About

Gender

Male


Location

Avignon


Please tell us a bit about your UAV interest

Quad with APM 2.5 / PixHawk


Hometown:

Avignon


Activity Feed

Julien Dubois replied to Christopher Gehrich's discussion Pixhawk with SONAR Vertical Drift in Alt-Hold in ArduCopter User Group
"Your log show STABILIZE and LAND modes.
Stabilize do not use Sonar because it does not control altitude. it's direct throttle control, that's why the copter behaves as you describe.

You should try Alt_hold, loiter or poshold flight modes

BTW, sona…"
May 8, 2015
Julien Dubois replied to Christopher Gehrich's discussion Pixhawk with SONAR Vertical Drift in Alt-Hold in ArduCopter User Group
"Please post the .log file so we can have a look"
May 8, 2015
Julien Dubois commented on benbojangles's blog post DIY Ghetto Mapping Project
"Hi ben, thaks for reply.
I did a quick test with Agisoft trial some weeks ago, with just 90 images of a 5 hectare area, with no GPS geotag.
And the software was able to make a 3D model of the zone, not very accurate due to few raw data but the featu…"
Apr 23, 2015
Julien Dubois commented on benbojangles's blog post DIY Ghetto Mapping Project
"Great job and blog post!
Do you think it's possible to extract images from a video?"
Apr 23, 2015
Julien Dubois commented on Chris Anderson's blog post Drone vs Drone: "Net cannon" copter captures another
"Not very safe, I thought they would at least retain the fillet and release it once on the ground.
Even if the huntscopter has not enough payload to retain completelly, as least it can lower the fall. once descent terminated, release the cable...
The…"
Mar 18, 2015
Julien Dubois commented on Greg Dronsky's blog post Pixhawk powered Star Wars Speeder Bike Quadcopter
"Love it, well done!!!
Standard copter are so ugly, common and uninteresting... your design brings a real interest in flying it even if performances are less."
Mar 14, 2015
Julien Dubois commented on Phenox Lab's blog post Zynq based on-board and fully autonomous palm-sized quadcopter
"Great hardware, sounds promising!
Would be even better if the I/O could be more standart and allow integration of your board in any copter. Escially the RCOUT PWM for ESC instead of embedded ESC."
Mar 14, 2015
Julien Dubois commented on Janis Kuze's blog post How to configure and use Ardupilot simulator (SITL) with UgCS
"Thanks!
Should be added to the wiki"
Mar 12, 2015
Julien Dubois commented on Chris Anderson's blog post Sense and Avoid "eBumper" available for IRIS+
"not tilt compensated, short range, easily disturbed... that solution is basically the easiest one we could find and obviously not the best, pretty useless imo."
Mar 12, 2015
Julien Dubois replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"stone, I don't think as that kind of grounding is only usefull for low frequencies.
High frequencies require complete shielding. exemple here chap 3.6
http://www.schneider-electric.com.au/documents/electrical-distribut...
what you suggest would be t…"
Mar 10, 2015
Julien Dubois commented on DAS Lab's blog post SWIFT Propolsion unit 1st test
"Interesting and compact design, just some thoughts:
- the battery and ESC inside the tube will heat more, that could be an issue
- the arm with the battery opening will be weaker
- need to replace several batteries for example if used this concept f…"
Feb 28, 2015
Julien Dubois commented on Yan Ma's blog post Vision based upgrade for Aerial filmmakers
"Great job!!! seems you've outclassed http://hexoplus.com/"
Feb 24, 2015
Julien Dubois commented on Roberto Navoni's blog post VirtualRobotix VR Spark 350, the Italian answer to DJI Phantom . (it's compliant to the New EU/US regulation!)
"Thanks Emile and Roberto for details.
I can't believe a safety rule requires to stop the power in flight! I would have thought of a controlled or even uncontrolled landing (by reducing the throttle) but not just switching it off... more dangerous th…"
Feb 20, 2015
Julien Dubois commented on Roberto Navoni's blog post VirtualRobotix VR Spark 350, the Italian answer to DJI Phantom . (it's compliant to the New EU/US regulation!)
"Great job Roberto!
any idea of final price?
What do you mean by flight termination system?"
Feb 18, 2015
Julien Dubois replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"Sonar seems still enabled
https://github.com/diydrones/ardupilot/blob/master/ArduCopter/APM_C...
BTW, this is where you can enable/disable features and then compile the code yourself."
Feb 9, 2015
Julien Dubois replied to Randy's discussion ArduCopter-3.2.1 Beta Testing
"@Phanivyas,
That fix is just a timer adjustment that was too low for PixHawk but good for APM. As pixHawk is running 4 times faster, the timer was 4 times too low. Main effect would have been the copter computes the wind compensation as its attidue…"
Feb 5, 2015
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