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ALLFlight - Blob-Based Approach to Detect Dangerous Drift- Velocities during Helicopter Landing Approaches

Gatter, Alexander and Doehler, Hans-Ullrich and Lueken, Thomas and Stadelhofer, Ralf (2013) ALLFlight - Blob-Based Approach to Detect Dangerous Drift- Velocities during Helicopter Landing Approaches. In: 39th Conference on European Rotorcraft Forum. ERF 2013, 3.-6. Sept. 2013, Moskau, Russland.

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The Institute of Flight Systems at the German Aerospace Center (DLR) site in Braunschweig is dedicating much effort to the goal of making helicopter flying safe. This paper is concentrating on decreasing the danger of accidents caused by so called "dynamic rollovers" which may result from undetected lateral velocities during the landing approach. Especially in degraded visual environment situations when pilots cannot evaluate visually the horizontal movement many accidents happen. While under normal circumstances the combination of INS and GPS is usually sufficient to detect critical lateral drift velocities during the landing process, the INS drift may reach a dangerously high value quite soon after the GPS signal has been lost (which may happen e.g. in canyons, cities, or due to jamming). The vision algorithm that is proposed here uses a blob-based approach to solve this problem. Blobs are regions in an image that fit together bound by a specific criterion. In this paper we will describe how an image is segmented, possible blobs are selected, characterized, how they are tracked, and how the velocity of the helicopter is calculated. Finally, the accuracy of this algorithm will be analyzed using data recorded from flight tests that have been conducted with DLR’s flying helicopter simulator EC135 (ACT/FHS).

Item URL in elib:https://elib.dlr.de/84125/
Document Type:Conference or Workshop Item (Speech)
Title:ALLFlight - Blob-Based Approach to Detect Dangerous Drift- Velocities during Helicopter Landing Approaches
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gatter, Alexanderalexander.gatter (at) dlr.deUNSPECIFIED
Doehler, Hans-Ullrichulli.doehler (at) dlr.deUNSPECIFIED
Lueken, Thomasthomas.lueken (at) dlr.deUNSPECIFIED
Stadelhofer, Ralfralf.stadelhofer (at) cassidian.comUNSPECIFIED
Journal or Publication Title:39th Conference on European Rotorcraft Forum
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:image processing, drift estimation, helicopter navigation, landing aid
Event Title:ERF 2013
Event Location:Moskau, Russland
Event Type:international Conference
Event Dates:3.-6. Sept. 2013
Organizer:Russian Helicopters, JSC
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
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: Gatter, Alexander
Deposited On:17 Sep 2013 15:53
Last Modified:17 Sep 2013 15:53

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