CN107942728A - A kind of embedded electrofusion magnesium stove runs feedback control experimental system - Google Patents
A kind of embedded electrofusion magnesium stove runs feedback control experimental system Download PDFInfo
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- CN107942728A CN107942728A CN201711222937.3A CN201711222937A CN107942728A CN 107942728 A CN107942728 A CN 107942728A CN 201711222937 A CN201711222937 A CN 201711222937A CN 107942728 A CN107942728 A CN 107942728A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B17/00—Systems involving the use of models or simulators of said systems
- G05B17/02—Systems involving the use of models or simulators of said systems electric
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Abstract
The invention discloses a kind of embedded electrofusion magnesium stove to run feedback control experimental system, including：For simulating the virtual objects subsystem of actual electric melting magnesium furnace industry characteristics；The algorithm development subsystem of electric melting magnesium furnace operation feedback control algorithm is applicable in for developing；For carrying out the embedded Control subsystem of operation feedback control to the virtual objects subsystem for simulating actual electric melting magnesium furnace production, the output terminal of the algorithm development subsystem connects the embedded Control subsystem, the closed-loop experiment that the embedded Control subsystem controls the virtual objects subsystem to carry out electric melting magnesium furnace based on the operation feedback control algorithm that the algorithm development subsystem generates.Said system realizes the simulation to electric melting magnesium furnace production process, verifies related complex control algorithm and control system software and hardware, reduces algorithm development and system hardware and software construction cycle, while reduce and directly carry out debugging caused risk to industry spot.
Description
Technical field
The present invention relates to industrial control technology, and in particular to a kind of embedded electrofusion magnesium stove operation feedback control experiment system
System.
Background technology
Fused magnesite is the high grade refractory that a kind of fusing point is high, inoxidizability and resistance to slag are strong, is widely used in multiple
Field, its main production equipments are three-phase alternating current electric smelting magnesium stoves.Electric melting magnesium furnace belongs to one kind of ore-smelting electric furnace, is typical high consumption
Can equipment.The index for reflecting efficiency in fusion process is single ton of energy consumption of product, and single ton of energy consumption has with size of current
Direct relation, therefore the accurate control of size of current is for improving electric-melting magnesium yield, improving product grade, reduction energy consumption tool
It is significant.In order to realize the target for reducing single ton of energy consumption of product as far as possible on the premise of yield is ensured, electric melting magnesium furnace is actual
Need to use the operation feedback control strategy with electric current optimal setting and Trace-on-Diagram control double-layer structure in control system.
At present, since in smelting process of electro-fused magnesia furnace, disturbance is complicated and changeable, alternating current arc impedance and induction reactance are with very strong
It is non-linear, there is coupling, and working condition change is frequent, material composition fluctuation, produces ring in addition between three-phase electrode electric current
Border is severe, and existing control method is difficult to control single ton of energy consumption in enterprise's phase target range, it is necessary to study electric melting magnesium furnace
Complex control algorithm, to improving product quality, improves production efficiency, saving energy etc. and is of great significance.But at present
Lack control algorithm validation platform, therefore develop electric melting magnesium furnace operation feedback control experimental system and be used for the verification of control algolithm very
It is necessary.
The content of the invention
For the problems of the prior art, the present invention provides a kind of embedded electrofusion magnesium stove operation feedback control experiment system
System.
The present invention provides a kind of embedded electrofusion magnesium stove operation feedback control experimental system, including：
For simulating the virtual objects subsystem of actual electric melting magnesium furnace industry characteristics；
The algorithm development subsystem of electric melting magnesium furnace operation feedback control algorithm is applicable in for developing；
For carrying out the embedded control of operation feedback control to the virtual objects subsystem for simulating actual electric melting magnesium furnace production
Subsystem,
The output terminal of the algorithm development subsystem connects the embedded Control subsystem, the embedded Control subsystem
The operation feedback control algorithm based on algorithm development subsystem generation of uniting controls the virtual objects subsystem to carry out electric smelting
The closed-loop experiment of magnesium stove.
Alternatively, the algorithm development subsystem is connected with the embedded Control subsystem using Ethernet interface mode,
The virtual objects subsystem is connected with the embedded Control subsystem using serial mode.
Alternatively, the nextport hardware component NextPort of the virtual objects subsystem and the nextport hardware component NextPort of algorithm development subsystem are mutually only
It is vertical.
Alternatively, in closed-loop experiment, the output of the virtual objects subsystem includes：Three-phase electrode current model is defeated
Go out, i.e. current information and single ton of energy consumption model output, i.e. single ton of consumption information of product.
Alternatively, the model of the virtual objects subsystem operation includes：Using motor speed frequency as input, three-phase electrode
Electric current is the current model of output；Using three-phase electrode electric current and voltage as input, single ton of energy consumption is single ton of energy consumption model of output.
Alternatively, the virtual objects model interface of the virtual objects subsystem is used to show current model and single ton of energy consumption
Parameter and information during model running.
Alternatively, the embedded Control subsystem includes monitoring module, and the monitoring module is used to calculate in the control
Process variable is monitored in the operational process of method；
The process variable includes：Three-phase electrode electric current, three-phase electrode voltage, three phase electric machine speed-frequency and/or electric current
Setting value.
Alternatively, the embedded Control subsystem includes：
The embedded controller of monitoring module is connected, the embedded controller connects the algorithm development subsystem and institute
State virtual objects subsystem.
Alternatively, the operation feedback control algorithm that the algorithm development subsystem ultimately produces includes：
The operation feedback control algorithm that embedded type C code is realized；
The algorithm development subsystem includes：
The operation feedback control algorithm that user is realized by non-embedded C code is automatically converted to embedded type C code reality
Existing operation feedback control algorithm.
Alternatively, the algorithm development subsystem includes：
The operation feedback control algorithm that user is realized by MATLAB is automatically converted to the corresponding operation of embedded type C code
Feedback control algorithm.
It is the device have the advantages that as follows：
The present invention is developed by core of embedded controller, and the controller is with disposal ability is strong, integrated level is high, right
Complicated algorithm tenability is strong, programming is simple, is easy to the features such as networking, can realize current loop tracing control, electric current setting
It is worth the functions such as optimization, process monitoring.Compared with traditional control system, the construction cycle can be shortened, reduce development difficulty, saving is opened
Send out cost etc.；
The system of the present embodiment simulates electric melting magnesium furnace production process, is able to verify that related complex control algorithm and control
System hardware and software processed, reduces algorithm development and system hardware and software construction cycle, while reduces and directly adjusted to industry spot
Risk caused by examination.
Further, said system can be used among teaching, the knowledge acquired can such as model, recognized by student,
Design of controller etc. is emulated and verified on this system, so as to deepen their understandings to relevant knowledge.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural representation that the embedded electrofusion magnesium stove that one embodiment of the invention provides runs feedback control experimental system
Figure；
Fig. 2 is the schematic diagram of the virtual objects model interface for the virtual objects subsystem that one embodiment of the invention provides；
Fig. 3 is the schematic diagram of the monitoring interface for the embedded Control subsystem that one embodiment of the invention provides.
Embodiment
In order to preferably explain the present invention, in order to understand, below in conjunction with the accompanying drawings, by embodiment, to this hair
It is bright to be described in detail.
In the following description, multiple and different aspects of the present invention will be described, however, for common skill in the art
For art personnel, the present invention can be implemented just with some or all structures or flow of the present invention.In order to explain
Definition for, specific number, configuration and order are elaborated, however, it will be apparent that in the situation without these specific details
Under can also implement the present invention.In other cases, will no longer for some well-known features in order not to obscure the present invention
It is described in detail.
As shown in Figure 1, Fig. 1 shows the structure diagram of embedded electrofusion magnesium stove operation feedback control experimental system, this
The embedded electrofusion magnesium stove operation feedback control experimental system of embodiment mainly includes virtual objects subsystem, algorithm development subsystem
Three system, embedded Control subsystem parts.
Wherein, virtual objects subsystem can simulate actual electric melting magnesium furnace industry characteristics, and algorithm development subsystem is used to set
Count complex control algorithm, and embedded Control subsystem can to simulate virtual objects subsystem that actual electric melting magnesium furnace produce into
Row operation feedback control, while process monitoring can be carried out.
The output terminal connection embedded Control subsystem of the algorithm above development subsystem, above-mentioned embedded Control subsystem
Operation feedback control algorithm based on the generation of algorithm development subsystem controls the virtual objects subsystem to carry out electric melting magnesium furnace
Closed-loop experiment.
The hardware components of virtual objects subsystem and algorithm development subsystem in the present embodiment use but are not limited to work
Industry control computer.
The hardware components of above-mentioned embedded Control subsystem are realized by embedded controller and industrial LCD and formed.Its
In, embedded controller, which uses but is not limited to the embedded type CPU mainboard based on Intel Atom E3800 series processors, to be made
For processor master control borad.
Used between above-mentioned virtual objects subsystem and embedded Control subsystem hardware but be not limited to serial ports progress
Connection, realizes data transfer；Then use but be not limited between algorithm development subsystem and embedded Control subsystem hardware with
Too network interface is attached, and realizes data transfer.
In the present embodiment, the interface of virtual objects subsystem and embedded Control subsystem is using full duplex
RS232 interface, RS232 interface can send and receive data at the same time, it is only necessary to which both are connected and then realized by a Serial Port Line
Data transfer.
To be better understood from the content of the present embodiment, the programming to each system and calculating process carry out specifically below
It is bright.
Virtual objects subsystem software part：
Virtual objects subsystem software part is developed by the prototype software based on MATLAB/M file developments and based on Wincc
Virtual objects model interface two parts composition, which is that can simulate real electric melting magnesium furnace industry characteristics.
In the present embodiment, the prototype software in virtual objects subsystem software mainly runs single ton of energy consumption model and current-mode
Type.
Single ton of energy consumption model refers to single ton of energy consumption of fusion process product and melting electric current, melting voltage, electric power system
Correspondence between multiple variables such as power factor, arc length coefficient, feed time interval, integrated heat efficiency；
Current model refers to that three-phase electrode electric current and the controlled quentity controlled variable of controller output control what three-phase electrode moved up and down
The correspondence that the speed-frequency of motor changes over time.
Virtual objects model interface in virtual objects subsystem software can be such that experimenter/operating personnel grasp in real time
Every terms of information during training pattern (current model and single ton of energy consumption model), including the curve of three-phase electrode electric current, voltage and
The real-time display of each performance indicator, and model selection and model parameter setting etc. can be carried out, so as to effectively realize man-machine friendship
Mutual function.
Virtual objects subsystem includes virtual objects model and model interface two parts.Virtual objects model includes current-mode
Type and single ton of energy consumption model.
Virtual objects model：Actual electric melting magnesium furnace industry spot production process can be simulated, it is true to reflect three-phase electrode electricity
Flow step response.Model interface：Being capable of display model training effect.
In virtual objects subsystem operational process, transmit, pass through with the controller real-time data of embedded Control subsystem
Current model and the current value of single ton of energy consumption model output, single ton of energy consumption are sent to embedded controller by serial ports.Embedded control
Device processed can adjust three phase electric machine speed-frequency by running feedback control algorithm and be output to virtual objects subsystem, so that three
Phase current being capable of tenacious tracking current setting value；Current setting value can be optimized according to preset time period at the same time, so that single ton of energy
Energy consumption enough reaches desired value.
Algorithm development system software part：
Algorithm development subsystem software part is by the operation feedback control algorithm software developed based on MATLAB/Simulink
With the algorithm monitoring software composition developed based on Wincc, which is to design and Implement complex control algorithm.
Algorithm monitoring software in algorithm development subsystem software has real-time monitoring and control, mainly includes control algolithm knot
Structure, controller parameter identification curve, controller parameter setting etc., while some controller important parameters can be adjusted in real time and caused
Control effect is optimal.
Embedded Control subsystem software part：
Monitoring software of the embedded Control subsystem software by running control software and based on QT exploitations forms, this is embedded
Control subsystem software function is to realize current loop control, electric current optimal setting and process monitoring.
Running control software in embedded Control subsystem software can adjust electric current in real time according to current operating conditions
Setting value, while ensure that three-phase electrode electric current being capable of tenacious tracking current setting value.
Monitoring software in embedded Control subsystem software was monitored for monitoring complex control algorithm operational effect
Cheng Bianliang, process variable may include current setting value, three-phase electrode electric current, three phase electric machine rotational frequency and single ton of consumption information
Deng.
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
The embedded electrofusion magnesium stove operation feedback control experimental system of the present embodiment includes three subsystems, such as the institute of attached drawing 1
Show, be respectively virtual objects subsystem, algorithm development subsystem and embedded Control subsystem；
Embedded controller in embedded Control subsystem is selected based on Intel Atom E3800 series processors
Embedded type CPU mainboard includes monokaryon 1.46GHz to four core 1.91GHz, height can be integrated in plate as processor master control borad, its dominant frequency
Up to the memory on board of the DDR3L-1067/1333M of 4GB, while the plate provides VGA, single channel LVDS, USB interface, Ethernet
Interface, serial ports, PS/2 keyboard and mouses, GPIO etc. abundant I/O interface.Since the controller has, disposal ability is strong, integrated level
Height, strong to complicated algorithm tenability, programming is simple, is easy to the features such as networking, fully meets the requirement for realizing required function.
Communicated between virtual objects subsystem and embedded Control subsystem hardware by RS232 serial bus, i.e.,
Embedded Control subsystem obtains three-phase electricity flow valuve, magnitude of voltage and single ton of energy consumption from virtual objects subsystem, and is divided
Analysis obtains corresponding controlled quentity controlled variable with optimization, and virtual objects subsystem is given by Serial Port Transmission；
Realized and communicated by Ethernet interface between algorithm development subsystem and embedded Control subsystem hardware, is i.e. algorithm
The algorithm control program file of development subsystem generation is downloaded to embedded controller using remote transmission instrument by Ethernet
In；
Virtual objects subsystem software part includes virtual objects prototype software and virtual objects model interface, specific implementation
Step includes：
Step 1：Using MATLAB/M file edit current models, the model is using motor speed frequency as input, three-phase electricity
Electrode current is output, and is packaged into interface function.
Step 2：Using single ton of energy consumption model of MATLAB/M file edits, the model is using three-phase electrode electric current, voltage to be defeated
Enter, single ton of energy consumption is output, and is packaged into interface function.
Step 3：Virtual objects model interface is drawn using WINCC configuration softwares, as shown in Figure 2, which includes real
Border three-phase electrode current curve, the three-phase electrode current curve tried to achieve by model, single ton of energy consumption and related performance indicators etc.,
Meanwhile devise model selection and model parameter setting button；
Step 3.1：Rendering model selection interface, when different models carry out simulating, verifying when can be switched fast, easy to pair
Than the fitting effect of each model, preferably model is chosen；
Step 3.2：Rendering model parameter setting interface, real time modifying relevant parameter when being verified for model emulation, can
Optimized model；
Step 4：Real-time data transmission is carried out by OPC modes between virtual objects model and model interface, wherein
MATLAB is as OPC client, and WINCC is as opc server end.
Algorithm development subsystem software part is by the operation feedback control algorithm software developed based on MATLAB/Simulink
With the algorithm monitoring software composition developed based on Wincc.
Operation feedback control algorithm software in algorithm development subsystem software uses MATLAB/Simulink tool designs
Complex control algorithm, completes control algolithm Simulink model buildings, then, will be built using the RTW tool boxes of MATLAB
Graphical model be converted to embedded type C code, and the executable file under a variety of environment is generated according to target configuration, then pass through
Ethernet is downloaded this file into embedded Control subsystem and performed.
That is, algorithm development subsystem builds electric melting magnesium furnace operation feedback control using MATLAB/Simulink instruments
Algorithm Simulink models processed, and emulation testing is realized in algorithm development subsystem to it.After test passes through, RTW works are utilized
It is C code to have case by the model conversion, and is downloaded to embedded controller.
It will be appreciated that the operation feedback control algorithm run in embedded controller is the corresponding fortune of embedded type C code
Row feedback control algorithm；
Algorithm development subsystem in the present embodiment has：The operation that user is realized by non-embedded C code is fed back
Control algolithm is automatically converted to the function of the corresponding operation feedback control algorithm of embedded type C code.That is, have and pass through user
The operation feedback control algorithm that MATLAB is realized is automatically converted to the work(of the corresponding operation feedback control algorithm of embedded type C code
Energy.
Algorithm monitoring software in algorithm development subsystem software is using Wincc design monitoring interfaces, including control algolithm
Structure, controller parameter identification curve, controller parameter etc., meanwhile, can adjustment parameter variable in real time, it is ensured that controller can
Operate in optimum state.
The algorithm development subsystem of the present embodiment mainly develops algorithm, and generation control program, downloads to embedded Control
In device.
Embedded Control subsystem software be under Linux embedded OS environment, realize running control software with
And the exploitation of monitoring software；
Running control software in embedded Control subsystem software mainly includes electric current optimal setting control program and electricity
Flow back to road control program.It is as follows to implement step：
Step S1：Feedback control algorithm is run according to the three-phase current of offer, voltage and single ton of energy consumption data, can be determined
Plan goes out current setting value optimal under current state so that three-phase current can be stablized near best operating point；
Step S2：The input that the current setting value that decision-making goes out is controlled as current loop, is calculated using PID control method
The rotational frequency and rotation direction of motor, by current model of the Serial Port Transmission to virtual objects subsystem, and current model is then
Output three-phase electrode current value is given in embedded controller, so as to form closed-loop control so that three-phase current can be stablized
Near best operating point, that is, current setting value, desired single ton of energy consumption can be finally obtained；
Monitoring software in embedded Control subsystem software is developed based on QT, for monitoring the operation of complex control algorithm
Effect, while relevant parameter can be set to realize human-computer interaction, it is as follows that it implements step；
Step M1：Control (Push Button, Label, Text Edit, the Table Widget given using QT softwares
Deng) integral layout is carried out to monitoring interface, including draw three-phase electrode current curve, three phase electric machine rotational frequency curve, single ton
Energy consumption curve and display related performance indicators etc.；
Step M2：The attribute of each control, such as font color, font size, button actions, curvilinear coordinate length are set
With coordinate gap etc., its interface is as shown in Figure 3；
Step M3：The execution function and signal triggering function of each control are write, it is real by the signal and mechanism slot of QT
Communication between existing different controls；
Step M4：Configuration serial ports and timer are used for real-time data transmission, while set current loop to control the sampling time
And current closed-loop setting renewal time；
Step M5：Timer 1s performs a Data Read Function, realizes embedded Control subsystem and virtual objects
The data real-time, interactive of system.
Finally it should be noted that：Above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation；Although the present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：
It can still modify the technical solution described in previous embodiment, or to which part or all technical characteristic into
Row equivalent substitution；And these modifications or substitutions, the essence of appropriate technical solution is departed from various embodiments of the present invention technical side
The scope of case.
Claims (10)
1. a kind of embedded electrofusion magnesium stove runs feedback control experimental system, it is characterised in that including：
For simulating the virtual objects subsystem of actual electric melting magnesium furnace industry characteristics；
The algorithm development subsystem of electric melting magnesium furnace operation feedback control algorithm is applicable in for developing；
For carrying out embedded Control of operation feedback control to the virtual objects subsystem for simulating actual electric melting magnesium furnace production
System,
The output terminal of the algorithm development subsystem connects the embedded Control subsystem, the embedded Control subsystem base
The virtual objects subsystem is controlled to carry out electric melting magnesium furnace in the operation feedback control algorithm of algorithm development subsystem generation
Closed-loop experiment.
2. system according to claim 1, it is characterised in that the algorithm development subsystem and embedded Control
System is connected using Ethernet interface mode, and the virtual objects subsystem and the embedded Control subsystem use serial mode
Connection.
3. system according to claim 1, it is characterised in that the nextport hardware component NextPort and algorithm of the virtual objects subsystem are opened
The nextport hardware component NextPort for sending out subsystem is separate.
4. system according to claim 1, it is characterised in that in closed-loop experiment, the virtual objects subsystem it is defeated
Go out including：Three-phase electrode current model exports, i.e. current information and single ton of energy consumption model output, i.e. single ton of consumption information of product.
5. system according to claim 4, it is characterised in that the model of the virtual objects subsystem operation includes：With
The current model that motor speed frequency is input, three-phase electrode electric current is output；It is single using three-phase electrode electric current and voltage as input
Ton energy consumption is single ton of energy consumption model of output.
6. system according to claim 5, it is characterised in that the virtual objects model interface of the virtual objects subsystem
For showing parameter and information in current model and single ton of energy consumption model operational process.
7. system according to claim 1, it is characterised in that
The embedded Control subsystem includes monitoring module, and the monitoring module is used for the operational process in the control algolithm
Middle monitoring process variable；
The process variable includes：Three-phase electrode electric current, three-phase electrode voltage, three phase electric machine speed-frequency and/or electric current setting
Value.
8. system according to claim 7, it is characterised in that the embedded Control subsystem includes：
The embedded controller of monitoring module is connected, the embedded controller connects the algorithm development subsystem and the void
Intend object subsystem.
9. system according to any one of claims 1 to 8, it is characterised in that what the algorithm development subsystem ultimately produced
Operation feedback control algorithm includes：
The operation feedback control algorithm that embedded type C code is realized；
The algorithm development subsystem includes：
The operation feedback control algorithm that user is realized by non-embedded C code is automatically converted to the realization of embedded type C code
Run feedback control algorithm.
10. system according to claim 9, it is characterised in that the algorithm development subsystem includes：
The operation feedback control algorithm that user is realized by MATLAB is automatically converted to the corresponding operation feedback of embedded type C code
Control algolithm.
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