Chris Pitts
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  • Pipe Creek, TX
  • United States
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Chris Pitts's Groups

Chris Pitts's Discussions

Can ArduPilot be managed to comply with DO-178C?

Started this discussion. Last reply by Boston UAV Nov 15, 2012. 19 Replies

With full commercial integration of UAS on the horizon for 2015, open-source projects like ours have the potential to erradicate barriers to entry into the UAS marketplace.The regulations involved…Continue

Stupid noob question, but I need help quick!

Started this discussion. Last reply by Chris Pitts Oct 31, 2012. 4 Replies

Sorry for not RTFM'ing this, but I actually have an urgent need for a piece of info that I can't seem to find. I demo my fuzzy controller to one of my professors in an hour, and I haven't figured out…Continue

Lost throttle control on landing and broke my skids. Any tips?

Started this discussion. Last reply by Chris Pitts Oct 24, 2012. 2 Replies

Hi guys,I'm kind of a noob with RC helis in general, so I'm making some noob mistakes and breaking stuff that I probably shouldn't be having a problem with.Today, I was doing some flying on my TREX…Continue

Moving to a flybarred Raptor 90 from my TREX 450 FBL.

Started this discussion. Last reply by Chris Pitts Nov 1, 2012. 20 Replies

I'm moving from my flybarless TREX 45 to a Raptor 90 SE with a flybar soon. I heard that control for roll and pitch is rate based, and we have full acro control, but does stabilize mode also…Continue

 

Chris Pitts's Page

Latest Activity

Henry Bradlow replied to Chris Pitts's discussion PandaBoard
"Hi Chris, How is this project progressing? Is the project open source and available somewhere? I am a student at UC Berkeley and I am building a quadcopter based on the pandaboard. Best regards, Henry"
Jan 30

Developer
Rob_Lefebvre replied to Chris Pitts's discussion How to tune a rate PID
"No, there's no relationship like that that could be stated.  For Helis on APM, the I should be pretty much equal to P, and D should be Zero."
Dec 1, 2013
mP1 replied to Chris Pitts's discussion How to tune a rate PID
"Generally whats the ratio relationship between the three values P , I and D for an average (if that makes any sense at all). Is it fair to say P > I > D  is there are ratio between them like P = ~ 2I = ~4 D ?"
Nov 26, 2013
Steve Ross replied to Chris Pitts's discussion TREX 450 pro with flybarless 3GX Module in the group ArduCopter (traditional heli) user group
"Chris,      I am in the process of building the T-Rex 450 Pro V2 3GX and facing the same problem you had on how to mount the APM 2.5 module to the heli. I guess you have resolved the problem long time ago, could you please tell…"
Jul 16, 2013
Boston UAV replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"Yes, yes, yes, correct - they would have to make it available, correct - they cannot close-source any subset or superset, yes it violates GPL. I think I answered in order :)"
Nov 15, 2012
Boston UAV replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"There is alot of correct and incorrect information in this thread. First: DO-254 = Hardware DO-178C = Software I can speak for the software side of things from experience, hardware is not my expertise. To clarify some points: Certification Both…"
Nov 15, 2012
Chris Pitts replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"I agree that making money based solely on the software would not be kosher. My thought was questioning what would happen when the user that went through the certification process shared the certified code. If that certification didn't transfer…"
Nov 15, 2012
Stephen R Mann replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"No, it's not fair and sometimes really pisses off the Open Source community.  Which is why the Acme UAV company would be very wise to return new code to the community following the open source practice. But, it's going to cost a lot…"
Nov 15, 2012

Developer
Rob_Lefebvre replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"Chris, but this is a VERY grey area. IMO, that scenario should not be allowed.  As I see it, the Ardupilot/copter code is worth somewhere upwards of $1,000,000.  I dunno, maybe that's over the top but, I look at it as 10-20,000 at…"
Nov 15, 2012
Chris Pitts replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"This has been a really educational experience for me. Thanks to Stephen and Chris A. for coming in and setting the record straight. So the way I understand this now, is that anyone can come in and grab the code, run it through the certification…"
Nov 15, 2012
Stephen R Mann replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"As I said before, and Chris Anderson could comment on this, Open Source is a cooperative community and does not have force of law. So, yes, it's against the rules, but only community pressure can force cooperation. "
Nov 15, 2012

Admin
Gary Mortimer replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"The thing is might become a requirement, not optional to have DO or STANAG systems. It will certainly knock the Chinese APs for six. Thankfully in Europe they have not gone for it yet, but they don't have the major sUAS defence manufacturer…"
Nov 15, 2012
Stephen R Mann replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"Interesting that RedHat was mentioned as an example.  RedHat supports and encourages open source community, but to defend their users, they do patent any code RedHat generates.  (See Patent Promise). But, that's getting off topic.…"
Nov 15, 2012

Developer
Rob_Lefebvre replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"If somebody did that, certified a version of the Arducopter for example, wouldn't that meant that we would all benefit from the certification?  We could all use that certified code? Or, if they took a version of the code, changed…"
Nov 15, 2012
Chris Pitts replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"That's interesting. What happens to any modifications the user makes? Are those users compelled to release their source code as well, or are they allowed to keep any IP they create using it proprietary? That's something I'm not up to…"
Nov 15, 2012

3D Robotics
Chris Anderson replied to Chris Pitts's discussion Can ArduPilot be managed to comply with DO-178C?
"Interesting discussion; thanks for starting it.  The way we work on the software side (ArduCopter, ArduPlane, ArduRover, Mission Planner, etc) is like Linux. Volunteer developers write code and release it on the Internet for free,…"
Nov 15, 2012

Profile Information

About Me:
I'm a controls engineering student at the University of Texas at San Antonio.
Please tell us a bit about your UAV interest
I'm developing a fuzzy logic controller for a traditional heli. Arducopter is looking particularly appealing because it solves most of the problems of systems integration up front. I'm looking to contribute to the code by adding a fuzzy feedback controller as a substitute for PID, and I hope to contribute where I can in getting HIL simulation working for traditional helis.
Hometown:
San Antonio, TX

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