Validation and Update of Aerodynamic Database at Extreme Flight Regimes CSIR-NAL

Format:

Conference/Event

Author/Creator:

Kaliyari, Kaliyari, author.

Contributor:

Nusrath TK, Khadeeja

Singh, Jatinder

Conference Name:

SAE 2015 AeroTech Congress & Exhibition (2015-09-22 : Seattle, Washington, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2015

Summary:

AbstractAerodynamic database update from the flight tests using system identification techniques is a crucial tool for the development of control laws and high fidelity simulators. For the certification of aircraft under test, aero-database needs to be validated from flight tests throughout the flight envelope and also to certain levels beyond the envelope boundaries. Validation of aero-database close to envelope boundaries entails additional complexities which necessitates careful handling of flight data identification and update process. This paper discusses the approach adopted for aero-database update and flight clearance, followed by a discussion on the issues relevant in the extreme flight test regimes, such as, flow angle accuracy at higher angles-of-attack, center-of-gravity variation with fuel pitch angle for high-g maneuvering conditions and inaccuracies in Mach number at transonic speeds. Results from flight data identification of a high performance aircraft with relaxed static stability are presented to highlight the impact of each of these factors on aero-database update

Notes:

Vendor supplied data

Publisher Number:

2015-01-2567

Access Restriction:

Restricted for use by site license