WIP: Basic propagator

[AlexS12]

Objective

Implement a propagator using on OrdinaryDiffEq

• Able to work for every implemented dynamic system
  • Able to work with SixDOFEulerFixedMass
  • Able to work with SixDOFQuaternionFixedMass
  • Once these systems have been settled I will implement the others
• Capable of choosing different solvers
  • test
• Capable of tunning solver parameters
  • test
• Able to integrate considering aircraft forces and moments constant for every time step. User is responsible of the time step and will not benefit from stepsize control *yet.
• Controls will be set using set_controls_trimmer, so no generalization of FCS will be performed yet.
• Implement some typical inputs, such as step, doublet, ramp and harmonic (Implement some typical FCS inputs #57)
• Test integration against Steven's results for F16
• Test constant trimmed inputs produce coherent outputs for simple cases
• Review of trimmer (trimmer fixes #55)
• Documentation for propagator.jl and results_store.jl

[codecov]

Codecov Report

Merging #48 into master will increase coverage by 6.43%.
The diff coverage is 76.36%.

@@            Coverage Diff             @@
##           master      #48      +/-   ##
==========================================
+ Coverage   79.79%   86.22%   +6.43%     
==========================================
  Files          31       33       +2     
  Lines        1148     1198      +50     
==========================================
+ Hits          916     1033     +117     
+ Misses        232      165      -67

Impacted Files	Coverage Δ
src/models/Models.jl	100% <ø> (ø)	⬆️
src/aircrafts/trimmer.jl	96.36% <100%> (ø)	⬆️
src/models/dynamic_systems.jl	78.94% <40%> (+78.94%)	⬆️
src/models/results_store.jl	47.05% <47.05%> (ø)
src/models/propagator.jl	96.87% <96.87%> (ø)
src/models/propulsion.jl	80% <0%> (+2.5%)	⬆️
src/models/environment.jl	72.22% <0%> (+2.77%)	⬆️
src/models/aircraft.jl	73.91% <0%> (+4.34%)	⬆️
... and 5 more

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[AlexS12]

pushed force because some changes that were in this branch have been cherry picked in different PRs as they were not directly related to this feature:

#50 #51 #52 #53 #54

[AlexS12]

closing in favour of #65