Effektiv process för luftvärdighetsgodkännande baserad på robust aeroelastisk analys

Efficient procedure for airworthiness clearance using robust aeroelastic analysis

Goals/targets: The main objective of this project is to make the process for airworthiness clearance of aircraft more efficient by means of a new method for aeroelastic stability analysis. The new method was developed in a previous NFFP-project, and makes it possible to take model uncertainty and variation into account in the analysis. This can be exploited to perform stability analysis of a set of configurations in a single analysis run, and to exploit data from flight testing to compute more reliable bounds on the flutter speed. In this project, emphasis will be put on the tools that are necessary to treat more complex cases in industry, including the development of uncertainty descriptions, the solution of the related stability problem and the use of flight test data. Result and effects: The main result from the project will be new methodology that will form a framework for a more efficient airworthiness assessment process for both civil and military aircraft. By accounting for uncertainties and variations in an early phase of new projects, the most sensitive aircraft configurations can be identified. The risk for discovering unexpected aeroelastic phenomena, such as flutter and vibrations, late in the aircraft development process will hereby be minimized. Planning and implementing: The new methodology will be applied and implemented in a modular fashion, where new modules will be integrated with the existing program structure. Hereby, it is possible for the industry to test and evaluate the new methodology early in the project and give feedback to the university. The new methodology will also be continuously validated with respect to both wind tunnel tests and data from flight flutter testing.