Fragniere, Benjamin and Wartmann, Johannes (2015) Local Polynomial Method Frequency-Response Calculation for Rotorcraft Applications. In: AHS 71st Annual Forum. 71st AHS Annual Forum, 2015-05-05 - 2015-05-07, Virginia Beach, Virginia, USA.
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Abstract
Frequency-response function calculation is an essential element in rotorcraft data analysis, especially for system identification,model validation and model analysis. This article analyzes the performance of a recently developed method for the calculation of frequency-response functions, called the local polynomial method (LPM), when applying it to rotorcraft systems. The local polynomial method is presented as an alternative to the methods that are based on segmenting and windowing the data and is particularly effective in reducing the leakage error. The performance of both methods is first compared based on simulated data from linear helicopter models in various conditions. The simulated data allows to separately investigate the influence of: signal-to-noise ratio, signal length, frequency range, type of excitation and input correlation. The conditions under which the local polynomial method is superior to the windowing methods are given. Finally, flight test data are used to validate the results observed in the simulations.
Item URL in elib: | https://elib.dlr.de/100626/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | Local Polynomial Method Frequency-Response Calculation for Rotorcraft Applications | ||||||||||||
Authors: |
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Date: | May 2015 | ||||||||||||
Journal or Publication Title: | AHS 71st Annual Forum | ||||||||||||
Refereed publication: | No | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | No | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Frequency-response calculation, Local Polynomial Method | ||||||||||||
Event Title: | 71st AHS Annual Forum | ||||||||||||
Event Location: | Virginia Beach, Virginia, USA | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Start Date: | 5 May 2015 | ||||||||||||
Event End Date: | 7 May 2015 | ||||||||||||
Organizer: | American Helicopter Society International | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Aeronautics | ||||||||||||
HGF - Program Themes: | rotorcraft | ||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||
DLR - Program: | L RR - Rotorcraft Research | ||||||||||||
DLR - Research theme (Project): | L - The Smart Rotorcraft (old) | ||||||||||||
Location: | Braunschweig | ||||||||||||
Institutes and Institutions: | Institute of Flight Systems > Rotorcraft | ||||||||||||
Deposited By: | Fragniere, Benjamin | ||||||||||||
Deposited On: | 11 Jan 2016 11:18 | ||||||||||||
Last Modified: | 24 Apr 2024 20:06 |
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