In software-defined networks(SDNs),controller placement is a critical factor in the design and planning for the future Internet of Things(IoT),telecommunication,and satellite communication systems.Existing research ha...In software-defined networks(SDNs),controller placement is a critical factor in the design and planning for the future Internet of Things(IoT),telecommunication,and satellite communication systems.Existing research has concentrated largely on factors such as reliability,latency,controller capacity,propagation delay,and energy consumption.However,SDNs are vulnerable to distributed denial of service(DDoS)attacks that interfere with legitimate use of the network.The ever-increasing frequency of DDoS attacks has made it necessary to consider them in network design,especially in critical applications such as military,health care,and financial services networks requiring high availability.We propose a mathematical model for planning the deployment of SDN smart backup controllers(SBCs)to preserve service in the presence of DDoS attacks.Given a number of input parameters,our model has two distinct capabilities.First,it determines the optimal number of primary controllers to place at specific locations or nodes under normal operating conditions.Second,it recommends an optimal number of smart backup controllers for use with different levels of DDoS attacks.The goal of the model is to improve resistance to DDoS attacks while optimizing the overall cost based on the parameters.Our simulated results demonstrate that the model is useful in planning for SDN reliability in the presence of DDoS attacks while managing the overall cost.展开更多
A novel method based on mid-frequency vibration is proposed to eliminate coating defects such as bubbles during electroless nickel plating.An automated control system for the plating,enabling precise and stable measur...A novel method based on mid-frequency vibration is proposed to eliminate coating defects such as bubbles during electroless nickel plating.An automated control system for the plating,enabling precise and stable measurements and adjustments of critical parameters such as plating solution temperature,pH,and nickel ion concentration,is also established,which significantly improves process efficiency and coating quality.Experimental results indicate that the system is capable of realizing stable operation over extended periods.A nonporous nickel-phosphorus coating with a thickness greater than 200μm is successfully obtained,with high phosphorus content,robust adhesion,and superior machinability.展开更多
In order to move tracked vehicles at an extremely slowspeed with automated mechanical transmission（ AMT）,slowdriving function was added in the original system. The principle and requirement of slowdriving function w...In order to move tracked vehicles at an extremely slowspeed with automated mechanical transmission（ AMT）,slowdriving function was added in the original system. The principle and requirement of slowdriving function were analyzed. Based on analysis of slow driving characteristic,identification of slowdriving condition and fuzzy control algorithm,a control strategy of the clutch was designed. In order to realize slowdriving,the clutch was controlled in a slipping mode as manual driving. The vehicle speed was increased to a required speed and kept in a small range by engaging or disengaging the clutch to the approximate half engagement point. Based on the control strategy,a control software was designed and tested on a tracked vehicle with AMT. The test results showthat the control of the clutch with the slowdriving function was smoother than that with original systemand the vehicle speed was slower and steadier.展开更多
Rendezvous orbital dynamics and control （RODC） is a key technology for operating space rendezvous and docking missions. This paper surveys the studies on RODC. Firstly, the basic relative dynamics equation set is in...Rendezvous orbital dynamics and control （RODC） is a key technology for operating space rendezvous and docking missions. This paper surveys the studies on RODC. Firstly, the basic relative dynamics equation set is introduced and its improved versions are evaluated. Secondly, studies on rendezvous trajectory optimization are commented from three aspects： the linear rendez- vous, the nonlinear two-body rendezvous, and the perturbed and constrained rendezvous. Thirdly, studies on relative navigation are briefly reviewed, and then close-range control methods including automated control, manual control, and telecontrol are analyzed. Fourthly, advances in rendezvous trajectory safety and robust analysis are surveyed, and their applications in trajectory optimization are discussed. Finally, conclusions are drawn and prospects of studies on RODC are presented.展开更多
The electrification of vehicle helps to improve its operation efficiency and safety.Due to fast development of network,sensors,as well as computing technology,it becomes realizable to have vehicles driving autonomousl...The electrification of vehicle helps to improve its operation efficiency and safety.Due to fast development of network,sensors,as well as computing technology,it becomes realizable to have vehicles driving autonomously.To achieve autonomous driving,several steps,including environment perception,path-planning,and dynamic control,need to be done.However,vehicles equipped with on-board sensors still have limitations in acquiring necessary environmental data for optimal driving decisions.Intelligent and connected vehicles(ICV)cloud control system(CCS)has been introduced as a new concept as it is a potentially synthetic solution for high level automated driving to improve safety and optimize traffic flow in intelligent transportation.This paper systematically investigated the concept of cloud control system from cloud related applications on ICVs,and cloud control system architecture design,as well as its core technologies development.Based on the analysis,the challenges and suggestions on cloud control system development have been addressed.展开更多
Combining with the development of automated manual transmission （AMT）, the various throttle control demands are analyzed under different working conditions of AMT such as tracking acceleration pedal, start, shift an...Combining with the development of automated manual transmission （AMT）, the various throttle control demands are analyzed under different working conditions of AMT such as tracking acceleration pedal, start, shift and so on. Based on simulation, the responding throttle control strategies are proposed, and a simple but effective throttle control method is presented. The testing results have proved that the strategies are effective for improving the pedal tracking precision and the qualities of start and shift.展开更多
Today the high quality power supply is of essential in the economic development in a country. With the development of modem power systems and increasing demand for power supply, the electric power industry is facing a...Today the high quality power supply is of essential in the economic development in a country. With the development of modem power systems and increasing demand for power supply, the electric power industry is facing a great challenge in meeting the increased load demand with highest reliability and security with minimum transmission expenditure. Power system stability analysis and control is one of the most important issues in power systems. The problem becomes more and more serious in power systems with the development of modem power systems. The ability of a power system展开更多
The 6th Intemational Conference on Control and Automation(ICCA'07)will be held on May 30 to June 1,2007,in Guangzhou,China.The conference is jointly organized by the IEEE Control Systems Chapter,Singapore and IEEE...The 6th Intemational Conference on Control and Automation(ICCA'07)will be held on May 30 to June 1,2007,in Guangzhou,China.The conference is jointly organized by the IEEE Control Systems Chapter,Singapore and IEEE Control Systems Chapter,Guangzhou,China,and spon- sored by South China University of Technology,China and Chinese University of Hong Kong, Hong Kong.It is to create a forum for scientists and practicing engineers throughout the world to present the latest research findings and ideas in the areas of control and automation.展开更多
As science and technology continue to progress forward,electrical automation engineering is also developing,of which programmable logic controller(PLC)technology is widely being used.Through the integration of PLC tec...As science and technology continue to progress forward,electrical automation engineering is also developing,of which programmable logic controller(PLC)technology is widely being used.Through the integration of PLC technology and traditional electrical automation technology,good development of modern science and technology is promoted while traditional automation is preserved.The development of electrical engineering can greatly improve the strength of science,technology,and economy in our country.Based on PLC technology,this paper analyzes the design of electrical automation control.展开更多
Computer based automation and control systems are becoming increasingly important in smart sustainable buildings,often referred to as automated buildings(ABs),in order to automatically control,optimize and supervise a...Computer based automation and control systems are becoming increasingly important in smart sustainable buildings,often referred to as automated buildings(ABs),in order to automatically control,optimize and supervise a wide range of building performance applications over a network while minimizing energy consumption and associated green house gas emission.This technology generally refers to building automation and control systems(BACS)architecture.Instead of costly and time-consuming experiments,this paper focuses on development and design of a distributed dynamic simulation environment with the capability to represent BACS architecture in simulation by run-time coupling two or more different software tools over a network.This involves using distributed dynamic simulations as means to analyze the performance and enhance networked real-time control systems in ABs and improve the functions of real BACS technology.The application and capability of this new dynamic simulation environment are demonstrated by an experimental design,in this paper.展开更多
In this paper, we conduct research on the automation control information system model based on the Chaos and nonlineartransformation. Electronic control automation system in the process of social and economic developm...In this paper, we conduct research on the automation control information system model based on the Chaos and nonlineartransformation. Electronic control automation system in the process of social and economic development plays the key role is obvious, it caneffectively encourage industry automation level is improved greatly, at the same time, electronic automation system control to the larger extenton saving the cost of enterprise. Electronic systems control automation industrial enterprises should also improve their in technical innovationability, to have independent intellectual property rights of electronic automation engineering control system. This paper combines the Chaos andnonlinear transformation principles to optimize the traditional system that is meaningful.展开更多
This paper proposes the application strategy of the intelligent technology in electronic engineering automation control. Artificial intelligence technology is about to realize the calculation of perception, reasoning ...This paper proposes the application strategy of the intelligent technology in electronic engineering automation control. Artificial intelligence technology is about to realize the calculation of perception, reasoning and behavior study of it is different from most of the psychology, because it is more of an emphasis on the calculation, the artificial intelligence is also different from most of the computer science as because it is more of an emphasis on the perception, reasoning, and behavior, and future applications of artificial intelligence is beyond imagination. Regarding the multi-agent system target identification data fusion, the goal type is a proposition, each intelligent body gives through processing regarding the goal type judgment result is evidence, we discussed in detail of the essential applications on the item that will promote the further development.展开更多
With the acceleration of China's modernization, infrastructure construction is affecting the development of China's national economy. China's construction of water conservancy projects continues to increas...With the acceleration of China's modernization, infrastructure construction is affecting the development of China's national economy. China's construction of water conservancy projects continues to increase, which ushered in an opportunity for water conservancy construction. As the construction of water conservancy projects has certain complexity and systematic characteristics, the process is complicated, and the construction involves various aspects, which also means that failure problems will inevitably occur during the operation of water conservancy projects, especially the failure of automation systems is the most common, which will have a serious impact on the operation efficiency, ability and level of water conservancy projects. Therefore, corresponding troubleshooting measures must be taken, and regular and regular inspection and investigation should be carried out. Through the established algorithm and so on, the hydraulic engineering automation control system fault is eliminated, the initial fault signal of the automation control system is mined, the fault type of the automation system is effectively identified, and based on the mastery of the fault cause, a targeted fault elimination instruction is adopted. Based on this, the analysis is carried out around the automation system of water conservancy projects, and the troubleshooting strategies of the system are explored to maintain the safe operation of the whole water conservancy project, improve the application effect of the automation control system, promote the continuity of the operation of the automation control system, provide references and suggestions for the troubleshooting of the automation control of water conservancy projects, and optimize the troubleshooting methods so as to effectively eliminate the faults.展开更多
After the application of PLC in the field of electrical automation of mechanical equipment, its function has been greatly developed, which greatly promotes the development of electrical engineering and its automation ...After the application of PLC in the field of electrical automation of mechanical equipment, its function has been greatly developed, which greatly promotes the development of electrical engineering and its automation control field. It is an application with promoting significance. The automatic control system of mechanical and electrical equipment based on Siemens PLC technology can not only maintain the level of mechanical automation, optimize its comprehensive application efficiency, construct a complete automation application process, achieve the goal of automation application, but also upgrade and transform the technology, so as to lay a solid foundation for the progress of mechanical automation level.展开更多
This paper mainly analyzes industrial simulation technology and its development, and briefly analyzes the teaching status of automation control major, which mainly shows that students lack initiative in learning, abst...This paper mainly analyzes industrial simulation technology and its development, and briefly analyzes the teaching status of automation control major, which mainly shows that students lack initiative in learning, abstract concept knowledge and intuitive teaching content. At the same time, the importance of industrial simulation technology applied in automation control major is expounded, which proves that simulation technology can improve classroom atmosphere, provide intuitive teaching content for students and enhance students learning interest. Based on this, the author makes the following reflections on the application of industrial simulation technology in the teaching of automation control specialty.展开更多
The rapid development of The Times, now all walks of life have taken on a new look, China's market economy is more stable step forward. At the end of the last century, the industrial reform ushered in the qualitat...The rapid development of The Times, now all walks of life have taken on a new look, China's market economy is more stable step forward. At the end of the last century, the industrial reform ushered in the qualitative changes, and the traditional industry was impacted by the technological renewal, and began to integrate with the international standards. In the late 1980s, various integrated circuits entered the market on a large scale, and microelectronics technology developed rapidly. Among them, the PLC composed of 16-and 32-bit microprocessors has surprisingly development. Up to now, China has independently developed an independent PLC processing technology, which has made significant contributions to industrial development.展开更多
Chemical production has the characteristics of complexity, great difficulty, accurate technical requirements and high risk. The application of intelligent control technology and instrument control to chemical producti...Chemical production has the characteristics of complexity, great difficulty, accurate technical requirements and high risk. The application of intelligent control technology and instrument control to chemical production can reduce the demand for manual operation, improve the accuracy of chemical production and promote the benign operation of chemical operation. Therefore, the key technologies of intelligent control and instrument control should be deeply analyzed. In order to seek better chemical production technology and control scheme and promote the development of chemical industry.展开更多
To address the current issues with the conventional slide gate system utilized in the steel teeming process,a unique electromagnetic induction controlled automated steel teeming(EICAST)technology has been developed.Co...To address the current issues with the conventional slide gate system utilized in the steel teeming process,a unique electromagnetic induction controlled automated steel teeming(EICAST)technology has been developed.Cooling means of spiral coil in this technology is directly related to its service life.Firstly,heat transfer processes of air cooling and spray cooling were compared and analyzed.Secondly,the impacts of water temperature,water flow rate and air flow rate were examined in order to maximize the spray cooling effect.To maintain coil temperature at a low value consistently throughout the entire thermal cycle process of the ladle,a combined cooling mode was finally employed.Numerical simulation was applied to examine the coil temperature variation with different cooling systems and characteristics.Before coil operation,spray cooling is said to be more effective.By controlling the water flow rate and air flow rate,the spray cooling effect is enhanced.However,water temperature has little or no impact when using spray cooling.Air cooling during the secondary refining process and spray cooling prior to coil operation are combined to further lower coil temperature.When the direction of the spray cooling is from bottom to top,the coil temperature is lowered below 165℃.A practical induction coil cooling plan was provided for the EICAST technology’s production process.展开更多
基金This research work was funded by TMR&D Sdn Bhd under project code RDTC160902.
文摘In software-defined networks(SDNs),controller placement is a critical factor in the design and planning for the future Internet of Things(IoT),telecommunication,and satellite communication systems.Existing research has concentrated largely on factors such as reliability,latency,controller capacity,propagation delay,and energy consumption.However,SDNs are vulnerable to distributed denial of service(DDoS)attacks that interfere with legitimate use of the network.The ever-increasing frequency of DDoS attacks has made it necessary to consider them in network design,especially in critical applications such as military,health care,and financial services networks requiring high availability.We propose a mathematical model for planning the deployment of SDN smart backup controllers(SBCs)to preserve service in the presence of DDoS attacks.Given a number of input parameters,our model has two distinct capabilities.First,it determines the optimal number of primary controllers to place at specific locations or nodes under normal operating conditions.Second,it recommends an optimal number of smart backup controllers for use with different levels of DDoS attacks.The goal of the model is to improve resistance to DDoS attacks while optimizing the overall cost based on the parameters.Our simulated results demonstrate that the model is useful in planning for SDN reliability in the presence of DDoS attacks while managing the overall cost.
基金supported by the National Key Research and Development Program of China(Grant No.2023YFB3407200)the National Natural Science Foundation of China(Grant Nos.52375462 and 52035009).
文摘A novel method based on mid-frequency vibration is proposed to eliminate coating defects such as bubbles during electroless nickel plating.An automated control system for the plating,enabling precise and stable measurements and adjustments of critical parameters such as plating solution temperature,pH,and nickel ion concentration,is also established,which significantly improves process efficiency and coating quality.Experimental results indicate that the system is capable of realizing stable operation over extended periods.A nonporous nickel-phosphorus coating with a thickness greater than 200μm is successfully obtained,with high phosphorus content,robust adhesion,and superior machinability.
基金Supported by the National Natural Science Foundation of China(51375053)
文摘In order to move tracked vehicles at an extremely slowspeed with automated mechanical transmission（ AMT）,slowdriving function was added in the original system. The principle and requirement of slowdriving function were analyzed. Based on analysis of slow driving characteristic,identification of slowdriving condition and fuzzy control algorithm,a control strategy of the clutch was designed. In order to realize slowdriving,the clutch was controlled in a slipping mode as manual driving. The vehicle speed was increased to a required speed and kept in a small range by engaging or disengaging the clutch to the approximate half engagement point. Based on the control strategy,a control software was designed and tested on a tracked vehicle with AMT. The test results showthat the control of the clutch with the slowdriving function was smoother than that with original systemand the vehicle speed was slower and steadier.
基金co-supported by the National Natural Science Foundation of China (Nos.10902121 and 11222215)National Basic Research Program of China (No.2013CB733100)the Foundation for the Author of National Excellent Doctoral Dissertation of China (No.201171)
文摘Rendezvous orbital dynamics and control （RODC） is a key technology for operating space rendezvous and docking missions. This paper surveys the studies on RODC. Firstly, the basic relative dynamics equation set is introduced and its improved versions are evaluated. Secondly, studies on rendezvous trajectory optimization are commented from three aspects： the linear rendez- vous, the nonlinear two-body rendezvous, and the perturbed and constrained rendezvous. Thirdly, studies on relative navigation are briefly reviewed, and then close-range control methods including automated control, manual control, and telecontrol are analyzed. Fourthly, advances in rendezvous trajectory safety and robust analysis are surveyed, and their applications in trajectory optimization are discussed. Finally, conclusions are drawn and prospects of studies on RODC are presented.
基金Supported by Beijing Nova Program of Science and Technology(Grant No.Z191100001119087)Beijing Municipal Science&Technology Commission(Grant No.Z181100004618005 and Grant No.Z18111000460000)。
文摘The electrification of vehicle helps to improve its operation efficiency and safety.Due to fast development of network,sensors,as well as computing technology,it becomes realizable to have vehicles driving autonomously.To achieve autonomous driving,several steps,including environment perception,path-planning,and dynamic control,need to be done.However,vehicles equipped with on-board sensors still have limitations in acquiring necessary environmental data for optimal driving decisions.Intelligent and connected vehicles(ICV)cloud control system(CCS)has been introduced as a new concept as it is a potentially synthetic solution for high level automated driving to improve safety and optimize traffic flow in intelligent transportation.This paper systematically investigated the concept of cloud control system from cloud related applications on ICVs,and cloud control system architecture design,as well as its core technologies development.Based on the analysis,the challenges and suggestions on cloud control system development have been addressed.
基金This project is supported by Provincial Open Foundation of Key Lab forAutomobile of Jiangsu, China (No.KJS02076) and 985 Project of AutomotiveEngineering Innovation Platform of Jilin University, China.
文摘Combining with the development of automated manual transmission （AMT）, the various throttle control demands are analyzed under different working conditions of AMT such as tracking acceleration pedal, start, shift and so on. Based on simulation, the responding throttle control strategies are proposed, and a simple but effective throttle control method is presented. The testing results have proved that the strategies are effective for improving the pedal tracking precision and the qualities of start and shift.
文摘Today the high quality power supply is of essential in the economic development in a country. With the development of modem power systems and increasing demand for power supply, the electric power industry is facing a great challenge in meeting the increased load demand with highest reliability and security with minimum transmission expenditure. Power system stability analysis and control is one of the most important issues in power systems. The problem becomes more and more serious in power systems with the development of modem power systems. The ability of a power system
文摘The 6th Intemational Conference on Control and Automation(ICCA'07)will be held on May 30 to June 1,2007,in Guangzhou,China.The conference is jointly organized by the IEEE Control Systems Chapter,Singapore and IEEE Control Systems Chapter,Guangzhou,China,and spon- sored by South China University of Technology,China and Chinese University of Hong Kong, Hong Kong.It is to create a forum for scientists and practicing engineers throughout the world to present the latest research findings and ideas in the areas of control and automation.
基金2021 Guangxi Electrical Polytechnic Institute Scientific Research Capability Enhancement Project:Research and development based on Siemens 1200 Visual Material Sorting device(Project No.2021KY03)。
文摘As science and technology continue to progress forward,electrical automation engineering is also developing,of which programmable logic controller(PLC)technology is widely being used.Through the integration of PLC technology and traditional electrical automation technology,good development of modern science and technology is promoted while traditional automation is preserved.The development of electrical engineering can greatly improve the strength of science,technology,and economy in our country.Based on PLC technology,this paper analyzes the design of electrical automation control.
文摘Computer based automation and control systems are becoming increasingly important in smart sustainable buildings,often referred to as automated buildings(ABs),in order to automatically control,optimize and supervise a wide range of building performance applications over a network while minimizing energy consumption and associated green house gas emission.This technology generally refers to building automation and control systems(BACS)architecture.Instead of costly and time-consuming experiments,this paper focuses on development and design of a distributed dynamic simulation environment with the capability to represent BACS architecture in simulation by run-time coupling two or more different software tools over a network.This involves using distributed dynamic simulations as means to analyze the performance and enhance networked real-time control systems in ABs and improve the functions of real BACS technology.The application and capability of this new dynamic simulation environment are demonstrated by an experimental design,in this paper.
文摘In this paper, we conduct research on the automation control information system model based on the Chaos and nonlineartransformation. Electronic control automation system in the process of social and economic development plays the key role is obvious, it caneffectively encourage industry automation level is improved greatly, at the same time, electronic automation system control to the larger extenton saving the cost of enterprise. Electronic systems control automation industrial enterprises should also improve their in technical innovationability, to have independent intellectual property rights of electronic automation engineering control system. This paper combines the Chaos andnonlinear transformation principles to optimize the traditional system that is meaningful.
文摘This paper proposes the application strategy of the intelligent technology in electronic engineering automation control. Artificial intelligence technology is about to realize the calculation of perception, reasoning and behavior study of it is different from most of the psychology, because it is more of an emphasis on the calculation, the artificial intelligence is also different from most of the computer science as because it is more of an emphasis on the perception, reasoning, and behavior, and future applications of artificial intelligence is beyond imagination. Regarding the multi-agent system target identification data fusion, the goal type is a proposition, each intelligent body gives through processing regarding the goal type judgment result is evidence, we discussed in detail of the essential applications on the item that will promote the further development.
文摘With the acceleration of China's modernization, infrastructure construction is affecting the development of China's national economy. China's construction of water conservancy projects continues to increase, which ushered in an opportunity for water conservancy construction. As the construction of water conservancy projects has certain complexity and systematic characteristics, the process is complicated, and the construction involves various aspects, which also means that failure problems will inevitably occur during the operation of water conservancy projects, especially the failure of automation systems is the most common, which will have a serious impact on the operation efficiency, ability and level of water conservancy projects. Therefore, corresponding troubleshooting measures must be taken, and regular and regular inspection and investigation should be carried out. Through the established algorithm and so on, the hydraulic engineering automation control system fault is eliminated, the initial fault signal of the automation control system is mined, the fault type of the automation system is effectively identified, and based on the mastery of the fault cause, a targeted fault elimination instruction is adopted. Based on this, the analysis is carried out around the automation system of water conservancy projects, and the troubleshooting strategies of the system are explored to maintain the safe operation of the whole water conservancy project, improve the application effect of the automation control system, promote the continuity of the operation of the automation control system, provide references and suggestions for the troubleshooting of the automation control of water conservancy projects, and optimize the troubleshooting methods so as to effectively eliminate the faults.
文摘After the application of PLC in the field of electrical automation of mechanical equipment, its function has been greatly developed, which greatly promotes the development of electrical engineering and its automation control field. It is an application with promoting significance. The automatic control system of mechanical and electrical equipment based on Siemens PLC technology can not only maintain the level of mechanical automation, optimize its comprehensive application efficiency, construct a complete automation application process, achieve the goal of automation application, but also upgrade and transform the technology, so as to lay a solid foundation for the progress of mechanical automation level.
文摘This paper mainly analyzes industrial simulation technology and its development, and briefly analyzes the teaching status of automation control major, which mainly shows that students lack initiative in learning, abstract concept knowledge and intuitive teaching content. At the same time, the importance of industrial simulation technology applied in automation control major is expounded, which proves that simulation technology can improve classroom atmosphere, provide intuitive teaching content for students and enhance students learning interest. Based on this, the author makes the following reflections on the application of industrial simulation technology in the teaching of automation control specialty.
文摘The rapid development of The Times, now all walks of life have taken on a new look, China's market economy is more stable step forward. At the end of the last century, the industrial reform ushered in the qualitative changes, and the traditional industry was impacted by the technological renewal, and began to integrate with the international standards. In the late 1980s, various integrated circuits entered the market on a large scale, and microelectronics technology developed rapidly. Among them, the PLC composed of 16-and 32-bit microprocessors has surprisingly development. Up to now, China has independently developed an independent PLC processing technology, which has made significant contributions to industrial development.
文摘Chemical production has the characteristics of complexity, great difficulty, accurate technical requirements and high risk. The application of intelligent control technology and instrument control to chemical production can reduce the demand for manual operation, improve the accuracy of chemical production and promote the benign operation of chemical operation. Therefore, the key technologies of intelligent control and instrument control should be deeply analyzed. In order to seek better chemical production technology and control scheme and promote the development of chemical industry.
基金supported by the Startup Foundation of Shenyang Agriculture University(No.X2023050)the Fundamental Research Funds for the Central Universities(No.N2209006)the National Natural Science Foundation of China(No.U22A20173).
文摘To address the current issues with the conventional slide gate system utilized in the steel teeming process,a unique electromagnetic induction controlled automated steel teeming(EICAST)technology has been developed.Cooling means of spiral coil in this technology is directly related to its service life.Firstly,heat transfer processes of air cooling and spray cooling were compared and analyzed.Secondly,the impacts of water temperature,water flow rate and air flow rate were examined in order to maximize the spray cooling effect.To maintain coil temperature at a low value consistently throughout the entire thermal cycle process of the ladle,a combined cooling mode was finally employed.Numerical simulation was applied to examine the coil temperature variation with different cooling systems and characteristics.Before coil operation,spray cooling is said to be more effective.By controlling the water flow rate and air flow rate,the spray cooling effect is enhanced.However,water temperature has little or no impact when using spray cooling.Air cooling during the secondary refining process and spray cooling prior to coil operation are combined to further lower coil temperature.When the direction of the spray cooling is from bottom to top,the coil temperature is lowered below 165℃.A practical induction coil cooling plan was provided for the EICAST technology’s production process.
