I’ve been rewriting all of my hard-coded dynamics with ModelingToolkit.jl. Here are two new extensions! They are set to automerge into the General registry in 3 days.
Astrodynamics
See AstrodynamicalModels.jl for restricted two-body and circular-restricted three-body dynamics (the latter includes local linearization dynamics). More to come!
NASA’s GTM
Chakraborty et al
published a polynomial approximation for longitudinal GTM dynamics. This approximation is available at PolynomialGTM.jl. I feel this would be a cool test bed for control theory Pluto notebooks, I’m hoping to make some of those this summer!