Sriram
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  • Tamil nadu
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450Quad crashed in stabilize mode!!!

Started this discussion. Last reply by Sriram Feb 26. 4 Replies

Hay guys....                I was flying a 450quad with pixhawk3.3.3with vibration dampers, M8n gps, 3DR telemetry, BEC module and futaba transmitter. I had a clean fight in stabilize mode for about…Continue

Tags: crash, pixhawk

Quad flipped- pixhawk 3.3.3

Started this discussion. Last reply by Josh Dec 28, 2016. 4 Replies

Hi    I am using a pixhawk3.3.3 with a quad. yesterday I was flying in altitude hold mode, suddenly quad flipped and drown into a pond. I couldnt recover pixhawk, esc and battery. out of four motors…Continue

Tags: quad

bec module not working

Started Nov 28, 2016 0 Replies

I using 3dr clone bec module. I calibrated the bec module in initial setup, set measured voltage 12.3 after measuring the battery volt by a multimeter. after a flight, I found that the voltage does…Continue

GPS Switch primary to secondary

Started this discussion. Last reply by Sriram Oct 15, 2016. 2 Replies

HelloI am using Pixhawk AC3.3 and two ublox m8n gps (primary and secondary redundancy).   I am currently facing two problems with gps.1)  latitude and longitude for both gps mismatch nearly 4 to 5m…Continue

Tags: gps

 

Sriram's Page

Latest Activity

Sriram replied to Sriram's discussion Pixhawk Stability in the group PIXHAWK
"Thanks Vesselin Goranov... that a good idea, which I could try.... "
yesterday
Vesselin Goranov replied to Sriram's discussion Pixhawk Stability in the group PIXHAWK
"When I'm testing new drone, especially large one, always doing tethered flight tune. This ensures good stable flights, and no risk to break the new "bird". Moreover I'm living near the airport, where test flights are not…"
yesterday
Richard Kennedy replied to Sriram's discussion Pixhawk Stability in the group PIXHAWK
"I have noticed this myself. I don't know what it is but I swear it's not just my imagination. Perhaps the first flight the gps takes longer to acquire than subsequent flights. Or the compass when set to auto adjust or what is it?.... auto…"
Wednesday
Sriram replied to Sriram's discussion Pixhawk Stability in the group PIXHAWK
"Thanks Harry Courter.... Couple of months ago,we start with stabilize mode and change to pos hold or auto. But recent times starting with pos hold, which could take off with less jerk..... We have never flew with loiter mode.  Can you explain…"
Tuesday
Sriram replied to Sriram's discussion Pixhawk Stability in the group PIXHAWK
"Hay Philip... 3.3.3 firmware is working good. yet we had some crash with same firmware in auto flight mode and in stabilize mode, we have checked logs, don't know what could be the reason. For each firmware update there are lot of new…"
Tuesday
Harry Courter replied to Sriram's discussion Pixhawk Stability in the group PIXHAWK
"Your first flight was totally in "position hold" mode?  You need to start with stabilize mode, then move to alt hold mode, then to loiter.  Only in this order can you really judge performance. Until you succeed with completing…"
Monday

Developer
Philip replied to Sriram's discussion Pixhawk Stability in the group PIXHAWK
"first comment, why would you fly with 3.3? move to release, or 3.5RC2.  "
Monday
Sriram added a discussion to the group PIXHAWK
Thumbnail

Pixhawk Stability

Hay Guys... I am using Pixhawk with 3.3.3 quad. We use factory PID values. The first flight was in POS HOLD mode at an altitude of 7 meters. There was a slight wobble and jerk in the quad. We flew for about 4 mins. The next flight was the same POSHOLD mode but found the is slightly stable and jerk was reduced compared to the first flight. Then the third flight, We could see much difference from the first flight. The quad was even more stale and jerk was greatly reduced. For each flight we power…See More
Monday
Sriram replied to Sriram's discussion 450Quad crashed in stabilize mode!!!
"Hay  Mossbackfarm... I checked all the motors and escs. All are fine... I use vibration isolation for mounting the pixhawk. I even flew the same quad about five times before the crash (sixth flight crashed)"
Feb 26
Sriram replied to Sriram's discussion 450Quad crashed in stabilize mode!!!
"Hay  Michael Burmeister thanks for the reply.... I have attached the correct file... I could plot motor outputs (RCOUT)... I will also attach .log file  "I think it is possible to crash in Stabilize mode with version 3.3.3…"
Feb 26
Mossbackfarm replied to Sriram's discussion 450Quad crashed in stabilize mode!!!
"At 3:28:30, yaw starts picking up right after your vibrations start to spike after being good for the previous portions.  Check motor / esc?"
Feb 25
Michael Burmeister replied to Sriram's discussion 450Quad crashed in stabilize mode!!!
"This log shows a normal flight with no issues.  RCOUT is not logged which is needed when determining an issue with flight. I think it is possible to crash in Stabilize mode with version 3.3.3 do to over use of the GPS in this mode.  Later…"
Feb 24
Sriram posted a discussion

450Quad crashed in stabilize mode!!!

Hay guys....                I was flying a 450quad with pixhawk3.3.3with vibration dampers, M8n gps, 3DR telemetry, BEC module and futaba transmitter. I had a clean fight in stabilize mode for about 3mins and then quad suddenly yawed in counter clockwise direction for 3 times and fell into the ground.... from dataflash log, it showed EKF error... but I dont know what caused that error.... all the esc and motors are working fine. I dont think that prop could be damaged  or any other mechanical…See More
Feb 24
Sriram replied to Luc Maximilien's discussion Do-Set-Cam-Trigg-Dist wrong distance between photos in the group Terrain/Surface Mapping
"can you upload the log file..."
Feb 10
Sriram replied to Chris's discussion Explanation of GPS_NAVFILTER
"see page no 17,18.....  but I too use Airbone4G only"
Jan 17
Josh replied to Sriram's discussion Quad flipped- pixhawk 3.3.3
"I had a similar event about a month ago in Loiter mode (no pond though). Right rear shut off while hovering at about 2.5m and 4m in front of me. I saw the prop spin down as it was falling. It speared the ground straight on that arm. Only cost me the…"
Dec 28, 2016

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image processing via UAV
Hometown:
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