Add model of horizontally rotating arm

[abavoil]

Hi @1-Bart-1, thank you for the suggestion.

I would like to implement a design similar to #19, where a rigid arm is swung left and right to extract electricity from the system.

• We can adjust the inertia of this arm -> should it be represented as a mass, like a tether segment, or should we directly input its inertia ? The answer will be very similar to Add model of rotating pair of wings #19
• For the torque profile, we considered both a linear profile for determining the adapted winch so that we stay in its linear range, and a more realistic one in the form $ax/(1+bx^2)$. I haven't explored WinchModels.jl yet, maybe these models are already there/just a one-liner away.

[1-Bart-1]

Hi, thanks for the issue! We should input the inertia, not the mass, so people can use different arm shapes with different inertia. We have a torque controlled winch available, so that doesn't have to be implemented. Have you checked https://ufechner7.github.io/KiteModels.jl/stable/tutorial_system_structure/? I would suggest to add a new field to the SystemStructure (take a look at src/system_structure.jl): RigidBody. This can then be connected to the Winch.

[1-Bart-1]

Replaced with #2