Journal ArticleDOI
Hilbert transform-based frequency response function estimation from run-up response of rotors:
N. Harish Chandra,A. S. Sekhar +1 more
- Vol. 232, Iss: 12, pp 2200-2210
Reads0
Chats0
TLDR
In this paper, a new approach is proposed which utilizes Hilbert transform and stationary wavelet transform to estimate the frequency response function from swept sine responses (obtained during run-up).Abstract:
Transient operating conditions such as run-up and run-down are often seen in automotive and other machines with variable speed rotating elements. To estimate the frequency response function from swept sine responses (obtained during run-up), a new approach is proposed which utilizes Hilbert transform and stationary wavelet transform. This method is an alternate tool for conventional swept sine frequency response function estimators like tracking vectors and co-quad analysers. The output from this algorithm is validated using frequency response function obtained using exact frequency response function expression and the conventional Fourier transform-based frequency response function. Both MATLAB simulations and experiments have been carried out in this study to estimate the frequency response function. Modal parameters are extracted from the frequency response function obtained using Hilbert transform.read more
Citations
More filters
Journal ArticleDOI
Swept-sine integration method for complex amplitude extraction of swept-sine signal
TL;DR: In this paper, a swept-sine integration method is proposed to improve the efficiency while ensuring its accuracy, which is inspired by tracking filter method and tracking integration method, utilizes a weighted integral process to extract the complex amplitude.
References
More filters
Journal ArticleDOI
Hilbert transform in vibration analysis
TL;DR: In this article, a tutorial on Hilbert transform applications to mechanical vibration is presented, with a large number of examples devoted to illustrating key concepts on actual mechanical signals and demonstrating how the Hilbert transform can be taken advantage of in machine diagnostics, identification of mechanical systems and decomposition of signal components.
Journal ArticleDOI
A complex modal testing theory for rotating machinery
TL;DR: In this paper, a new modal testing method is proposed for modal parameter identification of rotating machinery and compared with the classical method, which is essentially based on the use of complex notation which has been known to be a powerful mathematical tool in the analysis of rotor systems.
MonographDOI
Vibration monitoring, testing, and instrumentation
TL;DR: De Silva et al. as discussed by the authors presented a virtual instrumentation for data acquisition, analysis, and presentation of a VIBRATION environment, which can be used for data collection and analysis.
Journal ArticleDOI
Vibration analysis of a cracked rotor using Hilbert–Huang transform
Dan Guo,Zhike Peng +1 more
TL;DR: In this article, a rotor with a growth crack is modeled by finite element method (FEM) and Dimarogonas method, and the influence of crack propagating ratio (CGR) on instantaneous response of the rotor as it passes through the critical speed and subharmonic resonances is analyzed.
Journal ArticleDOI
Analysis of swept-sine runs during modal identification
G. Gloth,Michael Sinapius +1 more
TL;DR: In this paper, the authors focus on slow swept-sine excitation, which is a good trade-off between magnitude of excitation level needed for large aircraft and testing time.