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Design of Mechanical Band-Pass Filters for Energy Scavenging: Multi-Degree-of-Freedom Models In this article, a model of a mechanical band-pass filter to be used in energy scavengers is studied. The filter is an ensemble of cantilever beams where at the tip of each beam a mass, known as the proof mass, is mounted. A beam with a proof mass at its tip is called a beam-mass system. The dynamics of a beam-mass system can be represented by its corresponding generalized single-degree-o... ...
SAGE Publications - Tập 14 Số 5 - Trang 753-768 - 2008
Analysis and experimental study on the MAGLEV vehicle-guideway interaction based on the full-state feedback theory Through the theoretical analysis and experiments on the test, the levitation control system stability of the MAGLEV vehicle on elastic track was investigated. Firstly, taking the single magnet coupled with elastic track as the object, the corresponding mathematical model and the real-time test platform based on dSPACE were founded. Secondly, two kinds of the state feedback controllers wer... ...
SAGE Publications - Tập 21 Số 2 - Trang 408-416 - 2015
Non-linear Systems Under Poisson White Noise Handled by Path Integral Solution An extension of the path integral to non-linear systems driven by a Poissonian white noise process is presented. It is shown that at the limit when the time increment becomes infinitesimal the Kolmogorov— Feller equation is fully restored. Applications to linear and non-linear systems with different distribution of the Dirac's deltas occurrences are performed and results are compared with... ...
SAGE Publications - Tập 14 Số 1-2 - Trang 35-49 - 2008
Iteration Perturbation Method for Strongly Nonlinear Oscillations In this paper, the author proposes a new perturbation technique coupling with iteration method, yielding a powerful mathematical tool for an analytical solution of nonlinear equations. The obtained results are valid not only for weakly nonlinear problems but also for strongly nonlinear ones. Furthermore, the approximate solutions are valid for the whole solution domain, and even the first... ...
SAGE Publications - Tập 7 Số 5 - Trang 631-642 - 2001
Application of high-resolution spectral analysis for identifying faults in induction motors by means of sound Induction motors are critical components for most industries. Induction motor failures may yield an unexpected interruption at the industry plant. Several conventional vibration and current analysis techniques exist by which certain faults in rotating machinery can be identified. Ever since the first motor was built, plant personnel have listened to the noises emanating from machines; wit... ...
SAGE Publications - Tập 18 Số 11 - Trang 1585-1594 - 2012
Vortex-induced vibration analysis of viscoelastically mounted rigid circular cylinders in cross-flow at a moderate Reynolds number The vortex-induced vibrations may have disastrous effects in engineering practice, affecting significantly the durability, reliability and safety of engineering structures. This is a reason for which a great deal of effort has been dedicated to the proposition of control strategies to deal with the vortex-induced vibration problem. However, few works have proposed the use of viscoelastic ... ...
SAGE Publications - Tập 24 Số 13 - Trang 2688-2700 - 2018
Identification of crack location and crack size in a simply supported beam by measurement of natural frequencies In this paper, theoretical and experimental analysis of a vibrating, simply supported beam with a crack is carried out. This method is used to address the inverse problem of assessing the crack location and crack size in various beam structures. The method is based on measurement of natural frequencies, which are of global parameter and can be easily measured from any point on the structu... ...
SAGE Publications - Tập 18 Số 2 - Trang 183-190 - 2012
Adaptive observer-based synchronization of two non-identical chaotic systems with unknown parameters In this study, adaptive observer-based synchronization of chaotic systems is considered. The master and slaves systems have different dynamics and it is assumed that the master system parameters are unknown while its states are available. First, it is assumed that the slave system parameters are known but its states are not completely available. It is shown that an observer for the slave ... ...
SAGE Publications - Tập 23 Số 3 - Trang 389-399 - 2017
Modeling the Cardiac Tissue Electrode Interface Using Fractional Calculus The tissue electrode interface is common to all forms of biopotential recording (e.g., ECG, EMG, EEG) and functional electrical stimulation (e.g., pacemaker, cochlear implant, deep brain stimulation). Conventional lumped element circuit models of electrodes can be extended by generalization of the order of differentiation through modification of the defining current-voltage relationships.... ...
SAGE Publications - Tập 14 Số 9-10 - Trang 1431-1442 - 2008
Linear impulsive control system with impulse time windows We formulate the linear impulsive control systems with impulse time windows. Different from the most impulsive systems where the impulses occur at fixed time or when the system states hit a certain hyperplane, the impulse time in the presented systems might be uncertain, but limited to a small time interval, i.e. a time window. Compared with the existing impulsive systems, the systems wit... ...
SAGE Publications - Tập 23 Số 1 - Trang 111-118 - 2017
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