Journal of Vibration and Acoustics: Recent submissions
Now showing items 2181-2200 of 3913
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A Dynamical Systems Approach to Damage Evolution Tracking, Part 1: Description and Experimental Application
(The American Society of Mechanical Engineers (ASME), 2002)In this two-part paper we present a novel method for tracking a slowly evolving hidden damage process responsible for nonstationarity in a fast dynamical system. The development of the method ... -
Delay-independent Stability of Uncertain Control Systems
(The American Society of Mechanical Engineers (ASME), 2002)This paper will provide a study of the delay-independent stability of uncertain control systems, represented by a family of quasipolynomials with single time-delays. The uncertain systems that ... -
Modal Reduction of a Nonlinear Rotating Beam Through Nonlinear Normal Modes*
(The American Society of Mechanical Engineers (ASME), 2002)A method for determining reduced-order models for rotating beams is presented. The approach is based on the construction of nonlinear normal modes that are defined in terms of invariant manifolds ... -
A Dynamical Systems Approach to Damage Evolution Tracking, Part 2: Model-Based Validation and Physical Interpretation
(The American Society of Mechanical Engineers (ASME), 2002)In this paper, the hidden variable damage tracking method developed in Part 1 is analyzed using a physics-based mathematical model of the experimental system: a mechanical oscillator with a ... -
Sensitivity Analysis and Optimization of Undamped Rotor Critical Speeds to Supports Stiffness
(The American Society of Mechanical Engineers (ASME), 2002)This paper introduced a new approach that employed the assumed-modes method and the receptance method, to the sensitivity analysis and the optimization of rotor-bearing systems. First, the frequency ... -
Ride Dynamics of Nonlinear Vehicle Models Using Component Mode Synthesis
(The American Society of Mechanical Engineers (ASME), 2002)A general methodology is presented for investigating ride dynamics of large order vehicle models in a systematic and computationally efficient way. First, the equations of motion of representative ... -
An Unsymmetrical Motion in a Horizontal Impact Oscillator
(The American Society of Mechanical Engineers (ASME), 2002)Stability and bifurcation for the unsymmetrical, periodic motion of a horizontal impact oscillator under a periodic excitation are investigated through four mappings based on two switch-planes ... -
A Numerical Scheme for Dynamic Systems Containing Fractional Derivatives
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents a numerical scheme for dynamic analysis of mechanical systems subjected to damping forces that are proportional to fractional derivatives of displacements. These equations ... -
Adaptive Boundary Control of an Axially Moving String System
(The American Society of Mechanical Engineers (ASME), 2002)This paper proposes an adaptive boundary control to an axially moving string system, which couples with a mass-damper-spring (MDS) controller at its right-hand-side (RHS) boundary. Unknown parameters ... -
Autoregressive Model-Based Gear Fault Diagnosis
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents a model-based technique for the detection and diagnosis of gear faults. Based on the signal averaging technique, the proposed technique first establishes an autoregressive ... -
Analysis of Damage of Ball Bearings of Aeronautical Transmissions by Auto-Power Spectrum and Cross-Power Spectrum
(The American Society of Mechanical Engineers (ASME), 2002)Fourier analysis is used as a framework in which to obtain spectral estimates for nonstationary discrete time signals. Analysis of the auto-power spectrum and the cross-power spectrum makes it ... -
Differential Diagnosis of Gear and Bearing Faults
(The American Society of Mechanical Engineers (ASME), 2002)This paper deals with the vibration-based diagnosis of rolling element bearings in the presence of strong interfering gear signals, such as is typical of helicopter gearboxes. The key idea ... -
Experimental Demonstration of Precision Control of a Deployable Optics Structure
(The American Society of Mechanical Engineers (ASME), 2002)This paper presents the development, design, and implementation of a precision control system for a large, sparse-aperture space-deployable telescope testbed. Aspects of the testbed and laboratory ... -
Multi-State Transient Rotor Vibration Control Using Sampled Harmonics
(The American Society of Mechanical Engineers (ASME), 2002)A technique is introduced to achieve transient vibration attenuation in a multi-input, multi-output flexible rotor/magnetic bearing system. The strategy employs feedback control of measured harmonic ... -
Free Vibration Analysis of an Inflated Toroidal Shell
(The American Society of Mechanical Engineers (ASME), 2002)Free vibration analysis of a free inflated torus of circular cross-section is presented. The shell theory of Sanders, including the effect of pressure, is used in formulating the governing ... -
Vibration Analysis of Rotors Utilizing Implicit Directional Information of Complex Variable Descriptions
(The American Society of Mechanical Engineers (ASME), 2002)A complex variable description of planar motion incorporates directivity as inherent information which is therefore very convenient in vibration analysis of rotors. This paper proposes to use the ... -
A Mechanism of Low Subharmonic Response in Rotor/Stator Contact—Measurements and Simulations
(The American Society of Mechanical Engineers (ASME), 2002)There are a variety of abnormal running conditions in rotating machinery that lead to rotor/stator interaction dynamics which, in turn, have a range of effects associated with them. One of ... -
Free Vibration of Helicoidal Beams of Arbitrary Shape and Variable Cross Section
(The American Society of Mechanical Engineers (ASME), 2002)In this study, the dynamic stiffness method is employed for the free vibration analysis of helical springs. This work gives the exact solutions for the natural frequencies of helical beams ... -
Test and Theory Correlation Study for a Flexible Rotor on Fault-Tolerant Magnetic Bearings
(The American Society of Mechanical Engineers (ASME), 2002)This paper provides a new algorithm and test verification for implementing fault-tolerant operation of magnetically suspended, flexible shaft, rotating machinery. The currents to the magnetic bearing ... -
Spectral Finite Element Analysis of Sandwich Beams With Passive Constrained Layer Damping1
(The American Society of Mechanical Engineers (ASME), 2002)We present a spectral finite element model (SFEM) for sandwich beams with passive constrained layer damping (PCLD) treatments. The viscoelastic core has a complex modulus that varies with ...