About

Gender

Male


About Me:

Into basketball, paintball, computers


Please tell us a bit about your UAV interest

Interested in multirotors for taking photos and videos


Hometown:

Burlington, vt


Activity Feed

Derek replied to Thomas Schmitt's discussion Prearm Issues with APM 3.3 in ArduCopter User Group
"Rate must match what the pixhawk settings are, I've found 38400 and 57600 to work. . NAV you want pedestrian, not airborn. Airborn is for fast moving airplanes with consistent headings, copters behave more like pedestrians than airplanes. PRT(ports)…"
Sep 20, 2016
Derek replied to ThatJoshGuy's discussion Pixhawk BAD ACCEL HEALTH APM 3.2 - collecting data
"Hi Leonardo,
I would set ins_use2=0. This can be done in the full parameters list, or the full parameter tree. After that, try power cycling and then redo your accel calibration. When you apply the power, try to keep it motionless. The flight contro…"
Jun 27, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"Hi Leonard,
I completed a roll autotune, was wondering if you could take a look at it. The craft must not have been perfectly level as to get it to keep twitching I had to give it a little roll input each time. Do you think I should do the tune over…"
Jun 6, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"Hi Leonard, (replying to this one as the others don't have a reply button to hit)
I ran autotune with the AUTOTUNE_AGGR set to 0.1, the yaw filter set to 5hz and just the yaw axis. I was wondering if you could take a look at the dataflash log of the…"
Jun 4, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"Hi Leonard, thank you for taking a look at these logs. Developers for the ardupilot project have such a hands on approach, very inspiring!

Perhaps I should run autotune on the yaw axis again?

Do you think I should run autotune on the 2nd nearly id…"
May 31, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"Just noticed I posted the wrong multirotors pid. It was a 2nd nearly identical multirotor that I copied and adjusted the pids. Above is the autotune derived pids of the multirotor I meant to talk about

Sorry to cause confusion. I noticed the values…"
May 29, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"Yaw settings were derived via autotune. Autotune did not populate a D setting.

I was thinking the parameter should be 20 to match the rate_rll_filt_hz and rate_pit_filt_hz. I saw a while back that someone posted that theirs defaulted back to 5 rega…"
May 29, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"https://github.com/ArduPilot/ardupilot/issues/2312

I noticed improved yaw performance going to 20hz"
May 29, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"Its possible but it seems more like a parameter or PID value. Can't remember the exact parameter name, something like yaw_filt_hz but it was on 5 on mine and should have been 20. Checked my other MR's running pixhawks and they too had it on 5, and y…"
May 28, 2016
Derek replied to Jacob Heller's discussion Huge wobble when yawing and hard throttle up
"Frame should handle it ok. This is the same frame with bigger props (15") and motors (380kv) and it flies well. Weighs in at 6.2lbs
Regarding vibrations, I'd check your wiring to see if its vibrating against other wires or the flight controller. If…"
May 28, 2016
Derek replied to Randy's discussion Copter-3.3 beta testing
"Thanks guys for the help on this.
Any website with a listing of the meanings behind the ublox uncenter parameters? I successfully connect to uncenter on this gps but I remember trying to upload that config file to a m8n gps last year and it bricked…"
May 22, 2016
Derek replied to Randy's discussion Copter-3.3 beta testing
"Hi attached is log with reset parameters. I see the position innovations (IPN and IPE) go bad around the time I bail out of loiter. Little strange as it seemed out of control during loiter but it shows a low IPN/IPE. Then IPN/IPE goes bad (but is fl…"
May 21, 2016
Derek replied to Randy's discussion Copter-3.3 beta testing
"You might be on to something. I did switch GPS units on the offseason. Its this gps http://www.readytoflyquads.com/mini-ublox-m8n-gps-w-35x35mm-mountin...

I have it mounted as shown (with the ceramic antenna up). Wires going towards the back of the…"
May 21, 2016
Derek replied to Randy's discussion Copter-3.3 beta testing
"Thanks Hubertus for your reply,

Did a reset of the parameters, recalibrated acc and compass, but loiter is still taking off horizontally.  
Here's a log of the same craft taken last year with an older firmware and loiter worked well. Maybe my large…"
May 21, 2016
Derek replied to Randy's discussion Copter-3.3 beta testing
"Acc is well calibrated. Compass I'm pretty sure is, I tried a few different times and flew some test flights and this last one had the lowest IMX, IMY and IMZ in ekf3. The only motor I'm 100% sure is not fake is #3 (they're sunnysky's), and pretty s…"
May 20, 2016
Derek replied to Randy's discussion Copter-3.3 beta testing
"Is this the list you are looking for? http://ardupilot.org/copter/docs/parameters.html"
May 20, 2016
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