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This paper presents a systematic method on establishing a switched polytopic LPV model for the fight dynamics in high angle of attack maneuver. A conventional LPV system scheduled by angle of attack and roll rate is derived from the five-dof nonlinear dynamics of the aircraft based on the state transformation method. The LPV model is further transformed into the polytopic form though Tensor-Product...
Wing rock is a highly nonlinear phenomenon, which is a main limit-cycle oscillation for an aircraft operating at subsonic speeds and high angles of attack. It is a challenge to design a valid controller under the condition that there exists model error and external disturbance. In this paper, a sliding mode disturbance observer based on homogeneity is proposed to improve the disturbance estimate performance...
Lots of researches were focus on aerodynamic characters of the head, top and tail of vehicle in the past, but researches on bottom of vehicle were quite rare. This has been changed in these days. Optimization of aerodynamics via shape of vehicle was limited by modern automotive styling. So the focus has been moved to bottom of vehicle. In current work, the aerodynamic influence of ground clearance...
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