportionality coefficient controlling setting according to moisture provides moisture controlled quentity controlled variable, if moisture regulates the proportionality coefficient not reaching described setting in 200 seconds, then moisture control subsystem proportionality coefficient should be increased and be twice, otherwise, then proportionality coefficient should be reduced one times;
When described echelon selection unit judges that moisture deviation and deviation variation rate are between 45% ~ 90%, reduce the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
When described echelon selection unit judges that moisture deviation and deviation variation rate are between 10% ~ 45%, increase the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
Described echelon selection unit judges that moisture deviation and deviation variation rate are when being less than in 10% scope, adopt the closed-loop control of normal moisture list.
Beneficial effect of the present invention: (1) solves pipe tobacco wild effect in process of production; (2) improve the moisture control accuracy of pipe tobacco, make moisture in cut tobacco from raising 3% ~ 5% original basis; (3) interference of external environment in process of production to moisture in cut tobacco is solved.
Accompanying drawing explanation
Fig. 1 is the dynamic characteristic figure related in a kind of high accuracy tobacco-shred water control method of the present invention;
Fig. 2 is a kind of high accuracy moisture in cut tobacco of the present invention control system schematic diagram.
Wherein, 1 is moisture deviation and deviation variation rate computing unit; 2 is echelon selection unit; 3 is that two feedback adds anti-interference momentum control unit; 301 is precision pid control module; 302 is anti-interference pid control module.
Detailed description of the invention
Below in conjunction with Fig. 1, Fig. 2 and embodiment, the present invention is described further.
A kind of high accuracy tobacco-shred water control method of the present invention, comprises the following steps:
Step one, by instrument to collect pipe tobacco initial water divided data, comprise moisture value before adding water, add water after moisture value and add discharge; The pipe tobacco initial water divided data collected is transferred to moisture deviation and deviation variation rate computing unit 1, and the moisture value of described moisture in cut tobacco data and process control needs is made difference and is calculated moisture in cut tobacco deviate, deviation variation rate and deviation precision by this moisture deviation and deviation variation rate computing unit 1;
Step 2, described moisture in cut tobacco deviation and deviation variation rate are transferred to echelon selection unit 2, by echelon selection unit 2, the moisture in cut tobacco of (as shown in Figure 1) in different echelon situation are controlled and regulated, comprising the following steps:
(1) when echelon selection unit 2 judges moisture deviation and rate of change is larger, be in the initial adjustment process of moisture in cut tobacco control system, the proportionality coefficient controlling according to moisture to set is provided moisture controlled quentity controlled variable by system, if moisture regulates the proportionality coefficient not reaching described setting in 200 seconds, even moisture regulates and rises too slow or flex point is too low, then moisture control subsystem proportionality coefficient should be increased and be twice, otherwise, then proportionality coefficient should be reduced one times; The proportionality coefficient of described setting is 1.5%.
(2) when echelon selection unit 2 judges that moisture deviation and deviation variation rate are between 45%-90%, be in system turnover, transient process, now moisture value Comparison of Gardening Activities above setting value is frequent, system response time is very fast, then reduce the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
(3) when echelon selection unit 2 judges that moisture deviation and deviation variation rate are between 10%-45%, be in steady process, the response time of the moisture now in moisture control subsystem is slower, moisture value is more frequent in setting value underside, then increase the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
(4) select unit 2 when echelon and judge that moisture deviation and deviation variation rate are when being less than in 10% scope, are in system stability process, adopt the closed-loop control of normal moisture list;
(5) described echelon selection unit 2 obtains the Parameters variation situation affecting moisture control subsystem stability under different echelon, comprises the pressure changing of water, steam pressure situation of change, humidity discharging throttle opening situation;
Step 3, the deviation precision obtained according to step one, the precision pid control module 301 being added anti-interference momentum control unit 3 by two feedback controls, and revises amount of water;
Step 4, select the Parameters variation situation affecting moisture control subsystem stability that obtains according to the echelon of step 2, the anti-interference pid control module 302 that two feedback adds anti-interference momentum control unit 3 adds disturbance quantity in the output valve of moisture control subsystem, strengthens stability and the precision of moisture control.
As shown in Figure 2, a kind of high accuracy moisture in cut tobacco control system, comprising: moisture deviation and deviation variation rate computing unit 1, echelon selection unit 2 and two feedback add anti-interference momentum control unit 3;
The moisture value of the data that instrument to collect obtains by described moisture deviation and deviation variation rate computing unit 1 and process control needs is made difference and is calculated moisture in cut tobacco deviate, deviation variation rate and deviation precision;
Described echelon selection unit 2 controls according to the moisture in cut tobacco deviate obtained from moisture deviation and deviation variation rate computing unit 1, deviation variation rate the moisture in cut tobacco in different echelon situation and regulates, and obtains the Parameters variation situation affecting moisture control subsystem stability simultaneously;
Described two feedback adds anti-interference momentum control unit 3 and comprises precision pid control module 301 and anti-interference pid control module 302;
Precision pid control module 301 obtains and transmits by moisture deviation and deviation variation rate computing unit 1 the deviation precision come, and then revises amount of water, i.e. usual said moisture list closed-loop control;
Described anti-interference pid control module 302 slave ladder sub-cell 2 obtains the Parameters variation situation affecting moisture control subsystem stability, and then adds disturbance quantity in the output valve of moisture control subsystem, strengthens stability and the precision of moisture control.
Described echelon selection unit 2 judges that moisture deviation and deviation variation rate are when being greater than in 90% scope, be in the initial adjustment process of moisture in cut tobacco control system, the proportionality coefficient controlling according to moisture to set is provided moisture controlled quentity controlled variable by system, if moisture regulates the proportionality coefficient not reaching described setting in 200 seconds, then moisture control subsystem proportionality coefficient should be increased and be twice, otherwise, then proportionality coefficient should be reduced one times;
When described echelon selection unit 2 judges that moisture deviation and deviation variation rate are between 45% ~ 90%, be in system turnover, transient process, system will reduce the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
When described echelon selection unit 2 judges that moisture deviation and deviation variation rate are between 10% ~ 45%, be in steady process, system will increase the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
Described echelon selection unit 2 judges that moisture deviation and deviation variation rate are when being less than in 10% scope, are in system stability process, adopts the closed-loop control of moisture list.
Claims (7)
1. a high accuracy tobacco-shred water control method, is characterized in that: comprise the following steps:
Step one, collection pipe tobacco initial water divided data, the data collected are transferred to moisture deviation and deviation variation rate computing unit, the moisture value of described pipe tobacco initial water divided data and process control needs is made difference and is calculated moisture in cut tobacco deviate, deviation variation rate and deviation precision by this moisture deviation and deviation variation rate computing unit;
Step 2, described moisture in cut tobacco deviate and deviation variation rate are transferred to echelon selection unit, this echelon selection unit controls the moisture in cut tobacco in different echelon situation and regulates;
(1) when echelon selection unit judges that moisture deviation and deviation variation rate are when being greater than 90% scope, the proportionality coefficient controlling setting according to moisture provides moisture controlled quentity controlled variable, if moisture regulates the proportionality coefficient not reaching described setting in 200 seconds, then moisture control subsystem proportionality coefficient should be increased and be twice, otherwise, then proportionality coefficient should be reduced one times;
(2) when echelon selection unit judges that moisture deviation and deviation variation rate are between 45% ~ 90%, reduce the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
(3) when echelon selection unit judges that moisture deviation and deviation variation rate are between 10% ~ 45%, increase the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
(4) when echelon selection unit judges that moisture deviation and deviation variation rate are when being less than 10% scope, the closed-loop control of moisture list is adopted;
(5) described echelon selection unit obtains the Parameters variation situation affecting moisture control subsystem stability under different echelon;
Step 3, the deviation precision obtained according to step one, the precision pid control module being added anti-interference momentum control unit by two feedback controls, and revises amount of water.
2., according to high accuracy tobacco-shred water control method according to claim 1, it is characterized in that: also comprise:
Step 4, the Parameters variation situation affecting moisture control subsystem stability obtained according to step 2, the anti-interference pid control module that two feedback adds anti-interference momentum control unit adds disturbance quantity in the output valve of moisture control subsystem, strengthens stability and the precision of moisture control.
3., according to high accuracy tobacco-shred water control method according to claim 1, it is characterized in that: the described parameter affecting moisture control subsystem stability comprise water pressure change, steam pressure change, humidity discharging throttle opening.
4., according to high accuracy tobacco-shred water control method according to claim 1, it is characterized in that: described initial water divided data comprise add water before moisture value, add water after moisture value and add discharge.
5. according to high accuracy tobacco-shred water control method according to claim 1, it is characterized in that: the proportionality coefficient of described setting is 1.5%.
6. a high accuracy moisture in cut tobacco control system, is characterized in that: comprising: moisture deviation and deviation variation rate computing unit, echelon selection unit and two feedback add anti-interference momentum control unit;
The moisture value of the pipe tobacco initial water divided data collected and process control needs is made difference and is calculated moisture in cut tobacco deviate, deviation variation rate and deviation precision by described moisture deviation and deviation variation rate computing unit;
Described echelon selection unit controls according to the moisture in cut tobacco deviate obtained from moisture deviation and deviation variation rate computing unit, deviation variation rate the moisture in cut tobacco in different echelon situation and regulates, and obtains the Parameters variation situation affecting moisture control subsystem stability simultaneously;
Described two feedback adds anti-interference momentum control unit and comprises precision pid control module and anti-interference pid control module;
Precision pid control module obtains the deviation precision come by moisture deviation and the transmission of deviation variation rate computing unit, and then revises amount of water;
Described anti-interference pid control module obtains the Parameters variation situation affecting moisture control subsystem stability from echelon selection unit, and then adds disturbance quantity in the output valve of moisture control subsystem, strengthens stability and the precision of moisture control.
7., according to high accuracy moisture in cut tobacco control system according to claim 6, it is characterized in that:
Described echelon selection unit judges that moisture deviation and deviation variation rate are when being greater than in 90% scope, the proportionality coefficient controlling setting according to moisture provides moisture controlled quentity controlled variable, if moisture regulates the proportionality coefficient not reaching described setting in 200 seconds, then moisture control subsystem proportionality coefficient should be increased and be twice, otherwise, then proportionality coefficient should be reduced one times;
When described echelon selection unit judges that moisture deviation and deviation variation rate are between 45% ~ 90%, reduce the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
When described echelon selection unit judges that moisture deviation and deviation variation rate are between 10% ~ 45%, increase the moisture in cut tobacco controlled quentity controlled variable of 0.5% fast, make moisture control to get back to stable state fast;
Described echelon selection unit judges that moisture deviation and deviation variation rate are when being less than in 10% scope, adopt the closed-loop control of normal moisture list.
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| CN104172457B (en) * | 2014-09-10 | 2016-03-23 | 四川烟草工业有限责任公司 | Tobacco leaf silk drying machine control method |
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| CN105996106B (en) * | 2016-06-17 | 2018-03-27 | 河南中烟工业有限责任公司 | A kind of tobacco quality control method and system based on pneumatic conveying drying |
| CN106262999A (en) * | 2016-08-01 | 2017-01-04 | 河南中烟工业有限责任公司 | A kind of humidifying equipment amount of water automatic correcting method |
| CN108378406B (en) * | 2018-04-11 | 2021-02-19 | 红塔烟草(集团)有限责任公司 | Temperature and humidity control method and system for moisture regain area of tobacco flake redrying machine |
| CN109998141B (en) * | 2019-04-30 | 2022-08-30 | 贵州中烟工业有限责任公司 | Control method for outlet moisture of cut tobacco dryer |
| CN112034791B (en) * | 2020-07-10 | 2021-08-17 | 张家口卷烟厂有限责任公司 | Intelligent control system and method for sheet cut-tobacco drier |
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