In this paper, an active-passive hybrid method using negative capacitance branch circuits is used to suppress structural vibration. When a negative capacitance is connected to a shunt circuit of a piezoelectric elemen...
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In this paper, an active-passive hybrid method using negative capacitance branch circuits is used to suppress structural vibration. When a negative capacitance is connected to a shunt circuit of a piezoelectric element, it can increase the electromechanical coupling coefficient of the system and consequently improve the damping effect of the passive control as well as raise active control voltage. The system model is established and its characteristics such as the dependence of the vibration amplitude on the negative capacitance are investigated. Experimentations are carried. Experimental results show that this method is able to suppress structural vibration effectively and has better control effect than the individual active control or passive control method.
This paper explores feedback controller design for cavity flows based on reduced-order models derived using Proper Orthogonal Decomposition (POD) along with Galerkin projection method. Our preliminary analysis shows t...
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This paper explores feedback controller design for cavity flows based on reduced-order models derived using Proper Orthogonal Decomposition (POD) along with Galerkin projection method. Our preliminary analysis shows that the equilibrium of the POD model is unstable and a static output feedback controller cannot stabilize it. We develop Linear Quadratic (LQ) optimal state feedback controllers and LQ optimal observers for the linearized models. The linear controllers and observers are applied to the nonlinear system using simulations. The controller robustness is numerically tested with respect to different POD models generated at different forcing frequencies. An estimation for the region of attraction of the linear controllers is also provided.
The reason why cellular mobile telephony systems exist is that they allow frequency reuse. Dynamic allocation algorithms improve the network efficiency and the service quality. Dynamic allocation is closely related to...
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The reason why cellular mobile telephony systems exist is that they allow frequency reuse. Dynamic allocation algorithms improve the network efficiency and the service quality. Dynamic allocation is closely related to the following instantaneous allocation problem: given a number of channels (frequencies), a cell structure and the number of calls to be accommodated in each cell, find the optimum allocation of channels to cells subject to restrictions concerning the distance of cells, where the same frequency can be reused. In this paper we formulate and solve this problem by showing that it can be reduced to a 0-1 programming problem. Finally we present results, and draw subsequent conclusions.
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
This book intends to introduce some recent results on passivity of complex dynamical networks with single weight and multiple weights. The book collects novel research ideas and some definitions in complex dynamical n...
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ISBN:
(数字)9789813342873
ISBN:
(纸本)9789813342866;9789813342897
This book intends to introduce some recent results on passivity of complex dynamical networks with single weight and multiple weights. The book collects novel research ideas and some definitions in complex dynamical networks, such as passivity, output strict passivity, input strict passivity, finite-time passivity, and multiple weights. Furthermore, the research results previously published in many flagship journals are methodically edited and presented in a unified form. The book is likely to be of interest to university researchers and graduate students in Engineering and Mathematics who wish to study the passivity of complex dynamical networks.
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