SITIS Topic Details |
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| Proposals Accepted: | |
| Program: | STTR |
| Topic Number: | AF10-BT16 (AirForce) |
| Title: | Toward a Virtual Flight Test Capability | Research & Technical Areas: | Air Platform |
| Objective: | Develop a system level multi-body dynamic response computational simulation capability that can accurately predict integrated loads on the structure.
| Description: | Typically during Test and Evaluation of new military aircraft discrepancies are found between analysis and flight test data. Many times with higher fidelity analysis these discrepancies could be avoided, which would result in increased test efficiency and possibly reduced test points (read as saving tax dollars). This research is meant to push the limits of multi discipline modeling and simulation in order to realize this test efficiency. The objective of this research is to develop a high fidelity multi discipline simulation capability that includes but is not necessarily limited to aerodynamics, structural dynamics, propulsion dynamics, and control system dynamics (including sensor, hydraulic, and actuator modeling) of a full aircraft configuration with external stores. This simulation capability should be at least and provably second order accurate in time and space including coupling between fields. It should be capable of simulating low, sub, trans, and super sonic regimes and should be able to handle flows that are dominantly viscous or invisid. This capability should also provide a means to run simulation in real time such that it can be used to simulate a pilot in the loop, hardware in the loop, or real time decisions. It should be capable of simulating multiple bodies and resolve the interactions and relative motion between bodies. This multi body capability should also be provably second order accurate as well. This capability should also be able to accurately predict acoustic levels in both near body and far field. Specific physical phenomenon of interest that have been historically difficult to simulate include, but are not limited to, control surface buzz, free play and its effect on aeroelasticity, and buffeting. It is also desirable that this capability include the ability to model landing gear and runway (both geometric and friction profiles), cargo extraction dynamics (including parachute dynamics if possible), and simulate in hypersonic flow regime.
| PHASE I: Identify technologies required to extend simulation capability to fulfill the description above. Determine and develop path to implement these technologies into appropriate capability. Identify the test data that will be used to validate the final product to be developed and validated in phase II.
| PHASE II: Develop and demonstrate prototype for most promising technology determined in Phase I.
| PHASE III | DUAL USE COMMERCIALIZATION:
Military Application: Technology will provide capability for determining and predicting loads on military assets during operation.
Commercial Application: Technology will provide capability for determining and predicting loads on commercial aircraft assets.
| References: | 1.S.A. Morton, D.R. McDaniel, D.R. Sears, B. Tillman, and T.R. Tuckey, “Kestrel – A Fixed Wing Virtual Aircraft Product of the CREATE Program,” AIAA Paper 2009-0338, 2009. 2. J.P. Dean, S.A. Morton, D.R. McDaniel, J. Clifton, and D. Bodkin, “Aircraft Stability and Control Characteristics Determined by System Identification of CFD Simulations,” AIAA Paper 2008-6378, 2008. 3. S.A. Morton, R.M. Cummings, and D.B. Kholodar, “High Resolution Turbulence Treatment of F/A-18 Tail Buffet,” Journal of Aircraft, Vol. 44, No. 6, pp. 1769-1775. 4. S.A. Morton, R.B. Melville, and M.R. Visbal, "Accuracy and Coupling Issues of Aeroelastic Navier-Stokes Solutions on Deforming Meshes," Journal of Aircraft, Vol. 35, No. 5, September 1998, pp. 798-805. 5. P. M. Thompson, D. H. Klyde, C. Farhat, and C. Harris, “Aeroservoelastic Predictive Analysis Capability,” AIAA Paper 2007-6716, 2007. |
| Keywords: | aeroelasticity, buzz, buffet, free play, acoustic levels, multi discipline |
Questions and Answers: |
No questions posed on this topic at this time |
As of midnight September 1, questions for solicitations SBIR 10.3 and STTR 10.B will no longer be accepted.
To read the solicitation for full proposal preparation and submission details click here. |