David Dewey
  • Male
  • Port Townsend, WA
  • United States
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Latest Activity

Brit Davis commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"This is fantastic. Thaks for your work on this. Looking forward to trying it in 3.2."
Mar 27
Kumaresan Gurusamy commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"thanks for the quick reply david. i'll try this on auruplane and get back to you for any clarifications."
Mar 14
David Dewey commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"Hi Kumaresan, I'm not familiar with the Arduplane code, but it seems like it should be possible. To see the changes that make up SplineNav you can go on GitHub and do a compare between SplineNav 0.4 and Arducopter 3.1. That will show you each…"
Mar 13
Kumaresan Gurusamy commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"hi david, really some nice work done. i'm using multiplex easystar + arduplane 2.68 for my work. can the spline navigation algorithm can be used in arduplane also ? i would really be excited to use it. is porting the changes from…"
Mar 13
Roger Clark commented on David Dewey's blog post ArduPhantom: APM ArduCopter in a DJI Phantom Airframe
"Thanks David."
Mar 11
David Dewey commented on David Dewey's blog post ArduPhantom: APM ArduCopter in a DJI Phantom Airframe
"Hi Roger, No, I did not calibrate the stock Phantom ESCs, the stock calibration seems to work fine. However you'll probably need to increase MOT_SPIN_ARMED and THR_MIN to something like 175 to 185. Regards, David "
Mar 10
Roger Clark commented on David Dewey's blog post ArduPhantom: APM ArduCopter in a DJI Phantom Airframe
"Hi, I've a question about ESC calibration... I'm considering mygrading my Phantrom 2 to use PixHawk, as I've had a lot of problems with the existing DJI electronics hardware. Because, the stock RC transmitter that came with my…"
Mar 8
David Dewey replied to mark's discussion How is this guy getting this FPV range/ battery time? in the group ArduCopter User Group
"Yes, I've seen plenty of videos already, it's what started this whole thread after all. Also, the problem I'm having is mainly behind trees; flying behind buildings isn't as bad."
Feb 20
David Dewey replied to mark's discussion How is this guy getting this FPV range/ battery time? in the group ArduCopter User Group
"I'm using Circular Wireless SPW12 antennas on both Tx and Rx. Unless I want to go far instead of flying around close to myself, then I use the Circular Wireless HELIAXIAL12 on the Rx side."
Feb 20
David Dewey replied to mark's discussion How is this guy getting this FPV range/ battery time? in the group ArduCopter User Group
"I guess it's possible, but considering that it works just fine behind small buildings and it works fine at large distances, I don't think it's a setup issue. The reason it doesn't work flying behind trees is that all the trunks…"
Feb 20
David Dewey replied to mark's discussion How is this guy getting this FPV range/ battery time? in the group ArduCopter User Group
"So I went ahead and got the latest 1000mW Lawmate 1.2 GHz transmitter and receiver. Through-trees performance is better than the RMRC equipment, and I also get an extra minute of flight time, since the tx only weighs 25 grams vs. RMRC's 72…"
Feb 20
David Dewey commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"Hi Zidlov. Great to hear about your SplineNav test. No, SplineNav doesn't affect the behavior of other flight modes, so it must be a separate issue."
Feb 17
Zidlov commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"Uploaded end tested it on a foldable h-frame "Alien Locust" from goodluckbuy. It uses 5010 630kv motors from rctimer and 12" Graupner props, both of which are balanced. Gave it a small mission around a group of trees with altitude…"
Feb 16
David Dewey commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"Well, it hasn't been tested on Pixhawk, but it should work. Let us know your results! "
Feb 16
Jeff P commented on David Dewey's blog post New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override
"David, will this .4 version work on the Pixhawk?  Thanks, Jeff"
Feb 16
David Dewey replied to mark's discussion How is this guy getting this FPV range/ battery time? in the group ArduCopter User Group
"If we double the power then range should be the original range times sqrt(2). But if we had a 10W tx we'd be increasing power by over ten times, so we should get over 3 times the range. Three times my current range sounds pretty good to me."
Feb 15

Profile Information

About Me:
My background and education is in software engineering. I'm also co-owner of a small business that does product development and manufacturing, global sourcing, and retail sales on Amazon.com.
Please tell us a bit about your UAV interest
I'm interested in software and hardware development for anything that flies.
Hometown:
Port Townsend

David Dewey's Blog

New SplineNav 0.3: Smoother Yaw, and Manual Yaw Override

Posted on October 30, 2013 at 4:30am 31 Comments

 

After a few months of hard work, SplineNav 0.3 is now ready to fly! This SplineNav release started with the goal of simply reducing the yaw jitter issues of SplineNav 0.2, but in the end it turned into a major rewrite of the code.

 

New Features:

 

  • Smoother Yaw: Updates x and y spline derivative calculations faster, in a separate loop, for a more precise yaw control. Uses a fast…
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New SplineNav Version 0.2 on a 63 km/h Tour of Chinese Lotus Pond

Posted on July 19, 2013 at 3:52am 33 Comments



I've now finished coding up SplineNav version 0.2. It's almost a complete rewrite from version 0.1. Besides flying smoother and using processor resources more efficiently, it now restricts maximum speed to prevent lag. For example, if you're flying fast into a strong headwind, then altitude may…

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Flying 3D Spline Curves between Waypoints with ArduCopter 3.0

Posted on June 15, 2013 at 5:00am 53 Comments

Figure 1: Mission Planner waypoints and telemetry track after 3 spline…
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ArduPhantom: APM ArduCopter in a DJI Phantom Airframe

Posted on April 9, 2013 at 4:00am 41 Comments

Figure 1: ArduPhantom Night…
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Comment Wall (1 comment)

At 1:37am on April 26, 2013, Limj said…

你好,我常州的李梦军。

我是一名老师。惭愧的是APM我这里还没开始玩,希望有机会向您请教。

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