MULTI-FIDELITY WING MASS ESTIMATION BASED ON A CENTRAL MODEL APPROACH 71th Annual Conference SAWE 2012 D. Böhnke, F. Dorbath, B. Nagel, V. Gollnick Integrated.

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Presentation transcript:

MULTI-FIDELITY WING MASS ESTIMATION BASED ON A CENTRAL MODEL APPROACH 71th Annual Conference SAWE 2012 D. Böhnke, F. Dorbath, B. Nagel, V. Gollnick Integrated Aircraft Design, DLR-LY

…derive a new method for determination of the wing weight that features the quality of a physic based model but is still as easy and quick to evaluate as a handbook method… Chart 2SAWE 2012 > Daniel Böhnke >

Chart 3 ► Design Environment ► Multi-Fidelity ► Trade Study ► Results ► Conclusion ► Design Environment ► Multi-Fidelity ► Trade Study ► Results ► Conclusion

Chart 4SAWE 2012 > Daniel Böhnke > Common Language Analysis Modules Engineering Framework

Chart 5SAWE 2012 > Daniel Böhnke > ► n(n-1) ► 2n ► Reduce No. of interfaces ► Standardize ► Product and process information ► Human readable

Chart 6SAWE 2012 > Daniel Böhnke > CPACSCPACS PESTwing Conceptual Integration Initialization Requirements VAMPzero TRIMvl

VAMPzero ► Conceptual design ► Handbook methods ► Input ► Design requirements ► Wing characteristics ► Output ► Geometry ► Structure ► Process information Chart 7SAWE 2012 > Daniel Böhnke >

TRIM VL ► Specialised AVL ► Input ► Geometry ► LoadCase ► Weight and balance ► Output ► Lift distribution Chart 8SAWE 2012 > Daniel Böhnke >

PESTwing ► Wing mass estimation ► Beam theory & statistical extension ► Inputs ► Geometry ► Structures ► (Lift distribution) ► Wing mass ► Physics based ► Analytic corrections ► Spars & skins ► Secondary structures Chart 9SAWE 2012 > Daniel Böhnke >

Symbolic Regression Chart 10SAWE 2012 > Daniel Böhnke >

Chart 11SAWE 2012 > Daniel Böhnke > LTHRaymerShevellTorenbeek Max. TOWxxx Max. ZFW xx Ref. Areaxxxx Span xx Aspect Ratioxx Thickness Ratioxx´xx Sweepxxxx Load Factor xxx Taper Ratio xx CS Area x

Chart 12SAWE 2012 > Daniel Böhnke > HighLow Max. TOW[kg] Aspect Ratio[ ]616 Thickness Ratio[ ] Sweep[deg]-2040 Taper Ratio[ ]0.10.6

Aspect Ratio SAWE 2012 > Daniel Böhnke > www.DLR.de Chart 13

mTOM SAWE 2012 > Daniel Böhnke > www.DLR.de Chart 14

Sweep SAWE 2012 > Daniel Böhnke > www.DLR.de Chart 15

Taper Ratio SAWE 2012 > Daniel Böhnke > www.DLR.de Chart 16

Thickness SAWE 2012 > Daniel Böhnke > www.DLR.de Chart 17

► Deriving f() via Symbolic Regression ► Real aircraft data ► Eliminate influence on g() ► Similar to Shevell’s approach Chart 18SAWE 2012 > Daniel Böhnke >

Chart 19SAWE 2012 > Daniel Böhnke >

Conclusion ► Central model approach ► Multi-Fidelity coupling ► Determination of wing mass with physic based methods ► Derivation of equations ► Successful, but further work necessary Chart 20SAWE 2012 > Daniel Böhnke >

Outlook ► Physical modeling of secondary structures ► Flaps ► Aileron ► Slats ► Spoiler ► Further eliminate statistical dependencies ► Coping with lift distributions Chart 21SAWE 2012 > Daniel Böhnke >

Thanks for your attention! Chart 22SAWE 2012 > Daniel Böhnke >

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