Slapped together a factory-fresh mini hex with HK APM mini + 3DR ublox, balanced the props, fired it up in the air and ran autotune, in a breezy day. Over tuned with the factory settings, but flying ok now - just needs a tweak here and there.
This is the result. Needs bit of D I think, to stablise it a bit. Maybe more aggressive control in pitch to stop the high frequency oscillations?
Will upload settings once I get home. 3.2rc7, factory fresh build.
Comments
Been trying to tune mine out with PID and STAB_x, to some effect - but bumping the hz to 98 has had the most effect. It's still there, but is only audible now. No visible oscillating. I will use this 98 as the base for PID and tune from there.
Hmm - the 2150 "baby beast" multistars I have are running very well - on 3S, with a 900g weight and 5030 props they barely get warm, even in 25'c and after multiple packs. The 1704's are an older design, I believe.
Interestingly, I'm still getting some "flutter" on Pitch at higher speeds. I need to try and tune P and D, I think.
I also get "warbling" from the motors in a full power climb.
What's misbehaving? What are you flying?
Hi DB,
- Multistar 2150's...the "mini beasts"
- AUW is 900g with a 2500mah 3S; less with a 1800mah.
- Flight time is around 8 minutes; I might go to 5040 or 6030 props to increase this.
- hovers at around 54%, according to APM's parameter. This is with 2600mah though - a 1800 or 2200 is the optimal.
Because Switzerland.
Porn!
Settings after autotune. I think it needs a tweak, but it flies.
come on you know we just want to see pictures of the copter ;)
Yeah, I guess I can. Will be a few days until I get more air time.
I'll be uploading PIDs and pictures shortly.
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