... perfectly. The other is the self-excited oscillation which occurs near and above the major critical speed. The objectives of the present paper are to clarify the fundamental characteristics of a ball balancer and to introduce some simple methods to eliminate these malfunctions. References 1 Leblanc...

...O. Aldraihem; A. Baz The onset of self-excited oscillations is developed theoretically for a traveling wave thermo-acoustic-piezoelectric (TAP) energy harvester. The harvester is intended for converting thermal energy, such as solar or waste heat energy, directly into electrical energy without...

...A. Barrero-Gil An attempt to measure indirectly the hydrodynamic drag ( c D ) and inertia ( c M ) coefficients on oscillating bluff cylinders (circular and square) in quiescent fluid at low Reynolds numbers (low Stokes number) is presented. The Keulegan–Carpenter number was below 15...

... dynamic performance is studied under harmonic oscillatory vibrations for a wide range of frequencies and various applied magnetic fields. Also, a theoretical analysis is conducted by proposing a three-element phenomenological model for replicating the dynamic behavior of the MRF-E mount under oscillation...

... microair vehicle is used to determine the effect of membrane prestrain on flutter and limit cycle behavior of fixed-wing membrane microair vehicles. For each configuration tested, flutter and subsequent limit cycle oscillations are measured in wind tunnel tests and predicted using an aeroelastic...

... runout on the frequency behavior of the stationary disk. It is found that the initial runout increases the frequencies of the oscillations of a stationary disk. In the next step, we study the effect of the initial nonflatness on the critical speed behavior of a spinning disk. Oscillation frequencies...

... standing waves. For the extensional wave problem, the CESE method accurately captures the sharp propagating wavefront without excessive numerical diffusion or spurious oscillations, and predicts correct reflection characteristics at the boundaries. For the resonant vibrations problem, the CESE method...

... of rotational motion. To alleviate this problem, two new command generators for tower cranes are developed for a point-to-point slewing motion. It is shown that standard shaping techniques greatly reduce oscillation and the new tower crane command generators cause even less residual vibration. Simulations...

...Sifiso Nhleko Due to its application in various dynamic systems, the free vibration behavior of a single-degree-of-freedom (SDoF) oscillator system with nonperiodic time-varying parameters has been the subject of recent interest. When dealing with this subject, past investigators have often...

...N. G. Stephen Eigenvalue veering is studied in the context of two simple oscillators coupled by a (presumed weak) spring, variants of which have been considered by several authors. The concept of a center of veering is introduced, leading to a coordinate translation; a subsequent coordinate...

... parameters on the steady-state response. A comparison is made with the available published work. 13 06 2008 24 12 2008 22 04 2009 elastic constants magnetic bearings nonlinear differential equations oscillations rotors Runge-Kutta methods time-varying systems rotor-active...

...Imao Nagasaka; Yukio Ishida; Jun Liu Forced oscillations in the vicinities of both the major and the secondary critical speeds of a continuous asymmetrical rotor with the geometric nonlinearity are discussed. When the self-aligning double-row ball bearings support the slender flexible rotor at both...

... , “ Periodic Motion and Grazing in a Harmonically Forced, Piecewise, Linear Oscillator with Impacts ,” Chaos, Solitons Fractals 0960-0779 10.1016/j.chaos.2004.09.028 , 24 , pp. 567 – 578 . Luo , A. C. J. , and Chen , L. D. , 2005 , “ The Grazing Mechanism of the Strange Attractor...

... levels can cause transition between chaos and quasi-periodic oscillations. The equation of motion for the laminate is governed by ( 1 ) A1 N x , x + N x y , y = 0 N x y , x + N y , y = 0 M x , x x + 2 M x y , x y + M...

...Jeffrey F. Rhoads; Steven W. Shaw; Kimberly L. Turner; Rajashree Baskaran Background: This paper describes an analytical study of a bandpass filter that is based on the dynamic response of electrostatically-driven MEMS oscillators. Method of Approach: Unlike most mechanical and electrical filters...

...Panagiotis Panagopoulos; Tassos Bountis; Charalampos Skokos In this paper, we use the method of homoclinic orbits to study the existence and stability of discrete breathers, i.e., spatially localized and time-periodic oscillations of a class of one-dimensional (1D) nonlinear lattices...

...Jin-Wei Liang; Brian F. Feeny Wavelet transforms were compared between various simulated friction models and real stick-slip data. While simulations of several models produced stick-slip transition oscillations seen in the real data, the wavelet features of the compliant contact model with light...

... curves including unstable solutions. The proposed method enables direct solution to the sub- and super-harmonic resonances, and gives a way to analyze nonlinear periodic oscillation under parametric excitation and internal resonance. Case study of applying the proposed method to nonlinear dynamic...

... are dynamically coupled to electrical oscillations in an electromagnet circuit. Discharge of a battery powering the electromagnet (the “damage” process in this case) is tracked using strain gauge measurements from the beam. The method is shown to accurately estimate both the battery state and the time to failure...

...Jin-Wei Liang; Brian F. Feeny This paper presents a method for estimating Coulomb and viscous friction coefficients from responses of a harmonically excited dual-damped oscillator with linear stiffness. The identification method is based on existing analytical solutions of non-sticking responses...