evtol networks like Archer in vehicle_setup step

[xt joey]

hey, everyone

i am trying to analysis a evtol like Archer,  with tilt propellers and VTOL-ONLY propeller(lift rotor). At first,  i tried to use Lift_Cruise(), which contains propellers and lift rotor, and i  change the propeller's orientation_euler_angles, but it seems that propellers did not work during mission of hover, so i change networks to Battery_Propeller(), and instantiate Propeller() and Lift_Rotor(), but it seems that  Battery_Propeller() can only  instantiate one of these two types at same time. then i changed my mind , i instantiate all rotor as Propeller(), treat some rotors as lift rotor, change their orientation_euler_angles = 0, and set inputs.omega = 0 in cruise mission, change other rotors's orientation_euler_angles  in configs_setup,  but results show that so-called lift_rotors's rpm is still not 0, now i am totaly confused. Now i am wondering:

1. what's the right method of networks for this kind of evtol

2. how to set rpm

3. in mission_setup, segment.state.unknowns.throttle  = 0.8 * ones_row(1), so what's the relationship between throttle and rpm

4. the Transition segment can be used for which kind of netwoks, i was trying to  instantiate a segemnt in Transition, the error show segment has no 'air_speed' attribute

Best regards

joey

[Emilio]

Hi Joey,

That's very close to the correct way of doing it.

You're actually going to want to make two different configs. One will be hover config with all the propellers/rotors. The second config will be a subset of the propellers/rotors with a different set of Euler angles. The inputs.omega isn't a user input, it's an input from the motor, hence why you're seeing RPM. Easiest thing to do is not have rotors attached.

To answer your third point, that's the initial guess. The actual value is iterated to. So 80% throttle may be a good starting point for the solver.

For point 4, the transition segments aren't well suited right now. We're in the midst of an upgrade to allowfor real tiltrotor transitions. That will be completed soon. Please follow up in a week or so and we'll let you know how those work.

-Emilio