CN115712247A - Control method and control device for sand making system, processor and sand making system - Google Patents
Control method and control device for sand making system, processor and sand making system Download PDFInfo
- Publication number
- CN115712247A CN115712247A CN202211497010.1A CN202211497010A CN115712247A CN 115712247 A CN115712247 A CN 115712247A CN 202211497010 A CN202211497010 A CN 202211497010A CN 115712247 A CN115712247 A CN 115712247A
- Authority
- CN
- China
- Prior art keywords
- sand making
- frequency
- feeding
- power
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The embodiment of the invention provides a control method and a control device for a sand making system, a processor and the sand making system, and belongs to the technical field of machine-made sand. The sand making system comprises a sand making machine, a feeder and a frequency converter, and the control method for the sand making system comprises the following steps: acquiring target sand making power of a sand making machine; determining a target feeding frequency corresponding to the target sand making power according to the target sand making power based on the relation between the predetermined feeding frequency and the sand making power; and controlling the frequency converter to work according to the target feeding frequency so as to control the feeding speed of the feeding machine through the frequency converter. The embodiment of the invention can reduce the probability of the false adjustment of the sand making system.
Description
Technical Field
The invention relates to the technical field of machine-made sand, in particular to a control method and a control device for a sand making system, a processor and the sand making system.
Background
At present, a sand making system usually comprises a sand making machine and a feeding machine, and in the production process of the sand making machine, the sand making machine is usually required to be ensured to work within a rated current range and to be in a high-efficiency production state to the maximum extent, and the most direct way for achieving the purpose is to control the feeding quantity, and the feeding quantity is closely related to the feeding speed of the feeding machine. In the prior art, the current of a sand making machine is generally used as a controlled parameter, and the feeding speed of a feeding machine is controlled according to a target current value and a measured current value by acquiring the measured current value of the sand making machine in real time. However, the control method has the problem that the sand making system is easy to be adjusted by mistake.
Disclosure of Invention
The embodiment of the invention aims to provide a control method and a control device for a sand making system, a processor and the sand making system, so as to solve the problem that the sand making system is easy to perform error adjustment in the prior art.
In order to achieve the above object, a first aspect of an embodiment of the present invention provides a control method for a sand making system, where the sand making system includes a sand making machine, a feeder, and a frequency converter, and the control method includes:
acquiring target sand making power of a sand making machine;
determining a target feeding frequency corresponding to the target sand making power according to the target sand making power based on the relation between the predetermined feeding frequency and the sand making power;
and controlling the frequency converter to work according to the target feeding frequency so as to control the feeding speed of the feeding machine through the frequency converter.
In the embodiment of the invention, the determination process of the relation between the feeding frequency and the sand making power comprises the following steps: acquiring historical sand making power data and historical feeding frequency data of a sand making system; and determining the relation between the feeding frequency and the sand making power according to the historical sand making power data and the historical feeding frequency data based on a linear regression analysis method.
In the embodiment of the present invention, after controlling the frequency converter to operate according to the target feeding frequency, the method further includes: acquiring actual sand making power of a sand making machine; determining a difference value between the actual sand making power and the target sand making power; performing PID operation on the difference value in preset control time periods to obtain the adjusting feeding frequency of the frequency converter, wherein the number of the preset control time periods is multiple, and the interval time period between every two preset control time periods is a frequency maintaining time period; controlling the frequency converter to work according to the adjusted feeding frequency within a preset control time period; and keeping the feeding frequency of the frequency converter unchanged in the frequency keeping time period.
In the embodiment of the present invention, after obtaining the actual sand making power of the sand making machine, the method further includes: and carrying out filtering treatment on the actual sand making power to obtain the treated actual sand making power.
In an embodiment of the invention, the filtering process comprises a first order lag filtering process.
In the embodiment of the invention, the first time lengths corresponding to the preset control time periods are the same, the second time lengths corresponding to the frequency holding time periods are the same, and the second time lengths are greater than the preset lag time.
In the embodiment of the invention, the obtaining of the actual sand making power of the sand making machine comprises the following steps: and acquiring the actual sand making power of the sand making machine through the transmitter.
A second aspect of embodiments of the present invention provides a processor configured to execute the control method for a sand making system according to the above.
A third aspect of an embodiment of the present invention provides a control device for a sand making system, including: the processor described above.
A fourth aspect of an embodiment of the present invention provides a sand making system, including: a sand making machine; the feeding machine is connected with the sand making machine; the frequency converter is connected with the feeding machine; and the control device for the sand making system.
According to the technical scheme, the target sand making power of the sand making machine is obtained, the target feeding frequency corresponding to the target sand making power is determined according to the target sand making power based on the relation between the predetermined feeding frequency and the sand making power, and the frequency converter is controlled to work according to the target feeding frequency so as to control the feeding speed of the feeding machine through the frequency converter. In an actual application scene, the voltage of the sand making machine may change along with the change of the voltage of a power grid in different power utilization periods, and under the condition that the load of the sand making machine is not changed, the change causes the current of the sand making machine to change, so that the sand making system is adjusted by mistake.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 schematically illustrates a flow diagram of a control method for a sand production system in an embodiment of the invention;
FIG. 2 schematically illustrates a flow diagram of a control method for a sand production system in another embodiment of the invention;
FIG. 3 schematically illustrates a block diagram of a sampling control system for a large hysteresis process in one embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Fig. 1 schematically shows a flow diagram of a control method for a sand making system in an embodiment of the invention. As shown in fig. 1, in the embodiment of the present invention, a control method for a sand making system is provided, where the sand making system includes a sand making machine, a feeder and a frequency converter, and the control method is applied to a processor for description, and the control method may include the following steps:
and S102, acquiring target sand making power of the sand making machine.
And step S104, determining a target feeding frequency corresponding to the target sand making power according to the target sand making power based on the relationship between the predetermined feeding frequency and the sand making power.
And S106, controlling the frequency converter to work according to the target feeding frequency so as to control the feeding speed of the feeding machine through the frequency converter.
The system comprises a sand making machine, a feeding machine and a frequency converter, wherein the frequency converter is connected with the feeding machine, the feeding machine is connected with the sand making machine, the output of the frequency converter can directly influence the feeding speed of the feeding machine, namely the frequency converter can control the feeding speed of the feeding machine, and therefore the feeding speed of the feeding machine can be controlled by controlling the input frequency of the frequency converter. The target sand making power is the expected power of the sand making machine which is determined in advance. The target feeding frequency is the expected input frequency of the frequency converter corresponding to the target sand making power. The relationship between the feeding frequency and the sand making power is a predetermined and stored corresponding relationship, and may be specifically in the form of a relationship table, or in the form of an algorithm model, which may be obtained by performing model training according to historical data, for example.
Specifically, the processor may obtain a target sand making power of the sand making machine, and specifically may obtain a target sand making power of the sand making machine input by a user or a preset target sand making power of the sand making machine, and further may determine a target feeding frequency corresponding to the target sand making power according to the target sand making power based on a predetermined relationship between the feeding frequency and the sand making power. The process of controlling the feeding speed of the feeding machine by the specific frequency converter is not described in detail herein.
According to the control method for the sand making system, the target sand making power of the sand making machine is obtained, the target feeding frequency corresponding to the target sand making power is determined according to the target sand making power based on the relation between the predetermined feeding frequency and the sand making power, and then the frequency converter is controlled to work according to the target feeding frequency, so that the feeding speed of the feeding machine is controlled through the frequency converter. In an actual application scene, the voltage of the sand making machine may change along with the change of the voltage of a power grid in different power utilization periods, and under the condition that the load of the sand making machine is not changed, the change causes the current of the sand making machine to change, so that the sand making system is adjusted by mistake.
In one embodiment, the determination of the relationship of the feed frequency to the sand making power comprises: acquiring historical sand making power data and historical feeding frequency data of a sand making system; and determining the relation between the feeding frequency and the sand making power according to the historical sand making power data and the historical feeding frequency data based on a linear regression analysis method.
It can be understood that the historical sand making power data is historical power data of the sand making machine, and the historical feeding frequency data is historical frequency data of a frequency converter corresponding to the historical sand making power data.
Specifically, the processor may obtain historical sand making power data and historical feed frequency data for the sand making system, such that a relationship of feed frequency to sand making power may be determined from the historical sand making power data and the historical feed frequency data based on a linear regression analysis method.
In the embodiment of the application, a large amount of historical data is collected, and self-learning is carried out based on a linear regression analysis method, so that the relation between the feeding frequency and the sand making power can be obtained, and the accuracy of the relation is ensured.
In one embodiment, after controlling the frequency converter to operate according to the target feeding frequency, the method further comprises the following steps: acquiring actual sand making power of a sand making machine; determining a difference value between the actual sand making power and the target sand making power; performing PID operation on the difference value in preset control time periods to obtain the adjusting feeding frequency of the frequency converter, wherein the number of the preset control time periods is multiple, and the interval time period between every two preset control time periods is a frequency maintaining time period; controlling the frequency converter to work according to the feeding frequency in a preset control time period; and keeping the feeding frequency of the frequency converter unchanged in the frequency keeping time period.
It can be understood that after the frequency converter is controlled to work according to the target feeding frequency, the power of the sand making machine reaches the target sand making power, and the starting process of the sand making machine is also completed, namely the process from issuing the target sand making power to detecting that the power of the sand making machine is close to the target sand making power. In the subsequent stable operation process of the sand making machine, the processor needs to continuously and stably control the power of the sand making machine within a certain controllable range near the target sand making power so as to ensure the normal operation of the sand making system. The prior art typically employs PID control to maintain the power of the sand making machine near the target sand making power. However, the conventional PID control method has the following drawbacks: the PID control is widely applied to the design of an actual control system, a general pure lag (lag coefficient k = tau/T, tau represents a pure delay time constant, T represents an inertia time constant, and when k is less than 0.5, the PID control can be used) control system can be well realized by the PID control, but the PID control is difficult to solve for a large lag control system (k is greater than 0.5), a sand making system is a typical large lag control system, the time from the change of feeding to the change of the sand making machine load is long, and the effective control cannot be realized by the conventional PID control.
The control scheme provided by the embodiment of the invention adopts an intermittent PID control mode, specifically, a processor can acquire the actual sand making power of a sand making machine, specifically, the actual sand making power can be obtained through detection of a corresponding power sensor, or an actual power value can be determined according to a current detection value and a voltage detection value, a difference value between the actual sand making power and a target sand making power is determined, PID operation is carried out on the difference value in a preset control time period to obtain the adjusting feeding frequency of the frequency converter, wherein the number of the preset control time periods is multiple, an interval time period between each preset control time period is a frequency maintaining time period, the frequency converter is controlled to work according to the adjusting feeding frequency in the preset control time period, and the feeding frequency of the frequency converter is kept unchanged in the frequency maintaining time period. It should be understood that the preset control time periods are preset time periods using a PID control method, the number of the preset control time periods may be multiple, and the time lengths corresponding to the preset control time periods may be the same, for example, fixed periods may be used, or may be different, and may specifically be set according to actual scenes. The frequency keeping time period is a time period which does not adopt PID control and keeps the input frequency of the frequency converter unchanged, specifically is an interval time period between each preset control time period, and the time lengths of each frequency keeping time period can be the same or different, and specifically can be set according to an actual scene. The adjusting feeding frequency is the adjusting frequency of the frequency converter determined according to the difference value of the actual sand making power and the target sand making power. And controlling the frequency converter to work according to the adjusted feeding frequency in the preset control time period, namely, using the adjusted feeding frequency as the input of the frequency converter, and keeping the feeding frequency of the frequency converter at the previous moment unchanged in the frequency keeping time period, for example, using the adjusted feeding frequency at the last moment of the previous preset control time period as the feeding frequency of the frequency converter in the current frequency keeping time period.
In the embodiment of the application, aiming at the characteristic of large delay lag of a sand making system, an intermittent PID control mode is adopted, PID control is adopted in a preset control time period, PID control is not adopted in a frequency holding time period, the feeding frequency of the current frequency converter is kept unchanged until the next preset control time period comes, the actions are repeated, and the deviation value of the controlled parameter is corrected step by step until the control system reaches a stable state. In short, the core idea of this control scheme is: the control action is slower and weaker when the tuning is equal, so that the phenomenon of disorder of the control system caused by large delay lag can be relieved, the overshoot is reduced, the system is stable as soon as possible, and the stability of the control system is improved.
In one embodiment, after acquiring the actual sand making power of the sand making machine, the method further comprises: and carrying out filtering treatment on the actual sand making power to obtain the treated actual sand making power.
Specifically, after the processor obtains the actual sand making power of the sand making machine, the obtained actual sand making power can be filtered to obtain the processed actual sand making power, so that the effects of eliminating system interference and more accurate sampling parameters are achieved.
In one embodiment, the filtering process comprises a first order lag filtering process.
Specifically, the formula of the first-order low-pass filtering process may be as follows:
Yn＝Xn*a+Yn-1*(1-a)(0<a<1)
yn represents the filtering result of the current time, xn represents the sampling value of the current time, xn-1 represents the filtering output value of the last sampling, and a represents the filtering coefficient.
In one embodiment, the first time lengths corresponding to the preset control time periods are the same, the second time lengths corresponding to the frequency holding time periods are the same, and the second time lengths are greater than the preset lag time.
It can be understood that the first time length is the time length of each preset control time period, the second time length is the time length of each frequency maintaining time period, the first time lengths are the same, namely PID control is adopted in a fixed time period, and the second time lengths are the same, namely the interval time lengths of the fixed time period are the same, so that control is convenient. The preset delay time is the pure delay time of the sand making system which is determined in advance, and the second time length is longer than the preset delay time, so that the influence caused by the delay time of the system can be eliminated, the overshoot is eliminated, and the stability and the applicability of the system are further improved.
In one embodiment, obtaining the actual sand making power of the sand making machine comprises: and acquiring the actual sand making power of the sand making machine through the transmitter.
It can be understood that the transmitter can convert the collected current value and voltage value of the sand making machine into the actual sand making power of the sand making machine.
In the prior art, the working current of the sand making machine is used as a controlled parameter, the change of the voltage is ignored, and in reality, the voltage of a power grid can change along with the difference of power utilization periods, the change range is from 380VAC to 420VAC, and the change range has great influence on the current change and can cause system misadjustment. Secondly, the conventional PID control method has drawbacks: the PID control is widely applied to the design of an actual control system, and a general pure lag (lag coefficient k = tau/T, tau represents a pure delay time constant, T represents an inertia time constant, and when k is less than 0.5, the system can be well realized by PID control), but the system is difficult to solve by PID control for a large lag system (k is more than 0.5). The machine-made sand system (namely, the sand making system) is a typical large-lag control system, the process from the change of feeding to the change of the load of the sand making machine is long, and the conventional PID control cannot realize effective control.
Therefore, in a specific embodiment, a control method for a sand making system is provided, and the complete control process of the control method may include a starting process and a stable operation process, wherein the starting process is a process from issuing target power to detecting that sand making machine power is close to a target value, the stable operation process refers to a process in which sand making machine power continuously operates within a controllable range of the target value, and a control flow chart is shown in fig. 2.
(1) The calculation relationship of the feeding frequency and the power of the sand making machine in the starting process is as follows:
the process establishes the relation between the feeding frequency and the sand making machine power, and starts the feeding machine at the frequency corresponding to the target power to quickly reach the target value. The mathematical model established in the process can be based on a linear regression equation, and the analysis method of the linear regression equation can be as follows:
y＝bx+a
where x denotes the frequency f, y denotes the power P, x i Representing frequency sample data, y i Representing power sample data, n representing the number of samples,
represents the average of the frequency sampled samples,
represents the average of the power sample samples taken from the database, and a and b represent the model parameters.
The average of the two correlation variables is found separately for a given sample,
model parameter b = numerator/denominator, model parameter
Substituting a and b into the total formula results in a linear regression equation y = bx + a → i.e. P = bf + a.
During system debugging, a large amount of sample data is collected by means of the mathematical model, self-learning is carried out, the relational expression is derived, and higher accuracy is guaranteed.
(2) Analyzing the control relation between the feeding frequency and the sand making machine power in the stable operation process:
1. the first-order lag filtering processing is carried out on the sampling power, the system interference is eliminated, and the sampling parameters are more accurate; the filter formula is as follows:
Yn＝Xn*a+Yn-1*(1-a)(0<a<1)
yn represents the filtering result of the current time, xn represents the sampling value of the current time, xn-1 represents the filtering output value of the last sampling, and a represents the filtering coefficient.
The large hysteresis process sampling control is as follows:
the sampling control is a fixed-period intermittent PID control mode, namely, the controller carries out sampling control according to a period T, the control signal u (T) is kept unchanged between two times of sampling until the next sampling control signal arrives, the keeping time T is required to be larger than the pure lag time tau 0, and the actions are repeated, so that the deviation value of the controlled parameter is corrected step by step until the system reaches a stable state. The core idea of the control scheme is as follows: adjust one tone, wait for one, let the control action slow a little, weak.
A block diagram of a sampling control system for a large hysteresis process can be seen in fig. 3, where in fig. 3 the sampling controller is active once every sampling period T, S1, S2 representing samplers, which are switched on or off simultaneously. When the sampling controller is switched on, the sampling controller works in a closed loop mode; when the circuit is disconnected, the sampling controller stops working, the output is zero, but the controller u (t) continuously outputs through the retainer at the previous moment.
Understandably, the feeding amount is directly influenced by the feeding frequency, and simultaneously, the power of the sand making machine is also influenced, so that the feeding frequency can be controlled to realize the adjustment of the feeding amount according to the requirement of the system on the power of the sand making machine.
The technical scheme provided by the embodiment of the application has the following advantages:
1. the controlled parameters are more appropriately selected.
The selected controlled parameter in the technical scheme is the power of the sand making machine, seems to be very close to the current relation of the sand making machine in the prior art, and can be obviously different from the current relation of the sand making machine in actual control; when the current is taken as a controlled parameter, the load of the sand making machine is not changed, and when the input voltage is changed, the input current is changed along with the change of the load, so that the system is adjusted by mistake; and the power is used as a controlled parameter, the power is directly related to the load of the sand making machine, and the hidden trouble does not exist due to synchronous change.
2. In large lag process control, sampling control has advantages over conventional PID control.
The conventional PID control completely meets the control requirement in a hysteresis system with a hysteresis coefficient of less than 0.5, but for a system with large delay hysteresis, such as a sand making system, the hysteresis coefficient is generally more than 1, and the conventional PID control is introduced, so that overshoot cannot be eliminated, and even the system is rushed; the sampling control (namely, the intermittent PID control mode with fixed period) provided by the embodiment of the application is a control scheme which is provided and verified for a large time lag system, and the applicability is stronger.
An embodiment of the present invention further provides a processor configured to execute the control method for a sand making system according to the foregoing embodiment.
An embodiment of the present invention further provides a control device for a sand making system, including: according to the processor in the above embodiment.
An embodiment of the present invention further provides a sand making system, including: a sand making machine; the feeding machine is connected with the sand making machine; the frequency converter is connected with the feeding machine; and a control device for a sand making system according to the above embodiment.
The control device for a sand making system as described above may comprise a processor and a memory, the processor executing program elements stored in the memory to implement the respective functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the problem of error adjustment of the sand making system is avoided by adjusting the kernel parameters.
The memory may include volatile memory in a computer readable medium, random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), including at least one memory chip.
An embodiment of the present invention further provides a storage medium, on which a program is stored, and the program, when executed by a processor, implements the control method for a sand making system described above.
The present application also provides a computer program product adapted to execute a program initialized with the steps of the control method for a sand making system as described above when executed on a data processing device.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A control method for a sand making system, which is characterized by comprising a sand making machine, a feeder and a frequency converter, the control method comprising:
acquiring target sand making power of the sand making machine;
determining a target feeding frequency corresponding to the target sand making power according to the target sand making power based on the relation between the predetermined feeding frequency and the sand making power;
and controlling the frequency converter to work according to the target feeding frequency so as to control the feeding speed of the feeding machine through the frequency converter.
2. The control method according to claim 1, wherein the determination of the relationship between the feeding frequency and the sand making power comprises:
obtaining historical sand making power data and historical feeding frequency data of the sand making system;
and determining the relation between the feeding frequency and the sand making power according to the historical sand making power data and the historical feeding frequency data based on a linear regression analysis method.
3. The control method according to claim 1, wherein after controlling the frequency converter to operate according to the target feeding frequency, the method further comprises:
acquiring actual sand making power of the sand making machine;
determining a difference value between the actual sand making power and the target sand making power;
performing PID operation on the difference value within preset control time periods to obtain the adjusting feeding frequency of the frequency converter, wherein the number of the preset control time periods is multiple, and the interval time period between every two preset control time periods is a frequency maintaining time period;
controlling the frequency converter to work according to the adjusting feeding frequency in the preset control time period;
and keeping the feeding frequency of the frequency converter unchanged in the frequency keeping time period.
4. The control method according to claim 3, wherein after the obtaining of the actual sand making power of the sand making machine, further comprising:
and carrying out filtering treatment on the actual sand making power to obtain the treated actual sand making power.
5. The control method according to claim 4, characterized in that the filter processing includes first-order lag filter processing.
6. The control method according to claim 3, wherein first time lengths corresponding to the respective preset control time periods are the same, second time lengths corresponding to the respective frequency holding time periods are the same, and the second time lengths are greater than a preset lag time.
7. The control method according to claim 3, wherein the obtaining of the actual sand making power of the sand making machine comprises:
and acquiring the actual sand making power of the sand making machine through a transmitter.
8. A processor configured to perform the control method for a sand making system according to any one of claims 1 to 7.
9. A control device for a sand making system, comprising:
the processor of claim 8.
10. A sand production system, comprising:
a sand making machine;
the feeding machine is connected with the sand making machine;
the frequency converter is connected with the feeding machine; and
a control device for a sand making system according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211497010.1A CN115712247A (en) | 2022-11-25 | 2022-11-25 | Control method and control device for sand making system, processor and sand making system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211497010.1A CN115712247A (en) | 2022-11-25 | 2022-11-25 | Control method and control device for sand making system, processor and sand making system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115712247A true CN115712247A (en) | 2023-02-24 |
Family
ID=85234939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211497010.1A Pending CN115712247A (en) | 2022-11-25 | 2022-11-25 | Control method and control device for sand making system, processor and sand making system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115712247A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116280897A (en) * | 2023-05-16 | 2023-06-23 | 三一重型装备有限公司 | Automatic feeding adjustment control method and system, storage medium and sand making building |
| CN116273425A (en) * | 2023-03-21 | 2023-06-23 | 郑州水工机械有限公司 | Control method and control system of sand making building |
| CN116360369A (en) * | 2023-03-29 | 2023-06-30 | 山东农业工程学院 | Intelligent batching control method and system for ceramic blade |
-
2022
- 2022-11-25 CN CN202211497010.1A patent/CN115712247A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116273425A (en) * | 2023-03-21 | 2023-06-23 | 郑州水工机械有限公司 | Control method and control system of sand making building |
| CN116273425B (en) * | 2023-03-21 | 2024-06-04 | 郑州水工机械有限公司 | Control method and control system of sand making building |
| CN116360369A (en) * | 2023-03-29 | 2023-06-30 | 山东农业工程学院 | Intelligent batching control method and system for ceramic blade |
| CN116360369B (en) * | 2023-03-29 | 2024-04-19 | 山东农业工程学院 | Intelligent batching control method and system for ceramic blade |
| CN116280897A (en) * | 2023-05-16 | 2023-06-23 | 三一重型装备有限公司 | Automatic feeding adjustment control method and system, storage medium and sand making building |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115712247A (en) | Control method and control device for sand making system, processor and sand making system | |
| KR900005546B1 (en) | Adaptive process control system | |
| JP7559238B2 (en) | Apparatus, method and system for regulating constant voltage output of a power supply | |
| CN113296390B (en) | Position-based PID control method and terminal | |
| CN106773652A (en) | A kind of PID systems and its parameter automatic adjusting method | |
| CN111697901B (en) | Control method, control equipment and control system of servo motor | |
| JPH0534682B2 (en) | ||
| CN117075466B (en) | PID controller parameter setting method and device, electronic equipment and storage medium | |
| JPH0778007A (en) | Analog signal processor for programmable controller | |
| CN109067284A (en) | A kind of motor control method and device based on filtering error | |
| EP2860594A1 (en) | PID control system tuning based on relay-feedback test data | |
| CN107979317A (en) | Permanent magnet synchronization motor spindle weak magnetic speed regulating method | |
| JP4698026B2 (en) | Improved servo mechanism control method | |
| Hryniuk et al. | Approximation PID-controllers through deadbeat controller and its tuning | |
| CN117555221B (en) | Flow control method, equipment and medium based on variable period PID control | |
| CN111077772A (en) | Tracking control method and device based on servo drive and computer equipment | |
| CN111258264B (en) | Filtering method and device for field noise, storage medium and processor | |
| CN116938613B (en) | Dormancy method of monitoring sensor based on nonlinear information age and electronic equipment | |
| CN113259600B (en) | Exposure parameter configuration method and device, electronic equipment and medium | |
| CN116754831B (en) | Harmonic interference resistant frequency measurement method and device applied to intelligent circuit breaker | |
| CN113267679B (en) | Phase signal detection/control method, circuit, control device and medium | |
| Falconi et al. | A novel robust control strategy for industrial systems with time delay | |
| CN117742132A (en) | Method, device, equipment and computer readable medium for controlling water quality parameters | |
| JPH02273804A (en) | Parameter control method for pid controller | |
| SU932460A1 (en) | Self-adjustable control system for objects with delay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |