Serious Problem in the current beta MP

I was having many problems with 3.1.11 MP release. So, rather stupidly, I updated to the latest beta. Most of my prior issues were gone, good.

I do a pre-launch calibration after the accels and barometer have warmed up. I took off (fixed wing) went to Auto and noticed the plane was in a constant roll of +12 degrees! I RTL'd. When I got home I tried to figure out what went wrong. After a couple hours, I quite accidentley found that doing the pre-flight calibration had set "level" for the plane. Well my plane was not level but that's where the IMU thought level was.

Beware if you use the pre-flight cal.

Steven

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • The ft is meters bug bit me too. Luckily I started questioning the giant WP Radius rings before I climbed too high.
    Thanks for the heads up on the preflight calibration change. I don't know the reason for such a change. I use preflight calibration before every flight, I certainly can't be trying to keep the plane level. I can't imagine this is a bug, it must be intentional. There is a parameter that might help. It's called SKIP_GYRO_CAL.

    Steve, you should be reporting these bugs on github so they are tracked.
    Thanks again.
    • Yes, I keep forgetting about github but sometimes when I post a problem or ask for help, it gets ignored. Here there seems to be more help.

      btw, MP 1.3.12 was released and it guess what, "flightdata: PREFLIGHT_CALIBRATION do gyro cal as well". I haven't tested it yet but this could very well mean preflight cal sets a new "level". I don't really agree that this is a good thing.

      Steven

      • Okay, I just confirmed that using preflight calibration in 1.3.12 will reset "level". IMO, this is a really bad idea. Maybe I'm missing something???

  • So Steve - for those of us who launch with a catapult launcher, this can be a serious problem.  Thanks again.

  • Hi Steven:

    Thank you for the post.  I too had issues with 1.2.11 Mission Planner.  The problem I encountered was the fact that instead of flying at the designated 400 feet AGL, it flew to 1,300 feet!

    I have since updated to 1.3.12 and will check test it out this afternoon.

    Thanks

    Bret

    • Yep, I had that too but I knew what it was since I had the same issue on a prior MP update. The update defaulted you to meters! Guess what 3.28 x 400 is? :-))

This reply was deleted.

Activity

DIY Robocars via Twitter
RT @a1k0n: Did I get rid of hand-tuned parameters? Yes. Am I still hand-tuning more parameters? Also yes. I have a few knobs to address the…
Monday
DIY Robocars via Twitter
RT @a1k0n: I'm not going to spoil it, but (after charging the battery) this works way better than it has any right to. The car is now faste…
Monday
DIY Robocars via Twitter
RT @a1k0n: Decided to just see what happens if I run the sim-trained neural net on the car, with some safety rails around max throttle slew…
Monday
DIY Robocars via Twitter
Sep 24
DIY Robocars via Twitter
RT @SmallpixelCar: @a1k0n @diyrobocars I learned from this. This is my speed profile. Looks like I am too conservative on the right side of…
Sep 24
DIY Robocars via Twitter
RT @a1k0n: @SmallpixelCar @diyrobocars Dot color is speed; brighter is faster. Yeah, it has less room to explore in the tighter part, and t…
Sep 24
DIY Robocars via Twitter
RT @a1k0n: I'm gonna try to do proper offline reinforcement learning for @diyrobocars and throw away all my manual parameter tuning for the…
Sep 23
DIY Robocars via Twitter
RT @circuitlaunch: DIY Robocars & Brazilian BBQ - Sat 10/1. Our track combines hairpin curves with an intersection for max danger. Take tha…
Sep 22
DIY Robocars via Twitter
RT @SmallpixelCar: Had an great test today on @RAMS_RC_Club track. However the car starts to drift at 40mph. Some experts recommended to ch…
Sep 11
DIY Robocars via Twitter
RT @gclue_akira: 世界最速 チームtamiyaのaiカー https://t.co/1Qq2zOeftG
Sep 10
DIY Robocars via Twitter
RT @DanielChiaJH: Always a good time working on my @diyrobocars car at @circuitlaunch. Still got some work to do if I’m to beat @a1k0n howe…
Sep 10
DIY Robocars via Twitter
RT @SmallpixelCar: My new speed profile for @RAMS_RC_Club track https://t.co/RtLb7TcgIJ
Sep 10
DIY Robocars via Twitter
RT @SmallpixelCar: Practiced at @RAMS_RC_Club today with my new @ARRMARC car https://t.co/AEu2hCx89T
Aug 28
DIY Robocars via Twitter
Aug 24
DIY Robocars via Twitter
RT @gclue_akira: 柏の葉で走行させてるjetracerの中身 #instantNeRF #jetracer https://t.co/giVvuE4hP7
Jul 4
DIY Robocars via Twitter
Cool web-based self-driving simulator. Click save when the AI does the right thing https://github.com/pncsoares/self-driving-car
Jul 4
More…