A method of launching Constellation satellites using MMET tethers.
- Paper number
IAC-06-D4.3.07
- Author
Mr. David McKenzie, University of Glasgow, United Kingdom
- Coauthor
Prof. Matthew Cartmell, University of Glasgow, United Kingdom
- Year
2006
- Abstract
In light of the recent successful launch of the first Galileo Positioning System, this paper outlines a low-cost, reusable method of in-orbit constellation construction using a using a Momentum Exchange Tether (MMET). The performance of the MMET is predicted by simulation of the equations of motion of symmetrical diametrically arranged payload tethers around a central motorized hub with counter-rotating stabilizing stators. The payload gains the required Δ V by using a motor torque to angularly accelerate the payload with respect to the stator arrangement, then converting the resultant angular momentum to linear momentum by releasing the payload from the tether.
The MMET has an advantage over conventional propulsion techniques in that the four tether arms can all be used to launch payloads. Coupled with the reusability of the MMET, this allows for rapid and efficient constellation generation. Given the constellation parameters of longitude separation and satellite inclination, the MMET tether length and rotational velocity can be tailored to exactly synchronise with the constellation planes every half-rotation of the MMET, giving multiple opportunities to insert the satellite into the correct orbit.
Simulations of this scenario are provided, showing the ability of the MMET to successfully execute a plane-change for each satellite and return the central facility mass to the original orbital plane for re-supply. A stability bifurcation analysis of the system is also performed using AUTO.
- Abstract document
- Manuscript document
IAC-06-D4.3.07.pdf (🔒 authorized access only).
To get the manuscript, please contact IAF Secretariat.