Implementation of a personal computer based parameter estimation program.
Graham, Robert Gordon
Howard, Richard M.
Schmidt, Louis V.
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Aircraft parameter estimation is the process of extracting numerical values for aerodynamic stability and control derivatives from flight -test time history data. This process can be used as a verification or validation tool for results obtained from windtunnel testing or through computational analysis, and can obtain or improve estimations of dynamic derivatives. This study implements the MATLAB Personal Computer (PC) based maximum likelihood estimation routine for aircraft longitudinal and lateral-directional derivatives. The parameter estimation was first accomplished on generated simulated data, with and without noise. The noise consisted of measurement and state noise which used the Dryden Gust Model. Secondly, two actual longitudinal flight-test maneuvers are analyzed for the F-14A and the T-37 aircraft. Additionally, the simulated portion of this study can be an excellent instructional aid in Flight Dynamics and Flight Test Courses.
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