A novel pressure and vacuum continuous control system, which adopts a hybrid pump as pressure and vacuum source, is presented. The mathematical model of the system is developed. The theoretical simulation and analysis...A novel pressure and vacuum continuous control system, which adopts a hybrid pump as pressure and vacuum source, is presented. The mathematical model of the system is developed. The theoretical simulation and analysis on the system are implemented in order to study the relationships among the characteristics, parameters and working points of the system. The experimental investigations on the system characteristics are presented with the adoption ofa fuzzy-PID controller. The simulation and experimental results indicate that the pressure and vacuum continuous control system based on hybrid pump has good dynamic and static performance, strong robustness and satisfactory adaptability to various system parameters. According to the results, system can successfully gain high accuracy and fast response signal. Also, the mathematical model of system is also testified by the experimental results.展开更多
This paper discusses some crucial problems arising in the implementation of the inelli-gent control of the vacuum distillation,such as the analysis of the plant characteristics,con-trol strategy selection,knowledge re...This paper discusses some crucial problems arising in the implementation of the inelli-gent control of the vacuum distillation,such as the analysis of the plant characteristics,con-trol strategy selection,knowledge representation,specification of maintenance strategy forthe knowledge base and accomplishment of the control system,etc.At the same time,wegive a concrete system along with its results and evaluations.展开更多
The principle and working process of Vacuum Resin Shot Dosing Equipment(VRSDE) are analyzed and the characteristics of IP1612-220PLC (Programmable Logical Controller) areintroduced briefly at first. Then the authors d...The principle and working process of Vacuum Resin Shot Dosing Equipment(VRSDE) are analyzed and the characteristics of IP1612-220PLC (Programmable Logical Controller) areintroduced briefly at first. Then the authors discuss the flow of program, the assignment of PLCI/O ports, the wiring diagram, and the ladder logic program of the PLC control system of VRSDE indetail. Some application issues of the system are accounted for in addition. Finally, according tothe information acquired from users, the authors draw the conclusion: this system owns a highreliability and a-vailability and greatly improves the automatic degree of VRDE.展开更多
Background Vacuum control and interlock system plays an important role in maintaining the vacuum condition for the normal operation of SESRI heavy ion accelerator.Vacuum failure of beam line at any position will cause...Background Vacuum control and interlock system plays an important role in maintaining the vacuum condition for the normal operation of SESRI heavy ion accelerator.Vacuum failure of beam line at any position will cause beam loss,experimental failure,and even serious consequences of accelerator shutdown.Methods This control system is designed and realized based on EPICS structure and PLC controller to realize the control and interlocking function of all kinds of vacuum equipment and ensure the operation and safety of the equipment.PLC level interlock and contact-based hardware interlock methods are used to realize both stability andflexibility.Results After a period of test running and actual operation,it is proved that this vacuum control and interlock system shows good stability,reliability andflexibility.Conclusion The vacuum control and interlock system in this paper realizes the design requirements of vacuum degree display,valve operability,correct and adjustable interlocking for the SESRI heavy ion accelerator vacuum system.展开更多
基金This project is supported by National Natural Science Foundation of China (No.50675075).
文摘A novel pressure and vacuum continuous control system, which adopts a hybrid pump as pressure and vacuum source, is presented. The mathematical model of the system is developed. The theoretical simulation and analysis on the system are implemented in order to study the relationships among the characteristics, parameters and working points of the system. The experimental investigations on the system characteristics are presented with the adoption ofa fuzzy-PID controller. The simulation and experimental results indicate that the pressure and vacuum continuous control system based on hybrid pump has good dynamic and static performance, strong robustness and satisfactory adaptability to various system parameters. According to the results, system can successfully gain high accuracy and fast response signal. Also, the mathematical model of system is also testified by the experimental results.
基金Supported by the High Technology Research and Development Programme of ChinaNational Natural Science Foundation of China and China Petro-chemical Corporation.
文摘This paper discusses some crucial problems arising in the implementation of the inelli-gent control of the vacuum distillation,such as the analysis of the plant characteristics,con-trol strategy selection,knowledge representation,specification of maintenance strategy forthe knowledge base and accomplishment of the control system,etc.At the same time,wegive a concrete system along with its results and evaluations.
文摘The principle and working process of Vacuum Resin Shot Dosing Equipment(VRSDE) are analyzed and the characteristics of IP1612-220PLC (Programmable Logical Controller) areintroduced briefly at first. Then the authors discuss the flow of program, the assignment of PLCI/O ports, the wiring diagram, and the ladder logic program of the PLC control system of VRSDE indetail. Some application issues of the system are accounted for in addition. Finally, according tothe information acquired from users, the authors draw the conclusion: this system owns a highreliability and a-vailability and greatly improves the automatic degree of VRDE.
文摘Background Vacuum control and interlock system plays an important role in maintaining the vacuum condition for the normal operation of SESRI heavy ion accelerator.Vacuum failure of beam line at any position will cause beam loss,experimental failure,and even serious consequences of accelerator shutdown.Methods This control system is designed and realized based on EPICS structure and PLC controller to realize the control and interlocking function of all kinds of vacuum equipment and ensure the operation and safety of the equipment.PLC level interlock and contact-based hardware interlock methods are used to realize both stability andflexibility.Results After a period of test running and actual operation,it is proved that this vacuum control and interlock system shows good stability,reliability andflexibility.Conclusion The vacuum control and interlock system in this paper realizes the design requirements of vacuum degree display,valve operability,correct and adjustable interlocking for the SESRI heavy ion accelerator vacuum system.
