The Experts below are selected from a list of 2916 Experts worldwide ranked by ideXlab platform
Anke Schmeink - One of the best experts on this subject based on the ideXlab platform.
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optimal resource allocation in ground wireless networks supporting unmanned aerial Vehicle Transmissions
IEEE Transactions on Vehicular Technology, 2020Co-Authors: Guodong Sun, Guohua Zhang, Cenk M Gursoy, Anke SchmeinkAbstract:We consider a fully-loaded ground wireless network supporting unmanned aerial Vehicle (UAV) transmission services. To enable the overload Transmissions to a ground user (GU) and a UAV, two transmission schemes are employed, namely non-orthogonal multiple access (NOMA) and relaying, depending on whether or not the GU and UAV are served simultaneously. Under the assumption of the system operating with infinite blocklength (IBL) codes, the IBL throughputs of both the GU and the UAV are derived under the two schemes. More importantly, we also consider the scenario in which data packets are transmitted via finite blocklength (FBL) codes, i.e., data transmission to both the UAV and the GU is performed under low-latency and high reliability constraints. In this setting, the FBL throughputs are characterized again considering the two schemes of NOMA and relaying. Following the IBL and FBL throughput characterizations, optimal resource allocation designs are subsequently proposed to maximize the UAV throughput while guaranteeing the throughput of the cellular user. Moreover, we prove that the relaying scheme is able to provide transmission service to the UAV while improving the GU's performance, and that the relaying scheme potentially offers a higher throughput to the UAV in the FBL regime than in the IBL regime. On the other hand, the NOMA scheme provides a higher UAV throughput (than relaying) by slightly sacrificing the GU's performance.
Nong Zhang - One of the best experts on this subject based on the ideXlab platform.
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A comparative study energy consumption and costs of battery electric Vehicle Transmissions
Applied Energy, 2016Co-Authors: Jiageng Ruan, Paul D Walker, Nong ZhangAbstract:Despite the long-term benefit of battery electric Vehicles (BEVs) to customers and environment, the initial cost and limited driving range present significant barriers for wide spread commercialization. The integration of multi-speed Transmissions to BEVs’ powertrain systems in place of fixed ratio reduction Transmissions is considered as a feasible method to improve powertrain efficiency and extend limited driving range for a fixed battery size. The aim of this paper is to enable the researchers or BEV manufacturers, especially for transmission systems, to estimate whether their products are worthwhile for the customer in terms of the price/performance relationship of others’ design solutions. To do so a generic battery electric Vehicle is modelled in Matlab/Simulink® to predict motor efficiency and energy consumption for single reduction, two speeds Dual Clutch Transmission (DCT) and simplified Continuous Variable Transmission (CVT) equipped battery electric Vehicles. A credible conclusion is gained, through experimental validation of single speed and two speeds DCT scenarios and reasonable assumptions to support the CVT scenario, that both two speeds DCT and simplified CVT improve the overall powertrain efficiency, save battery energy and reduce customer costs. However, each of the configurations has unique cost and energy consumption related trade-offs.
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A comparative study energy consumption and costs of battery electric Vehicle Transmissions
Applied Energy, 2016Co-Authors: Jiageng Ruan, Paul D Walker, Nong ZhangAbstract:Despite the long-term benefit of battery electric Vehicles (BEVs) to customers and environment, the initial cost and limited driving range present significant barriers for wide spread commercialization. The integration of multi-speed Transmissions to BEVs’ powertrain systems in place of fixed ratio reduction Transmissions is considered as a feasible method to improve powertrain efficiency and extend limited driving range for a fixed battery size. The aim of this paper is to enable the researchers or BEV manufacturers, especially for transmission systems, to estimate whether their products are worthwhile for the customer in terms of the price/performance relationship of others’ design solutions. To do so a generic battery electric Vehicle is modelled in Matlab/Simulink® to predict motor efficiency and energy consumption for single reduction, two speeds Dual Clutch Transmission (DCT) and simplified Continuous Variable Transmission (CVT) equipped battery electric Vehicles. A credible conclusion is gained, through experimental validation of single speed and two speeds DCT scenarios and reasonable assumptions to support the CVT scenario, that both two speeds DCT and simplified CVT improve the overall powertrain efficiency, save battery energy and reduce customer costs. However, each of the configurations has unique cost and energy consumption related trade-offs.
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Simulations of drag torque affecting synchronisers in a dual clutch transmission
Japan Journal of Industrial and Applied Mathematics, 2011Co-Authors: Paul D Walker, Nong Zhang, Ric Tamba, Simon FitzgeraldAbstract:Drag torque contributes significantly to the engagement of synchronisers in Vehicle Transmissions. Little is understood of how drag torque varies during transient engagement. Considerable analysis, however, has shown it affects engagement and can cause the mechanism to fail. To demonstrate the significance of the role that drag torque plays during synchroniser engagement in a wet clutch dual clutch transmission numerical models of the mechanism and drag torque are developed. This includes torsional resistances from bearings, gear windage and friction, viscous shear in the concentrically aligned shafts and the wet clutch pack. Simulations are performed in Matlab^® to evaluate the drag torques acting on the mechanism. The results of simulations using this model demonstrate that the drag torque is dominated by the viscous drag in the wet clutch. Furthermore simulations demonstrate the nonlinear nature of this torque, and the peak drag torque is identified as being significantly larger that typical estimations.
Guodong Sun - One of the best experts on this subject based on the ideXlab platform.
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optimal resource allocation in ground wireless networks supporting unmanned aerial Vehicle Transmissions
IEEE Transactions on Vehicular Technology, 2020Co-Authors: Guodong Sun, Guohua Zhang, Cenk M Gursoy, Anke SchmeinkAbstract:We consider a fully-loaded ground wireless network supporting unmanned aerial Vehicle (UAV) transmission services. To enable the overload Transmissions to a ground user (GU) and a UAV, two transmission schemes are employed, namely non-orthogonal multiple access (NOMA) and relaying, depending on whether or not the GU and UAV are served simultaneously. Under the assumption of the system operating with infinite blocklength (IBL) codes, the IBL throughputs of both the GU and the UAV are derived under the two schemes. More importantly, we also consider the scenario in which data packets are transmitted via finite blocklength (FBL) codes, i.e., data transmission to both the UAV and the GU is performed under low-latency and high reliability constraints. In this setting, the FBL throughputs are characterized again considering the two schemes of NOMA and relaying. Following the IBL and FBL throughput characterizations, optimal resource allocation designs are subsequently proposed to maximize the UAV throughput while guaranteeing the throughput of the cellular user. Moreover, we prove that the relaying scheme is able to provide transmission service to the UAV while improving the GU's performance, and that the relaying scheme potentially offers a higher throughput to the UAV in the FBL regime than in the IBL regime. On the other hand, the NOMA scheme provides a higher UAV throughput (than relaying) by slightly sacrificing the GU's performance.
Paul D Walker - One of the best experts on this subject based on the ideXlab platform.
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A comparative study energy consumption and costs of battery electric Vehicle Transmissions
Applied Energy, 2016Co-Authors: Jiageng Ruan, Paul D Walker, Nong ZhangAbstract:Despite the long-term benefit of battery electric Vehicles (BEVs) to customers and environment, the initial cost and limited driving range present significant barriers for wide spread commercialization. The integration of multi-speed Transmissions to BEVs’ powertrain systems in place of fixed ratio reduction Transmissions is considered as a feasible method to improve powertrain efficiency and extend limited driving range for a fixed battery size. The aim of this paper is to enable the researchers or BEV manufacturers, especially for transmission systems, to estimate whether their products are worthwhile for the customer in terms of the price/performance relationship of others’ design solutions. To do so a generic battery electric Vehicle is modelled in Matlab/Simulink® to predict motor efficiency and energy consumption for single reduction, two speeds Dual Clutch Transmission (DCT) and simplified Continuous Variable Transmission (CVT) equipped battery electric Vehicles. A credible conclusion is gained, through experimental validation of single speed and two speeds DCT scenarios and reasonable assumptions to support the CVT scenario, that both two speeds DCT and simplified CVT improve the overall powertrain efficiency, save battery energy and reduce customer costs. However, each of the configurations has unique cost and energy consumption related trade-offs.
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A comparative study energy consumption and costs of battery electric Vehicle Transmissions
Applied Energy, 2016Co-Authors: Jiageng Ruan, Paul D Walker, Nong ZhangAbstract:Despite the long-term benefit of battery electric Vehicles (BEVs) to customers and environment, the initial cost and limited driving range present significant barriers for wide spread commercialization. The integration of multi-speed Transmissions to BEVs’ powertrain systems in place of fixed ratio reduction Transmissions is considered as a feasible method to improve powertrain efficiency and extend limited driving range for a fixed battery size. The aim of this paper is to enable the researchers or BEV manufacturers, especially for transmission systems, to estimate whether their products are worthwhile for the customer in terms of the price/performance relationship of others’ design solutions. To do so a generic battery electric Vehicle is modelled in Matlab/Simulink® to predict motor efficiency and energy consumption for single reduction, two speeds Dual Clutch Transmission (DCT) and simplified Continuous Variable Transmission (CVT) equipped battery electric Vehicles. A credible conclusion is gained, through experimental validation of single speed and two speeds DCT scenarios and reasonable assumptions to support the CVT scenario, that both two speeds DCT and simplified CVT improve the overall powertrain efficiency, save battery energy and reduce customer costs. However, each of the configurations has unique cost and energy consumption related trade-offs.
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Simulations of drag torque affecting synchronisers in a dual clutch transmission
Japan Journal of Industrial and Applied Mathematics, 2011Co-Authors: Paul D Walker, Nong Zhang, Ric Tamba, Simon FitzgeraldAbstract:Drag torque contributes significantly to the engagement of synchronisers in Vehicle Transmissions. Little is understood of how drag torque varies during transient engagement. Considerable analysis, however, has shown it affects engagement and can cause the mechanism to fail. To demonstrate the significance of the role that drag torque plays during synchroniser engagement in a wet clutch dual clutch transmission numerical models of the mechanism and drag torque are developed. This includes torsional resistances from bearings, gear windage and friction, viscous shear in the concentrically aligned shafts and the wet clutch pack. Simulations are performed in Matlab^® to evaluate the drag torques acting on the mechanism. The results of simulations using this model demonstrate that the drag torque is dominated by the viscous drag in the wet clutch. Furthermore simulations demonstrate the nonlinear nature of this torque, and the peak drag torque is identified as being significantly larger that typical estimations.
Jiageng Ruan - One of the best experts on this subject based on the ideXlab platform.
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A comparative study energy consumption and costs of battery electric Vehicle Transmissions
Applied Energy, 2016Co-Authors: Jiageng Ruan, Paul D Walker, Nong ZhangAbstract:Despite the long-term benefit of battery electric Vehicles (BEVs) to customers and environment, the initial cost and limited driving range present significant barriers for wide spread commercialization. The integration of multi-speed Transmissions to BEVs’ powertrain systems in place of fixed ratio reduction Transmissions is considered as a feasible method to improve powertrain efficiency and extend limited driving range for a fixed battery size. The aim of this paper is to enable the researchers or BEV manufacturers, especially for transmission systems, to estimate whether their products are worthwhile for the customer in terms of the price/performance relationship of others’ design solutions. To do so a generic battery electric Vehicle is modelled in Matlab/Simulink® to predict motor efficiency and energy consumption for single reduction, two speeds Dual Clutch Transmission (DCT) and simplified Continuous Variable Transmission (CVT) equipped battery electric Vehicles. A credible conclusion is gained, through experimental validation of single speed and two speeds DCT scenarios and reasonable assumptions to support the CVT scenario, that both two speeds DCT and simplified CVT improve the overall powertrain efficiency, save battery energy and reduce customer costs. However, each of the configurations has unique cost and energy consumption related trade-offs.
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A comparative study energy consumption and costs of battery electric Vehicle Transmissions
Applied Energy, 2016Co-Authors: Jiageng Ruan, Paul D Walker, Nong ZhangAbstract:Despite the long-term benefit of battery electric Vehicles (BEVs) to customers and environment, the initial cost and limited driving range present significant barriers for wide spread commercialization. The integration of multi-speed Transmissions to BEVs’ powertrain systems in place of fixed ratio reduction Transmissions is considered as a feasible method to improve powertrain efficiency and extend limited driving range for a fixed battery size. The aim of this paper is to enable the researchers or BEV manufacturers, especially for transmission systems, to estimate whether their products are worthwhile for the customer in terms of the price/performance relationship of others’ design solutions. To do so a generic battery electric Vehicle is modelled in Matlab/Simulink® to predict motor efficiency and energy consumption for single reduction, two speeds Dual Clutch Transmission (DCT) and simplified Continuous Variable Transmission (CVT) equipped battery electric Vehicles. A credible conclusion is gained, through experimental validation of single speed and two speeds DCT scenarios and reasonable assumptions to support the CVT scenario, that both two speeds DCT and simplified CVT improve the overall powertrain efficiency, save battery energy and reduce customer costs. However, each of the configurations has unique cost and energy consumption related trade-offs.
