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This paper outlines a method of applying a linear disturbance observer to a small Unmanned Aerial System (UAS) to reduce the influence of unpredictable gusts on the non-linear aircraft dynamics. This work aims to show that by using a linear state-space model it is possible to estimate external disturbances and use the available control surfaces to alleviate the influence of gusts on aircraft dynamics...
This paper presents an active fault-tolerant control scheme for a quadrotor unmanned helicopter with velocity sensor faults. A two-level control scheme is designed to guarantee the trajectory following of the quadrotor when there are no faults. The control scheme consists of an external-loop Proportion Differentiation (PD) control law and an internal-loop Proportion Integration Differentiation (PID)...
Small Unmanned Aircraft Systems (SUASs) are increasingly being utilized for remote sensing applications due to their low-cost availability and potential for the collection of high-resolution on-demand aerial imagery. However, the field is still maturing, and there remains many questions on the accuracy and the validity of the data collected. While many researchers have investigated means of improving...
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