#### DMCA

## New robust non-iterative algorithms for acoustic PDlocalization (2005)

Venue: | in oil/paper-insulated transformers” (14th International Symposium on High Voltage Engineering |

Citations: | 2 - 2 self |

### Citations

54 |
An algebraic solution of the GPS equations,
- Bancroft
- 1985
(Show Context)
Citation Context ...s a case study where generalsdependencies of positioning results on errors in arrivalstimes, errors in assumed velocity and different solversstrategies (iterative and over-determination direct solvers=-=[2]-=- for pseudo-time equations) are analyzed.sAgain just the radii of the sphere functions are modifiedswith the additional unknown ∆t. With no system overdetermination one gets:s( ) ( ) ( ) (( )21212121 ... |

8 |
A Direct Solution to GPS-Type Navigation Equations
- Krause
- 1987
(Show Context)
Citation Context ... a great advantage of the pseudo-timesnotation is a utilization of direct solution strategiessavailable for GPS-problems. They exist for thesdetermined and also for the over-determined case [1],s[2], =-=[5]-=-, [6]. With the use of direct algorithms one getssrid of the initial value dependency and furthermore itswill be shown below that direct solvers generate moresstable positioning results in the presenc... |

5 |
Algebraic Solution of GPS Pseudo-Ranging Equations
- Awange, Shan
(Show Context)
Citation Context ...vertheless a great advantage of the pseudo-timesnotation is a utilization of direct solution strategiessavailable for GPS-problems. They exist for thesdetermined and also for the over-determined case =-=[1]-=-,s[2], [5], [6]. With the use of direct algorithms one getssrid of the initial value dependency and furthermore itswill be shown below that direct solvers generate moresstable positioning results in t... |

4 |
Parameters affecting the velocity of sound in transformer oil
- Howells, Norton
- 1984
(Show Context)
Citation Context ...time signals weresfeatured, so much smaller levels could have beensresolved. The oil temperature in the tank was 21°C withsan appropriate sound velocity vs of about 1417 m/s usedsfor the calculations =-=[4]-=-. The acoustic channels werestriggered with an sensitive electromagnetic PD signals(UHF range), so this is the special case of a time offsets∆t = 0. Figure 6 shows a spatial illustration of the wholes... |

4 | All-acoustic pd measurements of oil/paper-insulated transformers for pd-localization”,
- Markalous, Feser
- 2004
(Show Context)
Citation Context ...dicatedsPD. During an offline applied voltage test an electric PDsmeasurement revealed PD levels up to 600 pC and ansautonomous acoustic measurement recorded an impulseson four sensors simultaneously =-=[8]-=-. The oil-temperatureswas about 26 C (which corresponds to 1387m/s soundsvelocity in oil) according to information from thesoperating company. Figure 13 pictures the top view ofsthe housing of the tra... |

3 |
Analytical GPS navigation solution, Quo vadis geodesia...? Festschrift for E. W. Grafarend on the occasion of his 60th birthday
- Kleusberg
- 1999
(Show Context)
Citation Context ...eat advantage of the pseudo-timesnotation is a utilization of direct solution strategiessavailable for GPS-problems. They exist for thesdetermined and also for the over-determined case [1],s[2], [5], =-=[6]-=-. With the use of direct algorithms one getssrid of the initial value dependency and furthermore itswill be shown below that direct solvers generate moresstable positioning results in the presence of ... |

2 |
H.-W.: Schallemissionsquellen automatisch lokalisieren, Die Materialprüfung (Jahrg
- Große, Reinhardt
- 1999
(Show Context)
Citation Context ... time determinationsA correct objective arrival time determination is ansimportant part of the localization procedure. Goodsexperiences have been gathered with a statistic signalenergy based criteria =-=[3]-=-. The energy curve of the signalsis here defined ass∑ = = i k ki xS 0 2s(6). Fig. 9: Comparison of the geometric arrival timessand the measured arrival time processed with thesenergy criteria The sepa... |

1 |
New approaches for three dimensional source location - examples from acoustic emission analysis. European Geosciences Union - General Assembly
- Kurz, Markalous, et al.
- 2005
(Show Context)
Citation Context ...e) timesinformation from mixed-acoustic measurements. Insterms of pseudo-times this is the special case of asvanishing time offset ∆t. Other fields of mechanicalslocation problems can also be handled =-=[7]-=-.sFig. 5: Transformer tank with high voltage winding,sPD stimulated at the inner of the winding ats(0.71 /0.225 / 0.875) m in cartesian coordinatessThe housing dimensions are 1.77m in x-directions(len... |