摘要
Abstract
Tiltrotor aircraft during vertical take-off and landing,hover,or low-speed flight in heli-copter flight mode are susceptible to wind disturbances,which can induce position drift and roll oscilla-tions,thereby threatening flight safety.Addressing this issue,this paper investigates a wind-resistant con-trol law for the XV-15 tiltrotor.The dynamic mechanism of crosswind disturbance on tiltrotor aircraft in helicopter mode is analyzed,highlighting the limitations of conventional lateral control laws,including atti-tude oscillations and the coupling between the inner and outer control loops.Consequently,an improved wind-resistant control method is proposed,i.e.the lateral cyclic pitch is employed to control the lateral velocity/position in the outer loop,while differential collective pitch is used to regulate the roll angle and roll rate in the inner loop.Furthermore,a nonlinear active disturbance rejection controller(NADRC)is in-troduced into the inner-loop attitude control.To verify the effectiveness of the proposed method,a com-parative study of roll angle control performance under wind disturbance scenarios is designed,contrasting the ADRC with a conventional PID controller.A co-simulation platform based on MATLAB/Simulink and X-Plane is established to compare and analyze the dynamic responses of the conventional control law and the improved control law under wind disturbances.Simulation results demonstrate that the proposed control strategy significantly enhances system stability,robustness,and dynamic tracking performance un-der lateral wind disturbances,thereby providing theoretical and methodological support for the design of wind-resistant control laws for tiltrotor aircraft in helicopter mode.关键词
倾转旋翼机/直升机模式/风扰动/操纵冗余/非线性自抗扰Key words
tiltrotor aircraft/helicopter mode/wind disturbance/control redundancy/nonlinear active disturbance rejection control(NADRC)分类
航空航天
