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Transcript of Smart Lining - acoustic requirements on future lightweight structures … · Smart Lining -...
A Joint Diehl Thales Company
Smart Lining - acoustic requirements on
future lightweight structures
Dr. Dietmar Völkle
Head of Innovation
www.diehl-aircabin.de
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company 2
Diehl Aircabin - One of Four Operational Units
Sales: over € 700 m Employees: over 3,500 Headquarters: Laupheim, Germany
Trend 2012
joint venture with joint venture with
Sales: ≈ 230 m €
Employees: ≈ 1,200
Shareholders: 51% Diehl,
49% Thales
Sales: ≈ 330 m €
Employees: ≈ 1,400
Shareholders: 51% Diehl,
49% Thales
Sales: ≈ 140 m €
Employees: ≈ 490
Sales: ≈ 30 m €
Employees: ≈ 200
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company 3
Diehl Aerosystems - Building Blocks
From cockpit to cabin. Fully integrated or individual packages.
Aircraft Systems Cabin Interiors
Cockpit
Systems
Flight & Engine
Control Systems
Avionic
Platforms
Air Distribution
Systems
Crew Rest
Compartments
Floor-to-Floor/
Lining
VIP
Furniture
Service
Modules
Comfort
Modules
Utility
Systems
Safety & Supply
Systems
Interior Lighting
Systems
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company 4
Product Overview
Air Distribution Systems
Diehl Aircabin is the reference for advanced ducting: Less weight. Fewer parts. Less maintenance. Better accoustic.
Air Ducting and Air Outlets Drain Pipes in Composite
Technology
Highly integrated and complex
Air Ventilation Systems
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company 5
Product Overview
Compartments & Monuments
Cabin Crew Rest Compartment
(BCRC / LDCRC / UDCRC / OHCRC) and
Flight Crew Rest Compartments
Delivered in an approved quality and maturity, the compartments and monuments are optimized for quick and efficient installation. Completely tested, plug & play solutions.
Integrated Systems (O2,
Electrics, IFE, Air Ducts, Fire
Ext. System)
Highly customized Monuments
e.g. relax areas, smoking
areas, kindergarden, wine
carry areas.
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company 6
Lining & Floor-to-Floor Capabilities
Product Overview
• Dado Panels
• Sidewalls
• Light Covers
• Bins
• Ceilings • Door & Doorframe Lining
• Entrance Area
Delivered as preassembled modules with electric, lighting, O2 and safety equipment integrated.
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company 7
Product Overview
Individual Cabins / Mock-Ups
VIP & Corporate Jet Linings
* Designed by Mahler Industrial Design
Special Furniture / Real Wood
Veneer
Mock-Ups
High-end surfaces based on extremely light weight composite materials. Integrated light solutions.
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Acoustic Comfort
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Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Noise Sources affecting Interior Noise
• Noise sources outside cabin
– Engines
• Fluid mechanic noise
– Boundary layer noise
– Antenna noise
– Landing gear, slats & flaps (departure + approach)
19.10.2012 9
• Noise sources inside cabin
– Air conditioning system
– Hydraulic system
– Avionic ventilation
– Vacuum toilets
– Air extraction system
– Electrics
– Passengers
turbulent
laminar
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Cabin wall construction
19.10.2012 10
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Noise transmission paths
19.10.2012 11
Lining element
Fuselage structure
Fixing element
Glass wool
insulation
Source: Prof. Wolfgang Gleine
Air borne noise Leakage Noise Structure borne noise
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Example for Cabin Noise Distribution
19.10.2012 12
0 20 40 60 80 100
Cabin length [%]
LA
[dB] 5 dB
A330 Cruise Conditions
Source: Airbus Operations
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
General Requirements on Interior Noise
• Creation of a comfortable acoustic environment inside Cabin and Cockpit
• Silent but acoustic privacy Cabin
• As silent as possible Crew Rest Compartments
• Well balanced noise in cabin Whole Cabin, Cockpit
• No tonal components Whole Cabin, Cockpit
• Good speech intelligibility Whole Cabin, Cockpit
• Compliance to noise regulations e.g. Galley area
19.10.2012 13
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Solutions for improved cabin acoustics
Mass enhancement:
• Additional silicone heavy layer is added in order to increase the
transmission loss
• Extensive weight and cost impact
19.10.2012 14
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Solutions for improved cabin acoustics
19.10.2012 15
Noise masking
• Annoying noise from flight deck
and galley within crew rest
compartment
• Overlay of “ambient noise” in low
frequency range
• 5 kg weight investment into
intelligent noise masking system
lead to savings of weight for
standard insulation material
• Easy adaption of “masking sound”
via software update
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Conclusion
• All presented solutions show negative effects
– Weight
– Surface quality
– …
• New approach for enhanced cabin acoustics needed
• Cooperation with the German Aerospace Centre (DLR):
Smart active Lining Module (SALIM)
19.10.2012 16
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
Acoustic comfort with smart active lining modules
19.10.2012 17
• Active control of noise
emitting structural
vibrations of the sidewall
panel (ASAC)
• Best performance in the
low-frequency range
(< 500 Hz)
• Reduction of narrow- and
broadband noises
• Effective for all noise
sources entering from the
exterior of the sidewall
panels
• Suitable for retrofitting
Copyright Diehl Aircabin GmbHA Joint Diehl Thales Company
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Vielen Dank
für
Ihre Aufmerksamkeit