The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
T. Sakamoto - One of the best experts on this subject based on the ideXlab platform.
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ASCC - Implementation and validation of a Lumped Model for an experimental multi-span web transport system
2017 11th Asian Control Conference (ASCC), 2017Co-Authors: N.i. Giannoccaro, G. Manieri, P. Martina, T. SakamotoAbstract:Correct Modeling is necessary in order to design a better control system or to identify the plant parameters experimentally. On the web dynamics itself, Lumped parameters expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity of incorporating the property of viscoelasticity to the web. Lumped Model of an experimental multi-span web transport system is based on the conservation mass, torque balance and viscoelasticity. A new way for describing this kind of MIMO system has been introduced through a four by four Transfer Matrix which considers mutual interactions between inputs and outputs. Finally, comparing experimental data with Transfer Matrix parametric expressions, it has been possible to identify the system parameters and thus fully validate the effectiveness of the proposed dynamic Lumped Model.
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Implementation and validation of a Lumped Model for an experimental multi-span web transport system
2017 11th Asian Control Conference (ASCC), 2017Co-Authors: N.i. Giannoccaro, G. Manieri, P. Martina, T. SakamotoAbstract:Correct Modeling is necessary in order to design a better control system or to identify the plant parameters experimentally. On the web dynamics itself, Lumped parameters expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity of incorporating the property of viscoelasticity to the web. Lumped Model of an experimental multi-span web transport system is based on the conservation mass, torque balance and viscoelasticity. A new way for describing this kind of MIMO system has been introduced through a four by four Transfer Matrix which considers mutual interactions between inputs and outputs. Finally, comparing experimental data with Transfer Matrix parametric expressions, it has been possible to identify the system parameters and thus fully validate the effectiveness of the proposed dynamic Lumped Model.
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updating of a Lumped Model for an experimental web tension control system using a multivariable optimization method
Applied Mathematical Modelling, 2010Co-Authors: N.i. Giannoccaro, Arcangelo Messina, T. SakamotoAbstract:Abstract The Modelling and the control of web handling systems have been studied for a long time; correct Modelling is necessary in order to design a better control system or to identify the plant parameters experimentally. On the web dynamics itself, Lumped parameters expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity of incorporating the property of viscoelasticity to the web. In this paper the Lumped Model of a new web tension experimental system is updated; the Model is based on the conservation mass, torque balance and viscoelasticity (Voigt approach). The experimental system consists of four sections each of which is driven by a servomotor; the speed and tension feedback, by using encoders and tension sensors, drives simultaneously the four servomotors through a real time C programmed D/A board. Usually, as described in the literature, these kinds of Models are developed in the Laplace domain and the block scheme gives a graphical interpretation of the interaction between different sections. The transformation of the block scheme in a differential equation system in the time domain is fully described in this paper; it is not a simple step and it requires the introduction of not null initial condition for the derivative of physical variables. Moreover, the problem of validation has been dealt with in detail in this paper, considering simultaneously 2 different combinations of input data in open loop and a multivariable optimization method in order to estimate a certain number of unknown parameters. The results will show the accuracy of this kind of Lumped parameters Model for the complex experimental systems and useful information for successively designing an efficient control strategy.
N.i. Giannoccaro - One of the best experts on this subject based on the ideXlab platform.
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ASCC - Implementation and validation of a Lumped Model for an experimental multi-span web transport system
2017 11th Asian Control Conference (ASCC), 2017Co-Authors: N.i. Giannoccaro, G. Manieri, P. Martina, T. SakamotoAbstract:Correct Modeling is necessary in order to design a better control system or to identify the plant parameters experimentally. On the web dynamics itself, Lumped parameters expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity of incorporating the property of viscoelasticity to the web. Lumped Model of an experimental multi-span web transport system is based on the conservation mass, torque balance and viscoelasticity. A new way for describing this kind of MIMO system has been introduced through a four by four Transfer Matrix which considers mutual interactions between inputs and outputs. Finally, comparing experimental data with Transfer Matrix parametric expressions, it has been possible to identify the system parameters and thus fully validate the effectiveness of the proposed dynamic Lumped Model.
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Implementation and validation of a Lumped Model for an experimental multi-span web transport system
2017 11th Asian Control Conference (ASCC), 2017Co-Authors: N.i. Giannoccaro, G. Manieri, P. Martina, T. SakamotoAbstract:Correct Modeling is necessary in order to design a better control system or to identify the plant parameters experimentally. On the web dynamics itself, Lumped parameters expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity of incorporating the property of viscoelasticity to the web. Lumped Model of an experimental multi-span web transport system is based on the conservation mass, torque balance and viscoelasticity. A new way for describing this kind of MIMO system has been introduced through a four by four Transfer Matrix which considers mutual interactions between inputs and outputs. Finally, comparing experimental data with Transfer Matrix parametric expressions, it has been possible to identify the system parameters and thus fully validate the effectiveness of the proposed dynamic Lumped Model.
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updating of a Lumped Model for an experimental web tension control system using a multivariable optimization method
Applied Mathematical Modelling, 2010Co-Authors: N.i. Giannoccaro, Arcangelo Messina, T. SakamotoAbstract:Abstract The Modelling and the control of web handling systems have been studied for a long time; correct Modelling is necessary in order to design a better control system or to identify the plant parameters experimentally. On the web dynamics itself, Lumped parameters expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity of incorporating the property of viscoelasticity to the web. In this paper the Lumped Model of a new web tension experimental system is updated; the Model is based on the conservation mass, torque balance and viscoelasticity (Voigt approach). The experimental system consists of four sections each of which is driven by a servomotor; the speed and tension feedback, by using encoders and tension sensors, drives simultaneously the four servomotors through a real time C programmed D/A board. Usually, as described in the literature, these kinds of Models are developed in the Laplace domain and the block scheme gives a graphical interpretation of the interaction between different sections. The transformation of the block scheme in a differential equation system in the time domain is fully described in this paper; it is not a simple step and it requires the introduction of not null initial condition for the derivative of physical variables. Moreover, the problem of validation has been dealt with in detail in this paper, considering simultaneously 2 different combinations of input data in open loop and a multivariable optimization method in order to estimate a certain number of unknown parameters. The results will show the accuracy of this kind of Lumped parameters Model for the complex experimental systems and useful information for successively designing an efficient control strategy.
R. Rengaswemy - One of the best experts on this subject based on the ideXlab platform.
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Solid Oxide Fuel Cell Modeling
IEEE Transactions on Industrial Electronics, 2009Co-Authors: Abraham Gebregergis, Pundy Pillay, D Bhattacharyya, R. RengaswemyAbstract:This paper discusses the Modeling of a solid oxide fuel cell using both Lumped and distributed Modeling approaches. In particular, the focus of this paper is on the development of a computationally efficient Lumped-parameter Model for real-time emulation and control. The performance of this Model is compared with a detailed distributed Model and experimental results. The fundamental relations that govern a fuel cell operation are utilized in both approaches. However, the partial pressure of the species (fuel, air, and water) in the distributed Model is assumed to vary through the length of the fuel cell. The Lumped Model approach uses the partial pressure of the species at the exit point of the fuel cell. The partial pressure of the species is represented by an equivalent RC circuit in the Lumped Model.
Kai Sundmacher - One of the best experts on this subject based on the ideXlab platform.
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Theoretical investigation of steady state multiplicities in solid oxide fuel cells^*
Journal of Applied Electrochemistry, 2006Co-Authors: Michael Mangold, Mykhaylo Krasnyk, Kai SundmacherAbstract:The nonlinear steady state behaviour of solid oxide fuel cells (SOFCs) is investigated. It is found that the temperature dependence of the electrolyte conductivity has a very strong influence on the occurrence of multiple steady states, instabilities and the formation of hot spots. Two correlations from the literature for the electrolyte conductivity are studied in a Lumped Model and in a 1D spatially distributed Model of a SOFC. The cases of galvanostatic operation, potentiostatic operation, and operation under a constant ohmic load are considered. The Lumped Model possesses a unique steady state under galvanostatic operation and up to three steady states under potentiostatic operation or under constant load. In the distributed Model, three steady states may coexist under galvanostatic operation and up to five under potentiostatic operation.
Abraham Gebregergis - One of the best experts on this subject based on the ideXlab platform.
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Solid Oxide Fuel Cell Modeling
IEEE Transactions on Industrial Electronics, 2009Co-Authors: Abraham Gebregergis, Pundy Pillay, D Bhattacharyya, R. RengaswemyAbstract:This paper discusses the Modeling of a solid oxide fuel cell using both Lumped and distributed Modeling approaches. In particular, the focus of this paper is on the development of a computationally efficient Lumped-parameter Model for real-time emulation and control. The performance of this Model is compared with a detailed distributed Model and experimental results. The fundamental relations that govern a fuel cell operation are utilized in both approaches. However, the partial pressure of the species (fuel, air, and water) in the distributed Model is assumed to vary through the length of the fuel cell. The Lumped Model approach uses the partial pressure of the species at the exit point of the fuel cell. The partial pressure of the species is represented by an equivalent RC circuit in the Lumped Model.
