This paper deals with the problem of model reduction based on an optimization technique. The objective function being minimized in the impulse energy of the overall system with unity, single-sided and doublesided weightings. A number of properties of the gradient flows associated with the objective
Time–Frequency Analysis of a Variable Stiffness Model for Fault Development
✍ Scribed by Leon Cohen; Lorenzo Galleani; Robert Hedges; David Hughes; Patrick Loughlin; Bruce Suter
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 340 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1051-2004
No coin nor oath required. For personal study only.
✦ Synopsis
Over the past 50 years it has been found that many real systems have spectra which are changing in time. In this article we explore the possibility of describing such systems with harmonic and nonlinear oscillator equations whose coefficients are time dependent. We show that time-frequency analysis offers a powerful method to study such systems.
📜 SIMILAR VOLUMES
Modal analysis is usually conducted in the frequency domain. If frequency domain methods work very well when damping is low, noise level is low and natural frequencies are not too much closed, these methods however by requiring an averaging of the samples, are always time-consuming. On the other han