...Hanad Rasool; Xiaolu Zhu; Muhammad Nabeel Siddiqui; Bilal Afzal Purpose The purpose of this paper is to design an output feedback control algorithm based on a reduced-order observer and a nonlinear disturbance observer ( DO ) for the estimation and rejection of unknown bounded disturbances...

...Muhammad Nabeel Siddiqui; Xiaolu Zhu; Hanad Rasool; Muhammad Bilal Afzal; Nigar Ahmed Purpose The purpose of this paper is to design an output-feedback algorithm based on low-power observer (LPO), robust chattering-free controller and nonlinear disturbance observer (DO) to achieve trajectory...

...Yaohua Shen; Mou Chen Purpose This study aims to achieve the post-stall pitching maneuver (PSPM) and decrease the deflection frequency of aircraft actuators controlled by the robust backstepping method based on event-triggered mechanism (ETM), nonlinear disturbance observer (NDO) and dynamic...

... the sensor fault and to reconstruct the sensor signal. Meanwhile, a nonlinear disturbance observer (NDO) is designed for disturbance estimation. The NDO and the TSCKF are combined together and an NDO-TSCKF is proposed to solve the problem of sensor faults and bounded disturbances simultaneously. Furthermore...