Adaptive sliding mode controller based on super-twist observer for tethered satellite system

ABSTRACT

In this work, the sliding mode control based on the super-twist observer is presented. The parameters of the controller as well as the observer are admitted to be time-varying and depending on available current measurements. In view of that, the considered controller is referred to as an adaptive one. It is shown that the deviations of the generated state estimates from real state values together with a distance of the closed-loop system trajectories to a desired sliding surface reach a μ-zone around the origin in finite time. The application of the suggested controller is illustrated for the orientation of a tethered satellite system in a required position.

KEYWORDS:

• Adaptive sliding mode control
• second-order sliding mode observer
• tethered satellite system

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This research was supported by CONACYT with project number 251552.