Angular velocity observer for space tether exploiting non-singular dynamics and vector measurements

Dynamic modeling and analysis of the looped space tether transportation system based on ANCF

“…The space tether transportation system (TTS) has a wide scope of applications for low‐cost long‐range mass transportation missions 1–5 . Many researchers have devoted themselves to the developments of the field 6–10 .…”

“…It is noteworthy that the name libration motion described here originated from lunar libration and has been carried over into some of the more modern analyses of the motion of artificial satellites. That is, the motion of the satellite's mass center is distinguished from its motion about that point by referring to the former as the orbital motion and the latter as the libration motion 5,16 . To depict tether bending and longitudinal deformations of TTS, Li et al 17,18 employed the nodal position finite element method (NPFEM) to accurately model TTS.…”

“…That is, the motion of the satellite's mass center is distinguished from its motion about that point by referring to the former as the orbital motion and the latter as the libration motion. 5,16 To depict tether bending and longitudinal deformations of TTS, Li et al 17,18 employed the nodal position finite element method (NPFEM) to accurately model TTS. Woo and Misra 19 studied the TTS response considering distinctions among the three centers of mass, gravity, and orbit and pointed out that varying the system parameters does not affect the dynamics of TTS.…”