Dynamic Behavior and Libration Control of an Electrodynamic Tether System for Space Debris Capture

This study focuses on the dynamic responses and libration angle control of an electrodynamic tether (EDT) system with a flexible tether that was designed for space debris capture. Utilizing the absolute nodal coordinate formulation (ANCF), we develop a comprehensive three-dimensional model to accurately capture the complex behavior of the EDT system, particularly the effects of tether deformation and electrodynamic forces. The analysis reveals that the behavior of the EDT system is strongly influenced by the Earth’s magnetic field in space, while the current generated in the system depends on the length and diameter of the tether—key parameters for optimizing performance. The analysis reveals that the current generated in the EDT system is influenced by tether length and diameter, which are critical parameters for optimizing system performance. Furthermore, the study examines the feasibility of using on–off switch control to manage the libration angles induced during debris capture. The results demonstrate that the EDT system can effectively stabilize libration angles across various debris masses and velocities, highlighting its potential for enhancing the efficiency and reusability of space debris removal missions. This research contributes to the understanding of flexible tether dynamics in EDT systems and provides insights into their application in sustainable space operations.