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Randy
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  • Tokyo
  • Japan
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  • Inertial Stability Systems
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  • Alex Black
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  • Mike Yan
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Randy's Groups

Randy's Discussions

PixRacer with Ardupilot

Started this discussion. Last reply by Francisco Ferreira Sep 13. 1155 Replies

Ardupilot on QC Snapdragon

Started this discussion. Last reply by David Ahlgren Aug 15. 7 Replies

Pixhawk 1MB flash limit

Started this discussion. Last reply by Mark Brummett May 11. 85 Replies

 

Welcome, Randy!

Latest Activity

Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
"Hi Leonard, Maybe starting with a better manual tune would help.  I saw somewhere (youtube) that you stated by putting D on a rotary know and adjusting until an oscillation.  Then the same for P (I=P) and finally stabilize.  I…"
yesterday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
"You saw the picture of this X8?  Pretty frustrating working with this the last few days, but that made me laugh.  Image that spinning around all angry on a rope lol! "
Friday
George Roberts replied to Randy's discussion AC-3.1 autotune support discussion
"Note that you can also get the tune values from the log file from an incomplete autocal. Note also you can tie up your quad so it can only rotate on one axis and can't hit anything and adjust parameters that way."
Friday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
"Went out again for another AT, but this time at .05 aggr setting.  Not very good.  hovers ok, but start moving and it get pretty unstable.  During the AT near the end of the pitch step it lost control for a bit but recovered. Log…"
Friday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
"Here's the two autotune attempts.  The first one seems to go ok, but with these pid's it still flies like a dog lol.  The second attempt simply wouldn't start.  Never had that happen…"
Friday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
"Hi Leonard, Here's the link: https://www.dropbox.com/s/tnluc96109zprzy/2016-09-22%2017-52-09.bin?dl=0 Tuning is pretty crazy.  A lot of pitching in forward flight.  Enough to almost send it to the ground but it recovered later in the…"
Friday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
" "
Friday

Developer
leonardthall replied to Randy's discussion AC-3.1 autotune support discussion
"Hi Shaun, Could you do a 4 minute flight with the Log Bit Mask of : 786429 Could you make sure you have a fast SD card in the pixhawk. (like as fast as you can get) Just a Stabilize for the first minute Alt Hold for the second minute Loiter for…"
Thursday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
"Thanks Leonard!  I'm your guy for test big copters and AT lol!"
Wednesday

Developer
leonardthall replied to Randy's discussion AC-3.1 autotune support discussion
"Hi Shaun, I will take a look tonight. "
Wednesday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
" "
Wednesday
Shaun Bell replied to Randy's discussion AC-3.1 autotune support discussion
"Bigger the rig, the crazier to autotune?  Well, setting the filter to 10hz and aggr to .1 worked really well on the 960mm X8 and the 960mm HEX.  Not so good with my 1300mm X8.  Started out fine, but after about 6min the roll inputs…"
Wednesday
Francisco Ferreira replied to Randy's discussion PixRacer with Ardupilot
"3.4-rc5 will bring this improvement for the clones. To know when it happens you should be at http://discuss.ardupilot.org"
Sep 13
Nico D replied to Randy's discussion PixRacer with Ardupilot
"So I also got stuck with a clone board. Been trying to order one from AUAV but they're out, thought i'd check out the clone and see how it worked. So i found out that with 3.3.4 it works, but loading 3.4-rc4 from "beta…"
Sep 13

Developer
Randy replied to Tony Kenward's discussion Leddar One optical range-finder support coming to ArduPilot? in the group ArduCopter User Group
"In an interesting turn, a pull-request has come in for the LeddarOne.  I think it's a new effort, separate from what Anton has done above.  Not sure if I'm being cheeky or not but maybe Anton could look over this PR? …"
Sep 12
lianpinkoh commented on Randy's blog post AntennaTracker v1.0 on NAVIO2 with Bebop2
"@Randy, here's an update on my tracker. All the mechanics and electronics are set up (using a bridging 3DR radio to GCS). I'm having trouble with the tuning. Any chance you are willing to share your parameters? Video of tracker "
Sep 10

Profile Information

About Me:
Lead developer of ArduCopter. I coordinate releases, provide support for users having trouble with their copters, add new features (most often based on ideas and suggestions from the community). I also help others get their code integrated into ArduCopter.

You can find numerous video tutorials from me here: https://www.youtube.com/user/rmackay9/videos

facebook: https://www.facebook.com/groups/ArduPilot.org/
gitter: https://gitter.im/ArduPilot/ardupilot/
Please tell us a bit about your UAV interest
Interested in quads and helis mostly. I got my start in this field by reading the electronics tutorials from Sparkfun and from watching the success of Jack Crossfire's vicacopter. I've learned an enormous amount from the combined wisdom of the people on the DIYDrones forums and members of the core dev team including Jason Short, Tridge, Doug Weibel, Leonard and many more.
Hometown:
Karuizawa, Japan

Randy's Photos

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Randy's Blog

Copter-3.4's polygon fence

Posted on August 16, 2016 at 6:12am 2 Comments

One of the more important features that will arrive with Copter-3.4 (still in beta testing) is the Polygon Fence (the full list of features can be seen in the …

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AntennaTracker v1.0 on NAVIO2 with Bebop2

Posted on July 28, 2016 at 2:07am 28 Comments

ArduPilot's Antenna Tracker firmware has been making some quiet progress over the past few months.  They're all documented in the …

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Copter-3.4 beta testing starts

Posted on May 30, 2016 at 10:30pm 22 Comments

Copter-3.4-rc1 has been released for beta testing and can be downloaded using the Mission Planner's Install Firmware screen's beta firmware link.  Some of the changes since Copter-3.3.3 are listed below.

1) EKF2 allows "boat mode" (attitude initialisation without gyro calibration)

2) …

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Terrain Following Missions using Lidar

Posted on May 13, 2016 at 11:30pm 24 Comments

The upcoming Copter-3.4 release will include terrain following support for mission commands using either Google earth altitude data or a Laser Range Finder.  This is a demonstration video shot at a ski hill near my home in Karuizawa Japan of this new feature.

For this test I used a venerable 3DR IRIS with a …

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Copter-3.3 released!

Posted on October 8, 2015 at 9:58pm 84 Comments

After months of testing by the beta-testing team and no significant issue during the soft release, Copter-3.3 has been released.  You can load this version onto your vehicle using the…

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Comment Wall (33 comments)

At 8:44am on January 5, 2011, Jack said…

Randy

I have been working on my own Quad with the NG code and have setup the Sonar and have it working very well . I have an indoor version with sonar and IR sensors and would like to know were the IR sensors are conected, what pins. I see you were working on implementing this so If you could help with basic setup I can try my hand at testing. Thanks for your work on the Sonar and good luck on the obstical avoidence.

Jack 

At 5:47am on January 30, 2011, Kári Davíðsson said…

Thanks Randy. 

I do not have write access to the svn repository.

So I will send you the changed AP_ADC lib probably later today.

I am not sure if a circular buffer is needed. The beauty of a 1st order IIR filter is that we only need one "old" sample and if a second order is needed only two old samples. But I will look a little better into the filter selection before committing anything to you.

At 5:45am on August 24, 2011, Jiro Hattori said…

Hi Randy

 One of the way to introduce technology of arduino as IMU is that something like what you have done. Most of the Japanese model flyer love to fly traditional helicopter. 

 Another approach may be exhibit something very unique at MAKE fair at Tokyo Institute of Technology.  There will be many open source hardware and software freaks as well.

At 9:10pm on March 7, 2012, Ravi said…

hi randy, i had been following your forum for align450. i just got my APM2 purple. i loaded the ardu heli firmware. everythings looks to be ok on mission planner. but there is no PWM on servo out pins. i armed the APM2 and does gets armed. the radio callibration bars move proportionately. evrything seems to be OK. but in 'status' there is no PWM on channel out pins. it shows '0' PWM on all out channels. can uou please suggets what might be the reason. the APM2 works fine with arduplane and arduquad firmware. ravi

At 5:53am on March 16, 2012,
T3
Aerhead
said…

Randy

I had a different problem with my APM2 that I was able to solve by following the procedure found in the wiki with a search for APM board problems.  My board would not connect to the planner and it works now.

Good luck

Larry

At 2:18pm on May 15, 2012, wilson javier madrid sossa said…

hello hello hug.
I can help with anything, I did several plannings flight with tri and firmware 2.0.49 and flew very well.
I did a quad and install 2.5.4 program a waypoint flight and the team took off like crazy.WP PIDs are by default and does not really move as you do. can you give me some information.

I appreciate your help

At 4:41pm on May 16, 2012, wilson javier madrid sossa said…

Please can you help me. I was flying my quadcopter and hold position when you turn the team went to ground. these are the last two log. I appreciateprompt help.

2012-05-16%2018-12-25.tlog

At 3:54pm on September 29, 2012, Marooned said…

Hi Randy

After your changes to Optical Flow I'm having troubles with compiling the sources:

ArduCopter.cpp: In function 'void init_ardupilot()':
ArduCopter.pde:-1: error: 'SPI3' was not declared in this scope
ArduCopter.pde:-1: error: 'SPI3_SPEED_2MHZ' was not declared in this scope

I have spi3.h file include in ArduCopter.pde but somehow it's not working that way. I did fetch&rebase with original repo.

At 3:12pm on September 30, 2012, Marooned said…

Sorry for troubles. It's working now. Looks like Arduino IDE had some hiccup.

I should probably move to some better IDE as I'm using Arduino only for compiling/uploading and all files are edited in my fav editor and I have to restart Arduino every time I change something as it doesn't follow outside files changes.

Anyway, sorry for bothering you.

At 6:30pm on December 1, 2012,
T3
William Premerlani
said…

Hi Randy,

Regarding a question that Shyam asked about gimbal lock when he was trying to use APM to stabilize a camera, he and I finally solved the issue. Here is a link.

No one on diydrones was able to help Shyam, he finally contacted me directly.

Best regards,

Bill Premerlani

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