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Topic for open discussion:
   Complexity of an AWES
Complexity of a Kite System     |    Complexity of a Kite    |  Kite Complexity
  • How might the "complexity" of a kite (kite system, AWES) be described, measured, compared?  Will this consideration become useful in AWE? Will AWES be comparable on the basis of complexity? Kite-sim programs have assumed some models that presumptively aim to approximate reality; how is such realm doing up to the present; what may be importantly missing yet?

  • wiki/Complexity_measure   

  • wiki/Complex_system    One optional direction towards measuring AWES complexity is linked.

  • Measuring AWES 

  • LSM :: Lattice Spring-mass Models or Lattice Spring Model(s)      (note, early in our forum we have used minorly "LSM" for line-speed multiplier; context should make the acronym obvious)
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Sept. 21, 2020, post by Dave Santos
Re: More Lattice-Spring-Mass Models (LSM running in a CFD sim is the Holy Grail)

Yes, TUDelft has done fantastic work, Tragically, in 2012, they lost the Great Frisian Astronaut, Prof. Wubbo Ockels, who was already moving toward many-connected AWES topology (SpiderMill). SInce then TUDelft has confined research to single-line topology with all the limitations, dependencies, and vulnerabilities.

Seeing Lattice-Boltzmann Methods as the most computable and flexible multi-physics sim mathematics. Unfortunately, there is no seamless do-all LB tool. We are left with partial models. Even just combining LSM as such with wing aerodynamics and realistic wind CFD is going to be a big challenge. The end-goal is grid Watts and LCOE. Each domain has an isolated data-representation.
Sept. 18, 2020, post by Dave Santos
More Lattice-Spring-Mass Models (LSM running in a CFD sim is the Holy Grail)

Selected LSMs (Lattice Spring Models). Last link has even an LSM embedded in a CFD sim.

LSM jiggles with phonon gas when vibrated from one corner point.
A crude AWES analog running in reverse, in quasi- turbulence.
Spring-Mass System

Walking as a spring-mass network.
An ideal multi-r lattice is like a walking animal. (nominally smooth wind)

(PDF) Stable and Robust Walking with Compliant Legs

Where is the best high-end CFD LSM (lattice spring-mass) sim?
(See bottom for a starting case.)

Basic LSM sim can be cobbled from even an Excel Spreadsheet.
Spring-mass mesh simulation in Excel 1

Some attractive morphology:
(PDF) Tidal spin down rates of homogeneous triaxial viscoelastic bodies

Further phonon realism:    

Finally a hint of an LSM in a CFD sim:    Here   See image there!
Not quite an exact fit to multi-r sim need, but getting close!
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Just remembered this paper, where the AWES kite is modeled as a damped spring-mass (so it is a lattice unit-cell model). The "steering inputs" would be the limit cycles imposed by lattice unit-cell neighbors.

UweF is great guy, who has struggled in the AWE shadows poorly supported:
Dynamic Model of a Pumping Kite Power System                [d]  
Uwe Fechner, Rolf van der Vlugt, Edwin Schreuder, Roland Schmehl
Delft University of Technology, Faculty of Aerospace Engineering, Kluyverweg 1, 2629HS Delft, Netherlands