@ARTICLE{Lichota_Piotr_Output_2017, author={Lichota, Piotr and Szulczyk, Joanna}, volume={vol. 64}, number={No 1}, pages={23-36}, journal={Archive of Mechanical Engineering}, howpublished={online}, year={2017}, publisher={Polish Academy of Sciences, Committee on Machine Building}, abstract={This article investigates unstable tiltrotor in 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 performed in MATLAB R2009b environment.}, type={Artykuły / Articles}, title={Output Error Method for tiltrotor unstable in hover}, URL={http://journals.pan.pl/Content/104231/PDF/ame-2017-0002.pdf}, doi={10.1515/meceng-2017-0002}, keywords={flight dynamics, system identification, output error method, maximum likelihood, unstable systems, tiltrotors}, }