Output Error Method for Tiltrotor Unstable in Hover

Output Error Method for Tiltrotor Unstable in Hover

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This article investigates unstable tiltrotor in little girls hoodie hover system identification from flight test data.The aircraft dynamics was described by a linear model defined in Body-Fixed-Coordinate System.Output Error Method was selected in order to obtain stability and control derivatives in lateral motion.

For estimating model parameters both time and frequency domain formulations were applied.To improve the system identification performed in the time domain, a stabilization matrix was included for evaluating the states.In the end, estimates obtained from various Output Error Method formulations were compared in terms of parameters accuracy and time histories.

Evaluations were 8 Piece Sectional performed in MATLAB R2009b environment.