Dynamic modelling and simulation of a tethered-net in space

Once the space tether-net captures the spinning space debris, a torque will be exerted on the connecting tether between the capture net and the satellite. However, the current tether-related dynamic model can't fully describe its twisting behavior. In order to address this issue, a quadratic discrete model is constructed using the lumped parameter method to accurately depict the twisting behaviors of the tether. Comparison with the traditional dynamic model and a torsional experiment for the tether verify that the quadratic discrete model can describe the responses of the tether subjected to tension, bending or torsion. It is found that the torsion of the tether will produce additional traction. Furthermore, the deployment procedure of the tether-net is subjected to simulation analysis and experimentation, which confirms the suitability of the dynamic model for the tether-net system. The simulated examination of the tether-net and space debris combo reveals that the torsional force generated by the rope's twisting will affect the stability of the primary satellite to some extent. Ignoring the twisting behavior of the tether will reduce the accuracy of the dynamic simulation model. © 2024 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.