2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011
Resistance spot welding is the key metal joining technique for high volume production in the auto... more Resistance spot welding is the key metal joining technique for high volume production in the automotive, biomedical and electronics industry. Weld quality is one of the dominant issues for the welding community. Thus a major focus of the spot welding research has been to control the process to improve the consistency of the welding process. In order to improve the
Proceedings of the 2005, American Control Conference, 2005.
This study presents a speed control design for switched reluctance motor (SRM) drive powered by a... more This study presents a speed control design for switched reluctance motor (SRM) drive powered by a fuel cell system. The whole control mechanism consists of a hysteresis current controller to minimize the torque ripple and a P-I speed controller. The control design results are then validated in real-time on a two-node RT-Lab T M platform, together with a fuel cell stack model developed in Emmeskay Inc. It is noted that, although the P -I control is designed based on a low-order simplified model, for simulation purpose, the nonlinear inductance model of an 8/6 SRM is used with classic power chopper.
Your file Votre reference ISBN: 0-494-00141-0 Our file Notre reference ISBN: 0-494-00141-0 The au... more Your file Votre reference ISBN: 0-494-00141-0 Our file Notre reference ISBN: 0-494-00141-0 The author has granted a non exclusive license allowing Library and Archives Canada to reproduce, publish, archive, preserve, conserve, communicate to the public by telecommunication or on the Internet, loan, distribute and sell theses worldwide, for commercial or non commercial purposes, in microform, paper, electronic and/or any other formats. L'auteur a accorde une licence non exclusive permettant a la Bibliotheque et Archives Canada de reproduire, publier, archiver, sauvegarder, conserver, transmettre au public par telecommunication ou par I'lnternet, preter, distribuer et vendre des theses partout dans le monde, a des fins commerciales ou autres, sur support microforme, papier, electronique et/ou autres formats. The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. L'auteur conserve la propriete du droit d'auteur et des droits moraux qui protege cette these. Ni la these ni des extraits substantiels de celle-ci ne doivent etre imprimes ou autrement reproduits sans son autorisation.
This paper illustrates an effective real-time software-in-the-loop (SIL) simulation technique for... more This paper illustrates an effective real-time software-in-the-loop (SIL) simulation technique for control design performance validation through two case studies in automotive systems: electric power steering (EPS) control and drive control for a switch reluctance motor (SRM) powered by a fuel cell. This technique, if implemented appropriately, will be able to shorten the prototyping time for control system research and development in both academic and industrial areas. The two cases presented involve complicated dynamics: road/tire steering dynamics and chemical/electrical dynamics in a fuel cell, for which software packages are available to simulate. Therefore, for the purpose of steering and SRM drive control performance validation, successful real-time simulation is desired through interfacing with these software, i.e. making software package in the loop. The case studies presented in this paper demonstrate the effectiveness of this concept. The presented real-time SIL simulation...
2008 Asia Simulation Conference - 7th International Conference on System Simulation and Scientific Computing, 2008
This paper illustrates an effective real time simulation technique for control performance valida... more This paper illustrates an effective real time simulation technique for control performance validation through a case study of electric power steering (EPS) control. The case involves complicated road/tire steering dynamics for which a software package is available to simulate. The study presented in this paper proves the effectiveness of the concept of using successful real time simulation through interfacing with the software package, for the purpose of the steering control performance validation. The presented real-time simulation is conducted on a two-node computer platform engineered by RT-Lab, operating in fixed-step real time. Comparison between real time and off line simulation is also provided.
ABSTRACT In a competitive world, using real-time simulation rather than off-line simulation provi... more ABSTRACT In a competitive world, using real-time simulation rather than off-line simulation provides significant advantage for imitating system dynamics in a real world. Real-time simulation could minimize decision risks for real implementation, shorten design cycle, enhance reliability of research results, and, last but not least, save research and development cost. Moreover, real-time simulation could be also implemented to include real hardware into the loop while is kept as flexible as an off-line numerical simulation. In this paper, a real time simulation mechanism is presented for studying switch reluctance motor (SRM) drive control powered by a fuel cell. The fuel cell stack model is simulated by a software package developed by Emmeskay, Inc., which can be operated in real time. The whole real time simulation is conducted on a two-node platform hosted by RT-Lab, a software product of Opal-RT Technologies, Inc. and engineered by fixed-step real time operating system. In particular, as an illustrating example, an SRM drive control model is first built and then connected with fuel cell stack model. The whole system model is then compiled and operated in real-time on the two-node platform. The real-time simulation result is validated by its off-line simulation counterpart. It is pointed out that this real-time simulation set-up could be easily converted into a hardware-in-the-loop (HIL) simulation carrying real hardware such as microcontroller, real motor, etc., when deemed as necessary. The simulation methodology presented in this paper also indicates a potential low cost approach to support experimentally real-time research and development activities for fuel cell related systems. Considering the high cost to build a real fuel cell system, the set-up described in this paper is extremely meaningful for research and development communities.
In the automobile industry, Resistance Spot Welding (RSW) is widely used for its low cost, high s... more In the automobile industry, Resistance Spot Welding (RSW) is widely used for its low cost, high speed, simple mechanism and applicability for automation. RSW has become the predominant means of auto body assembly, resulting in two to six thousands spot welds performed on each manufactured car. In the North American automobile industry there are approximately 100 billion spot welds, which are done every year. RSW is the joining of two or more metal parts together in a localized area by resistive heating and pressure. Small Scale RSW (SSRSW) is commonly used for medical devices and electronic components, because the welded parts are thinner and smaller compared to common RSW applications, such as automotive applications. According to a study of Edison Welding Institute, 20% of the welding quality issues are the weld schedule or power supply related. Therefore, to contribute to weld quality improvement, the study of different weld schedules or power supplies and control schemes needs to be improved by doing further studies in this area. Thus a novel power supply, which can provide a testing bench for these studies, was designed and developed in 2005 by L. J. Brown and J. Lin. This research study will focus on studying and improving weld power supplies, weld schedules and control modes. One of the goals for this research is to improve the consistency of weld nugget size and strength by using different control parameters, which will be weighted geometric averages of voltage and current. These control parameters are fed back to a Proportional Integral Derivative (PID) controller that is designed to control the Direct Current (DC) power supply for the RSW to come up with the best control parameters that will improve the consistency of the RSW spot welds. Another goal for this research is it to further develop the existing DC power supply that was designed for SSRSW by L. J. Brown, to include tip voltage measurements, and Large Scale Resistance Spot Welding (LSRSW). This goal will lead to build additional weld modules to construct a 6000A welder in the future.
2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011
Resistance spot welding is the key metal joining technique for high volume production in the auto... more Resistance spot welding is the key metal joining technique for high volume production in the automotive, biomedical and electronics industry. Weld quality is one of the dominant issues for the welding community. Thus a major focus of the spot welding research has been to control the process to improve the consistency of the welding process. In order to improve the
Proceedings of the 2005, American Control Conference, 2005.
This study presents a speed control design for switched reluctance motor (SRM) drive powered by a... more This study presents a speed control design for switched reluctance motor (SRM) drive powered by a fuel cell system. The whole control mechanism consists of a hysteresis current controller to minimize the torque ripple and a P-I speed controller. The control design results are then validated in real-time on a two-node RT-Lab T M platform, together with a fuel cell stack model developed in Emmeskay Inc. It is noted that, although the P -I control is designed based on a low-order simplified model, for simulation purpose, the nonlinear inductance model of an 8/6 SRM is used with classic power chopper.
Your file Votre reference ISBN: 0-494-00141-0 Our file Notre reference ISBN: 0-494-00141-0 The au... more Your file Votre reference ISBN: 0-494-00141-0 Our file Notre reference ISBN: 0-494-00141-0 The author has granted a non exclusive license allowing Library and Archives Canada to reproduce, publish, archive, preserve, conserve, communicate to the public by telecommunication or on the Internet, loan, distribute and sell theses worldwide, for commercial or non commercial purposes, in microform, paper, electronic and/or any other formats. L'auteur a accorde une licence non exclusive permettant a la Bibliotheque et Archives Canada de reproduire, publier, archiver, sauvegarder, conserver, transmettre au public par telecommunication ou par I'lnternet, preter, distribuer et vendre des theses partout dans le monde, a des fins commerciales ou autres, sur support microforme, papier, electronique et/ou autres formats. The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. L'auteur conserve la propriete du droit d'auteur et des droits moraux qui protege cette these. Ni la these ni des extraits substantiels de celle-ci ne doivent etre imprimes ou autrement reproduits sans son autorisation.
This paper illustrates an effective real-time software-in-the-loop (SIL) simulation technique for... more This paper illustrates an effective real-time software-in-the-loop (SIL) simulation technique for control design performance validation through two case studies in automotive systems: electric power steering (EPS) control and drive control for a switch reluctance motor (SRM) powered by a fuel cell. This technique, if implemented appropriately, will be able to shorten the prototyping time for control system research and development in both academic and industrial areas. The two cases presented involve complicated dynamics: road/tire steering dynamics and chemical/electrical dynamics in a fuel cell, for which software packages are available to simulate. Therefore, for the purpose of steering and SRM drive control performance validation, successful real-time simulation is desired through interfacing with these software, i.e. making software package in the loop. The case studies presented in this paper demonstrate the effectiveness of this concept. The presented real-time SIL simulation...
2008 Asia Simulation Conference - 7th International Conference on System Simulation and Scientific Computing, 2008
This paper illustrates an effective real time simulation technique for control performance valida... more This paper illustrates an effective real time simulation technique for control performance validation through a case study of electric power steering (EPS) control. The case involves complicated road/tire steering dynamics for which a software package is available to simulate. The study presented in this paper proves the effectiveness of the concept of using successful real time simulation through interfacing with the software package, for the purpose of the steering control performance validation. The presented real-time simulation is conducted on a two-node computer platform engineered by RT-Lab, operating in fixed-step real time. Comparison between real time and off line simulation is also provided.
ABSTRACT In a competitive world, using real-time simulation rather than off-line simulation provi... more ABSTRACT In a competitive world, using real-time simulation rather than off-line simulation provides significant advantage for imitating system dynamics in a real world. Real-time simulation could minimize decision risks for real implementation, shorten design cycle, enhance reliability of research results, and, last but not least, save research and development cost. Moreover, real-time simulation could be also implemented to include real hardware into the loop while is kept as flexible as an off-line numerical simulation. In this paper, a real time simulation mechanism is presented for studying switch reluctance motor (SRM) drive control powered by a fuel cell. The fuel cell stack model is simulated by a software package developed by Emmeskay, Inc., which can be operated in real time. The whole real time simulation is conducted on a two-node platform hosted by RT-Lab, a software product of Opal-RT Technologies, Inc. and engineered by fixed-step real time operating system. In particular, as an illustrating example, an SRM drive control model is first built and then connected with fuel cell stack model. The whole system model is then compiled and operated in real-time on the two-node platform. The real-time simulation result is validated by its off-line simulation counterpart. It is pointed out that this real-time simulation set-up could be easily converted into a hardware-in-the-loop (HIL) simulation carrying real hardware such as microcontroller, real motor, etc., when deemed as necessary. The simulation methodology presented in this paper also indicates a potential low cost approach to support experimentally real-time research and development activities for fuel cell related systems. Considering the high cost to build a real fuel cell system, the set-up described in this paper is extremely meaningful for research and development communities.
In the automobile industry, Resistance Spot Welding (RSW) is widely used for its low cost, high s... more In the automobile industry, Resistance Spot Welding (RSW) is widely used for its low cost, high speed, simple mechanism and applicability for automation. RSW has become the predominant means of auto body assembly, resulting in two to six thousands spot welds performed on each manufactured car. In the North American automobile industry there are approximately 100 billion spot welds, which are done every year. RSW is the joining of two or more metal parts together in a localized area by resistive heating and pressure. Small Scale RSW (SSRSW) is commonly used for medical devices and electronic components, because the welded parts are thinner and smaller compared to common RSW applications, such as automotive applications. According to a study of Edison Welding Institute, 20% of the welding quality issues are the weld schedule or power supply related. Therefore, to contribute to weld quality improvement, the study of different weld schedules or power supplies and control schemes needs to be improved by doing further studies in this area. Thus a novel power supply, which can provide a testing bench for these studies, was designed and developed in 2005 by L. J. Brown and J. Lin. This research study will focus on studying and improving weld power supplies, weld schedules and control modes. One of the goals for this research is to improve the consistency of weld nugget size and strength by using different control parameters, which will be weighted geometric averages of voltage and current. These control parameters are fed back to a Proportional Integral Derivative (PID) controller that is designed to control the Direct Current (DC) power supply for the RSW to come up with the best control parameters that will improve the consistency of the RSW spot welds. Another goal for this research is it to further develop the existing DC power supply that was designed for SSRSW by L. J. Brown, to include tip voltage measurements, and Large Scale Resistance Spot Welding (LSRSW). This goal will lead to build additional weld modules to construct a 6000A welder in the future.
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