TY - GEN
T1 - Pressure sensing line diagnostics with an improved equivalent PI model
AU - Holbert, Keith
AU - Lin, Kang
PY - 2009/12/1
Y1 - 2009/12/1
N2 - The equivalent pi model is utilized to provide an exact representation of the transfer function of a pressure transmitter impulse line. The construct is expanded to include anomalies such as blockage and the presence of voids in the sensing line. The models are verified using data obtained from operational electric generating stations. Comparisons of simulation results based on the improved model and operation data show very good agreement, such that the proposed models are considered reasonable representations. The utility of the equivalent pi model is seen in its ability to be combined with replicas of other components in the sensing line while continuing to provide a complete description of the frequency domain features including the series of resonant frequencies. The resonant frequencies provide a fingerprint of the sensing line health. In seeking simple methods of applying the resonant frequency information to perform health monitoring of the impulse lines, two metrics with respect to the resonant frequencies are proposed in this paper.
AB - The equivalent pi model is utilized to provide an exact representation of the transfer function of a pressure transmitter impulse line. The construct is expanded to include anomalies such as blockage and the presence of voids in the sensing line. The models are verified using data obtained from operational electric generating stations. Comparisons of simulation results based on the improved model and operation data show very good agreement, such that the proposed models are considered reasonable representations. The utility of the equivalent pi model is seen in its ability to be combined with replicas of other components in the sensing line while continuing to provide a complete description of the frequency domain features including the series of resonant frequencies. The resonant frequencies provide a fingerprint of the sensing line health. In seeking simple methods of applying the resonant frequency information to perform health monitoring of the impulse lines, two metrics with respect to the resonant frequencies are proposed in this paper.
KW - Hydraulic-electric analogy
KW - Noise analysis
KW - Power spectral density
UR - http://www.scopus.com/inward/record.url?scp=77952013636&partnerID=8YFLogxK
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M3 - Conference contribution
AN - SCOPUS:77952013636
SN - 9781615676958
T3 - 6th American Nuclear Society International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2009
SP - 755
EP - 765
BT - 6th American Nuclear Society International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2009
T2 - 6th American Nuclear Society International Topical Meeting on Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies 2009
Y2 - 5 April 2009 through 9 April 2009
ER -