This paper presents some results of theoretical analysis of the effects of systemerrors on bowl track performance with the assumptioris of all controlcomponents and modules having been calibrated to their nomuial perf...This paper presents some results of theoretical analysis of the effects of systemerrors on bowl track performance with the assumptioris of all controlcomponents and modules having been calibrated to their nomuial perfomcelevels such that only random errors exist of which we have little control.Theporformance levels needed to be raised considerably by anpraving in our presenttechnique of predicting bowl track resistance.展开更多
Disturbance rejection algorithm based on model reference adaptive control(MRAC)augmentation is investigated for uncertain turbulence disturbances.A stable adaptive control scheme is developed based on lower diagonal u...Disturbance rejection algorithm based on model reference adaptive control(MRAC)augmentation is investigated for uncertain turbulence disturbances.A stable adaptive control scheme is developed based on lower diagonal upper(LDU)decomposition of the high frequency gain matrix,which ensures closed-loop stability and asymptotic output tracking.Under the proposed control techniques,the bounded stability is achieved and the controller is able to remain within tight bounds on the matched and unmatched uncertainties.Finally,simulation studies of a linearized lateral-directional dynamics model are conducted to demonstrate the performance of the adaptive scheme.展开更多
文摘This paper presents some results of theoretical analysis of the effects of systemerrors on bowl track performance with the assumptioris of all controlcomponents and modules having been calibrated to their nomuial perfomcelevels such that only random errors exist of which we have little control.Theporformance levels needed to be raised considerably by anpraving in our presenttechnique of predicting bowl track resistance.
文摘Disturbance rejection algorithm based on model reference adaptive control(MRAC)augmentation is investigated for uncertain turbulence disturbances.A stable adaptive control scheme is developed based on lower diagonal upper(LDU)decomposition of the high frequency gain matrix,which ensures closed-loop stability and asymptotic output tracking.Under the proposed control techniques,the bounded stability is achieved and the controller is able to remain within tight bounds on the matched and unmatched uncertainties.Finally,simulation studies of a linearized lateral-directional dynamics model are conducted to demonstrate the performance of the adaptive scheme.
