LI Wei, GUAN Ying-zi, YAN Zhou etc. Design of super-twisting controller for rotor vehicle based on high-order sliding mode observer with laser rangefinder[J]. Editorial Office of Optics and Precision Engineering, 2017,25(12z): 18-23
LI Wei, GUAN Ying-zi, YAN Zhou etc. Design of super-twisting controller for rotor vehicle based on high-order sliding mode observer with laser rangefinder[J]. Editorial Office of Optics and Precision Engineering, 2017,25(12z): 18-23 DOI: 10.3788/OPE.20172514.0018.
Design of super-twisting controller for rotor vehicle based on high-order sliding mode observer with laser rangefinder
Unmanned aerial vehicles (UAVs) carrying a laser rangefinder can provide more accurate aircraft height information than conventional GPS or barometer measurements in actual flights
however
they can't provide the altitude velocity. This article addresses the problem of altitude tracking of aircrafts and proposes a control strategy based on the combination of a high-order sliding mode observer and a super-twisting sliding mode controller
which can respectively control and estimate the altitude velocity. First
the dynamic model of altitude direction of a rotor aircraft is established
then the high-order sliding mode observer is established to estimate state variables
and the super-twisting controller is designed. Then
a comprehensive stability analysis of the combined controller-observer based on the Lyapunov stability theory is presented
thus ensuring the asymptotic convergence of the tracking error under external bounded disturbances. The experimental results show that the super-twisting sliding mode controller can evaluate the altitude velocity accurately by using the information output from the high-order sliding mode observer
and the convergence time is 0.5 s. The combination of the super-twisting controller and high-order sliding mode observer can realize the accurate altitude control of aircrafts.
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references
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