ICUAS 2020 Paper Abstract

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Paper FrA4.5

Liu, Kang (University of Science and Technology of China), Wang, Yu (University of Science and Technology of China), Ji, Haibo (University of Science and Technology of China)

Adaptive Finite-Time Tracking Control for Spacecraft Proximity Operations under Actuator Saturation

Scheduled for presentation during the Regular Session "Airspace Control" (FrA4), Friday, September 4, 2020, 10:20−10:40, Naousa

2020 International Conference on Unmanned Aircraft Systems (ICUAS), September 1-4, 2020 (Postponed from June 9-12, 2020), Athens, Greece

This information is tentative and subject to change. Compiled on March 28, 2024

Keywords Airspace Control, Control Architectures, Technology Challenges

Abstract

In this paper, we propose an adaptive finite-time control for spacecraft proximity operations (SPO) regarding to external disturbance, parametric uncertainty as well as actuator saturation. Firstly, a six degree of freedom model is constructed to describe the relative motion relationship between the target spacecraft and pursuer spacecraft. To address the challenge of external disturbance and parametric uncertainty, a finite-time controller based non-singular integral terminal sliding mode is designed. With the help of the adaptive technique, the prior knowledge of the upper bound on the compound disturbance is not required. Subsequently, to deal with the actuator saturation, a dead zone operator based model is employed. Based on Lyapunov stability theorem, the developed controller can ensure that the tracking errors converge to the origin after finite time. Last but not least, simulations are made to intuitive verify the validity of the introduced control method.

 

 

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