A Wavelet Packet Algorithm for Online Detection of Pantograph Vibrations
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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Proceedings of the 9th IFAC Control in Transportation Systems 2000 . ed. / E. Schnieder ; U. Becker. Vol. 1 Pergamon Press, 2000. p. 235–240 (IFAC Proceedings; Vol. 33, No. 9).
Research output: Contributions to collected editions/works › Article in conference proceedings › Research › peer-review
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TY - CHAP
T1 - A Wavelet Packet Algorithm for Online Detection of Pantograph Vibrations
AU - Mercorelli, Paolo
AU - Rode, Manfred
AU - Terwiesch, Peter
N1 - Conference code: 9
PY - 2000/6/1
Y1 - 2000/6/1
N2 - Online detection and classification of changing harmonic signal content is a common issue in vehicle control, both regarding mechanical and electrical oscillations. The present paper develops a fast and numerically efficient algorithm that uses wavelet packets to detect, in real time operation, dominant oscillations as they occur in active pantograph control for electrical rail vehicles. The dominant oscillations in the investigated application are strongly time-variant, as they are influenced by train speed, catenary and rail system construction parameters, and other external factors such as wind. The paper introduces a transient indicating ratio testing in wavelet domain which defines a distance measure between two consecutive measured signals. The defined distance illuminates the difference between two signals in time-frequency domain in order to recognize when and where a transient occurs. The effectiveness of the algorithm is demonstrated in an open-loop manner on actual measured pantograph data.
AB - Online detection and classification of changing harmonic signal content is a common issue in vehicle control, both regarding mechanical and electrical oscillations. The present paper develops a fast and numerically efficient algorithm that uses wavelet packets to detect, in real time operation, dominant oscillations as they occur in active pantograph control for electrical rail vehicles. The dominant oscillations in the investigated application are strongly time-variant, as they are influenced by train speed, catenary and rail system construction parameters, and other external factors such as wind. The paper introduces a transient indicating ratio testing in wavelet domain which defines a distance measure between two consecutive measured signals. The defined distance illuminates the difference between two signals in time-frequency domain in order to recognize when and where a transient occurs. The effectiveness of the algorithm is demonstrated in an open-loop manner on actual measured pantograph data.
KW - Engineering
KW - Harmonic analysis
KW - transient signals
KW - distance transformations
KW - transportation control
KW - train control
U2 - 10.1016/S1474-6670(17)38152-1
DO - 10.1016/S1474-6670(17)38152-1
M3 - Article in conference proceedings
VL - 1
T3 - IFAC Proceedings
SP - 235
EP - 240
BT - Proceedings of the 9th IFAC Control in Transportation Systems 2000
A2 - Schnieder , E.
A2 - Becker, U.
PB - Pergamon Press
T2 - 9th IFAC Transportation Systems International Conference 2000
Y2 - 13 June 2000 through 15 June 2000
ER -