Throttle / Power management for beginners - Arduplane VTOL

ArduPlane VTOL Plane
1

I’ve had this problem before and still can’t tell what I should do.
When I’m using a high power battery like a 5S or 6S it’s impossible to control the aircraft, I’ve done already a VTOL aircraft and managed to fly it and even make a transition to forward flight but with many problems (spins out of control during transition).

This time I decided to create a test frame just for the sake of saving my planes, and test the VTOL firmware specially the power or thrust problem I’m having. I was playing with parameters like Q_M_SPIN_MIN, Q_M_SPIN_ARM, and Q_M_THST_EXPO but as you can see in the video the aircraft takes off really violently, for sure in a VTOL plane with the extra weight it’ll be more stable, but I’ve tried that before and the same happens, I’m not sure what parameter to change, I haven’t been able to move on to other settings like PID tuning because of it. Also, I never feel that I have enough YAW authority, and I think that’s a problem when doing the transitions, and it starts to spin. I would appreciate all the help from this community.

In the video you can see how the throttle never got close to even 30% and it shoots to the sky, also I’m using Q_stabilize

Some time ago I had good results with a 3S battery, but the Idea here is that no matter what battery we use we still have control.

Link to .log and .param https://drive.google.com/drive/folders/158gi5OlVLicJs_mLFwgaMIRRp_L77_2P?usp=sharing

2

I don’t know if this is the solution but, have you tried calibrating the ESCs individually, connected directly to the Rx to confirm it has learned your system’s end points?

Good luck.

3

Thanks for the reply, they’re calibrated, but the motors still jump to a high hover thrust.

4

These are probably reversed:
Q_M_SPIN_ARM,0.1
Q_M_SPIN_MIN,0.05
and this is way too high:
Q_M_THST_HOVER,0.35 - try 0.15 and it will eventually learn a new value if you can get relatively stable hover.
and I think you need to add a bit of dummy payload as it seems very overpowered at this stage.

I’d probably reduce Q_A_ACCEL_P_MAX and Q_A_ACCEL_R_MAX to half their present value, slow things down a bit.

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5

Thank you so much! I did change the values and it works a lot better. Here’s a video

6

Saw your youtube video too, nice :slight_smile:

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