Using Aviary to only simulate and not optimize a specified mission

[superlil27]

I am looking to use Aviary to run sweeps of missions to explore my aircraft's performance. I tried setting constant speed segments to make mission integration faster but this was not working with IPOPT (unconverged trajectory is shown below for the aircraft_for_bench_FwFm_out vehicle).

I also tried removing the range and target range constraint and set durations for each segment but this didn't work either.

Is there a way to run Aviary to just simulate a mission once without it trying to minimize fuel burn or anything else?

[jkirk5]

By default Aviary uses the collocation method to solve the trajectory - this method is powerful, but always requires optimization, as that is how the method also ensure that the chosen trajectory is feasible. In your case, since you don't mind if a trajectory isn't optimal, just feasible, a shooting method is what you want to use. We have a mostly complete implementation of the SGM method in Aviary, but it has some limitations (search the docs for "SGM" for specifics).

Try following along with this example, which uses the Level 2 Python interface

[superlil27]

Thank you! I'll go through that example.

[superlil27]

While running the example I didn't quite get an output.

It also created a bunch of output folders with just the inputs in them.

This might be what you referred to as "mostly complete implementation of the SGM method". Just wanted to share it here in case others had a similar issue.