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Handling qualities evaluation of an automatic slung load stabilization system for rescue hoist operations

Nonnenmacher, Daniel Benjamin and Jones, Michael (2016) Handling qualities evaluation of an automatic slung load stabilization system for rescue hoist operations. CEAS Aeronautical Journal, 7 (4), pp. 587-606. Springer. doi: DOI 10.1007/s13272-016-0211-6. ISSN 1869-5590.

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Official URL: http://link.springer.com/article/10.1007/s13272-016-0211-6


The Handling Qualities (HQs) of a helicopter can be adversely affected through the presence of an externally slung load. Helicopter stability margins may be reduced, due to the additional dynamics of the load system, which can subsequently increase pilot workload, and reduce the operational envelope. An Automatic Load Damping System (ALDS) has been designed and has been successfully tested in flight. This system, alongside slung load scenarios, has been implemented within a piloted simulation in DLR’s Air Vehicle Simulator. In this article, the results from a simulated test campaign to observe the influence of the stabilization system on the vehicle HQs are presented. The system is assessed using three Mission Task Elements, modified for hoist operations. Results show that a conflict between pilot control and commanded inputs from the ALDS can cause unstable slung load oscillations and degradation in HQs in hover. However, it is shown that when the stabilization system is used only when required, both the HQs of the helicopter are conserved, and load oscillations are reduced. The results in this paper are intended to motivate future flight tests using DLR’s Active Control Technology/Flying Helicopter Simulator.

Item URL in elib:https://elib.dlr.de/106125/
Document Type:Article
Title:Handling qualities evaluation of an automatic slung load stabilization system for rescue hoist operations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Nonnenmacher, Daniel Benjamindaniel.nonnenmacher (at) dlr.deUNSPECIFIED
Jones, Michaelmichael.jones (at) dlr.deUNSPECIFIED
Date:14 September 2016
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :DOI 10.1007/s13272-016-0211-6
Page Range:pp. 587-606
Keywords:Helicopter, Slung Load, Automatic Stabilization, Rescue Hoist
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: Nonnenmacher, Daniel Benjamin
Deposited On:20 Sep 2016 15:50
Last Modified:29 Nov 2017 09:25

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