CN114653761A - Roll inclination output control method based on plate shape closed loop regulating quantity - Google Patents
Roll inclination output control method based on plate shape closed loop regulating quantity Download PDFInfo
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- CN114653761A CN114653761A CN202210559410.4A CN202210559410A CN114653761A CN 114653761 A CN114653761 A CN 114653761A CN 202210559410 A CN202210559410 A CN 202210559410A CN 114653761 A CN114653761 A CN 114653761A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a roll inclination output control method based on a strip shape closed loop regulating quantity, which is used for establishing a continuous equation and a discrete calculation expression of a control model of a roll inclination closed loop feedback PI controller according to a setting principle of the PI controller. The method is characterized in that the setting mode of the control quantity of the roll inclination closed-loop feedback control during the specification change of the strip steel is established by utilizing the process characteristics of the cold-rolled strip steel production and the control characteristics of the plate shape closed-loop feedback control system, so that the zero clearing function is realized when the width or the thickness of the strip steel is changed by the control quantity of the roll inclination closed-loop feedback control. And establishing a control quantity maintaining function of closed loop feedback control of roll inclination during shearing by using a welding seam four-frame signal and a wrapper belt signal.
Description
Technical Field
The invention belongs to the technical field of cold-rolled strip steel plate shape control, and relates to a roller inclination output control method based on plate shape closed-loop regulating quantity.
Background
Roll inclination is an important strip shape regulating mechanism. In the L1 control system in the field of cold continuous rolling, a calculation method based on an error between a set value and an actual value has been developed for roll inclination, and the roll inclination control capability can be effectively improved. At present, a great deal of research is carried out on the control mode of roll inclination, the acquisition of preset values and closed-loop feedback control. However, there is little research on the data transmission mode and the transmission sequence of the actuator, and if the data transmission sequence is not properly set, the execution position of the roller inclination actuator is suddenly changed in a short time, and further, the quality of the related product is caused. The part of the content needs to be combined with a hydraulic roll gap control system, and the transmission sequence and the process flow of the actual value of the inclination of the roll, the preset value of the inclination of the roll and the closed loop feedback adjustment value of the inclination of the roll are optimized and modified on the basis of mastering the control principle and the calculation mode of the hydraulic roll gap control system.
At present, most scholars correct the rolling result, and both a forecasting model and a mechanism analysis model reversely set rolling process data capable of realizing the result from the perspective of the rolling result, but the problems of data fluctuation phenomenon, data transmission strategy and the like of roll inclination in the control process are still rarely researched.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a roll inclination output control method based on a plate shape closed loop regulating quantity, which avoids the obvious fluctuation of the roll inclination actual value caused by the changes of a roll inclination preset value, a roll inclination manual regulating quantity and a control quantity of roll inclination closed loop feedback control.
The invention discloses a roll inclination output control method based on plate shape closed loop adjustment quantity, which comprises the following steps of:
step 1: setting a continuous equation of a control model of a roller inclination closed-loop feedback PI controller in a plate shape closed-loop feedback control system according to a set principle and rule of the PI controller and by combining production process data;
step 2: discrete transformation is carried out on a continuous equation of a control model of the roll inclination closed-loop feedback PI controller, and the control quantity of roll inclination closed-loop feedback control in the strip shape closed-loop feedback control system is established
The calculation equation of (2) is set up as the calculation mode of the integral coefficient of the roll inclination closed-loop feedback PI controller, and
carrying out amplitude limiting processing;
and step 3: according to the control principle of cold continuous rolling plate shape and in step 2
The calculation results of (2) are established in both the case of a specification change and the case of manually adjusting the roll inclination
The zero clearing process of (2);
and 4, step 4: control variable based on roll inclination closed-loop feedback control
Combined rollingAmount of manual adjustment of roll inclination
Roll inclination preset value
Establishing actual values of roll inclination for both conditions in step 3
The form of calculation of (a);
and 5: according to step 3
In the setting form and step 4
Is established in the strip steel shearing and rolling stage
And (4) a retention function after zero clearing.
In the method for controlling roll inclination output based on plate shape closed loop adjustment of the present invention, the step 1 specifically comprises:
setting the adjustment quantity of closed-loop feedback control of roll inclination as
The plate shape deviation value of the closed loop feedback control of the inclination of the roller is
The proportional coefficient of the roller inclination closed loop feedback PI controller is
The integral coefficient of the roller inclination closed loop feedback PI controller is
Control of closed-loop feedback PI controllers for roll inclinationThe continuous equation for modeling is:
wherein, the first and the second end of the pipe are connected with each other,
for the compensation coefficient of roll tilt, s is the differential operator, s = d/dt.
In the method for controlling roll inclination output based on strip shape closed loop adjustment of the present invention, the step 2 specifically comprises:
step 2.1: according to the solution mode of the discrete equation of the PI controller,
converting continuous equation of control model of roller inclination closed-loop feedback PI controller into control quantity of roller inclination closed-loop feedback control for executing mechanism
：
Wherein the content of the first and second substances,
a data scanning period for a plate-shaped closed-loop feedback control system;
strip shape deviation value for closed loop feedback control of roll inclination
A discrete form of (a);
step 2.2: integral coefficient of closed loop feedback PI controller for setting roll inclination
The calculation method of (A) is as follows:
wherein the content of the first and second substances,
the process coefficient for roll tilt;
the rolling speed is the rolling speed in the steady state stage and is in the unit of m/min;
step 2.3: to pair
Carrying out amplitude limiting processing, wherein the expression is as follows:
in the method for controlling roll inclination output based on strip shape closed loop adjustment of the present invention, the step 3 specifically comprises:
step 3.1: in order to prevent the occurrence of abnormality in the quality of the strip shape when the specification is changed, the target width of the strip or the target thickness of the strip is set so that
Is zero, i.e.
The zero clearing process of (2); when both the target width of the strip and the target thickness of the strip are constant,
then the current calculated value is restored;
step 3.2: to prevent the effect of manually adjusting roll tilt on closed-loop control of the plate profile, the manual roll tilt adjustment knob signals PB1 and PB2 are used to control roll tilt
Carrying out zero clearing setting; PB1 is a roll inclination manual plus signal, and PB2 is a roll inclination manual minus signal; when the PB1 or PB2 signals toggle,
are all set to 0; when the PB1 or PB2 signal is turned off
Is not cleared.
In the method for controlling roll inclination output based on strip shape closed loop adjustment of the present invention, the step 4 specifically comprises:
step 4.1: the specification change in the step 3 and the manual adjustment of the inclination of the roller are carried out
Set to 0, so in both cases the actual value of roll inclination
The calculation form of (1) is the same, and only the setting conditions are different; actual value of roll inclination
The expression of (a) is:
wherein the content of the first and second substances,
the amount of manual adjustment for the roll inclination,
presetting a value for inclination of the roller; roll inclination preset value
The method is obtained by basic automatic control calculation in a plate shape closed loop feedback control system; manual adjustment of roll inclination
And actual value of roll inclination
All the data are obtained by automatic process control acquisition in a plate-shaped closed loop feedback control system;
step 4.2: before specification change or before triggering of a manual roll inclination adjusting button signal, the actual roll inclination value of the last calculation period is
The expression is:
wherein the content of the first and second substances,
finally, calculating the manual adjustment quantity of the inclination of the roller in the period;
calculating the control quantity of closed loop feedback control of roll inclination in the last period;
a roll inclination preset value for the last calculation cycle;
step 4.3: at the moment of specification change or the moment of triggering of a manual adjustment button signal of the roll inclination, the actual value of the roll inclination in the instantaneous calculation period is
The expression is:
wherein the content of the first and second substances,
calculating the roll inclination manual adjustment amount of the period instantaneously;
calculating the control quantity of the roll inclination closed loop feedback control of the period for the moment;
calculating a roll inclination preset value of a period for the instant;
step 4.4: when the specification is changed or the roll inclination is manually adjusted, the device is used for controlling the roll inclination
And
then, at this time,
(ii) a I.e. the actual value of roll inclination is not due to
Resulting in severe numerical fluctuations.
In the method for controlling roll inclination output based on strip shape closed loop adjustment of the present invention, the step 5 specifically comprises:
when the welding seam passing through the four-stand signal is detected, if the specification of the strip steel is changed or the inclination of the roller is manually adjusted, the welding seam passing through the four-stand signal is detected
Zero clearing and keeping zero; when detecting that the welding seam passes through the four-frame signal, if the specification of the strip steel is not changed and the inclination of the roller is not manually adjusted, then
Keep movingState calculation; when the wrapper belt open signal is detected,
and continuing to perform dynamic calculation.
The invention discloses a roll inclination output control method based on plate shape closed loop regulating quantity, which at least has the following beneficial effects:
1. the setting mode of the control quantity of the roll inclination closed-loop feedback control during the strip steel specification change is changed, the zero clearing function of the control quantity of the roll inclination closed-loop feedback control during the strip steel target width or thickness change is realized, and the strip steel quality in the shearing stage is improved.
2. The maintaining function of the control quantity of the roll inclination closed-loop feedback control in the shearing stage is added, and the stability of the control quantity of the roll inclination closed-loop feedback control in the shearing stage is improved;
3. the system function in the cold rolling unit is fully utilized, and the accurate control of the zero clearing function and the maintaining function is realized by utilizing a welding seam four-frame signal and an auxiliary winding belt opening signal.
Drawings
FIG. 1 is a flow chart of a method of roll inclination output control based on strip shape closed loop adjustment of the present invention;
FIG. 2 is a diagram showing the calculation results of the control amount of the closed-loop feedback control of roll inclination;
FIG. 3 is a flowchart of output setting of a controlled variable of closed loop feedback control of roll inclination at the time of specification change or at the time of manual adjustment of roll inclination;
FIG. 4 is a diagram showing the calculation results of the control amount of closed-loop feedback control of roll inclination when the roll inclination is manually adjusted or when the specification is changed;
FIG. 5 is a data comparison graph of the control quantity of the closed loop feedback control of roll inclination with the actual value of roll inclination when the roll inclination is manually adjusted;
FIG. 6 is a graph comparing the control amount of closed loop feedback control of roll inclination with the actual value of roll inclination at the time of specification change;
fig. 7 is a data diagram illustrating the retention function after the control amount of the roll inclination closed-loop feedback control is cleared in the shear rolling stage.
Detailed Description
The invention develops a roll inclination output control method based on plate shape closed loop adjustment quantity. The actual value of the roll inclination is set by three subsections of a roll inclination preset value, a roll inclination manual regulating quantity and a control quantity of closed loop feedback control of the roll inclination according to the program setting logic. When some sub-part of the roll changes, it will inevitably lead to large fluctuations in the actual value of roll inclination. When the amount of variation is small, an abnormal plate-shaped feature is not caused. If the variation is large, the product quality defect is easily caused. Therefore, when the preset value of the roll inclination, the manual adjustment amount of the roll inclination and the control amount of the closed-loop feedback control of the roll inclination are changed greatly, the actual value of the roll inclination does not change suddenly obviously, but the next value is excessively required in a gradual mode. The method establishes an output control method of the actual inclination value of the roller according to a control model of a roller inclination closed-loop feedback PI controller, a hydraulic roller gap control setting flow, signals of an opening and closing switch of an auxiliary winding belt, signals of an opening and closing switch of a welding seam passing through four frames and signals of an opening and closing switch with changed specifications, and applies the output control method to the setting of the inclination value of the roller, thereby avoiding the obvious fluctuation of the actual inclination value of the roller caused by the changes of a preset inclination value of the roller, manual adjustment quantity of the inclination of the roller and control quantity of the roller inclination closed-loop feedback control.
Firstly, establishing a continuous equation of a control model of a roller inclination closed-loop feedback PI controller according to a setting principle of the PI controller, and forming a discretization calculation form; secondly, aiming at influencing factors influencing the inclination of the roller, a zero clearing process of the control quantity of closed-loop feedback control of the inclination of the roller during manual adjustment of the inclination of the roller and a zero clearing process of the control quantity of closed-loop feedback control of the inclination of the roller during specification change are established so as to improve the precision of closed-loop adjustment of the inclination shape of the roller; then, aiming at the zero clearing process of the control quantity of the closed loop feedback control of the roll inclination, the possible influence on the actual value of the roll inclination is established in the output form of the actual value of the roll inclination during the manual roll inclination and the specification change; and finally, aiming at the production characteristics in the shearing and rolling stage, establishing a holding function after the control quantity of the roll inclination closed loop feedback control is cleared in the strip steel shearing and rolling stage. The improvement can improve the running continuity of the high-cold continuous rolling strip steel production unit, and further improve the product quality of the cold continuous rolling strip steel.
As shown in FIG. 1, the roll inclination output control method based on the plate shape closed-loop adjustment quantity of the invention comprises the following steps:
step 1: according to the setting principle and the rule of the PI controller and the combination of production process data, a continuous equation of a control model of a roller inclination closed-loop feedback PI controller in a plate shape closed-loop feedback control system is set, and the method specifically comprises the following steps:
setting the regulating quantity of closed-loop feedback control of roll inclination as
The plate shape deviation value of the closed loop feedback control of the inclination of the roller is
The proportional coefficient of the roller inclination closed loop feedback PI controller is
The integral coefficient of the roller inclination closed loop feedback PI controller is
And then the continuous equation of the control model of the roller inclination closed-loop feedback PI controller is as follows:
wherein, the first and the second end of the pipe are connected with each other,
for the compensation coefficient of roll tilt, s is the differential operator, s = d/dt.
Step 2: running the continuous equation of the control model of the roll inclination closed-loop feedback PI controllerDiscrete transformation, and establishing the control quantity of roll inclination closed-loop feedback control in a plate-shaped closed-loop feedback control system
The calculation equation of (2) is set up as the calculation mode of the integral coefficient of the roll inclination closed-loop feedback PI controller, and
performing amplitude limiting processing, specifically:
step 2.1: according to the solution mode of the discrete equation of the PI controller, the continuous equation of the control model of the roller inclination closed-loop feedback PI controller is converted into the control quantity of the roller inclination closed-loop feedback control for the actuating mechanism
The expression is:
wherein the content of the first and second substances,
a data scanning period for a plate-shaped closed-loop feedback control system;
shape deviation value for closed-loop feedback control of roll inclination
A discrete form of (a);iis an index variable.
Step 2.2: integral coefficient of closed loop feedback PI controller for setting roll inclination
The calculation method is as follows:
wherein, the first and the second end of the pipe are connected with each other,
the process coefficient for roll tilt;
the rolling speed is the rolling speed in the steady state stage and is in the unit of m/min;
step 2.3: to pair
Carrying out amplitude limiting processing, wherein the expression is as follows:
in this example, a steel strip having a width of 880mm and a thickness of 0.18mm is taken as an example, and the rolling speed in the steady state stage is
From the process data:
、
calculated according to equation (3)
. FIG. 2 at a certain stage of the interception
The calculated value of (a).
And step 3: according to the cold continuous rolling plate shape control principle and in the step 2
The calculation results of (2) are established in both the case of a specification change and the case of manually adjusting the roll inclination
The specific setting flow of the zero clearing process of (2) is shown in fig. 3.
The specification change means that the specification of the strip is considered to be changed when the target width of the strip or the target thickness of the strip is changed. The target width and the target thickness of the strip steel belong to basic technological parameters of the cold-rolled strip steel and are obtained by rolling procedures.
Step 3.1: in order to prevent the occurrence of abnormality in the quality of the strip shape when the specification is changed, the target width of the strip or the target thickness of the strip is set so that
Is zero, i.e.
The zero clearing process of (2); when the target width of the strip steel and the target thickness of the strip steel are not changed,
the current calculated value is restored.
Step 3.2: to prevent the effect of manually adjusting roll tilt on closed-loop control of the plate profile, the manual roll tilt adjustment knob signals PB1 and PB2 are used to control roll tilt
Carrying out zero clearing setting; PB1 is a roll inclination manual adding signal, and PB2 is a roll inclination manual subtracting signal; when the PB1 or PB2 signals toggle,
are all set to 0; when the PB1 or PB2 signal is turned off, then
Is not cleared.
In this example, FIG. 4 shows the PB1 or PB2 signals being turned on or undergoing a specification change
The data map of the calculation result of (1). As can be seen from the figure, when the PB1 or PB2 signal is on or the specification changes,
is cleared and ramped.
And 4, step 4: control variable based on roll inclination closed-loop feedback control
Combined with manual adjustment of roll inclination
Roll inclination preset value
Establishing actual values of roll inclination for both conditions in step 3
The form of calculation of (1).
Step 4.1: the specification change in the step 3 and the manual adjustment of the inclination of the roller are both performed
Set to 0, so in both cases the actual value of roll inclination
The calculation form of (a) is the same, and only the setting conditions are different. When in step 2
Set to 0, if not inclined to the actual value of the roll
Make corresponding adjustment to make
Producing severe fluctuations.
Actual value of roll inclination
The expression of (a) is:
wherein the content of the first and second substances,
the amount of manual adjustment for the roll inclination,
presetting a value for inclination of the roller; roll inclination preset value
The method is obtained by basic automatic control calculation in a plate shape closed loop feedback control system; manual adjustment of roll inclination
And actual value of roll inclination
The device is obtained by automatically controlling and collecting processes in a plate-shaped closed-loop feedback control system.
Step 4.2: before specification change or before triggering of a manual roll inclination adjusting button signal, the actual roll inclination value of the last calculation period is
The expression is:
wherein the content of the first and second substances,
finally, calculating the manual adjustment quantity of the inclination of the roller in the period;
calculating the control quantity of closed loop feedback control of roll inclination in the last period;
a roll inclination preset value for the last calculation cycle;
step 4.3: the actual value of the roll inclination in the instantaneous calculation period is set at the moment of the specification change or the moment of triggering of a manual adjustment button signal of the roll inclination
The expression is:
wherein, the first and the second end of the pipe are connected with each other,
calculating the roll inclination manual adjustment amount of the period instantaneously;
calculating the control quantity of the roll inclination closed loop feedback control of the period for the moment;
calculating a roll inclination preset value of a period for the instant;
step 4.4: when the specification is changed or the roll inclination is manually adjusted, the device is used for controlling the roll inclination
And
then, at this time,
(ii) a I.e. no cause for the actual value of roll inclination
Resulting in severe numerical fluctuations.
In this example, FIG. 5 is directed to step 3 when roll inclination is manually adjusted
And
FIG. 6 is a graph for comparison of data in step 3 when the specification is changed
And with
Data of (2) versus graphs. As can be seen from fig. 5, when
When the temperature of the water is higher than the set temperature,
without large fluctuation, only the manual adjustment amount of the inclination of the roller is increased
. As can be seen from FIG. 6, when the steel strip is changed from a width of 880mm and a thickness of 0.18mm to a width of 892mm and a thickness of 0.23mm, although
But, however, do
Without large fluctuations, in the form of a ramp for transition to a new strip specification
The value is obtained.
And 5: according to step 3
In the setting form of (1) and in step 4
Is established in the strip steel shearing and rolling stage
And (4) keeping the function after zero clearing.
Since the shear rolling stage belongs to an unsteady state production process,
the calculation result of (2) does not accurately reflect the quality of the strip steel, and in this case, if the specification of the strip steel is changed or the inclination of the roller is manually adjusted, the result will be that
The calculation result of the method deviates from the real production state; therefore, when the strip steel rolling production enters a shearing operation stage, the control quantity of the closed loop feedback control of the inclination of the roller
The periodic operation is not performed any more, and the value is maintained at a certain value.
In the continuous production process of strip steel, a welding seam is a key mark for strip steel bundling. The welding seam passes through the four-frame signal to represent that the current production of the coiled steel enters the tail sound; when the wrapper belt opening signal is detected, the production of the next coil of strip steel is formally started. Therefore, the control quantity of roll inclination closed loop feedback control is established in the strip steel shearing stage by utilizing the process characterization characteristics of the welding seam passing through the four-frame signal and the wrapper belt opening signal
And (4) keeping the function after zero clearing.
The setting mode is as follows: when the welding seam is detected to pass through the four-stand signal, if the specification of the strip steel is changed or the inclination of the roller is manually adjusted, the welding seam is detected to pass through the four-stand signal
After zero clearing, keeping the zero value; if the welding seam is detected to pass through the four-frame signal, if the specification of the strip steel is not changed and the inclination of the roller is not manually adjusted at the same time, the welding seam is detected to pass through the four-frame signal
Keeping dynamic calculation; when the wrapper belt open signal is detected,
and continuing to perform dynamic calculation.
In this example, after extracting part of the feature points, FIG. 7 shows the feature points optimized in step 5
A data image. The two vertical line regions in fig. 7 are the shear rolling stages. It can be seen that, in the shear rolling stage,
maintained at a value of zero.
The above description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (6)
1. A roll inclination output control method based on plate shape closed loop adjustment quantity is characterized by comprising the following steps:
step 1: setting a continuous equation of a control model of a roller inclination closed-loop feedback PI controller in a plate shape closed-loop feedback control system according to a set principle and rule of the PI controller and by combining production process data;
step 2: discrete transformation is carried out on a continuous equation of a control model of the roll inclination closed-loop feedback PI controller, and the control quantity of roll inclination closed-loop feedback control in the strip shape closed-loop feedback control system is established
The calculation equation of (2) is set up as the calculation mode of the integral coefficient of the roll inclination closed-loop feedback PI controller, and
carrying out amplitude limiting processing;
and step 3: according to the control principle of cold continuous rolling plate shape and in step 2
The calculation results of (2) are established in both the case of a specification change and the case of manually adjusting the roll inclination
The zero clearing process of (2);
and 4, step 4: control variable based on roll inclination closed-loop feedback control
Combined with manual adjustment of roll inclination
Roll inclination preset value
Establishing actual values of roll inclination for both conditions in step 3
The form of calculation of (a);
and 5: according to step 3
In the setting form and step 4
Is established in the strip steel shearing and rolling stage
And (4) a retention function after zero clearing.
2. The method for controlling the inclination output of the roll based on the closed-loop adjustment quantity of the plate shape according to claim 1, wherein the step 1 is specifically as follows:
setting the regulating quantity of closed-loop feedback control of roll inclination as
The plate shape deviation value of the closed loop feedback control of the inclination of the roller is
The proportional coefficient of the roller inclination closed loop feedback PI controller is
The integral coefficient of the roller inclination closed loop feedback PI controller is
And then the continuous equation of the control model of the roller inclination closed-loop feedback PI controller is as follows:
wherein the content of the first and second substances,
for roll inclination, s isDifferential operator, s = d/dt.
3. The method for roll tilt output control based on strip shape closed loop adjustment according to claim 2, wherein the step 2 is specifically:
step 2.1: according to the solution mode of the discrete equation of the PI controller, the continuous equation of the control model of the roller inclination closed-loop feedback PI controller is converted into the control quantity of the roller inclination closed-loop feedback control for the actuating mechanism
：
Wherein the content of the first and second substances,
a data scanning period for a plate-shaped closed-loop feedback control system;
strip shape deviation value for closed loop feedback control of roll inclination
A discrete form of (a);
step 2.2: integral coefficient of closed loop feedback PI controller for setting roll inclination
The calculation method is as follows:
wherein, the first and the second end of the pipe are connected with each other,
the process coefficient for roll tilt;
the rolling speed is the rolling speed in the steady state stage and is in the unit of m/min;
step 2.3: to pair
Carrying out amplitude limiting processing, wherein the expression is as follows:
4. the method for roll tilt output control based on strip shape closed loop adjustment according to claim 1, wherein the step 3 is specifically:
step 3.1: in order to prevent the occurrence of abnormality in the quality of the strip shape when the specification is changed, the target width of the strip or the target thickness of the strip is set so that
Is zero, i.e.
The zero clearing process of (2); when the target width of the strip steel and the target thickness of the strip steel are not changed,
then the current calculated value is restored;
step 3.2: to prevent the effect of manually adjusting roll tilt on closed-loop control of the plate profile, the manual roll tilt adjustment knob signals PB1 and PB2 are used to control roll tilt
Carrying out zero clearing setting; PB1 rollThe inclination manual addition signal is PB2, and the inclination manual subtraction signal is a roller inclination manual subtraction signal; when the PB1 or PB2 signals toggle,
are all set to 0; when the PB1 or PB2 signal is turned off
Is not cleared.
5. The method for roll tilt output control based on strip shape closed loop adjustment according to claim 2, wherein the step 4 is specifically:
step 4.1: the specification change in the step 3 and the manual adjustment of the inclination of the roller are carried out
Set to 0, so in both cases the actual value of roll inclination
The calculation form of (2) is the same, and only the setting conditions are different; actual value of roll inclination
The expression of (a) is:
wherein the content of the first and second substances,
the amount of manual adjustment for the roll inclination,
presetting a value for inclination of the roller; roll inclination preset value
The method is obtained by basic automatic control calculation in a plate-shaped closed-loop feedback control system; manual adjustment of roll inclination
And actual value of roll inclination
All the parameters are obtained by automatic process control acquisition in a plate-shaped closed-loop feedback control system;
step 4.2: before specification change or before triggering of a manual roll inclination adjusting button signal, the actual roll inclination value of the last calculation period is
The expression is:
wherein the content of the first and second substances,
finally, calculating the manual adjustment quantity of the inclination of the roller in the period;
calculating the control quantity of the roll inclination closed loop feedback control of the period finally;
a roll inclination preset value for the last calculation cycle;
step 4.3: the actual value of the roll inclination in the instantaneous calculation period is set at the moment of the specification change or the moment of triggering of a manual adjustment button signal of the roll inclination
The expression is:
wherein the content of the first and second substances,
calculating the roll inclination manual adjustment amount of the period instantaneously;
calculating the control quantity of the roll inclination closed loop feedback control of the period for the moment;
calculating a roll inclination preset value of a period instantaneously;
step 4.4: when the specification is changed or the roll inclination is manually adjusted, the device is used for controlling the roll inclination
And
then, at this time,
(ii) a I.e. the actual value of roll inclination is not due to
Resulting in severe numerical fluctuations.
6. The method for controlling the inclination output of the roll based on the closed loop adjustment quantity of the plate shape according to claim 2, wherein the step 5 is specifically as follows:
when a weld passing the four stand signal is detected, e.g.If the specification of the strip steel is changed or the roll inclination is manually adjusted, then
After zero clearing, keeping the zero value; when detecting that the welding seam passes through the four-frame signal, if the specification of the strip steel is not changed and the inclination of the roller is not manually adjusted, then
Keeping dynamic calculation; when the wrapper belt open signal is detected,
and continuing to perform dynamic calculation.
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| CN202210559410.4A CN114653761B (en) | 2022-05-23 | 2022-05-23 | Roll inclination output control method based on plate shape closed loop adjustment quantity |
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| CN202210559410.4A CN114653761B (en) | 2022-05-23 | 2022-05-23 | Roll inclination output control method based on plate shape closed loop adjustment quantity |
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| CN202210559410.4A Active CN114653761B (en) | 2022-05-23 | 2022-05-23 | Roll inclination output control method based on plate shape closed loop adjustment quantity |
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| CN116637942A (en) * | 2023-07-24 | 2023-08-25 | 东北大学 | Rolling parameter coupling-based roll inclination closed-loop control method |
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