Weixiang Zhou

TL;DR: The closed loop stability for the system is proved using Lyapunov stability theory and the spatial path following control of an autonomous underactuated airship in the presence of model uncertainties and external disturbances is studied.

Abstract: Airships are often under the risk of external disturbances, for example, the wind. The accurate external disturbance of the airship are hard to acquire. Typically, the super‐twisting observer can track the states for mechanical systems and could be used as an external disturbance tracker. However, the convergence rate of the traditional super‐twisting observer is very slow and the observed states often oscillate heavily. We modified the traditional super‐twisting observer by adding more variables to the sliding surface, and adding parameters to the newly added variables. Simulation results illustrates that the new proposed observer is able to reduce the convergence time and reduce overshoot greatly, improving the performance of the observer.

TL;DR: This paper studies the station-keeping control of underactuated stratospheric airships in the presence of model uncertainties and wind field, and a T–S fuzzy model-based adaptive backstepping SMC (sliding mode controller) is proposed.

TL;DR: This paper considers an airship fault detection method using DPCA and a scheme based on Kalman filter is proposed to lower the influence of sensor noise.