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Institute of Flight Systems

Institute of Flight Systems. Recent Activities 102 ACGSC Committee Meeting 17 October 2008, Niagara Falls, New York Oliver Brieger, German Aerospace Center (DLR) oliver.brieger@dlr.de. DLR is Germany’s aerospace research center and space agency.

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Institute of Flight Systems

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  1. Institute of Flight Systems Recent Activities102 ACGSC Committee Meeting17 October 2008, Niagara Falls, New YorkOliver Brieger, German Aerospace Center (DLR)oliver.brieger@dlr.de

  2. DLR is Germany’s aerospace research center • and space agency Member of Hermann von Helmholtz-Association of National Research Centers (HGF)

  3. DLR • performs basic research • develops novel technologies • builds and operates large-scale test facilities • assumes management tasks • trains junior scientists

  4. Sites 31 research institutes and scientific/technical facilities at 8 sites 4 branches German-Dutch Wind Tunnels (DNW) European Transonic Wind Tunnel (ETW) German Armed Forces Flight Test Center Manching

  5. Flight Sciences Cognectics Guidance & Control Flight Mechanics & Flight Dynamics, SysID and Modelling Dynamic Interaction between Human Operator and Machine Control Technology and Application, Advanced Autonomy Institute of Flight Systems Systems & Flight Safety System Integration of S.-Critical Systems, Systems Engineering Technology Validation by Experiment DLR Report DLR Report Theory Ground Experiment Flight Test & Research

  6. Flying Testbeds Bo-105 ARTIS-Family (Micro,Midi, Maxi) VFW 614 ATTAS EC 135 - FHS USTOL / MIL Demo ?(in acquisition) A 320 Advanced Technology Research Aircraft - ATRA Full access to experimental systems and equipment -> in house design

  7. Aircraft Wake Vortex & Atmospheric Turbulences: Modelling, Interaction and Control • Theory • Messurement • Modelling • Solutions • Verification • Application

  8. A400M Low Level Flight Functions with ATTAS Inflight Simuation and Demonstration of Advanced Low Level Flight Functions for Large Transport Aircraft

  9. Active Control Technology – Improved Mission Effectiveness (ACT-IME) with EC 135 FHS • Successful Demonstration of new EC-F functions • New active Sidestick concept

  10. WASLA-HALE – Remote Mission Steering and Integration of UAV into Air Traffic Management Relais A/C AFCS /ATHR FMS MMS-Bord RAPIN+ COM 2 COM 1 Command Data Link with Intercom COM 3 GCS Braunschweig GCS Manching

  11. Rotorcraft - New Technologies • Only 25% of noise • Only 10% of vibration level, reducing scheduled maintenance cost > 50% • Marginal Improvement of Efficiency Active Twist Blade on Test Rig Innovative New Rotor but: „Circle-shaped Rotor-Wing“ limits economy of fast flight

  12. Flight Test Group Manching Involved in all aspects of military flight testing (mainly HQ, CFH and performance) • For Eurofighter/ Typhoon • soon for A400M

  13. y x Eurofighter Air-to-Surface HQ Evaluation for Swing-Role Adaptation (Ground Attack Test Equipment II - GRATE II) • Based on GRATE and ATLAS systems developed in the late 80s to evaluate handling qualities during air-to-surface tracking • Array of lighted targets are placed at predefined positions on the ground • During a prolonged gun attack, target lights are illuminated in a predefined sequence • Pilot has to acquire and track the respective target expeditiously and precisely, being forced to react continuously using a high gain piloting technique • Employed to assess and optimize tracking filter with respect to gross acquisition and fine tracking Target Area Aircraft

  14. Flight Test Parameters and Simulated Attack Geometry

  15. Employment of GRATE II for Pilot Model IdentificationOptimization of Target Array Geometry • Requirement: nearly uniform and small angle variations (0.4 - 1 deg) due to small perturbations approach x x1 1 deg limit 133 m Aperture Angle [deg] x2 y 123 m y1 y2 y4 y5 Last angle alteration x3=y3 112 m 0.4 deg limit x4 102 m Distance x to reference target x5 4 x 21.5 m

  16. 3 Multi-step Approximation v a4 x 1 2 a3 a1+a2 r ( t ) a2 a1 1 a2 v v x 3 x 3 0 v v Amplitude [deg] x 4 Aperture angle progression [deg] x 4 - 1 v a3 x 5 - 2 a1 a2 a3 a4 a3+a4 - 3 - 5000 - 4000 - 3000 - 2000 - 1000 Distance x to the reference target [m] Distance x to the reference target [m] Input Signal into the Pilot-Aircraft System Defined by: • The varying line of sight between the aircraft and the individual targets • Target illumination sequence x x1x2x3 x4x5

  17. Amplitude Spectrum Dt = 2.25s – 3s maximum of C zero location CP0.5 P0.5 Amplitude [deg] Frequency w [rad/s] - w D 1 cos( t ) D 2 t w D 2 ( t ) C0.5 t [ s ] D w [rad/s] 0 p/2 p 3p/2 2p Frequency w [rad/s] 0 p/2 p 3p/2 2p Sequence Selection • Maximized power spectra over a wide frequency range → Fourier Analysis

  18. Pilot Model IdentificationResults

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