Component transfer path analysis method with compensation for test bench dynamics

2010 ◽  
Vol 24 (6) ◽  
pp. 1693-1710 ◽  
Author(s):  
D. de Klerk ◽  
D.J. Rixen
Keyword(s):  
Path Analysis ◽  
Test Bench ◽  
Analysis Method ◽  
Transfer Path ◽  
Transfer Path Analysis

scholarly journals Transfer Path Analysis and Contribution Evaluation Using SVD- and PCA-Based Operational Transfer Path Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-23
Author(s):  
Wei Cheng ◽  
Diane Blamaud ◽  
Yapeng Chu ◽  
Lei Meng ◽  
Jingbai Lu ◽  
...  
Keyword(s):  
Path Analysis ◽  
Principal Component ◽  
Structure Design ◽  
Shell Structures ◽  
Analysis Method ◽  
Transfer Path ◽  
Frequency Components ◽  
Transfer Path Analysis ◽  
Value Decomposition ◽  
Traditional Counterpart

To quantitatively identify the transfer paths and evaluate path contributions of shell structures, an singular value decomposition- (SVD-) and principal component analysis- (PCA-) based operational transfer path analysis method is constructed and studied in this paper. Firstly, SVD is used to determine the contribution of each path and reduce crosstalk. Secondly, PCA is applied to reduce the influence of unwanted frequency components and thus reduce noises. This allows the presented OTPA to be more accurate than its traditional counterpart. Once the transmissibility function is obtained, the response synthesis is determined, and the transfer path analysis and path contribution evaluation can be effectively carried out. Numerical and experimental case studies are carried out to validate and test the performance of the presented method. Furthermore, a comprehensive observing the influences of correlation between sources and distance of sources and receiver is also provided. Generally, this paper provides accurate transfer path analysis and path contributions for mechanical systems, which can benefit vibration and noise monitoring and reduction through vibration reduction structure design for new equipment or vibration damping on the major vibration transfer paths for current equipment.

scholarly journals OPAX: A new transfer path analysis method based on parametric load models

2011 ◽  
Vol 25 (4) ◽  
pp. 1321-1338 ◽  
Author(s):  
Karl Janssens ◽  
Peter Gajdatsy ◽  
Ludo Gielen ◽  
Peter Mas ◽  
Laurent Britte ◽  
...  
Keyword(s):  
Path Analysis ◽  
Analysis Method ◽  
Transfer Path ◽  
Load Models ◽  
Transfer Path Analysis

Noise Source Identification and Noise Reduction of PDP TV Using Transfer Path Analysis

2010 ◽  
Author(s):  
Hyung-Taek Kwak ◽  
Ji-Hyun Yoon ◽  
In-Hyung Yang ◽  
Jung-Youn Lee ◽  
Jae-Eung Oh
Keyword(s):  
Path Analysis ◽  
Noise Reduction ◽  
Noise Source ◽  
Analysis Method ◽  
Noise Sources ◽  
Transfer Path ◽  
Input Signals ◽  
Noise Source Identification ◽  
Absorbing Materials ◽  
Transfer Path Analysis

The module which is used for the operation of PDP TV consists of three main PCB board, X-board, Y-board, SMPS. Numerous studies on identifying noise sources of PDP TV, and reducing the noise have so far been done through experiments. However, it has been difficult to identify the exact noise sources due to correlations between sources as they are located close to each other. For that reason, Multi-Dimensional Spectral Analysis, MDSA, one of Transfer Path Analysis method, is increasingly required since it enables a quantitative analysis of each input signal’s contribution to the out signal to be carried out by eliminating the correlations of input signals. In this study, Transfer Path Analysis using MDSA is implemented to determine the quantitative noise contribution of each board. And the possibility of noise reduction is confirmed through the experimental method that isolates the most contributing board by adding sound-absorbing materials to it.

scholarly journals Research on Sensitive Measuring Points for Vibration Fault of NC Turret Based on Energy Flow and Transfer Path

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Fei Chen ◽  
DeCong Zhang ◽  
Wei Luo ◽  
Binbin Xu
Keyword(s):  
Finite Element ◽  
Path Analysis ◽  
Energy Flow ◽  
Flow Simulation ◽  
Flow Theory ◽  
Analysis Method ◽  
Transfer Path ◽  
Transfer Path Analysis ◽  
Test Points ◽  
Vector Images

Some equipment fault measurement points are difficult to determine. Thus, this study proposes a method using energy flow and transfer path to select sensitive measurement points. Firstly, based on the energy flow theory of the shell, the energy flow is taken as the physical quantity to describe the energy transfer of the structure vibration, and the energy-based transfer path analysis method is established. Secondly, the simulation model of the finite element energy flow was established by focusing on the NC turret, and the vector image of the energy flow transfer path of the NC turret shell was created. For the relationship between the vector images of the experimental and simulation energy flows, the validity of the finite element energy flow simulation results is verified. Lastly, three abnormal areas of the NC turret shell are identified by comparing and analyzing the energy flow vector images of the NC turret in the healthy and fault states, taking the poor meshing fault of the grooves as an example. By choosing nine test points in the abnormal areas and calculating the distribution rate of the transfer paths between the test points to the joint surfaces of the fluted disc, the energy flow distribution rate of the different fault positions to the test points is obtained. Calculation results enabled us to identify three measuring points that can accurately distinguish the fault location for a typical fault mode. This research combined energy flow theory and transfer path analysis method to determine the vibration fault sensitive measuring points of NC equipment. The proposed method is practical in the field of fault diagnosis and has broad application prospects.

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