Results 11 to 20 of about 4,475 (244)

An Approximation-Based Design Optimization Approach to Eigenfrequency Assignment for Flexible Multibody Systems

open access: yesApplied Sciences, 2021
The use of flexible multibody simulation has increased significantly over recent years due to the increasingly lightweight nature of mechanical systems.
Roberto Belotti   +3 more
doaj   +1 more source

Partial Eigenvalue Assignment for Gyroscopic Second-Order Systems with Time Delay

open access: yesMathematics, 2020
In this paper, the partial eigenvalue assignment problem of gyroscopic second-order systems with time delay is considered. We propose a multi-step method for solving this problem in which the undesired eigenvalues are moved to desired values and the ...
Hao Liu, Ranran Li, Yingying Ding
doaj   +1 more source

A Five-Component Decomposition Method with General Rotated Dihedral Scattering Model and Cross-Pol Power Assignment

open access: yesRemote Sensing, 2023
The model-based polarimetric decomposition is extensively studied due to its simplicity and clear physical interpretation of Polarimetric Synthetic Aperture Radar (PolSAR) data.
Yancui Duan   +4 more
doaj   +1 more source

Change of nullity of a graph under two operations

open access: yesKuwait Journal of Science, 2021
Two adjacent or non-adjacent vertices of a graph G are said to be identified, if they are combined to form one vertex whose neighbor is the union of their neighborhoods (ignoring any loops or multiple edges formed).
Gohdar H. Mohiaddin, Khidir R. Sharaf
doaj   +1 more source

A new general method for assigning frequencies with low spillover through structural modifications

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2023
By modifying the mass and stiffness parameters of a structure, a subset of its natural frequencies can be assigned. However, such an assignment is usually accompanied with changes of the remaining frequencies, known as ‘spillover’.
Zihao Liu   +3 more
doaj   +1 more source

A sliding mode frequency control scheme for wind turbines participating in frequency regulation support in power systems

open access: yesFrontiers in Energy Research, 2023
With high penetration of wind power, the apparent inertia of power systems is decreased, which seriously affects the safety and stability of the system frequency.
Dingwen Lu, Zhihong Ren, Jianwei Yang
doaj   +1 more source

Eigenvalue assignment in fractional descriptor discrete-time linear systems

open access: yesArchives of Control Sciences, 2017
The problem of eigenvalue assignment in fractional descriptor discrete-time linear systems is considered. Necessary and sufficient conditions for the existence of a solution to the problem are established. A procedure for computation of the gain matrices
Kaczorek Tadeusz, Borawski Kamil
doaj   +1 more source

Research on the construction of a collaborative ability evaluation system for the joint graduation design of new engineering specialty groups based on digital technology

open access: yesHeliyon, 2023
Conducting research on the construction of a collaborative ability evaluation system for the joint graduation design of new engineering specialty groups based on digital technology holds great practical relevance.
Jiandong Tian, Guifang He
doaj   +1 more source

An explicit formula of perturbating stiffness matrix for partial natural frequency assignment using static output feedback

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2018
The partial eigenvalue (or natural frequency) assignment or placement, only by the stiffness matrix perturbation, of an undamped vibrating system is addressed in this paper. A novel and explicit formula of determining the perturbating stiffness matrix is
Jiafan Zhang   +3 more
doaj   +1 more source

On eigenvalue and canonical form assignments

open access: yesLinear Algebra and its Applications, 1990
Given a controllable pair \((M,c^ T)\) the authors propose a procedure to find a vector \(\bar f\) and a transforming matrix L such that the closed loop matrix \(M-c^ T\bar f^ T\) is similar to a pre-assigned arbitrary non-derogatory matrix. ``As an eigenvalue assignment procedure, a theoretical operation count suggests that the method is more ...
Datta, B.N., Datta, Karabi
openaire   +2 more sources

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