کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1716661 1520011 2009 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
YES2 optimal trajectories in presence of eccentricity and aerodynamic drag
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
پیش نمایش صفحه اول مقاله
YES2 optimal trajectories in presence of eccentricity and aerodynamic drag
چکیده انگلیسی

YES2 (launching 2007) aims to demonstrate a tether-assisted re-entry concept, whereby payload will be returned to Earth using momentum provided from a swinging tether. Deployment takes place in two phases: (1) deployment of 3.5 km of tether to the local vertical and hold, and (2) deployment to 30 km for a swinging cut. Optimal trajectories are determined for both phases after comparing the effect of different cost functions on the deployment dynamics. Closed-loop control is provided by linearizing the dynamics around the optimal trajectories and solving a receding horizon control problem for a set of linear feedback gains. The controllers are tested in a flexible tether model with large disturbances to the hardware model and environmental variables. Closed-loop simulations show that the system can be controlled quite well using only feedback of length and length rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Astronautica - Volume 64, Issues 7–8, April–May 2009, Pages 745–769
نویسندگان
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