In the paper IM torque control is studied as an example of non-holonomic system with drift terms. Following the famous Brockett integrator problem several control propositions are introduced. The paper extends the con...
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In the paper IM torque control is studied as an example of non-holonomic system with drift terms. Following the famous Brockett integrator problem several control propositions are introduced. The paper extends the control scheme from the state to the output control in several steps. By introducing adjusted amplitude, frequency and phase modulation of the IM stator current vector, the rotor flux linkage vector is implicitly forced to generate required periodic orbits that satisfy nonholonomic constraint. Improvements in the transient feedback performance, maximal steady-state efficiency, avoidance of singularities and sufficient robustness are actually achieved by making the current modulation dependent from the torque error signal. In the contrast with the original work instead of global only local stability could be assured. Simulation and experimental results illustrate main characteristics of the proposed control
The roundness error and rotation motion error of the least square center of measured section are separated by applying the roundness error separation principle based on the three-point method. Furthermore, the relatio...
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The roundness error and rotation motion error of the least square center of measured section are separated by applying the roundness error separation principle based on the three-point method. Furthermore, the relationship between the pure rotation motion error and the initial position(linear eccentricity) of the least square center of measured section is described. The mathematical expression for separating the pure rotation motion error is put forward, in which the orthogonality of the trigonometric function and the above-obtained relationship is used. The experimental result indicates that the precision measurement of the radial rotation motion error of the gyro-axle can be achieved by three-point method.
In this article, a core fuel management program for hexagonal pressurized water type WWER reactors (CFMHEX) has been developed, which is based on advanced three-dimensional nodal method and integrated with thermal hyd...
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In this article, a core fuel management program for hexagonal pressurized water type WWER reactors (CFMHEX) has been developed, which is based on advanced three-dimensional nodal method and integrated with thermal hydraulic code to realize the coupling of neutronics and thermal-hydraulics. In CFMHEX, all these feedback effects such as burnup, power distribution, moderator density, and control rod insertion are considered. The verification and validation of the code system have been examined through the IAEA WWER-1000-type Kalinin NPP benchmark problem. The numerical results are in good agreement with measurements and are close to those of other international institutes.
From the Flow-Induced Vibration(FIV) point of view,throttle orifice can be considered as one of the essential singularities in the system that disturbs the flow and causes structure *** nu
From the Flow-Induced Vibration(FIV) point of view,throttle orifice can be considered as one of the essential singularities in the system that disturbs the flow and causes structure *** nu
作者：
景文珩吴俊邢卫红徐南平Membrane Science & Technology Research Center
Key Laboratory of Material-oriented Chemical Engineering of Jiangsu Province Nanjing University of Technology Nanjing 210009 China Membrane Science & Technology Research Center
Key Laboratory of Material-oriented Chemical Engineering of Jiangsu Province Nanjing University of Technology Nanjing 210009 China new reactor with integrated conventional slurry stirred reactor and ceramic external membrane emul-sification system was introduced in this paper. Toluene and toluene containing surfactant was separately used as dispersed phase for preparation of emulsions. Two kinds of emulsions were prepared and compared. The volume average sizes of prepared emulsions were 3.53 μm and 3.6μm respectively. The results showed that the droplet sizes of two kinds of emulsions were similar but the monodispersed emulsion was only obtained with addition of surfactant into the dispersed phase.
A new reactor with integrated conventional slurry stirred reactor and ceramic external membrane emulsification system, was introduced in this paper. Toluene and toluene containing surfactant was separately used as dis...
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A new reactor with integrated conventional slurry stirred reactor and ceramic external membrane emulsification system, was introduced in this paper. Toluene and toluene containing surfactant was separately used as dispersed phase for preparation of emulsions. Two kinds of emulsions were prepared and compared. The volume average sizes of prepared emulsions were 3.53μm and 3.6μm respectively. The results showed that the droplet sizes of two kinds of emulsions were similar, but the monodispersed emulsion was only obtained with addition of surfactant into the dispersed phase.
This paper discusses a rough set approach for evaluating solutions of scheduling problems. Algorithms for solving scheduling problems are planners and the scheduling problems are modelled as constraint satisfaction pr...
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This paper discusses a rough set approach for evaluating solutions of scheduling problems. Algorithms for solving scheduling problems are planners and the scheduling problems are modelled as constraint satisfaction problems. Conventional approach for the analysis of algorithms often focuses on the time and representational complexities, and assumes an identical cost on all operations. The proposed rough set approach augments conventional approaches for the analysis of algorithms in two ways: 1) it permits the consideration of different costs arising from different operations; and 2) it allows one to define a new utility for a complexity analysis.
作者：
GRANET, IRVINGGUMAN, WILLIAMMCILROY, WILLIAMIrving Granet received his B.M.E. from The Cooper Unionhis M.M.E. from Polytechnic Institute of Brooklynhas taken Pre-Doctoral Studies at Polytechnic Institute of Brooklynand is a graduate of the Oak Ridge School of Reactor Technology.He has worked in Republic's Plasma Propulsion Laboratory on nuclear propulsion systems
space radiators thermodynamic power cycle considerations for generating electric power and system design and operation for space propulsion. He was formerly Director of Staff Engineering Nuclear Energy Department of Foster Wheeler Corporation where he directed engineering design and analysis for complete nuclear plants. Mr. Granet has taught thermodynamics and heat transfer at the Polytechnic Institute of Brooklyn and at present is Adjunct Assistant Professor of Engineering and Physics at Long Island University. He has published over 40 articles in the fields of thermodynamics
applied mechanics heat transfer and nuclear energy. He is a member of the American Society of Mechanical Engineers National Society of Professional Engineers Pi Tau Sigma and Sigma Xi. He is a licensed Professional Engineer in the State of New York. Mr. Granet is listed in the 1960 edition of American Men of Science and is a reviewer for the American Chemical Society's technical publications. William J. Guman received degrees of B. Aero. E.
M. Aero. E. from and has completed courses for Ph.D. Aero. E. at Rensselaer Polytechnic Institute. Since coming to Republic in 1959 Mr. Guman has been conducting theoretical and experimental studies on non-steady interactions and flow processes in plasma engine configurations. Mr. Guman was Assistant Professor at Rensselaer Polytechnic Institute lecturing on fluid mechanics aerodynamics performance and stability and conducting laboratory courses in experimental fluid dynamics and wind tunnel research. He also investigated flow induction and was head of Rensselaer's supersonic wind tunnel laboratory. Mr. Guman performed a theoretical analysis in experimental aerodynamic
作者：
Granet, I.Guman, W.J.Irving Granet received his B.M.E. from The Cooper Union: his M.M.E. from Polytechnic Institute of Brooklyn: has taken Pre-Doctoral Studies at Polytechnic Institute of Brooklyn: and is a graduate of the Oak Ridge School of Reactor Technology.He has worked in Republic's Plasma Propulsion Laboratory on nuclear propulsion systems
space radiators thermodynamic power cycle considerations for generating electric power and system design and operation for space propulsion. He was formerly Director of Staff Engineering Nuclear Energy Department of Foster Wheeler Corporation where he directed engineering design and analysis for complete nuclear plants. Mr. Granet has taught thermodynamics and heat transfer at the Polytechnic Institute of Brooklyn and at present is Adjunct Assistant Professor of Engineering and Physics at Long Island University. He has published over 50 articles in the fields of thermodynamics
applied mechanics heat transfer and nuclear energy. He is a member of the American Society of Mechanical Engineers National Society of Professional Engineers Pi Tau Sigma and Sigma Xi. He is a licensed Professional Engineer in the State of New York. Mr. Granet is listed in the 1960 edition of American Men of Science and is a reviewer for the American Chemical Society's technical publications. William J. Guman received degrees of B. Aero. E.
M. Aero E. from and has completed courses for Ph.D. Aero. E. at Rensselaer Polytechnic Institute. He joined Republic's PlasmA Propulsion Laboratory in 1959 and there is conducting theoretical and experimental studies on non-steady wave interactions and flow processes in plasma engine configurations. Mr. Guman was Assistant Professor at Rensselaer Polytechnic Institute lecturing on fluid mechanics aerodynamics performance and stability and conducting laboratory courses in experimental fluid dynamics and wind tunnel research. He also investigated flow induction and was head of Rensselaer's supersonic wind tunnel laboratory. At the present he is also an Adjunct Assistan
Electrically powered pulsed plasma pinch engine was proposed earlier (see Engineering Index 1961 p 1447 and 1448);present work considers pertinent overall system performance parameters, and describes experimental meth...
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Electrically powered pulsed plasma pinch engine was proposed earlier (see Engineering Index 1961 p 1447 and 1448);present work considers pertinent overall system performance parameters, and describes experimental methods of obtaining direct measurements of thrust and propellant mass consumption unique to low thrust space propulsion device;knowledge of thrust, rate of propellant consumption and input power are necessary to complete optimization study in practice.
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