Gareth
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Arducopter PIDs

Started Apr 18, 2013 0 Replies

Hi folksI'm trying to understand the arducopter PIDs and have a couple of questions:1) What is the PID _error_ value measured in for each of the rate and stab controllers.  e.g., is it degrees or 100…Continue

Quad software from scratch - PID question

Started this discussion. Last reply by Gareth Oct 12, 2012. 2 Replies

Hi folksI'm programming a quad from scratch (for fun) and have got gyro/accel data and pwm working fine, but I'm strugging on the PID stuff.I tried tuning a PID with Input = pitch angle, output =…Continue

 

Gareth's Page

Latest Activity

Gareth replied to Brian Leu's discussion Compiling with make (avr-gcc flags?)
"Did you solve this? I'm in same boat."
Nov 16, 2013
Gareth replied to Chris Blackburn's discussion screws too short for 3DR APM 2.5 case
"Joshua please pen me in for new screws. I did contact the uk distributor but they ignored me. Thanks Gareth"
Oct 17, 2013
Gareth replied to CensoredUser ExWikiNinja aka KF's discussion APM2 repair options (fried APM2 board)
"Probably, try it!  If the light comes on it's probably ok."
Sep 24, 2013
Gareth replied to Chris Blackburn's discussion screws too short for 3DR APM 2.5 case
"Just to chime in, I also have this problem of the screws being too short.  I had assumed I was doing it incorrectly but have now chased up the uk distributor."
Sep 24, 2013
Gareth replied to CensoredUser ExWikiNinja aka KF's discussion APM2 repair options (fried APM2 board)
"Yes it's reading the eeprom of the other chip, the usb one. If none of the ABC leds are lit then I suspect the atmega2560 is dead - they're about…"
Sep 24, 2013
Gareth replied to CensoredUser ExWikiNinja aka KF's discussion APM2 repair options (fried APM2 board)
"Willem Hmm, strange - doesn't sound like an easy fault to diagnose.  Possibly it shorted with something on your desk or similar, or as you say electrostatic damage.  My advice would be as follows: 1) Reflash the PPM…"
Sep 24, 2013
Gareth replied to CensoredUser ExWikiNinja aka KF's discussion APM2 repair options (fried APM2 board)
"Yes I should be able to assess in ten minutes whether it's economical to repair although I might not be able to tell exact fault. Perhaps if you tell me what you did to blow it up, how you power board and whether the board has any…"
Sep 24, 2013
Gareth replied to CensoredUser ExWikiNinja aka KF's discussion APM2 repair options (fried APM2 board)
"William, I might be able to repair this for you - I'm based in the UK.  Although obviously I'd charge for it - if its just a single component then 20 EUR plus postage (probably around 5EUR) and parts (diodes are less than 1EUR,…"
Sep 24, 2013
Gareth replied to Roberto's discussion [VIDEO] 2 Different multirotors crash on first flight
"Good luck - look forward to seeing your quad fly.   Your charger looks fine, I wouldn't fiddle with it.  But your battery fully charged voltage should = Number of cells x 4.2. So, 3 cell = 12.6V 4 cell = 16.8V BTW, you get used to…"
Aug 24, 2013
Gareth commented on Gareth's blog post AC3.1 Performance and Custom LEDs
"Thanks for the info Randy.  That'd be quite a useful tool - it might also be useful to collect data on GPS 'glitches' and see what filter might eliminate the sudden fly aways. Best Gareth"
Aug 24, 2013

Moderator
Morli commented on Gareth's blog post AC3.1 Performance and Custom LEDs
"Nice work.Keep it up."
Aug 24, 2013

Developer
Randy commented on Gareth's blog post AC3.1 Performance and Custom LEDs
"Glad to hear the GPS glitches are fixed for you.  Tridge has some ideas that the ublox can report a "Jamming" number which we could use to diagnose whether near by electronics are interfering with the GPS signal. Nice work on the…"
Aug 23, 2013
Gareth posted a blog post

AC3.1 Performance and Custom LEDs

I thought I'd share the following video with you.  After spending several months trying to replicate the rock solid loiter videos, I've finally suceeded - and the only thing that I needed to do (other than vibration dampening) was to raise the GPS several inches above the top plate and keep the wires away from interference…See More
Aug 23, 2013
Gareth replied to Roberto's discussion [VIDEO] 2 Different multirotors crash on first flight
"Roberto You'll be wasting your money splashing out for a NAZA without fixing this problem - you'll have the same thing happen.  I've been plagued with fall out of the sky failures over the last few months - it was a bad solder…"
Aug 23, 2013
Ilya R. commented on Gareth's blog post Build your own Autopilot - tutorial
"Thanks Gareth! I was planning to hack the quadcopter code-base to develop an autopilot for my tilt-rotor quadcopter, but this should be a much easier way to start."
Aug 6, 2013
Gareth replied to Hugues's discussion Optimize your vibration levels with unsuspected technique (thx Forrest Frantz for that) in the group ArduCopter User Group
"Publish your data  - no one can scrutinise it otherwise."
Aug 4, 2013

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Please tell us a bit about your UAV interest
from scractch
Hometown:
London

Gareth's Blog

AC3.1 Performance and Custom LEDs

Posted on August 23, 2013 at 3:00pm 3 Comments

I thought I'd share the following video with you.  After spending several months trying to replicate the rock solid loiter videos, I've finally suceeded - and the only thing that I needed to do (other than vibration dampening) was to raise the GPS several inches above the top plate and keep the wires…

Continue

Build your own Autopilot - tutorial

Posted on July 31, 2013 at 10:08am 28 Comments

I have written a tutorial on how to program your own AutoPilot/Flight Controller from scratch using an arduino/ArduPilot/RaspberryPi.  The tutorial will walk you through everything from reading the RC radio and controlling the motors through to how the PIDs are stacked on top of each other to…

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