CloudFlyer
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Arducopter 3.4.4 (PixHawk) bugs in altitude or yaw controllers?

Started on Wednesday 0 Replies

Arducopter 3.4.4 (PixHawk) bugs in altitude or yaw controllers?So I've been using copter 3.4.4 since January2017  and have had this mystery problem the entire time with the drone descending at random…Continue

Tags: X8, Drone, PixHawk, NKF3.IYAW, 3.4.4

PixHawk Drone keeps descending and we don’t know why

Started this discussion. Last reply by CloudFlyer on Tuesday. 26 Replies

So I made a drone since I’ve made other RC models before, and I’ve been learning about all the extra things that go along with drones. Such as the extra sensors, computer and software and firmware.I…Continue

 

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CloudFlyer posted a discussion

Arducopter 3.4.4 (PixHawk) bugs in altitude or yaw controllers?

Arducopter 3.4.4 (PixHawk) bugs in altitude or yaw controllers?So I've been using copter 3.4.4 since January2017  and have had this mystery problem the entire time with the drone descending at random after being completely stable for 5 to 8 minutes.Learning the meanings of the readouts in DataLogs has been difficult because 1. I can't seem to find a list of descriptions or explanations (That really makes good sense)2. The readout names aren't exactly like the parameter names that effect them3.…See More
Wednesday
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"On flights where the drone does not have uncontrolled descents, IYAW is NOT doing these square edges.What is IYAW please? What effects it?"
Tuesday
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"I have just found this on herehttp://ardupilot.org/dev/docs/extended-kalman-filter.html#extended-kalman-filter-interpreting-log-data(Am I right in thinking please an awful lot of the parameter names and locations in the Arducopter documents are no…"
Tuesday
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"A new (and small) datalog attached.I'm wondering what's causing the ATT.YAW edges.Is this the EKF_MAG_CAL Mode? It's set to "After first climb and yaw"And I can see in the Log EKF3-IMX, IMY and IMZ are flat then go busy at…"
Tuesday
CloudFlyer replied to Andrew A's discussion What do the acronyms AHRS, AHR2 and CTUN stand for?
"Attitude, Heading (or Height I'm not sure) Reference System....I'm looking for what CTUN means :)"
Mar 13
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Reading this on the PX4 websitehttp://px4.io/docs/multicopter-pid-tuning-guide/ I am looking for parameters for motor band limiting.I'm not sure if the below paragraph means it's something that canbe adjusted, or if it's something…"
Mar 10
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Hi Andre, that's excellent thanks - I had thought of that one :)  Maybe it's a case of trying other propellers. Or spinning them faster. The motors get to their maximum rpm, and the PWM at 250us is topped-out. The motors etc are using…"
Mar 9
Andre K. replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"it's diverging is linked to the motor maxing out, one part is underperforming, to maintain attitude, the others need to perform less...   then, at some time the total thrust is less that what's required to maintain altitude.  "
Mar 8
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Ok so I need to sign-up to a google drive. (I will thanks)I completely understand that it's guesswork without the info the datalogs provide. But in my previous post I was simply asking if anyone recognised, or knew why the PWMs were diverging?I…"
Mar 7
Andre K. replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"share it from drive.google.com or any other service - there are hundreds.."
Mar 1
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"The .Bin file is 64.8Mb so too large to upload here.Is there a way to cut it up or upload it somewhere else?"
Mar 1
Andre K. replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"it sinks probably due to a local gravity anomaly. would you like more wild guesses ? or prefer to post logs ?  :)"
Feb 28
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"I got the SD card working (Thank you) by formatting it and trying different Log bitmasks because some seemed unstable. I also got the attitude to be stable with good control response by manually tuning. Now the only real problem the drone has, is…"
Feb 28
Andre K. replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"no, usually , you should have seen the folders be created, log started, it's common for it to abruptly stop logging on power loss. (and the logs are always useful until the last <second.)"
Jan 10
CloudFlyer replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"Thanks Again Andre! The Bitmask, I've been looking at Logs on the Parameter List I just wasn't clear on what was being called a sync issue. I have not seen any sync issues from bench testing. Can a faulty power module cause DataFlash Logs…"
Jan 10
Andre K. replied to CloudFlyer's discussion PixHawk Drone keeps descending and we don’t know why
"for bitmask : use http://ardupilot.org/copter/docs/parameters.html , calculate the bitmask from that info if you are using current AC build. Sync issues is something you can hear, sometimes smell :) , google it - watch youtube for examples - you…"
Jan 10

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