Title :
Adaptive and reconfigurable flight control using feed-forward action
Author :
Nelson, Eric ; Pachter, Meir
Author_Institution :
Air Force Inst. of Technol.
Abstract :
Indirect adaptive control for reconfigurable flight control is advocated. Specifically, on-line static system identification using a moving window/batch estimation, is used. The ensuing linear regression is augmented with an intercept to address the effects of trim change associated with the occurrence of a control surface failure. Parameter estimate information is used to adjust the inner loop´s control gains and a command derived from the intercept estimate is fed forward to retrim the aircraft automatically. The tracking performance of this automatic retrimming method which uses system identification, surpasses the conventional approach of exclusively relying on integral action for automatic retrimming. The novel adaptive and reconfigurable flight control system successfully handles a horizontal tail control surface loss
Keywords :
adaptive control; aerospace control; feedforward; parameter estimation; regression analysis; adaptive flight control; automatic retrimming; feedforward action; horizontal tail control surface loss; linear regression; moving window-batch estimation; online static system identification; parameter estimation; reconfigurable flight control; Adaptive control; Aerospace control; Aircraft; Automatic control; Feedforward systems; Linear regression; Parameter estimation; Programmable control; System identification; Tail;
Conference_Titel :
American Control Conference, 2006
Conference_Location :
Minneapolis, MN
Print_ISBN :
1-4244-0209-3
Electronic_ISBN :
1-4244-0209-3
DOI :
10.1109/ACC.2006.1657681