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Evaluation of Flight Loads Determined with MEMS Pressure Measurements

Raab, Christian (2019) Evaluation of Flight Loads Determined with MEMS Pressure Measurements. DLR-Interner Bericht. DLR-IB-FT-BS-2019-67, 95 S. (In Press)

Full text not available from this repository.

Abstract

For the certification of new aircraft types, the determination of aerodynamic loads acting on the aircraft structure is a crucial task during every flight test program. An elaborate installation of strain gauges is normally used for measuring structural strain during extensive flight test maneuvers. In order to calculate the local forces and moments from these strain measurement careful calibration of the strain gauges is required. This is usually performed on ground by imposing known loads on the structure and recording the measured strains. An alternative method for load determination is to measure the prevailing pressure distribution on the structural surface. Then the aerodynamic loads acting on the aircraft components can be calculated by integrating the measured pressure distributions along the surface. When compared to the strain gauge method, the effort for calibration is significantly less, because the pressure sensors can be calibrated without being installed inside the aircraft structure. The measurement of pressure distributions is usually performed with pressure transducers and holes in the surfaces connected by tubing. This method requires a smooth fairing of the area instrumented with pressure taps and installation space for the tubing and the pressure transducers. Sensors based on MEMS technology offer many advantageous properties for this task because of their small size and direct measurement of absolute pressures without any tubing. Because of their potential benefits for flight testing the MEMS pressure sensors were part of a research project which focused on the evaluation of MEMS pressure sensors for the determination of flight loads. For this investigation the DLR research soaring plane Discus-2c was used.

Item URL in elib:https://elib.dlr.de/127254/
Document Type:Monograph (DLR-Interner Bericht)
Title:Evaluation of Flight Loads Determined with MEMS Pressure Measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Raab, ChristianChristian.Raab (at) dlr.dehttps://orcid.org/0000-0003-4504-4165
Date:24 April 2019
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:95
Status:In Press
Keywords:loads, MEMS, pressure sensor, flight test, Discus-2c, strain gauge, sehar force, pressure distribution, pressure coefficient
Institution:DLR - Institut für Flugsystemtechnik
Department:Flugdynamik und Simulation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Flight Dynamics and Simulation
Deposited By: Raab, Dipl.-Ing. Christian
Deposited On:16 Sep 2019 15:13
Last Modified:16 Sep 2019 15:13

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