Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors

Timo P. Holopainen; Seppo Aatola; C. Hunter Cloud; Guoxin Li

doi:10.1115/DETC2007-34654

Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors

Timo P. Holopainen
, Seppo Aatola
, C. Hunter Cloud
, Guoxin Li

VTT Technical Research Centre of Finland

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

Electromagnetic fields in the air gap of an electric motor produce electromagnetic forces between the rotor and stator. These forces couple the electromagnetic system to the mechanical one. This electromechanical interaction changes the vibration behaviour of the machine, and it may decrease the critical speeds, induce additional damping or cause rotordynamic instability. The experimental validation of theoretical models of these effects requires modal parameter estimation techniques which are reliable and robust. The main aim of this paper is to compare available techniques for the modal parameter estimation. The studied methods were: a) peak picking, b) prediction error, c) polyreference least-squares complex frequency-domain, d) multiple output-backward autoregression, and e) polyreference least-squares complex exponential. Experimental data for the comparison was obtained using a standard six-pole 18 kW induction motor equipped with a long flexible shaft. In addition, the theoretical values using a simple electromechanical rotor model were calculated for the test cases. Comparison showed the shortcomings of traditional frequency domain techniques and some advantages of the modern frequency- and time-domain techniques.

Original language	English
Title of host publication	ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Subtitle of host publication	21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C
Publisher	American Society of Mechanical Engineers (ASME)
Pages	1215-1224
Volume	1
ISBN (Print)	978-0-7918-4802-9
DOIs	https://doi.org/10.1115/DETC2007-34654
Publication status	Published - 2007
MoE publication type	A4 Article in a conference publication
Event	21st Biennial Conference on Mechanical Vibration and Noise - Las Vegas, United States Duration: 4 Sept 2007 → 7 Sept 2007

Conference

Conference	21st Biennial Conference on Mechanical Vibration and Noise
Country/Territory	United States
City	Las Vegas
Period	4/09/07 → 7/09/07

Access to Document

10.1115/DETC2007-34654

Cite this

Holopainen, T. P., Aatola, S., Hunter Cloud, C., & Li, G. (2007). Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors. In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C (Vol. 1, pp. 1215-1224). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/DETC2007-34654

Holopainen, Timo P. ; Aatola, Seppo ; Hunter Cloud, C. et al. / Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors. ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. Vol. 1 American Society of Mechanical Engineers (ASME), 2007. pp. 1215-1224

@inproceedings{68728000a1554b9a98baefd81872870a,

title = "Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors",

abstract = "Electromagnetic fields in the air gap of an electric motor produce electromagnetic forces between the rotor and stator. These forces couple the electromagnetic system to the mechanical one. This electromechanical interaction changes the vibration behaviour of the machine, and it may decrease the critical speeds, induce additional damping or cause rotordynamic instability. The experimental validation of theoretical models of these effects requires modal parameter estimation techniques which are reliable and robust. The main aim of this paper is to compare available techniques for the modal parameter estimation. The studied methods were: a) peak picking, b) prediction error, c) polyreference least-squares complex frequency-domain, d) multiple output-backward autoregression, and e) polyreference least-squares complex exponential. Experimental data for the comparison was obtained using a standard six-pole 18 kW induction motor equipped with a long flexible shaft. In addition, the theoretical values using a simple electromechanical rotor model were calculated for the test cases. Comparison showed the shortcomings of traditional frequency domain techniques and some advantages of the modern frequency- and time-domain techniques.",

author = "Holopainen, \{Timo P.\} and Seppo Aatola and \{Hunter Cloud\}, C. and Guoxin Li",

note = "CO:U BRG Machinery Consulting, Charlottesville, VA, United States ; 21st Biennial Conference on Mechanical Vibration and Noise ; Conference date: 04-09-2007 Through 07-09-2007",

year = "2007",

doi = "10.1115/DETC2007-34654",

language = "English",

isbn = "978-0-7918-4802-9",

volume = "1",

pages = "1215--1224",

booktitle = "ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference",

publisher = "American Society of Mechanical Engineers (ASME)",

address = "United States",

}

Holopainen, TP, Aatola, S, Hunter Cloud, C & Li, G 2007, Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors. in ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. vol. 1, American Society of Mechanical Engineers (ASME), pp. 1215-1224, 21st Biennial Conference on Mechanical Vibration and Noise, Las Vegas, Nevada, United States, 4/09/07. https://doi.org/10.1115/DETC2007-34654

Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors. / Holopainen, Timo P.; Aatola, Seppo; Hunter Cloud, C. et al.
ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. Vol. 1 American Society of Mechanical Engineers (ASME), 2007. p. 1215-1224.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors

AU - Holopainen, Timo P.

AU - Aatola, Seppo

AU - Hunter Cloud, C.

AU - Li, Guoxin

N1 - CO:U BRG Machinery Consulting, Charlottesville, VA, United States

PY - 2007

Y1 - 2007

N2 - Electromagnetic fields in the air gap of an electric motor produce electromagnetic forces between the rotor and stator. These forces couple the electromagnetic system to the mechanical one. This electromechanical interaction changes the vibration behaviour of the machine, and it may decrease the critical speeds, induce additional damping or cause rotordynamic instability. The experimental validation of theoretical models of these effects requires modal parameter estimation techniques which are reliable and robust. The main aim of this paper is to compare available techniques for the modal parameter estimation. The studied methods were: a) peak picking, b) prediction error, c) polyreference least-squares complex frequency-domain, d) multiple output-backward autoregression, and e) polyreference least-squares complex exponential. Experimental data for the comparison was obtained using a standard six-pole 18 kW induction motor equipped with a long flexible shaft. In addition, the theoretical values using a simple electromechanical rotor model were calculated for the test cases. Comparison showed the shortcomings of traditional frequency domain techniques and some advantages of the modern frequency- and time-domain techniques.

AB - Electromagnetic fields in the air gap of an electric motor produce electromagnetic forces between the rotor and stator. These forces couple the electromagnetic system to the mechanical one. This electromechanical interaction changes the vibration behaviour of the machine, and it may decrease the critical speeds, induce additional damping or cause rotordynamic instability. The experimental validation of theoretical models of these effects requires modal parameter estimation techniques which are reliable and robust. The main aim of this paper is to compare available techniques for the modal parameter estimation. The studied methods were: a) peak picking, b) prediction error, c) polyreference least-squares complex frequency-domain, d) multiple output-backward autoregression, and e) polyreference least-squares complex exponential. Experimental data for the comparison was obtained using a standard six-pole 18 kW induction motor equipped with a long flexible shaft. In addition, the theoretical values using a simple electromechanical rotor model were calculated for the test cases. Comparison showed the shortcomings of traditional frequency domain techniques and some advantages of the modern frequency- and time-domain techniques.

U2 - 10.1115/DETC2007-34654

DO - 10.1115/DETC2007-34654

M3 - Conference article in proceedings

SN - 978-0-7918-4802-9

VL - 1

SP - 1215

EP - 1224

BT - ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference

PB - American Society of Mechanical Engineers (ASME)

T2 - 21st Biennial Conference on Mechanical Vibration and Noise

Y2 - 4 September 2007 through 7 September 2007

ER -

Holopainen TP, Aatola S, Hunter Cloud C, Li G. Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors. In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C. Vol. 1. American Society of Mechanical Engineers (ASME). 2007. p. 1215-1224 doi: 10.1115/DETC2007-34654

Comparison of modal parameter estimation techniques for electromechanical rotordynamics of cage induction motors

Abstract

Conference

Access to Document

Fingerprint

Cite this