Time step size and model stiffness in the simulated slew of a tow of square sails

Details Time step size and model stiffness in the simulated slew of a tow of square sails Time step size and model stiffness in the simulated slew of a tow of square sails

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011adspr..48.1917g&link_type=abstract

Advances in Space Research, Volume 48, Issue 11, p. 1917-1921.

Computer Science

Sound

Scientific paper

In order to assess space tow solar sail stability and control feasibility, slew simulations are performed for a simplified but dynamically representative km-class tow-like sail of sixteen 25 m square units (10,000 m2 total area and 110 kg gross mass) with a 250 kg payload. It is seen that, for the dimensions considered, the space tow concept is structurally sound and its control is feasible. While observed instabilities are identified as numeric in nature and are eliminated accordingly, their very occurrence highlights the need for a refinement of the model for future studies. The analyses are carried out with custom software implementing non-standard implicit-iterative time integration with innovative elements. A new damping model, specifically tailored for the analysis of truly gossamer systems such as solar sails, is also proposed.

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