Flying Qualities Applications of Frequency Responses Identified from Flight Data
| Autor: | Kenneth F. Rossitto, Edmund Field, John Hodgkinson |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Journal of Aircraft. 41:711-720 |
| ISSN: | 1533-3868 0021-8669 |
| DOI: | 10.2514/1.3315 |
| Popis: | Despite increasingly accurate modeling technologies, it is still necessary to validate aircraft models with flight data. One area where this is especially critical is for flight control system development and flying qualities appraisals. Consistent with the frequency domain specification of flying qualities requirements, the method discussed is the identification of an aircraft's frequency responses from piloted frequency sweeps performed in flight. Pilot-generated frequency sweeps were performed on a range of transport aircraft, research aircraft, and simulators. The time histories from the sweeps were transformed into the frequency domain to yield frequency responses that were used for a variety of applications. In some applications, further analyses with the Low-Order Equivalent Systems method were used to identify dominant modes of the bare airframe and of elements of the aircraft's flight control system, as well as those of the augmented aircraft, which were applied to flying qualities criteria. In other applications, the frequency responses from one aircraft were compared to those from other aircraft to support handling qualities assessments in support of same type ratings and minor design changes |
| Databáze: | OpenAIRE |
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