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Randy's Groups

Randy's Discussions

figuring out the Antenna Tracker

Started this discussion. Last reply by iskess yesterday. 32 Replies

ArduCopter-3.2 beta testing

Started this discussion. Last reply by Andre 2 minutes ago. 1951 Replies

ArduCopter-3.1 released!

Started this discussion. Last reply by dindong dantes on Friday. 1521 Replies

 

Welcome, Randy!

Latest Activity

Andre replied to Randy's discussion ArduCopter-3.2 beta testing
"Here I like to show what I mean with moving during Landingphase. But in this example it is much better than with more wind in the afternoon. Here the Link :http://youtu.be/PP59IyPdHBU"
2 minutes ago

Developer
Rob_Lefebvre replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi Ray, Yes, there's significant difference on Tradheli dynamics.  The AHRS_ACCEL parameters allow you to soften the control inputs.  I would suggest you try 72000 for both RP and Yaw on your larger machine.  I'm running…"
3 hours ago

T3
Thorsten replied to Randy's discussion ArduCopter-3.2 beta testing
"Randy, I made several further tests and the landing is fine. However, I had no Movement after touchdown as reported by Andre. Andre, can you explain a little more what you mean with "movement"? Regards, Thorsten"
3 hours ago
Ray Gamero replied to Randy's discussion ArduCopter-3.2 beta testing
"I finally got a satisfactory flight on 3.2 with my trad heli (TREX 550).  It's really promising. Fully auto flight from takeoff to land.  The flight control now is rock solid.  Landing is sweet.  Is this an updated…"
3 hours ago
Andre replied to Randy's discussion ArduCopter-3.2 beta testing
"Hi Randy, I tested your landing detector from above. The landing is much better with nearly no movement after touchdown and quick Motor shut off, if the Copter does not move when it touch the ground.. But if the Vehicle touches with movement, the…"
4 hours ago
Masafumi Miwa commented on Randy's group Japan ArduCopter Group
"APM2.6のプログラミングですが、ArduinoをGCCが4.8.2の奴に変更したら、コンパイル後に25k以上の空きができるようになりました。 SCなんかも、APM:Copter側にソフトで内蔵できそうです。"
4 hours ago
Masafumi Miwa commented on Randy's group Japan ArduCopter Group
"こちらです。 APM:Copterのカメラシャッターをつかってます。 http://youtu.be/dwj-DtHPVQQ IR,いいですね、それでいこうかな。 "
4 hours ago
OwlPic replied to Randy's discussion ArduCopter-3.2 beta testing
"Is there a better place to discuss this? Like to hear your thinking and explain mine."
4 hours ago
Richard Kennedy replied to Randy's discussion ArduCopter-3.2 beta testing
"No.. as luck would have it that very last flight I didn't bother connecting :[ Another thing I'm not doing again. "
5 hours ago
Jiro Hattori commented on Randy's group Japan ArduCopter Group
"PETボトルの保持とリリースは、サーボでしょうか? 水上の人間は、IRカメラで認識できそうですが。。 "
5 hours ago
Rainer K. replied to Randy's discussion ArduCopter-3.2 beta testing
"Hello Ravi I use a few years Simon K. I have never had a problem. No sync problems on disk motors. Please check the connection cable with disc motors. this go easily broken by the vibration."
5 hours ago
Ravi replied to Randy's discussion ArduCopter-3.2 beta testing
"hi fellow dronors, some of those motor glitches could be because of motor and not because of SimonK ESCs. i wasted two months just trying to eliminate the  sync issue. finally found that one of the brand new motors was glitching most probably…"
6 hours ago
Masafumi Miwa commented on Randy's group Japan ArduCopter Group
"救難活動をモデルとしたペットボトルの投下実験をしました。機体はRapid X650をベースとした空中台車。FCはAPM2.6にAPM:Copter3.2rc9を改造してAlt_Holdでの自動離陸を追加したソフト。SimpleモードのAlt_HoldとPosition_HoldをベースにSCで操作しているので、途中でのマニュアル操作での微調整が可能です。 FCを制御するSC(シーケンスコントローラ)にAPM2.0。SCは起動・自動離陸開始・自動航行開始・ペットボトル投下&帰還開始、自動着陸開始を…"
6 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"When it comes to high precision GPS, my hopes are with Piksi.  There is some support in ardupilot for it already although I've never used it and can't vouch on it's performance."
8 hours ago
Andre replied to Randy's discussion ArduCopter-3.2 beta testing
"what you mean is D-GPS. I´m trying to do so but with low cost GPS it it very difficult. Please google RTKLIB"
8 hours ago

Developer
Randy replied to Randy's discussion ArduCopter-3.2 beta testing
"Andre, An octacopter and Y6 will fly without skipping a beat even with one motor failed.  A hexacopter may survive but as a minimum it will lose yaw control and it might flip and crash to it's death.  There's some discussion in…"
10 hours ago

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: http://www.youtube.com/channel/UCm393BzMOyRPUo8MtKp5alg
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

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Randy's Blog

Red Balloon Finder

Posted on June 17, 2014 at 5:04am 30 Comments

As many probably know, this year's Sparkfun Autonomous Vehicle Competition (AVC) is similar to last year's except that a new challenge has…

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GPS Glitch detection in AC3.1

Posted on December 14, 2013 at 6:42am 32 Comments

AC3.1 is going out very soon and includes a new safety feature called GPS glitch detection.  There's a wiki page about it but I'd like to highlight how it works because it's near the top of the list of safety issues.  The method…

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Dropping a Rover from Hexacopter - Part III

Posted on August 22, 2013 at 7:40pm 32 Comments

As a follow-up to the rover drops #1 and #2 I spent a day with Assistant Professor Nagatani-san of…

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UAVs for measuring radiation levels in Japan

Posted on April 11, 2013 at 6:38pm 11 Comments

Two years after the March 11th tsunami in Japan that triggered the Nuclear disaster at the Fukushima power plant, there are still just over 300 thousand people who have not been able to return to their homes due to…

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Dropping a Rover from Hexacopter - Part II

Posted on March 15, 2013 at 12:32am 14 Comments

As a follow up to an indoor test we did a about a month ago (blog post here), Assistant Professor Nagatani-san of Tohoku University, Izu-san of…

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Comment Wall (23 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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