Dynamics and offset control of tethered space-tug system

Geomagnetic Energy Approach to Space Debris Deorbiting in a Low Earth Orbit

“…Substituting equations (13) and (14) into equation 9, we obtain equations (15) and (16) (ceiling), respectively. From equations (15) and (16), when the altitude, space debris mass, length of delivery mechanism, and magnetic moment carried by the spacecraft are h, M 2 , R, and m, respectively, and the set perigee altitude (i.e., ΔV) is sure, the space debris can meet the deorbiting condition within the N orbital period under strategy equation (10) or equation (11).…”

“…[15] developed a simulator to aid net design and scenario evaluation for debris deorbiting and corresponding verification experiments in microgravity conditions were carried out on board of a Falcon-20 aircraft. For the dynamics and control of the TSS, there are two key problems needed to be solved, i.e., the suppression of spinning debris and the vibration of the tether [16]. Zhang et al in Ref.…”

“…Zhang et al in Ref. [16] firstly gave the precise 3D mathematical model and relative motion equation of the TSS and then designed an offset control law to suppress the spin of debris. In recent years, Huang and his team have built the dynamics model and achieved a series of control strategies to suppress the vibration of the tether for the TSN and TSG.…”

Dynamics of a Nonrigid Orbital Siphon at a Near-Earth Asteroid

“…Use of tethered systems for asteroid missions has been widely explored in literature for di erent applications such as asteroid deflection [7,8], tether-assisted asteroid observation [9] or asteroid artificial spinning [10] and de-spinning [11]. The orbital siphon, however, is a direct evolution of the space elevator [12,13] concept where, rather than a single payload ascending along the tether a chain of tether-connected payloads is envisaged.…”