Dynamic Surface Control with Nonlinear Disturbance Observer for Uncertain Flight Dynamic System

• 作 者: 李飞 胡剑波 吴俊 王坚浩
• 机 构: Equipment Management and Safety Engineering College,Air Force Engineering University,Institute of Cy
• 出 处: Transactions of Nanjing University of Aeronautics and Astron
• 发表日期: 2015年04期

A new robust control method of a nonlinear flight dynamic system with aerodynamic coefficients and external disturbance has been proposed.The proposed control system is a combination of the dynamic surface control(DSC)and the nonlinear disturbance observer(NDO).DSC technique provides the ability to overcome the″explosion of complexity″problem in backstepping control.NDO is adopted to observe the uncertainties in nonlinear flight dynamic system.It has been proved that the proposed design method can guarantee uniformly ultimately boundedness of all the signals in the closed-loop system by Lyapunov stability theorem.Finally,simulation results show that the proposed controller provides better performance than the traditional nonlinear controller.

A new robust control method of a nonlinear flight dynamic system with aerodynamic coefficients and external disturbance has been proposed. The proposed control system is a combination of the dynamic surface control (DSC) and the nonlinear disturbance observer (NDO). DSC technique provides the ability to overcome the “explosion of complexity” problem in backstepping control. NDO is adopted to observe the uncertainties in nonlinear flight dynamic system. It has been proved that the proposed design method can provide a guarantee of ultimately boundedness of all the signals in the closed-loop system by Lyapunov stability theorem. Finally, simulation results show that the proposed controller provides better performance than the traditional nonlinear controller.