The metallurgy department of Kunm-ing Institute of Technology,with its empha-sis on nonferrous metallurgy,is one of themajor academic and technical centres underthe China National Nonferrous Metals In-dustry Corporati...The metallurgy department of Kunm-ing Institute of Technology,with its empha-sis on nonferrous metallurgy,is one of themajor academic and technical centres underthe China National Nonferrous Metals In-dustry Corporation(CNNC).The province of Yunnan,of whichKunming is the capital city,is very rich withresources of nonferrous metals,such as展开更多
Aiming at the characteristics of modularity and reconfigurable in open architecture computer numerical control （CNC） system, the open architecture CNC system, Harbin Institute of Tech- nology computer numerical cont...Aiming at the characteristics of modularity and reconfigurable in open architecture computer numerical control （CNC） system, the open architecture CNC system, Harbin Institute of Tech- nology computer numerical control （HITCNC）, is researched and manufactured based on the interface standards. The system＇s external interfaces are coincident with the corresponding international standards, and the internal interfaces follow the open modular architecture controller （OMAC） agreement. In the research and manufacturing process, object-oriented technology is used to ensure the openness of the HITCNC, and static programming is applied in the CNC system according to the idea of modularization disassembly. The HITCNC also actualizes real-time and unreal-time modules adopting real-time dynamical linked library （RTDLL） and component object model （COM）. Finite state ma- chine （FSM） is adopted to do dynamically modeling of HITCNC. The complete separation between the software and the hardware is achieved in the HITCNC by applying the SoftSERCANS technique. The application of the above key techniques decreases the programming workload greatly, and uses software programs replacing hardware functions, which offers plenty technique ensures for the openness of HITCNC. Finally, based on the HITCNC, a three-dimensional milling system is established. On the system, series experiments are done to validate the expandability and interchangeability of HITCNC. The results of the experiments show that the established open architecture CNC system HITCNC is correct and feasible, and has good openness.展开更多
The President of the Califomia Institute of Technology Professor Jean-Lou Chameau and the Chancellor of the University of California at Santa Barbara Professor Henry Yang both delivered speeches in the Tsinghua Global...The President of the Califomia Institute of Technology Professor Jean-Lou Chameau and the Chancellor of the University of California at Santa Barbara Professor Henry Yang both delivered speeches in the Tsinghua Global Vision Lecture Series during their Tsinghua University visit on August 25, 2009.展开更多
The President of the California Institute of Technology Professor Jean-Lou Chameau and the Chancellor of the University of California at Santa Barbara Professor Henry Yang both delivered speeches in the Tsinghua Globa...The President of the California Institute of Technology Professor Jean-Lou Chameau and the Chancellor of the University of California at Santa Barbara Professor Henry Yang both delivered speeches in the Tsinghua Global Vision Lecture Series during their Tsinghua University visit on August 25, 2009. Tsinghua University President Gu Binglin welcomed Professor Chameau and Professor Yang and outlined for them the latest developments at Tsinghua University. The three university presidents expressed the hope that more cooperation in the future could be built between their universities. They discussed collaboration in research and student exchange during their talks.展开更多
Approximate Dynamic Inversion (ADI) is basically an approximation of exact dynamic inversionor feedback linearisation, which converts a nonlinear system to an equivalent linear structure.This method can be widely appl...Approximate Dynamic Inversion (ADI) is basically an approximation of exact dynamic inversionor feedback linearisation, which converts a nonlinear system to an equivalent linear structure.This method can be widely applied for controlling minimum phase, nonaffine-in-control systems.For applying the ADI method, a fast dynamic subsystem for deriving explicit inversion of thenonaffine equation is required. With full state feedback, ADI may be expressed in the same way asa Proportional Integral (PI) controller with only knowledge of the sign of control effectiveness andalso without any approximation. The Model Reference Adaptive Controller (MRAC) augmentedwith the PI method is an adaptive control technique where the PI parameters are updated/tunedas per the control methodology based on the MRAC-Massachusetts Institute of Technology (MIT)rule so that the plant is capable to follow the reference model. The main objective of this paperis to find the relationship between ADI and MRAC augmented with a PI controller.展开更多
文摘The metallurgy department of Kunm-ing Institute of Technology,with its empha-sis on nonferrous metallurgy,is one of themajor academic and technical centres underthe China National Nonferrous Metals In-dustry Corporation(CNNC).The province of Yunnan,of whichKunming is the capital city,is very rich withresources of nonferrous metals,such as
基金This project is supported by Provincial Science & Technology Projoct of Heilongjiang, China (No. GB05A501).
文摘Aiming at the characteristics of modularity and reconfigurable in open architecture computer numerical control （CNC） system, the open architecture CNC system, Harbin Institute of Tech- nology computer numerical control （HITCNC）, is researched and manufactured based on the interface standards. The system＇s external interfaces are coincident with the corresponding international standards, and the internal interfaces follow the open modular architecture controller （OMAC） agreement. In the research and manufacturing process, object-oriented technology is used to ensure the openness of the HITCNC, and static programming is applied in the CNC system according to the idea of modularization disassembly. The HITCNC also actualizes real-time and unreal-time modules adopting real-time dynamical linked library （RTDLL） and component object model （COM）. Finite state ma- chine （FSM） is adopted to do dynamically modeling of HITCNC. The complete separation between the software and the hardware is achieved in the HITCNC by applying the SoftSERCANS technique. The application of the above key techniques decreases the programming workload greatly, and uses software programs replacing hardware functions, which offers plenty technique ensures for the openness of HITCNC. Finally, based on the HITCNC, a three-dimensional milling system is established. On the system, series experiments are done to validate the expandability and interchangeability of HITCNC. The results of the experiments show that the established open architecture CNC system HITCNC is correct and feasible, and has good openness.
文摘The President of the Califomia Institute of Technology Professor Jean-Lou Chameau and the Chancellor of the University of California at Santa Barbara Professor Henry Yang both delivered speeches in the Tsinghua Global Vision Lecture Series during their Tsinghua University visit on August 25, 2009.
文摘The President of the California Institute of Technology Professor Jean-Lou Chameau and the Chancellor of the University of California at Santa Barbara Professor Henry Yang both delivered speeches in the Tsinghua Global Vision Lecture Series during their Tsinghua University visit on August 25, 2009. Tsinghua University President Gu Binglin welcomed Professor Chameau and Professor Yang and outlined for them the latest developments at Tsinghua University. The three university presidents expressed the hope that more cooperation in the future could be built between their universities. They discussed collaboration in research and student exchange during their talks.
文摘Approximate Dynamic Inversion (ADI) is basically an approximation of exact dynamic inversionor feedback linearisation, which converts a nonlinear system to an equivalent linear structure.This method can be widely applied for controlling minimum phase, nonaffine-in-control systems.For applying the ADI method, a fast dynamic subsystem for deriving explicit inversion of thenonaffine equation is required. With full state feedback, ADI may be expressed in the same way asa Proportional Integral (PI) controller with only knowledge of the sign of control effectiveness andalso without any approximation. The Model Reference Adaptive Controller (MRAC) augmentedwith the PI method is an adaptive control technique where the PI parameters are updated/tunedas per the control methodology based on the MRAC-Massachusetts Institute of Technology (MIT)rule so that the plant is capable to follow the reference model. The main objective of this paperis to find the relationship between ADI and MRAC augmented with a PI controller.
