“…A strategy for the control of the librations of a tethered satellite system in elliptic orbits using tether length control, which drives the system to controlled periodic libration trajectories was suggested by Williams in 2006(Williams 2006a, 2006bWilliams et al 2006). In 2007 and 2008, Chung, Slotine and Miller (Chung et al 2007;) proposed a series of papers to describe a fully decentralised linear and nonlinear control law for spinning tethered formation flight, based on exploiting geometric symmetries to reduce the original nonlinear dynamics into simpler stable dynamics.…”