The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform
Lorenzo Marconi - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear Output Regulation: Exploring Non-minimum Phase Systems
Three Decades of Progress in Control Sciences, 2010Co-Authors: F. Delli Priscoli, Alberto Isidori, Lorenzo MarconiAbstract:The present paper presents a new contribution to the design of output regulators for a class of nonlinear systems characterized by a possibly unstable zero dynamics. It is shown how the problem in question is handled by addressing a stabilization problem for a suitably defined reduced Auxiliary Plant.
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A dissipativity-based approach to output regulation of non-minimum-phase systems
Systems & Control Letters, 2009Co-Authors: F. Delli Priscoli, Alberto Isidori, Lorenzo MarconiAbstract:The present paper presents a new contribution to the design of output regulators for a class of nonlinear systems characterized by a possibly unstable zero dynamics. It is shown that the problem in question can be reduced to a stabilization problem, with a supplementary "gain constraint", for a suitably defined reduced Auxiliary Plant. © 2009 Elsevier B.V. All rights reserved
Tong Zhou - One of the best experts on this subject based on the ideXlab platform.
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Frequency response estimation for NCFs of an MIMO Plant from closed-loop time-domain experimental data
IEEE Transactions on Automatic Control, 2006Co-Authors: Tong ZhouAbstract:Frequency response estimation from closed-loop time-domain experimental data is investigated in this paper for normalized coprime factors (NCF) of a multiple-input-multiple-output (MIMO) Plant. Based on a linear fractional transformation (LFT) representation for all the NCFs of Plants internally stabilizable by a known controller, this estimation problem is converted into the open-loop nonparametric estimation of an inner transfer function matrix (TFM). An estimate is derived through constrained data-matching. It is proved that when the probing signals are periodic and the NCFs of the Auxiliary Plant are appropriately selected, the estimate is asymptotically unbiased and with a normal/complex normal distribution. It has been made clear that the estimation bias and the estimation variance are always finite. Computationally tractable procedures are suggested for choosing the desirable Auxiliary TFMs.
Howard J. Herzog - One of the best experts on this subject based on the ideXlab platform.
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Using Auxiliary gas power for CCS energy needs in retrofitted coal power Plants
Energy Procedia, 2011Co-Authors: Sarah Bashadi, Howard J. HerzogAbstract:Adding post-combustion capture technology to existing coal-fired power Plants is being considered as a near-term option for mitigating CO[subscript 2] emissions. To supply the thermal energy needed for CO[subscript 2] capture, much of the literature proposes thermal integration of the existing coal Plant’s steam cycle with the capture process’ stripper reboiler. This paper examines the option of using an Auxiliary natural gas turbine Plant to meet the energetic demands of carbon capture and compression. Three different Auxiliary Plant technologies were compared to integration for 90% capture from an existing, 500 MW supercritical coal Plant. CO[subscript 2] capture (via a monoethylamine (MEA) absorption process) and compression is simulated using Aspen Plus. Thermoflow software is used to simulate three gas Plant technologies. In some circumstances, it is found that using an Auxiliary natural gas turbine may make retrofits more attractive compared to using thermal integration. The most important factors affecting desirability of the Auxiliary Plant retrofit are the cost of natural gas, the full cost of integration, and the potential for sale of excess electricity.Research Council of Norway (Statoil (Firm: Norway)Massachusetts Institute of Technology. Carbon Sequestration Initiativ
F. Delli Priscoli - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear Output Regulation: Exploring Non-minimum Phase Systems
Three Decades of Progress in Control Sciences, 2010Co-Authors: F. Delli Priscoli, Alberto Isidori, Lorenzo MarconiAbstract:The present paper presents a new contribution to the design of output regulators for a class of nonlinear systems characterized by a possibly unstable zero dynamics. It is shown how the problem in question is handled by addressing a stabilization problem for a suitably defined reduced Auxiliary Plant.
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A dissipativity-based approach to output regulation of non-minimum-phase systems
Systems & Control Letters, 2009Co-Authors: F. Delli Priscoli, Alberto Isidori, Lorenzo MarconiAbstract:The present paper presents a new contribution to the design of output regulators for a class of nonlinear systems characterized by a possibly unstable zero dynamics. It is shown that the problem in question can be reduced to a stabilization problem, with a supplementary "gain constraint", for a suitably defined reduced Auxiliary Plant. © 2009 Elsevier B.V. All rights reserved
Sarah Bashadi - One of the best experts on this subject based on the ideXlab platform.
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Using Auxiliary gas power for CCS energy needs in retrofitted coal power Plants
Energy Procedia, 2011Co-Authors: Sarah Bashadi, Howard J. HerzogAbstract:Adding post-combustion capture technology to existing coal-fired power Plants is being considered as a near-term option for mitigating CO[subscript 2] emissions. To supply the thermal energy needed for CO[subscript 2] capture, much of the literature proposes thermal integration of the existing coal Plant’s steam cycle with the capture process’ stripper reboiler. This paper examines the option of using an Auxiliary natural gas turbine Plant to meet the energetic demands of carbon capture and compression. Three different Auxiliary Plant technologies were compared to integration for 90% capture from an existing, 500 MW supercritical coal Plant. CO[subscript 2] capture (via a monoethylamine (MEA) absorption process) and compression is simulated using Aspen Plus. Thermoflow software is used to simulate three gas Plant technologies. In some circumstances, it is found that using an Auxiliary natural gas turbine may make retrofits more attractive compared to using thermal integration. The most important factors affecting desirability of the Auxiliary Plant retrofit are the cost of natural gas, the full cost of integration, and the potential for sale of excess electricity.Research Council of Norway (Statoil (Firm: Norway)Massachusetts Institute of Technology. Carbon Sequestration Initiativ
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Using Auxiliary gas power for CCS energy needs inretrofitted coal power Plants; Using Auxiliary gas power for carbon capture andstorage energy needs in retrofitted coal power Plants
2010Co-Authors: Sarah BashadiAbstract:Post-combustion capture retrofits are expected to a near-term option for mitigating CO 2 emissions from existing coal-fired power Plants. Much of the literature proposes using power from the existing coal Plant and thermal integration of its supercritical steam cycle with the stripper reboiler to supply the energy needed for solvent regeneration and CO2 compression. This study finds that using an Auxiliary natural gas turbine Plant to meet the energetic demands of carbon capture and compression may make retrofits more attractive compared to using thermal integration in some circumstances. Natural gas Auxiliary Plants increase the power output of the base Plant and reduce technological risk associated with CCS, but require favorable natural gas prices and regional electricity demand for excess electricity to make using an Auxiliary Plant more desirable. Three different Auxiliary Plant technologies were compared to integration for 90% capture from an existing, 500 MW supercritical coal Plant. CO2 capture and compression is simulated using Aspen Plus and a monoethylamine (MEA) absorption process. Thermoflow software is used to simulate three gas Plant technologies. The three technologies assessed are the gas turbine (GT) with heat recovery steam generator (HRSG), gas turbine with HRSG and back pressure steam turbine, and natural gas boiler with back pressure steam turbine. The capital cost of the MEA unit is estimated using the Aspen Icarus Process Evaluator, and the capital cost of the external GT Plants are estimated using the Thermoflow Plant Engineering and Cost Estimator. The gas turbine options are found to lead to electricity costs similar to integration, but their performance is highly sensitive to the price of natural gas and the economic impact of integration. Using a GT with a HRSG only has a lower capital cost but generates less excess electricity than the GT with HRSG and back pressure steam turbine. In order to generate enough steam for the reboiler, a significant amount of excess power was produced using both gas turbine configurations. This excess power could be attractive for coal Plants located in regions with increasing electricity demand. An alternate capture Plant scenario where a greater demand for power exists relative to steam is also considered. The economics of using Auxiliary Plant power improve slightly under this alternate energy profile scenario, but the most important factors affecting desirability of the Auxiliary Plant retrofit remain the cost of natural gas, the full cost of integration, and the potential for sale of excess electricity.