The Experts below are selected from a list of 28212 Experts worldwide ranked by ideXlab platform
Masahiko Itoh - One of the best experts on this subject based on the ideXlab platform.
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AIM - Vibration suppression control of geared mechanical system with Power Circulation structure: Simulation study on effects of sensor-based control
2014 IEEE ASME International Conference on Advanced Intelligent Mechatronics, 2014Co-Authors: Masahiko ItohAbstract:In the field of industrial machines, the mechanical systems composed of the Power Circulation structure exist, and the Powers of two or more motors of the same output are synthesized through the gear stages to drive the driven machine part and the desired motion of the machine is achieved. In this paper, the case that the Power Circulation mechanism is driven by two motors is taken up. First, the analytical model for the torsional vibration and the analytical results are shown. Second, a sensor-based control related to the velocity control loop is proposed. Third, the suppression effects on the residual vibration generated in the driven machine part when motors start and stop by applying the sensor-based control is confirmed by simulations. Simulations show satisfactory control results to reduce the transient vibration at the driven machine part.
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Vibration suppression control of geared mechanical system with Power Circulation structure: Simulation study on effects of model-based control integrated into the position control loop
2013 IEEE International Conference on Mechatronics and Automation, 2013Co-Authors: Masahiko ItohAbstract:In the field of industrial machines, the mechanical systems composed of the Power Circulation structure exist, and the Powers of two or more motors of the same output are synthesized through the gear stages to drive the driven machine part and the desired motion of the machine is achieved. In this paper, the case that the Power Circulation mechanism is driven by two motors is taken up. First, the analytical model for the torsional vibration and the analytical results are shown. Second, a model-based control related to the velocity control loop is proposed. Third, the suppression effects on the residual vibration generated in the driven machine part when motors start and stop by applying the model-based control integrated into the position control loop is confirmed by simulations. Simulations show satisfactory control results to reduce the transient vibration at the driven machine part.
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Vibration Suppression Control of Geared Mechanical System Composed of Power Circulation Structure: Simulation Study on Effects of Model-Based Control
2010 International Conference on Measuring Technology and Mechatronics Automation, 2010Co-Authors: Masahiko ItohAbstract:In the field of industrial machines, the mechanical systems composed of the Power Circulation structure exist, and the Powers of two or more motors of the same output are synthesized through the gear stages to drive the driven machine part and the desired motion of the machine is achieved. In this paper, the case that the Power Circulation mechanism is driven by two motors is taken up. First, the analytical model for the torsional vibration and the analytical result are shown. Second, the suppression effects on the residual vibration generated in the driven machine part when motors start and stop by applying the model-based control concerning the velocity control loop is confirmed by the simulation. Simulations show satisfactory control results to reduce the transient vibration at the driven machine part.
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Simulation study on effects of model-based vibration suppression control applied to a Power Circulation type geared-mechanical system
2010 IEEE International Conference on Mechatronics and Automation, 2010Co-Authors: Masahiko ItohAbstract:In the field of industrial machines, the mechanical systems composed of the Power Circulation structure exist, and the Powers of two or more motors of the same output are synthesized through the gear stages to drive the driven machine part and the desired motion of the machine is achieved. In this paper, the case that the Power Circulation mechanism is driven by two motors is taken up. First, the analytical model for the torsional vibration and the analytical result are shown. Second, the stability of the control system is considered by calculating the loci of system eigenvalues. Third, the suppression effects on the residual vibration generated in the driven machine part when motors start and stop by applying the model-based control concerning the velocity control loop is confirmed by the simulation. Simulations show satisfactory control results to reduce the transient vibration at the driven machine part.
Chengming Zhang - One of the best experts on this subject based on the ideXlab platform.
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Control of Parallel Multiple Converters for Direct-Drive Permanent-Magnet Wind Power Generation Systems
IEEE Transactions on Power Electronics, 2012Co-Authors: Hui Zhu, Chengming ZhangAbstract:This paper proposes control strategies for megawatt-level direct-drive wind generation systems based on permanent magnet synchronous generators. In the paper, a circulating current model is derived and analyzed. The parallel-operation controllers are designed to restrain reactive Power Circulation and beat-frequency Circulation currents caused by discontinuous space-vector modulation. The control schemes do not change the configurations of the system consisting of parallel multiple converters. They are easy to implement for modular designs and large impedance required to equalize the current sharing is not needed. To increase the system reliability, a robust adaptive sliding observer is designed to sense the rotor position of the wind Power generator. The experimental results proved the effectiveness of the control strategies.
Matteo Repetto - One of the best experts on this subject based on the ideXlab platform.
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Electrical-Loss Analysis of Power-Split Hybrid Electric Vehicles
Energies, 2017Co-Authors: Andrea Bonfiglio, Damiano Lanzarotto, Mario Marchesoni, Massimiliano Passalacqua, Renato Procopio, Matteo RepettoAbstract:The growing development of hybrid electric vehicles (HEVs) has seen the spread of architectures with transmission based on planetary gear train, realized thanks to two electric machines. This architecture, by continuously regulating the transmission ratio, allows the internal combustion engine ( ICE ) to work in optimal conditions. On the one hand, the average ICE efficiency is increased thanks to better loading situations, while, on the other hand, electrical losses are introduced due to the Power Circulation between the two electrical machines mentioned above. The aim of this study is then to accurately evaluate electrical losses and the average ICE efficiency in various operating conditions and over different road missions. The models used in this study are presented for both the Continuously Variable Transmission ( CVT ) architecture and the Discontinuously Variable Transmission ( DVT ) architecture. In addition, efficiency maps of the main components are shown. Finally, the simulation results are presented to point out strengths and weaknesses of the CVT architecture.
Tatsuya Takeguchi - One of the best experts on this subject based on the ideXlab platform.
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co2 free electric Power Circulation via direct charge and discharge using the glycolic acid oxalic acid redox couple
Energy and Environmental Science, 2015Co-Authors: Ryota Watanabe, Miho Yamauchi, Masaaki Sadakiyo, Ryu Abe, Tatsuya TakeguchiAbstract:The establishment of an efficient electric Power distribution method is the key to realising a sustainable society driven by renewable-energy-based electricity, such as solar photovoltaics, wind turbine, and wave electricity, in view of supply instability. Here, we demonstrate an electric Power Circulation method that does not emit CO2 and is based on the glycolic acid (GC)/oxalic acid (OX) redox couple. Direct electric Power storage in GC ensures considerably high energy density storage and good transportability through OX electroreduction with significantly high selectivity (>98%) using pure anatase-type titania (TiO2) spheres under mild conditions in the potential region of −0.5 to −0.7 V vs. the RHE at 50 °C. The most desirable characteristic of this electroreduction is the suppression of hydrogen evolution even in acidic aqueous media (Faraday efficiency of 70–95%, pH 2.1). We also successfully generated Power without CO2 emissions via selective electrooxidation of GC with an alkaline fuel cell.
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CO2-free electric Power Circulation via direct charge and discharge using the glycolic acid/oxalic acid redox couple
Energy & Environmental Science, 2015Co-Authors: Ryota Watanabe, Miho Yamauchi, Masaaki Sadakiyo, Ryu Abe, Tatsuya TakeguchiAbstract:The establishment of an efficient electric Power distribution method is the key to realising a sustainable society driven by renewable-energy-based electricity, such as solar photovoltaics, wind turbine, and wave electricity, in view of supply instability. Here, we demonstrate an electric Power Circulation method that does not emit CO2 and is based on the glycolic acid (GC)/oxalic acid (OX) redox couple. Direct electric Power storage in GC ensures considerably high energy density storage and good transportability through OX electroreduction with significantly high selectivity (>98%) using pure anatase-type titania (TiO2) spheres under mild conditions in the potential region of −0.5 to −0.7 V vs. the RHE at 50 °C. The most desirable characteristic of this electroreduction is the suppression of hydrogen evolution even in acidic aqueous media (Faraday efficiency of 70–95%, pH 2.1). We also successfully generated Power without CO2 emissions via selective electrooxidation of GC with an alkaline fuel cell.
Hui Zhu - One of the best experts on this subject based on the ideXlab platform.
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Control of Parallel Multiple Converters for Direct-Drive Permanent-Magnet Wind Power Generation Systems
IEEE Transactions on Power Electronics, 2012Co-Authors: Hui Zhu, Chengming ZhangAbstract:This paper proposes control strategies for megawatt-level direct-drive wind generation systems based on permanent magnet synchronous generators. In the paper, a circulating current model is derived and analyzed. The parallel-operation controllers are designed to restrain reactive Power Circulation and beat-frequency Circulation currents caused by discontinuous space-vector modulation. The control schemes do not change the configurations of the system consisting of parallel multiple converters. They are easy to implement for modular designs and large impedance required to equalize the current sharing is not needed. To increase the system reliability, a robust adaptive sliding observer is designed to sense the rotor position of the wind Power generator. The experimental results proved the effectiveness of the control strategies.
