نتایج جستجو برای: frequency response constraints

تعداد نتایج: 1578354  

Journal: :journal of applied and computational mechanics 2015
mostafa mohagheghi ali salehzadeh nobari alireza seyed roknizadeh

in the present paper, the aeroelastic stability of helicopter rotor blade is determined using aeroelastic frequency response function. the aeroelastic model of blade is obtained by combining dowell - hodges beam model with loewy unsteady aerodynamic theory which considers an unsteady wake beneath the rotor. equations are formed and aeroelastic frequency response functions are obtained by invert...

Journal: :The Journal of the Acoustical Society of America 1976

Journal: :Journal of modern power systems and clean energy 2021

Large-scale renewable energy integration decreases the system inertia and restricts frequency regulation. To maintain stability, allocating adequate frequency-sup-port sources poses a critical challenge to planners. In this context, we propose frequency-constrained coordination planning model of thermal units, wind farms, battery storage systems (BESSs) provide satisfactory supports. Firstly, m...

Journal: :international journal of management and business research 2014
p. theerthaana s. sharad

email marketing is increasingly recognized as an effective internet marketing tool. in this study, a questionnaire is constructed and distributed to a sample of 146 prospects of aditi technologies to find the factors associated with higher response rates. the collected data is analyzed using factor analysis and the 11 factors, from line, subject line, personalization of the subject line, timing...

Journal: :Automatica 1996
Brett Ninness

It is common to need to estimate the frequency response of a system from observed input-output data. In this paper we characterise, via integral constraints, the undermodelling induced errors involved in solving this problem via parametric least squares methods. Our approach is to exploit the Hilbert Space structure inherent in the least squares solution in order to provide a geometric interpre...

2013
C. S. Chuang G. W. Chang

Unit commitment (UC) is to determine the optimal unit status and generation level during each time interval of the scheduled period. The purpose of UC is to minimize the total generation cost while satisfying system demand, reserve requirements, and unit constraints. Among the UC constraints, an adequate provision of reserve is important to ensure the security of power system and the fast-respo...

E. Maani Miandoab F. Tajaddodianfar H. M. Ouakad H. Nejat Pishkenari

Many of nonlinear systems in the field of engineering such as nano-resonator and atomic force microscope can be modeled based on Duffing equation. Analytical frequency response of this system helps us analyze different interesting nonlinear behaviors appearing in its response due to its rich dynamics. In this paper, the general form of Duffing equation with cubic nonlinearity as well as par...

Journal: :Transactions of the Society of Instrument and Control Engineers 2003

1996
Shao-Po Wu Stephen Boyd Lieven Vandenberghe

We present a new semide nite programming approach to FIR lter design with arbitrary upper and lower bounds on the frequency response magnitude. It is shown that the constraints can be expressed as linear matrix inequalities (LMIs), and hence they can be easily handled by recent interior-point methods. Using this LMI formulation, we can cast several interesting lter design problems as convex or ...

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