Re: [AWES] Power Maximization of a Closed-orbit Kite Generator System
- This nice analysis and simulation helps validate "closed-orbit" AWES flight. Sadly, it did not go so far as to simulate "open-orbit" in the same framework, for a directly comparative result.We had been calling closed-orbit modes "short-stroke" pumping (brief recovery during swept loops or figure-of-eights), but closed-orbit is better more-precise usage. Similarly, open-orbit is better technical description than "long-reeling" or "yo-yo".Closed orbits conserve airspace, reduce gaps in the generation cycle, and avoid excessive line wear (just a short chafe-resistant section is needed at the fairlead). Open orbits characterized the primitive proof-of-concept phase for many teams, but are expected to fade away in future design cycles by dominant teams.Another nice prediction of this work is a that a nice wide eight seems power-optimal compared to a tight or tilted eight). "Lazy" eights is the pattern that comes natural to traction kite pilots and is the tamest aerobatic pattern. A tilted eight helps tug a load crosswind or upwind and the tight eight (Dutch Roll mode) is useful for controlled power-limiting.