An Approach for Aeroacoustic Footprint-Modeling of Low Altitude Platforms by Means of Time Domain System Identification

Speck, Sebastian; Wilberg, Julian; Hornung, Mirko

doi:10.2514/6.2013-4341

Cited by 1 publication

(5 citation statements)

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“…This ensures that noise emissions are predictable in each flight state. For these reasons a semi-empiric noise model, which is determined from flight noise measurement data by means of system identification, is well suited, as suggested in [4]. The mentioned approach is a point source emission model which is capable of predicting the maneuver-specific emitted noise.…”

Section: Modeling Approachmentioning

confidence: 99%

“…The modeling approach according to [4] consists of an analytical equation which has the structure of the formula for sound pressure level (SPL) addition:…”

Section: Semi-empiric Noise Model By Means Of System Identification Of Flight Noise Measurement Datamentioning

confidence: 99%

“…Furthermore, [4] suggests computing the parameters with the output error method (OEM) making use of a maximum likelihood estimator (MLE) which shows high robustness against normally distributed measurement noise.…”

Section: Semi-empiric Noise Model By Means Of System Identification Of Flight Noise Measurement Datamentioning

confidence: 99%

“…The noise model identification in this approach is based on de-Dopplerized noise data, and propagation effects are neglected. A simple but yet robust semiempiric method for noise footprint modeling of UAVs can be found in [4]. Like in FRAME the model identification is based on de-Dopplerized noise data and meteorological effects on sound propagation are neglected.…”

Section: Introductionmentioning

confidence: 99%

“…This paper presents an adaption and extension of the noise modeling approach first published in [4] to an eVTOL UAV which considers vertical and horizontal flight phases. The model aims to predict the A-weighted instantaneous over all sound pressure level (OASPL).…”

Section: Introductionmentioning

confidence: 99%

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Semi-empiric noise modeling of a Cargo eVTOL UAV by means of system identification from flight noise measurement data

et al. 2021

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This publication shows the semi-empiric noise modeling of an electric-powered vertical takeoff and landing (eVTOL) unmanned aerial vehicle (UAV) by means of system identification from flight noise measurement data. This work aims to provide noise models with a compact analytical ansatz for horizontal and vertical flight which are suited for integration into a geographical information system. Therefore, flight noise measurement campaigns were conducted and evaluated. An existing noise model ansatz is adapted to the eVTOL UAV under consideration and noise models are computed from the measurement data using the output error method. The resulting models are checked for plausibility by comparing them to technical literature. The horizontal flight noise model is subjected to a correlation analysis and the influence of meteorological effects are examined. To achieve a higher level of accuracy in future noise modelings, an optimization of the microphone positions as well as the flight trajectory is carried out.

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Section: Modeling Approachmentioning

confidence: 99%

“…The modeling approach according to [4] consists of an analytical equation which has the structure of the formula for sound pressure level (SPL) addition:…”

Section: Semi-empiric Noise Model By Means Of System Identification Of Flight Noise Measurement Datamentioning

confidence: 99%

Section: Semi-empiric Noise Model By Means Of System Identification Of Flight Noise Measurement Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Semi-empiric noise modeling of a Cargo eVTOL UAV by means of system identification from flight noise measurement data

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

An Approach for Aeroacoustic Footprint-Modeling of Low Altitude Platforms by Means of Time Domain System Identification

Cited by 1 publication

References 4 publications

Semi-empiric noise modeling of a Cargo eVTOL UAV by means of system identification from flight noise measurement data

Semi-empiric noise modeling of a Cargo eVTOL UAV by means of system identification from flight noise measurement data

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