CN109324818A - Virtualized server master system and related upgrade technique - Google Patents
Virtualized server master system and related upgrade technique Download PDFInfo
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- CN109324818A CN109324818A CN201811129883.0A CN201811129883A CN109324818A CN 109324818 A CN109324818 A CN 109324818A CN 201811129883 A CN201811129883 A CN 201811129883A CN 109324818 A CN109324818 A CN 109324818A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/70—Software maintenance or management
- G06F8/71—Version control; Configuration management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/4557—Distribution of virtual machine instances; Migration and load balancing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
- G06F9/45558—Hypervisor-specific management and integration aspects
- G06F2009/45595—Network integration; Enabling network access in virtual machine instances
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Abstract
A kind of virtualized server master system and related upgrade technique；The virtualized server master system includes: physical vlan server (100), thin-client A, thin-client B；The first virtual machine (110) and the second virtual machine (120) are configured in the physical vlan server (100)；After operating system in engineer station's industrial personal computer (210) and operator station industrial personal computer (220) and application program encapsulation, being packaged, the virtual machine file difference seamless migration being converted into is run in the first virtual machine (110) and the second virtual machine (120), and in the virtual machine；By thin-client A and thin-client B remote access the first virtual machine (110) and the second virtual machine (120), the operation to former host computer procedure is realized；Virtualized server master system of the invention and related upgrade technique are ingenious in design, practical.
Description
Technical field
The present invention relates to industrial computer field, automation field more particularly to a kind of virtualized server host computers
System and related upgrade technique.
Background technique
Computer is widely used in digital instrument control system of nuclear power plant, but since computer hardware life cycle is short, calculates
Quickly, it is out-of-date to be easy for machine technological innovation replacement speed, and the superseded upgrade job of computer faces many problems and challenge.Computer
Hardware device development is swift and violent, often faces the problems such as spare part is eliminated, and needs to be upgraded using new hardware device.For correlation
The software systems such as operating system, application software, itself be not present failure and problem of aging, but with the hardware system after upgrading
Often there is a problem of incompatible.And software systems are also constantly rising for the development for adapting to hardware and self-growth demand
Therefore version when carrying out eliminating upgrading to hardware device, is usually associated with the liter version of software systems, and the purchase cost of software
It is general all very high.In addition, the feelings eliminated or without maintenance may be faced for the application software of certain minorities or specific use
Condition, duration not can guarantee, and just need to redesign application file when carrying out upgrade job in this way.Therefore, computer
Superseded management is the inevitable part of power plant's technology life cycle.
It studies the superseded type of computer, eliminate the problems such as risk, measure of sifting out and measure of sifting out scope of application, to nuclear power
Cost control, safe and stable operation of factory etc. are of great significance.Wherein computer tradition measure of sifting out mainly include the following types:
Equivalence replacement, the longer superseded period hardware of selection, the buying of spare part defense etc..Certain server as scene uses is washed in a pan in the market
After eliminating halt production, if field device damage will be unable to be repaired or replaced, the longer another kind of life cycle is usually selected at this time
Server carries out equivalent substitution, and purchases enough spare parts.But such measure of sifting out also will receive limitation, for certain special feelings
Condition, if industrial software authorization has been lost since the time is remote, certain maintenance tool computer glitch damages lack of competence refitting, and producer refuses
Situations such as providing support absolutely, can not reinstall having spare part, above-mentioned traditional measures all will be unable to solve at this time.
Specifically, as shown in Figure 1, Fig. 1 shows a kind of host computer system of SDA desalination water production system of existing nuclear power plant
The framework schematic diagram of system.The master system includes two industrial personal computers；The operating system of two industrial personal computers is Windows XP,
Host computer HMI software is intouch10.0, and programming software is RS Logix5000.As master system is run for many years,
Often there is situations such as low-response, crash in industrial personal computer hardware aging, and industrial personal computer main hardware has stopped production, and seriously affects control
System reliability processed is badly in need of carrying out upgrading to master system.
Simultaneously as the upgrading of computer, industrial personal computer operating system is commonly Windows7 system, former industry control at present
Machine software version is lower, poor with new Compatibility of Operating System, often occur crashing, picture display is abnormal, communication is unstable and
Phenomena such as loss of data, exists simultaneously the problem of programming software authorization loss causes refitting that can not authorize.Upgrade according to tradition
Scheme need to be equal by its operating system, host computer HMI software and programming software while regenerating to industrial personal computer HardwareUpgring
Upgraded, that is, needs to upgrade the enclosed part of dotted line in Fig. 1.In addition, can still exist because of software and hardware system after upgrading
Same problem caused by upgrading, later maintenance is limited and can expend a large amount of properties.
Summary of the invention
The present invention in view of the above technical problems, proposes a kind of virtualized server master system and related upgrading skill
Art.
Technical solution proposed by the invention is:
The invention proposes a kind of master system upgrade method, master system includes engineer station's industrial personal computer and operation
Member station industrial personal computer, engineer station's industrial personal computer respectively with switch A and switch b communication connection, also distinguish by operator station industrial personal computer
With switch A and switch b communication connection；Switch A also respectively with the first controller and second controller communication connection, exchanges
Machine B also respectively with the first controller and second controller communication connection, the master system upgrade method the following steps are included:
Step S1, physical vlan server is provided, and configures the first virtual machine and second in the physical vlan server
Virtual machine；After the operating system and application program encapsulation, packing in engineer station's industrial personal computer, it is converted into the first virtual machine file
And by its seamless migration to the first virtual machine, and run in first virtual machine；By the behaviour in operator station industrial personal computer
After making system and application program encapsulation, being packaged, it is converted into the second virtual machine file and by its seamless migration to the second virtual machine, and
It is run in second virtual machine；
Step S2, thin-client A corresponding with the second virtual machine is provided, by thin-client A and physical vlan server
Communication connection；Thin-client B corresponding with the first virtual machine is provided, thin-client B and the communication of physical vlan server are connected
It connects；
Step S3, and the corresponding external switch A A of the first virtual machine and external friendship corresponding with the second virtual machine is provided
Change planes BB；By the communication connection of switch A and operator station industrial personal computer, it is directly logical with physical vlan server to be changed to switch A
News connection；By the communication connection of switch A and engineer station's industrial personal computer, it is changed to switch A and passes through external switch A A and virtual
Physical server communication connection；By the communication connection of switch b and engineer station's industrial personal computer, it is changed to switch b directly and virtually
Physical server communication connection；By the communication connection of switch b and operator station industrial personal computer, it is changed to switch b and passes through external friendship
It changes planes BB and physical vlan server communication connection.
The invention also provides a kind of virtualized server master systems, comprising:
Physical vlan server is configured with the first virtual machine and the second virtual machine in the physical vlan server；Engineer
Stand operating system and application program encapsulation in industrial personal computer, be packaged after, the first virtual machine file seamless migration being converted into is first
In virtual machine, and run in first virtual machine；Operating system and application program encapsulation, packing in operator station industrial personal computer
Afterwards, the second virtual machine file seamless migration being converted into is run in the second virtual machine, and in second virtual machine；
Thin-client A, it is corresponding with the second virtual machine, and with physical vlan server communication connection；
Thin-client B, it is corresponding with the first virtual machine, and with physical vlan server communication connection；
Switch A also passes through external switch A A and physical vlan service directly with physical vlan server communication connection
Device communication connection；
Switch b also passes through external switch b B and physical vlan service directly with physical vlan server communication connection
Device communication connection；
Switch A also respectively with the first controller and second controller communication connection, switch b yet respectively with first control
Device and second controller communication connection processed.
The upgrade method of the above-mentioned virtualized server master system of the present invention, comprising the following steps:
Step ST1, a new physical vlan server is provided, by the original physical vlan of virtualized server master system
The first virtual machine and the second virtual machine in server are deployed or are moved on new physical vlan server；
Step ST2, the original physical vlan of new physical vlan server replacement virtualized server master system is taken
Business device comes logical with thin-client A, thin-client B, external switch A A, external switch b B, switch A and switch b respectively
News connection.Virtualized server master system and related upgrade technique of the invention, so that new system maintains original after upgrading
All monitoring functions of system, only user's log-in interface increases remote operation step, to the normal work of operation operator
It has no effect.This upgrading scheme replaces traditional industrial personal computer to upgrade mode using the virtualized server network architecture, solves work
The problems such as the halt production of control machine hardware can not be replaced, and soft ware authorization loss can not be reset avoid computer software and hardware upgrading and draw
The need risen frequently buy industrial personal computer and soft ware authorization problem, and the hot redundancy of hardware is configured in virtual server, host computer and control
Device communication realize four redundancies, while configure cold standby active station for emergency when use, maximize guarantee host computer under failure industry control
Stable operation.By virtual technology by the operating system being eliminated on server, application program bulk migration to virtual environment,
Upgrade job rapid and convenient.In addition, using virtualized server upgrading scheme, it is only necessary to buy a server, two Thin clients
End and a set of VMware soft ware authorization upgrade mode save the cost about 70%, and server next service life compared to traditional industrial personal computer
All end of term are easy to maintain, are truly realized cost efficiency.Virtualized server master system of the invention and related upgrading skill
Art is ingenious in design, practical.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 shows a kind of framework schematic diagram of the master system of SDA desalination water production system of existing nuclear power plant；
Fig. 2 shows the framework schematic diagrames of the virtualized server master system of the preferred embodiment of the present invention.
Specific embodiment
The technical problems to be solved by the present invention are: as master system is run for many years, industrial personal computer hardware aging, often
There is situations such as low-response, crash, and industrial personal computer main hardware has stopped production, seriously affects reliability control system, urgent need pair
Master system carries out upgrading.The technical thought that the present invention is proposed with regard to the technical problem is: using physical vlan service
Device；And two virtual machines are equipped in physical vlan server, the operating system of two original industrial personal computers is separately operable with this
And application software.Meanwhile it for two virtual machines being equipped with two thin-clients and carries out pictures and showing and operation.
In order to keep technical purpose of the invention, technical solution and technical effect apparent, in order to art technology
Personnel understand and implement the present invention, and the present invention will be further described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Fig. 2, Fig. 2 shows the signals of the framework of the virtualized server master system of the preferred embodiment of the present invention
Figure.The present embodiment proposes a kind of master system upgrade method, is applied to master system as shown in Figure 1, on this
Position machine system includes engineer station's industrial personal computer 210 and operator station industrial personal computer 220, engineer station's industrial personal computer 210 respectively with exchange
Machine A and switch b communication connection, operator station industrial personal computer 220 also respectively with switch A and switch b communication connection；Interchanger
A respectively with 240 communication connection of the first controller 230 and second controller, switch b also respectively with the first controller 230 and
Two controllers, 240 communication connection.In this way, engineer station's industrial personal computer 210 by switch A realize respectively with the first controller 230
With 240 communication connection of second controller, also realized by switch b logical with the first controller 230 and second controller 240 respectively
News connection；Operator station industrial personal computer 220 is realized by switch A and is communicated respectively with the first controller 230 and second controller 240
Connection, also by switch b realization respectively with 240 communication connection of the first controller 230 and second controller.
The master system upgrade method the following steps are included:
Step S1, physical vlan server 100 is provided, and configures the first virtual machine in the physical vlan server 100
110 and second virtual machine 120；After the operating system and application program encapsulation, packing in engineer station's industrial personal computer 210, conversion
At the first virtual machine file and by its seamless migration to the first virtual machine 110, and run in first virtual machine 110；
After the operating system and application program encapsulation, packing in operator station industrial personal computer 220, it is converted into the second virtual machine file and incites somebody to action
Its seamless migration is run to the second virtual machine 120, and in second virtual machine 120；
In this step, by being carried out to the data in original engineer station's industrial personal computer 210 and operator station industrial personal computer 220
Migration, without buying software and corresponding authorization again.
Step S2, thin-client A corresponding with the second virtual machine 120 is provided, by thin-client A and physical vlan service
100 communication connection of device；Thin-client B corresponding with the first virtual machine 110 is provided, by thin-client B and physical vlan service
100 communication connection of device；
In this step, thin-client can directly access corresponding virtual machine, transfer original system interface with this.
Step S3, it provides and the corresponding external switch A A of the first virtual machine 110 and corresponding with the second virtual machine 120
External switch b B；By the communication connection of switch A and operator station industrial personal computer 220, it is changed to switch A directly and physical vlan
100 communication connection of server；By the communication connection of switch A and engineer station's industrial personal computer 210, be changed to switch A pass through it is external
Switch A A and 100 communication connection of physical vlan server；By the communication connection of switch b and engineer station's industrial personal computer 210, change
At switch b directly with 100 communication connection of physical vlan server；The communication of switch b and operator station industrial personal computer 220 is connected
It connects, is changed to switch b by external switch b B and 100 communication connection of physical vlan server, to constitute virtualization services
Device master system.
In this step, external switch A A and external switch b B is used for field adjustable and maintenance.Meanwhile by that will hand over
It changes planes A and switch b is changed to from two industrial personal computers and connect with physical vlan server 100, to realize the first control of slave computer
The connection of device 230 and second controller 240 and physical vlan server 100 processed.In the present embodiment, thin-client A is with doing exercises
Work person station, thin-client B are used as engineer station, and engineer station and operator station can log in two virtual machines, i.e. physical vlan
The four tunnels communication of server 100 (communicates, and direct or indirect with switch b with the two-way of switch A direct or indirect connection
The two-way of connection communicates) in, need to only keep smooth the way can guarantee host computer interface normal monitoring operation, maximizes realization and matches
Set redundancy.)
Further, physical vlan server 100 uses the virtual management software of model VMware vSphere 6.0
Platform, and using hardware auxiliary virtual platform DELL Power Edge T series.Server hardware uses modularized design side
Method, each main hardware is mutually indepedent, the redundant configurations such as hard disk, CPU, power module, memory.It is each hard when server fault-free
The information that the processing of part equipment is respectively assigned, if one of hardware device breaks down, system automatically needs this hardware device
Data to be processed are transferred in another piece of redundant hardware equipment and are handled, and guarantee to be not in shut down when equipment breaks down
Phenomenon, system restores original operating status automatically after replacing faulty hardware.Change simultaneously and still configures a cold standby behaviour in upgrading scheme
It stands, virtual machine backup file copy to cold standby active station is opened into this active station when server failure is unable to run
Workstation software can directly be run.
Accordingly with master system upgrade method, the invention proposes a kind of virtualized server master system,
Include:
Physical vlan server 100, it is virtual configured with the first virtual machine 110 and second in the physical vlan server 100
Machine 120；Operating system and application program encapsulate, after packing in engineer station's industrial personal computer 210, the first virtual machine file being converted into
Seamless migration is run in the first virtual machine 110, and in first virtual machine 110；System is operated in operator station industrial personal computer 220
System and application program encapsulation, be packaged after, the second virtual machine file seamless migration being converted into the second virtual machine 120, and
It is run in second virtual machine 120；
Thin-client A, it is corresponding with the second virtual machine 120, and with 100 communication connection of physical vlan server；
Thin-client B, it is corresponding with the first virtual machine 110, and with 100 communication connection of physical vlan server；
Switch A also passes through external switch A A and physical vlan directly with 100 communication connection of physical vlan server
100 communication connection of server；
Switch b also passes through external switch b B and physical vlan directly with 100 communication connection of physical vlan server
100 communication connection of server；
Switch A also respectively with 240 communication connection of the first controller 230 and second controller, switch b yet respectively with
240 communication connection of first controller 230 and second controller.
Further, the invention also provides a kind of upgrading sides of virtualized server master system as shown in Figure 2
Method comprising following steps:
Step ST1, a new physical vlan server is provided, by the original physical vlan of virtualized server master system
The first virtual machine 110 and the second virtual machine 120 in server 100 are deployed or are moved on new physical vlan server；
Step ST2, the original physical vlan of new physical vlan server replacement virtualized server master system is taken
Be engaged in device 100 respectively with thin-client A, thin-client B, external switch A A, external switch b B, switch A and switch b
Communication connection.
Compared with traditional upgrade method of master system, virtualized server master system of the invention and related liter
Grade technology has the advantage that
(1) in terms of main hardware buying, since cost is relatively low for thin-client, so virtual server scheme is slightly better than.
In addition, the key property based on virtual server, when number of servers increases in original system, the effect of cost efficiency is more significant；
(2) in terms of main software buying, the buying expenses of former host computer programming software and application software are higher, virtual to take
Business device scheme only needs purchase virtual platform software, at low cost；
(3) in terms of the next end of term in longevity upgrading mode, if still needing to buy physical services again using traditional upgrading scheme
All softwares such as device and operating system, application program, and according to virtualization upgrading scheme, it is only needed in the upgrading in the next end of term in longevity
Replace physical server, can any virtual machine be deployed or be moved to any physical server, reduce fund cost and O&M at
This, has fully demonstrated the advantage of virtualization scheme.
(4) each hardware is independent in terms of subsequent maintenance operation, in virtual server and hot redundancy, occur when a certain hardware therefore
When barrier, system can be automatically switched in redundant hardware and be run, and reduce or eliminate shutdown to the maximum extent, while when a certain hardware goes out
Spare part is only needed to change when existing failure, loses problem without having to worry about soft ware authorization.In addition two thin-clients point in this upgrading scheme
Not Tong Guo external switch-to-server be connected, the later period can repair debugging by interchanger external equipment, and interchanger connects
Mouth is sufficient, is convenient for work on the spot.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (3)
1. a kind of master system upgrade method, master system includes engineer station's industrial personal computer (210) and operator station industry control
Machine (220), engineer station's industrial personal computer (210) respectively with switch A and switch b communication connection, operator station industrial personal computer (220)
Also respectively with switch A and switch b communication connection；Switch A also respectively with the first controller (230) and second controller
(240) communication connection, switch b also respectively with the first controller (230) and second controller (240) communication connection, feature
Be, the master system upgrade method the following steps are included:
Step S1, physical vlan server (100) are provided, and configures the first virtual machine in the physical vlan server (100)
(110) and the second virtual machine (120)；By the operating system and application program encapsulation, packing in engineer station's industrial personal computer (210)
Afterwards, it is converted into the first virtual machine file and by its seamless migration to the first virtual machine (110), and in first virtual machine (110)
In run；After the operating system and application program encapsulation, packing in operator station industrial personal computer (220), it is converted into second
Virtual machine file is simultaneously run its seamless migration to the second virtual machine (120), and in second virtual machine (120)；
Step S2, thin-client A corresponding with the second virtual machine (120) is provided, by thin-client A and physical vlan server
(100) communication connection；Thin-client B corresponding with the first virtual machine (110) is provided, thin-client B and physical vlan are taken
Business device (100) communication connection；
Step S3, it provides and the first virtual machine (110) corresponding external switch A A and corresponding with the second virtual machine (120)
External switch b B；By the communication connection of switch A and operator station industrial personal computer (220), it is changed to switch A directly and virtual object
Manage server (100) communication connection；By the communication connection of switch A and engineer station's industrial personal computer (210), it is logical to be changed to switch A
Cross external switch A A and physical vlan server (100) communication connection；By switch b and engineer station's industrial personal computer (210)
Communication connection, be changed to switch b directly with physical vlan server (100) communication connection；By switch b and operator station industry control
The communication connection of machine (220) is changed to switch b and passes through external switch b B and physical vlan server (100) communication connection.
2. a kind of virtualized server master system characterized by comprising
Physical vlan server (100), configured with the first virtual machine (110) and the second void in the physical vlan server (100)
Quasi- machine (120)；After operating system and application program are encapsulated, are packaged in engineer station's industrial personal computer (210), first be converted into is virtual
Machine file without seam migrates in the first virtual machine (110), and the operation in first virtual machine (110)；Operator station industrial personal computer
(220) after operating system and application program are encapsulated, are packaged in, the second virtual machine file seamless migration being converted into is virtual second
In machine (120), and the operation in second virtual machine (120)；
Thin-client A, it is corresponding with the second virtual machine (120), and with physical vlan server (100) communication connection；
Thin-client B, it is corresponding with the first virtual machine (110), and with physical vlan server (100) communication connection；
Switch A is also taken by external switch A A and physical vlan directly with physical vlan server (100) communication connection
Business device (100) communication connection；
Switch b is also taken by external switch b B and physical vlan directly with physical vlan server (100) communication connection
Business device (100) communication connection；
Switch A also respectively with the first controller (230) and second controller (240) communication connection, switch b yet respectively with
First controller (230) and second controller (240) communication connection.
3. a kind of upgrade method of virtualized server master system as claimed in claim 2, which is characterized in that including with
Lower step:
Step ST1, a new physical vlan server is provided, by the original physical vlan service of virtualized server master system
The first virtual machine (110) and the second virtual machine (120) in device (100) are deployed or are moved on new physical vlan server；
Step ST2, new physical vlan server is replaced into the original physical vlan server of virtualized server master system
(100) come logical with thin-client A, thin-client B, external switch A A, external switch b B, switch A and switch b respectively
News connection.
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| CN111552244A (en) * | 2020-04-23 | 2020-08-18 | 江西瑞林电气自动化有限公司 | Method for solving maintenance problem of DCS (distributed control system) by using virtual technology |
| CN111781882A (en) * | 2020-08-10 | 2020-10-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Virtualization console for wind tunnel test |
| CN113093681A (en) * | 2021-04-08 | 2021-07-09 | 四川远星橡胶有限责任公司 | Control system and method based on super-fusion and server virtualization |
| CN114003006A (en) * | 2021-10-19 | 2022-02-01 | 宝鸡钛业股份有限公司 | Localization method for solving access control system restriction authority by adopting virtualization intelligent algorithm |
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| CN110825057A (en) * | 2019-11-26 | 2020-02-21 | 薛定国 | Method for improving stability and safety of plant-level information monitoring system of power plant |
| CN111552244A (en) * | 2020-04-23 | 2020-08-18 | 江西瑞林电气自动化有限公司 | Method for solving maintenance problem of DCS (distributed control system) by using virtual technology |
| CN111781882A (en) * | 2020-08-10 | 2020-10-16 | 中国空气动力研究与发展中心低速空气动力研究所 | Virtualization console for wind tunnel test |
| CN113093681A (en) * | 2021-04-08 | 2021-07-09 | 四川远星橡胶有限责任公司 | Control system and method based on super-fusion and server virtualization |
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