CN104517162B - A kind of continuous annealing product hardness Online integration learns forecasting procedure - Google Patents
A kind of continuous annealing product hardness Online integration learns forecasting procedure Download PDFInfo
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Abstract
A kind of continuous annealing product hardness Online integration learns forecasting procedure, belongs to the automatic control technology field of iron and steel enterprise's continuous annealing production process.Using the history continuous annealing creation data sample of enterprise, the integrated study modeling method using LSSVM as sub- learning machine is used, its offline product hardness forecasting model is set up respectively for different temper strips;In actual production, continuous annealing production process data is read in real time, and real-time prediction is carried out to current belt steel product hardness using the offline product hardness forecasting model set up by integrated study;By the inspection of actual production data, the method of the present invention can significantly improve the precision and robustness of continuous annealing product hardness forecast result, site operation personnel is enabled to grasp the quality of current belt steel product in real time, and according to circumstances adjusted in good time, the deficiency of offline inspection large time delay is compensate for, so as to help continuous annealing production line to improve product quality, improve production operation level, increase economic benefit.
Description
Technical field
It is more particularly to a kind of continuous the invention belongs to the automatic control technology field of iron and steel enterprise's continuous annealing production process
Annealing product hardness Online integration learns forecasting procedure.
Background technology
In the actual production process of iron and steel enterprise's cold rolling mill continuous annealing unit, the hardness of strip is to weigh product quality
With the core index of Instructing manufacture.In actual production process, the hardness of strip can not also realize on-line checking, and scene is to pass through
The head of strip, portion after interception annealing, then carry out test experiment analysis to determine the hardness of strip, so as to judge product quality
Situation.But, the quality information of product is obtained by test experiment analysis typically all has regular hour hysteresis quality, also
It is to say only after strip produces a period of time, could obtains its specific quality information, and strip in actual production
Speed of production is very fast, and annealing can be just completed in minutes, so that it is very big often to occur strip hardness fluctuations
Situation, causes to produce that hardness is not up to standard or even the quality problems such as waste product, has a strong impact on the economic benefit of cold rolling mill.
Paper " forecast of continuous annealing unit strip quality and process monitoring system design based on PLS are with realizing [D] " (Wang
Source, Northeastern University, 2009) although being proposed for belt steel product hardness a kind of based on offset minimum binary (Partial Least
Squares, PLS) data driven type modeling method, but the method proposed in this paper can not meet actual production
The need for process, main cause has:(1) information related to strip hardness that the document is considered is less, only 20 or so,
And procedural information related to strip hardness in actual production process then will up to 51;(2) the PLS methods that the document is proposed
Monitoring and fault diagnosis main or for continuous annealing production process, and PLS methods belong to a kind of linear regression method,
And actual production process is then nonlinear, so as to cause the precision of PLS methods not high;(3) there is input item in sample data
It is numerous and intercouple and the problem of output result scope is narrower, cause to exist between sample input item difference it is larger and
Output result is same or like so that traditional Data Modeling Method is difficult to obtain higher precision of prediction and robustness.
The content of the invention
In view of the deficienciess of the prior art, the present invention provides a kind of continuous annealing product hardness Online integration study forecast
Method.
The technical scheme is that:
A kind of continuous annealing product hardness Online integration learns forecasting procedure, comprises the following steps:
Step 1:For each temper strip, the continuous annealing production in the nearest m periods is read from database
Sample, obtains the continuous annealing containing B sample and produces sample set;
Step 2:Continuous annealing for each temper strip produces sample set, carries out data processing;
Each data item in sample set is normalized respectively for step 2.1, to eliminate between different pieces of information
The different influence of dimension;
Step 2.2:The gross error detection method based on cluster is used for the sample set after normalized, is rejected
The sample that A include human error in sample set;
Step 2.2.1:The minimum Eustachian distance d between each sample and other B-1 sample is calculated respectivelyi(i=1,
2,…,B);
Step 2.2.2:Calculate the average value d of the minimum Eustachian distance of all samplesavg, by davgQ times be used as first
Sill;
Step 2.2.3:By the minimum Eustachian distance d in sample set between other B-1 samplesiMore than the first threshold
The sample of value is rejected, while remaining sample is clustered, obtains P cluster;
Step 2.2.4:The minimum Eustachian distance D between each cluster and other P-1 cluster is calculated respectivelyu(u=1,
2,…,P);
Step 2.2.5:Calculate the average value D of the minimum Eustachian distance of all clustersavg, and by DavgR times be used as second
Threshold;
Step 2.2.6:Minimum Eustachian distance between other P-1 are clustered is more than the second threshold value and clustered interior
Sample size be less than t cluster and its comprising sample reject;
Step 3:According to the sample set after step 2 data processing, pivot transition matrix M is asked for and for every kind of temper
Strip sets up its product hardness forecasting model using the integrated study modeling method based on LSSVM and forms offline continuous annealing band
Product made from steel hardness forecasting model storehouse;
Step 3.1:Using PCA methods, all production process datas in the sample set after step 2 data processing are constituted
Matrix carry out dimensionality reduction, keeping characteristics root is more than or equal to 1 pivot, and the pivot of reservation is stored in into pivot transition matrix M;
Step 3.2:According to the sample set after step 2 data processing, using the integrated study modeling side based on LSSVM
Method, its product hardness forecasting model is set up for every kind of temper strip, forms offline continuously annealing steel strip product hardness forecast
Model library;The method for setting up its product hardness forecasting model for every kind of temper strip, comprises the following steps:
Step 3.2.1:Identical weighted value is assigned for all sample standard deviations in the sample set after step 2 data processing, i.e.,
The weight w of each samplei=1/ (B-A);
Step 3.2.2:Based on current sample weights, set up what a belt steel product hardness was forecast using LSSVM methods
Sub- learning machine model, calculates the root-mean-square error of the model and the training error of each sample;
Step 3.2.3:Training error according to each sample adjusts sample weights, and method is:Make training error larger first
Sample weight increase and the less sample of training error weight reduce, new sample weights are obtained, then to new sample
This weight is normalized;
Step 3.2.4:Step 3.2.2 is repeated to step 3.2.3, N number of continuously annealing steel strip product hardness is set up pre-
The sub- learning machine model of report, and it is corresponding each to calculate the root-mean-square error and each sub- learning machine model of each sub- learning machine model
The training error of sample;
Step 3.2.5:According to the root-mean-square error of the step 3.2.4 each sub- learning machine models calculated, each sub- study is calculated
The weight of machine model;
Step 3.2.6:It is one by N number of sub- learning machine model integrated according to N number of sub- learning machine model and its respective weight
Individual integrated study machine model, the integrated study machine model is this kind of temper belt steel product hardness forecasting model, and it is output as
The weighting composite value of the belt steel product hardness predicted value of each sub- learning machine model output;
Step 3.2.7:This kind of temper belt steel product hardness forecasting model is stored in offline continuous annealing band product made from steel hard
Spend forecasting model storehouse;
Step 4:According to the strip temper that continuous annealing is produced is treated, from continuously annealing steel strip product hardness forecasting model storehouse
Middle selection correspondence temper belt steel product hardness forecasting model, starts continuous annealing production;
Step 5:The maximum sampling period T of point is up-sampled with continuous annealing production linemaxZ times be used as belt steel product hardness
In the sampling period of forecasting model, continuous annealing production process data is obtained in real time, it is pre- as this kind of temper belt steel product hardness
The process input vector of model is reported, while being produced to each sampled point on continuous annealing production line when every winding product made from steel head is passed through
Raw associated production status data is recorded;The production process data is each sampled point on continuous annealing production line in every volume
The synthesis of the associated production status data that belt steel product head is produced when passing through and corresponding strip information;The strip packet
Include the specification information and hot rolling information (production information of the strip in hot-rolled process) of its own;
Step 6:Using clustering method to process input vector carry out gross error detection, if the process input to
Amount includes human error, then deletes the process input vector, abandons the belt steel product hardness forecast in this cycle, and waits next
The process input vector in sampling period;Otherwise, then step 7 is entered;
Step 7:Using pivot transition matrix M resulting in step 3, dimensionality reduction is carried out to current process input vector,
Obtain the process input vector represented with pivot;
Step 8:Based on the process input vector after dimensionality reduction, using this kind of temper belt steel product hardness forecasting model to band
Product made from steel hardness is forecast;
Step 9:After the completion of this coiled strip steel continuous annealing production, interception strip leader portion carries out offline inspection, obtains
This coiled strip steel product hardness actual value, and recorded;
Step 10:The corresponding product hardness of the continuous annealing production process data of the every coiled strip steel recorded is actual
Value is matched and synthesized, and forms a new continuous annealing production sample;Each continuous annealing production sample includes H data
;The H data item include several related continuous annealing production status data item, several strips information datas and
Belt steel product hardness actual value;
Step 11:Continuous annealing production sample is updated, method is:For a certain temper strip, when its nearest O time section
After the completion of interior continuous annealing production sample collection, then the continuous annealing production sample in the nearest O time section is added to enterprise
In industry database, while the continuous annealing production sample in the database in earliest O time section is deleted;
Step 12:According to the method for step 1 to step 3, sample is produced according to the continuous annealing after renewal, respectively to each
Temper belt steel product hardness forecasting model carries out re -training and renewal;
Step 13:When new strip continuous annealing produces beginning, step 4 is repeated to step 13, realizes known adjust
The online forecasting of matter degree belt steel product hardness.
Beneficial effects of the present invention:The continuous annealing product hardness Online integration study forecasting procedure of the present invention is used
LSSVM is integrated the result of each sub- learning machine as sub- learning machine maker, and using integrated study framework, as final
Belt steel product hardness predicted value.By the inspection of actual production data, method of the invention can significantly improve continuous annealing
The precision and robustness of product hardness forecast result so that site operation personnel can grasp the matter of current belt steel product in real time
Amount, and according to circumstances adjusted in good time, the deficiency of offline inspection large time delay is compensate for, so as to help continuous annealing production line to carry
High yield quality, improvement production operation level, increase economic benefit.
Brief description of the drawings
Fig. 1 illustrates for the continuous annealing product hardness Online integration study forecasting procedure principle of one embodiment of the present invention
Figure;
Fig. 2 learns forecasting procedure flow chart for the continuous annealing product hardness Online integration of one embodiment of the present invention;
Fig. 3 learns the pre- press of forecasting procedure for the continuous annealing product hardness Online integration of one embodiment of the present invention
Face figure;
Fig. 4 is the continuous annealing product hardness integrated study predicted value and corresponding test sample of one embodiment of the present invention
Comparative result figure;
Fig. 5 monitors surface chart on-line for the continuous annealing product hardness of one embodiment of the present invention;
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
Continuous annealing production is one of important procedure of iron and steel enterprise's cold rolling mill, as shown in figure 1, continuous annealing production line is pressed
It can be divided into following 9 stages according to function:Heating furnace (HF), soaking pit (SF), leer (SCF), 1# black furnaces (1C), 1# are out-of-date
Imitate stove (1OA), 2# overaging stove (2OA), 2# cooling furnaces (2C), water quenching oven (WQ), planisher.In process of production, cold rolling strap
Steel is walked with certain speed in each stove of production line, it is completed the heat such as heating, cooling according to the annealing process route of setting
Handling process process, so as to eliminate internal stress of the strip caused by cold rolling, then after smooth, obtains high-quality strip.
For in actual production process, the hardness of strip can not also realize the present situation of on-line checking, and the present invention provides one
Plant continuous annealing product hardness Online integration study forecasting procedure.The operation principle of this method is as shown in Figure 1:First, enterprise is utilized
The history continuous annealing creation data sample of industry, use with LSSVM (Least Square Support Vector Machine,
Least square method supporting vector machine) as the integrated study modeling method of sub- learning machine, set up respectively for different temper strips
Its offline product hardness forecasting model, and form offline continuously annealing steel strip product hardness forecasting model storehouse;Secondly, in actual life
During production, mould is forecast according to strip temper that continuous annealing is produced is treated from the continuously annealing steel strip product hardness set up offline
Corresponding product hardness forecasting model is selected in type storehouse;Then, from the sampling of continuous annealing production process with being obtained in control system
Each sampled point is produced when every winding product made from steel head is passed through on continuous annealing production line associated production status data is simultaneously carried out
Data prediction and carry out synthesizing and obtaining continuous annealing Real-time Production Process data with strip information;Then, using clustering
Method carries out gross error detection to continuous annealing Real-time Production Process data;It is real for the continuous annealing not comprising human error
When production process data, after PCA (Principle Component Analysis, pivot analysis) method dimension-reduction treatment,
Selected product hardness forecasting model is passed to, so as to export the belt steel product hardness under current working to site operation personnel
Predicted value, and then it is easy to site operation personnel to grasp product quality in time and carried out according to current belt steel product hardness predicted value
Corresponding operating condition adjustment.In addition, can be stored per the production process data at winding steel taping head, when belt steel product hardness
After offline inspection result comes out, after being synthesized with it, new continuous annealing creation data sample is formed, enterprise database is arrived in storage
In.After the completion of the new samples collection of nearest one month, the re -training process of belt steel product hardness forecasting model can be started, from
And the newest operating mode of continuous annealing unit can be tracked by ensureing forecasting model.
Present embodiment is based on the continuous annealing production technology shown in Fig. 1, the belt steel product that production temper is T5, and root
Learn forecasting procedure principle according to continuous annealing product hardness Online integration, continuous annealing product hardness proposed by the invention is existed
Line integrated study method and application is in present embodiment, as shown in Fig. 2 comprising the following steps:
S1:For the strip that temper is T5, the continuous annealing that nearest 3 months are gathered from enterprise database produces sample
This, obtains 350 samples altogether;Wherein each sample is made up of following 52 data item, including 14 strip Information Numbers
According to item, respectively 9 strip steel specification information data items are that inlet thickness, throat width, carbon content, sulfur content, phosphorus content, manganese contain
Amount, nitrogen content, silicone content and total aluminium content, and 5 hot rolling information data items are tapping temperature, Average curl temperature, are averaged
Final rolling temperature, average finishing temperature and continuous acid-washing-rolling elongation percentage (CDCM elongation percentage);37 continuous annealing associated production shapes
State data item, respectively central sections speed, the area's furnace temperature of HF stoves 1, the area's furnace temperature of HF stoves 2, the area's furnace temperature of HF stoves 3, the area's furnace temperature of HF stoves 4, HF
The area's furnace temperature of stove 5, HF outlet of stills belt steel temperature, the area's furnace temperature of SF stoves 1, the area's furnace temperature of SF stoves 2, SF outlet of stills belt steel temperature, the area of SCF stoves 1
Furnace temperature, the area's furnace temperature of SCF stoves 2, SCF outlet of stills belt steel temperature, the area's furnace temperature of 1C stoves 1, the area's furnace temperature of 1C stoves 2, the area's furnace temperature of 1C stoves 3,1C stoves
Cooling gas temperature, 1C outlet of stills belt steel temperature, the area's furnace temperature of 1OA stoves 1, the area's furnace temperature of 1OA stoves 2,1OA outlet of stills belt steel temperature, 2OA
Stove 1-1 areas furnace temperature, 2OA stove 1-2 areas furnace temperature, 2OA stove 2-1 areas furnace temperature, 2OA stove 2-2 areas furnace temperature, 2OA outlet of stills belt steel temperature, 2C
Stove furnace temperature, 2C cooling gas temperature, 2C outlet of stills belt steel temperature, the area's water temperature of WQ stoves 1, the area's water temperature of WQ stoves 2, planisher elongation percentage,
Planisher strip steel at entry tension force, strip tension in the middle of planisher, planisher outlet strip tension, planisher 1# frames roll-force and
2# frame roll-forces;1 belt steel product hardness actual value data item.The continuous annealing production sample set such as institute of table 1 gathered
Show, each of which row represents a sample, it is each to be classified as a data item, and successively according to from strip steel specification information data,
Hot rolling information data, continuous annealing associated production status data to last belt steel product hardness actual value data item it is suitable
Sequence is arranged.With SiRepresent sample, Si=(si1,si2,…,sik,…,si52), wherein i=1,2 ..., 350, sikRepresent i-th
K-th of data item of individual sample.
In table 1. nearest 3 months temper for T5 belt steel product continuous annealing production sample set
S2:Data processing is carried out to the continuous annealing production sample set shown in table 1;
S2.1:Each column data in table 1 is normalized respectively, to eliminate dimension between different pieces of information
Different influences;
S2.2:The gross error detection method based on cluster is used for the sample set after normalized, bag is rejected
Sample containing human error, comprises the following steps:
S2.2.1:Each sample S is calculated respectivelyiWith the minimum Eustachian distance between other 349 samplesWherein i=1,2 ..., 350;
S2.2.2:Calculate the average value of the minimum Eustachian distance of all samplesBy davg3 times,
That is 3davgIt is used as the first threshold value (3davgFor the threshold value obtained by experiment);
S2.2.3:It is d by the minimum Eustachian distance in sample set with other 349 samplesi>3davgSample reject,
By remaining sample, (minimum Eustachian distance with other 349 samples is d simultaneouslyi≤3davgSample) carried out according to nearby principle
Cluster, obtains 36 clusters;
S2.2.4:Each cluster C is calculated respectivelyuMinimum Euclidean between (u=1,2 ..., 36) and other 35 clusters away from
FromWhereinRepresent cluster CuCenter (cu1,…,
cu52) in k-th of data item value, i.e., the arithmetic mean of instantaneous value of k-th of data item in all samples that the cluster is included, wherein |
Cu| represent cluster CuThe quantity of middle sample;
S2.2.5:Calculate the average value D of the minimum Eustachian distance of 36 clustersavg, and by Davg3 times, i.e. 3DavgAs
Second threshold;
S2.2.6:Minimum Eustachian distance between other 35 are clustered is more than the second threshold value and clusters interior sample
Quantity be less than 10 cluster and its comprising sample reject;Wherein 3DavgIt is to be obtained by experiment with the sample size 10 in cluster
Threshold value;
Continuous annealing shown in table 1 produces sample set after S2.1 and S2.2 data processing, has 5 and included
The sample of error difference is removed, as shown in table 2.
5 comprising the human error sample that table 2. is removed
S3:Using PCA methods to preceding 14 strips information data of remaining 345 samples in sample set and 37
The associated production status data item matrix that totally 51 data item are constituted carries out dimensionality reduction, and keeping characteristics root is more than or equal to 1 11 masters
Member, is stored in pivot transition matrix M;Meanwhile, always according to remaining 345 samples in sample set, using the collection based on LSSVM
Into learning model building method, its product hardness forecasting model is set up for this kind of temper strip, and it is quenched by this kind set up
Degree belt steel product hardness forecasting model is stored in offline continuously annealing steel strip product hardness forecasting model storehouse;It is described to be directed to this kind
The method that temper strip sets up its product hardness forecasting model, comprises the following steps:
S3.1:Identical weighted value, i.e., the weight w of each sample are assigned for 345 sample standard deviationsi=1/345, and is set
Habit machine indexes l=1;
S3.2:Based on current sample weights, trained using LSSVM methods and obtain what a belt steel product hardness was forecast
Sub- learning machine model;Method is:Radial basis kernel function is used in LSSVM, i.e.,Wherein xiRepresent
Preceding 51 input datas of i-th of training sample, σ2For kernel functional parameter, specific step is as follows:
S3.2.1:In span, 20 initial LSSVM parameter combinations are randomly generated.Remember that each parameter combination is
Pj=(γj,σ2 j), wherein γjWith σ2 jParameter combination P is represented respectivelyjIn to the penalty coefficient and kernel functional parameter of error.γjWith
σ2 jSpan be respectively [5,50] and [0.1,2.0];
S3.2.2:For each parameter combination Pj=(γj,σ2 j), solve a system of linear equations as follows:
Wherein n=345 is total sample number amount, yi(i=1 ..., 345) represents the output of i-th of sample, i.e. strip hardness.
So as to obtain the model parameter α of the LSSVM corresponding to the parameter combinationi(i=1 ..., 345) and b, further according to each sample data
Preceding 51 input datas use set up LSSVM models to predict its hardness, i.e. Hardness Prediction valueAnd then calculate parameter combination PjEvaluation index, that is, the root-mean-square error predicted the outcome
S3.2.3:Using the minimum LSSVM models of current RMSE value as best LSSVM models, LSSVM is designated asbest。
S3.2.4:Based on 20 current parameter combinations, 20 new parameter combinations are obtained in accordance with the following methods:First,
Randomly choose two parameter combination Pf=(γf,σ2 f) and Pg=(γg,σ2 g);Secondly, a new parameter combination P is producedj=
(γj,σ2 j), γjIn scope [γmin–0.5I1,γmax+0.5I1] in randomly generate, wherein γmin=min { γf,γg, γmax
=max { γf,γg, I1=γmax–γmin;Similarly, σ2 jIn scope [σ2 min–0.5I2,σ2 max+0.5I2] in randomly generate,
Wherein σ2 min=min { σ2 f,σ2 g, σ2 max=max { σ2 f,σ2 g, I2=σ2 max–σ2 min。
S3.2.5:For 20 parameter combinations newly produced, its evaluation index is calculated using the S3.2.2 methods proposed.
Less preceding 20 parameter combinations of evaluation index are taken from current 40 parameter combinations, if having obtained more preferable LSSVM models,
Then update LSSVMbest, delete remaining 20 second-rate parameter combinations.
S3.2.6:S3.2.4 and S3.2.5 are repeated, (repeats to be able to for 500 times in given fortune for 500 times altogether
The preferable LSSVM models of quality are obtained in row time range), by resulting LSSVMbestStore, learned as l-th of son
Habit machine, and calculate the corresponding each sample x of the modeliTraining error
S3.3:According to each sample xiTraining error ζiSample weights are adjusted, method is:First, ε=0 is set, for institute
There is sample, if ζi>0.01, then ε=ε+wi;Secondly, β is setl=ε × ε;Again, if sample xiTraining error ζi>
0.01, then the weight for adjusting the sample is wi=wi×βl, otherwise its weight be adjusted to wi=1;So that training error is larger
Sample weight increase, and the less sample weights of training error diminish;Finally, to all weight wiPlace is normalized
Reason.
S3.4:The method that above-mentioned S3.2 and S3.3 are proposed is reused, son of 5 belt steel product hardness forecast is set up
Habit machine model, the best parameter group and its corresponding β of each sub- learning machine modellValue, average training error are as shown in table 3.
The relevant parameter of the pre- man who brings news of appointment's learning machine model of the belt steel product hardness of table 3.
Numbering l | γ | σ2 | βl | Average relative error (%) | RMSE |
1 | 23.408 | 0.806 | 0.0125 | 0.50059 | 4.12081 |
2 | 20.9353 | 0.845 | 0.778 | 0.539676 | 4.34022 |
3 | 49.6097 | 0.731 | 0.570 | 0.533521 | 4.30655 |
4 | 25.0794 | 0.702 | 0.563 | 0.604213 | 4.95296 |
5 | 21.8188 | 0.712 | 0.181 | 0.480041 | 3.86035 |
S3.5:Based on the 5 sub- learning machine models set up, the strip of integrated study machine model is determined according to equation below
Product hardness predicts the outcome:WhereinIt is to be directed to sample x
Preceding 51 input items, the predicted value calculated by l-th of belt steel product hardness forecasting model.5 sub- learning machine Models Sets
The training result of T5 temper belt steel product hardness forecasting models after is as shown in Figure 3.
In addition to 345 training samples of used nearest 3 months, from enterprise database acquisition time earlier 1
41 belt steel product hardness actual values of individual month as T5 temper belt steel product hardness forecasting models test sample, with examine
The validity of the continuous annealing product hardness forecasting model based on integrated study proposed.It is hard by T5 temper belt steel products
The comparative result of belt steel product Hardness Prediction result and this 41 belt steel product hardness actual values obtained by degree forecasting model is such as
Shown in table 4 and Fig. 4, it can be seen that method proposed by the invention is relative not have in the estimated performance of continuous annealing product hardness
The consensus forecast deviation for having the test sample learnt is 0.585%, and can follow the change of belt steel product actual hardness
Trend, with preferable generalization ability and robustness.
The test sample of table 4. and the contrast that predicts the outcome of the continuous annealing product hardness forecasting model based on integrated study
S3.6:The integrated study model that the temper belt steel product hardness is forecast is stored in offline continuous annealing band product made from steel
Hardness forecasting model storehouse;
S4:When actual continuous annealing produces the strip that temper is T5, mould is forecast from continuously annealing steel strip product hardness
Above-mentioned T5 tempers belt steel product hardness forecasting model is selected in type storehouse, starts continuous annealing production;
S5:The maximum sampling period using continuous annealing production line up-sampling point took its 2 times as T5 temper bands as 1 second
It is the sampling period of product made from steel hardness forecasting model, each with being read in control system from the sampling of continuous annealing production process every 2 seconds
The associated production status data that sampled point is produced when every winding product made from steel head is passed through, and it is synthesized into company with strip information
Continuous annealing production process data, i.e. first 51 of continuous annealing production sample, referred to as process input vector, meanwhile, to continuously moving back
The associated production status data that each sampled point is produced when every winding product made from steel head is passed through on fiery production line is recorded;
S6:Gross error detection is carried out to process input vector using clustering method, method is:Calculating process first
Minimum Euclidean in input vector and current database between first 51 of each continuous annealing production sample of T5 tempers strip
Distance, then minimum Eustachian distance average value is calculated, if the average value is more than the first threshold value calculated in S2.2.2
3davg, then it is assumed that it is normal sample, then enters in next step S7;Otherwise it is assumed that the sample includes human error, delete
The process input vector, abandons the hardness forecast in this cycle, and waits the process input vector in next sampling period;
S7:Using pivot transition matrix M resulting in step 3, dimensionality reduction is carried out to current process input vector, obtained
The process input vector represented with pivot;
S8:Based on the process input vector after dimensionality reduction, correspondence is forecast using T5 temper belt steel product hardness forecasting model
Strip hardness number, and shown by operating platform display device, as shown in figure 5, the interface upper left corner can be shown in real time
Strip hardness predicted value corresponding to current production status, facilitates site operation personnel to be carried out by the predicted value to production process
Monitoring, so as to ensure product quality in acceptability limit.
S9:After the completion of current strip production, interception strip leader portion carries out offline inspection, obtains this winding product made from steel hard
It is 64 to spend actual value, and is recorded;
S10:By the continuous annealing production process data of this coiled strip steel recorded and this coiled strip steel product hardness actual value
64 are matched and are synthesized, and form a new continuous annealing production sample, and recorded;
S11:T5 temper strips continuous annealing production sample is updated, method is:For T5 temper strips, if when it
After the completion of the continuous annealing production sample collection of nearest one month, then the continuous annealing production sample of this month is added first
Into enterprise database, then all continuous annealings production sample standard deviation of that month by the time in the database earliest is deleted
Remove,
S12:According to S2 to S4 method, sample is produced according to the T5 temper strips continuous annealing after renewal, T5 is adjusted
Matter degree belt steel product hardness forecasting model carries out re -training with updating, so that T5 temper belt steel products hardness forecasts mould
Type can follow current continuous annealing actual production operating mode to be adjusted correspondingly.
S13:When new T5 temper strips continuous annealing produces beginning, S4 to S13 is repeated, is realized quenched to T5
Spend the online forecasting of belt steel product hardness.
Present embodiment learns the company that forecast system realizes present embodiment by continuous annealing product hardness Online integration
Continuous annealing product hardness Online integration study forecasting procedure, the system is included with lower module:Database maintenance module, continuous annealing
Production process modeling module, data preprocessing module and product hardness online forecasting module.Database maintenance module is mainly used to
The deletion to enterprise's historical data and the importing of new samples data etc. is completed to operate;Data preprocessing module is mainly used to completion and is directed to
Gross error detection and PCA dimensionality reductions of production process sample etc. are operated.Continuous annealing production process modeling module is to complete base
In LSSVM integrated study modeling function, and show training and the test result of set up belt steel product hardness forecasting model.
Product hardness online forecasting module is mainly used to realize continuously annealing steel strip product hardness online forecasting function.Present embodiment
Continuous annealing product hardness Online integration study forecast system, be and shown in Fig. 1 continuous annealing production process sampling with control
System processed matches what is used, and the sampling of continuous annealing production process and control system place can be attached it to when using at the scene
Computer in, the computer as the inventive method hardware platform.The company that the inventive method will be installed from the computer
Associated production state of the continuous annealing production process sampling with reading each sampled point of continuous annealing production process in control system in real time
Data, after being pre-processed, form continuous annealing production process data, reuse integrated study model to current belt steel product
Hardness carries out real-time prediction, and result is shown on this computer screen, facilitates site operation personnel to grasp band in real time
The quality information of steel, and take in quality fluctuation the regulating measures of correlation.
Claims (5)
1. a kind of continuous annealing product hardness Online integration learns forecasting procedure, it is characterised in that:Comprise the following steps:
Step 1:For each temper strip, the continuous annealing production sample in the nearest m periods is read from database,
Obtain the continuous annealing containing B sample and produce sample set;
Step 2:Continuous annealing for each temper strip produces sample set, carries out data processing;
Step 3:According to the sample set after step 2 data processing, pivot transition matrix M is asked for and for every kind of temper strip
Its product hardness forecasting model is set up using the integrated study modeling method based on LSSVM and offline continuously annealing steel strip production is formed
Product hardness forecasting model storehouse;
Step 4:According to the strip temper that continuous annealing is produced is treated, selected from continuously annealing steel strip product hardness forecasting model storehouse
Correspondence temper belt steel product hardness forecasting model is selected, starts continuous annealing production;
Step 5:The maximum sampling period T of point is up-sampled with continuous annealing production linemaxZ times be used as belt steel product hardness forecast
In the sampling period of model, continuous annealing production process data is obtained in real time, mould is forecast as this kind of temper belt steel product hardness
The process input vector of type, while each sampled point on continuous annealing production line is produced when every winding product made from steel head is passed through
Associated production status data is recorded;The production process data is each sampled point on continuous annealing production line in every coiled strip steel
The synthesis of the associated production status data that product head is produced when passing through and corresponding strip information;The strip information includes it
The specification information and hot rolling information of itself;
Step 6:Gross error detection is carried out to process input vector using clustering method, if the process input vector bag
Containing human error, then the process input vector is deleted, abandon the belt steel product hardness forecast in this cycle, and wait next sampling
The process input vector in cycle;Otherwise, then step 7 is entered;
Step 7:Using pivot transition matrix M resulting in step 3, dimensionality reduction is carried out to current process input vector, obtained
The process input vector represented with pivot;
Step 8:Based on the process input vector after dimensionality reduction, strip is produced using this kind of temper belt steel product hardness forecasting model
Product hardness is forecast;
Step 9:After the completion of this coiled strip steel continuous annealing production, interception strip leader portion carries out offline inspection, obtains this volume
Belt steel product hardness actual value, and recorded;
Step 10:The corresponding product hardness actual value of the continuous annealing production process data of the every coiled strip steel recorded is entered
Row matching and synthesis, form a new continuous annealing production sample;Each continuous annealing production sample includes H data item;
The H data item includes several related continuous annealing production status data item, several strip information datas and band
Product made from steel hardness actual value;
Step 11:Update continuous annealing production sample;
Step 12:According to the method for step 1 to step 3, sample is produced according to the continuous annealing after renewal, respectively to each quenched
Degree belt steel product hardness forecasting model is updated;
Step 13:When new strip continuous annealing produces beginning, step 4 is repeated to step 13, realizes known temper
The online forecasting of belt steel product hardness.
2. continuous annealing product hardness Online integration according to claim 1 learns forecasting procedure, it is characterised in that:It is described
Step 2 in for each temper strip continuous annealing production sample set carry out data processing, comprise the following steps:
Step 2.1:Each data item in sample set is normalized respectively, to eliminate dimension between different pieces of information
Different influences;
Step 2.2:The gross error detection method based on cluster, Rejection of samples are used for the sample set after normalized
The sample that A include human error in set;
Step 2.2.1:The minimum Eustachian distance d between each sample and other B-1 sample is calculated respectivelyi(i=1,2 ...,
B);
Step 2.2.2:Calculate the average value d of the minimum Eustachian distance of all samplesavg, by davgQ times be used as the first threshold;
Step 2.2.3:By the minimum Eustachian distance d in sample set between other B-1 samplesiMore than the first threshold value
Sample is rejected, while remaining sample is clustered, obtains P cluster;
Step 2.2.4:The minimum Eustachian distance D between each cluster and other P-1 cluster is calculated respectivelyu(u=1,2 ...,
P);
Step 2.2.5:Calculate the average value D of the minimum Eustachian distance of all clustersavg, and by DavgR times be used as the second threshold;
Step 2.2.6:Minimum Eustachian distance between other P-1 are clustered is more than the second threshold value and clusters interior sample
Quantity be less than t cluster and its comprising sample reject.
3. continuous annealing product hardness Online integration according to claim 1 learns forecasting procedure, it is characterised in that:It is described
Step 3 in pivot transition matrix M is asked for according to the sample set after step 2 data processing method be:Using PCA methods,
Dimensionality reduction is carried out to the matrix that all production process datas are constituted in the sample set after step 2 data processing, keeping characteristics root is big
Pivot transition matrix M is stored in the pivot equal to 1, and by the pivot of reservation.
4. continuous annealing product hardness Online integration according to claim 2 learns forecasting procedure, it is characterised in that:It is described
Step 3 according to the sample set after step 2 data processing for every kind of temper strip use integrated based on LSSVM
The method that modeling method sets up its product hardness forecasting model is practised, is comprised the following steps:
Step 3.2.1:Assign identical weighted value for all sample standard deviations in the sample set after step 2 data processing, i.e., it is each
The weight w of samplei=1/ (B-A);
Step 3.2.2:Based on current sample weights, son that a belt steel product hardness is forecast is set up using LSSVM methods
Habit machine model, calculates the root-mean-square error of the model and the training error of each sample;
Step 3.2.3:Training error according to each sample adjusts sample weights, and method is:The sample for making training error larger first
This weight increase and the weight of the less sample of training error reduce, and obtain new sample weights, then new sample is weighed
It is normalized again;
Step 3.2.4:Step 3.2.2 to step 3.2.3 is repeated, N number of continuously annealing steel strip product hardness forecast is set up
Sub- learning machine model, and calculate the root-mean-square error and the corresponding each sample of each sub- learning machine model of each sub- learning machine model
Training error;
Step 3.2.5:According to the root-mean-square error of the step 3.2.4 each sub- learning machine models calculated, each sub- learning machine mould is calculated
The weight of type;
Step 3.2.6:It is a collection by N number of sub- learning machine model integrated according to N number of sub- learning machine model and its respective weight
Into learning machine model, the integrated study machine model is this kind of temper belt steel product hardness forecasting model, and it is output as each son
The weighting composite value of the belt steel product hardness predicted value of learning machine model output;
Step 3.2.7:This kind of temper belt steel product hardness forecasting model is stored in offline continuously annealing steel strip product hardness pre-
Report model library.
5. continuous annealing product hardness Online integration according to claim 1 learns forecasting procedure, it is characterised in that:It is described
Step 11 in update continuous annealing production sample method be:For a certain temper strip, when in its nearest O time section
After the completion of continuous annealing production sample collection, then the continuous annealing production sample in the nearest O time section is added to enterprise's number
According in storehouse, while the continuous annealing production sample in the database in earliest O time section is deleted.
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