About

Gender

Male


Location

Vancouver,BC


Activity Feed

Sean McDonald commented on Roberto Navoni's blog post When you buy a MP32 we put it in a Magic Box :)
"Thanks Roberto. Email sent. 
Sean"
May 23, 2011
Sean McDonald commented on Roberto Navoni's blog post When you buy a MP32 we put it in a Magic Box :)
"Hi Roberto,
How does one purchase the MP32 board? I have seen it advertised as $99 but can't find it in the shop on your website site www.virtualrobotix.com. Thanks
Sean"
May 23, 2011
Sean McDonald commented on Chris Anderson's blog post Introduction to PixHawk ground control station (including source code)
"Hi all,
I thought I would take a look at Qt and the GS source etc.. After successful install of Qt, I tried to compile the GS source, but I received a string of compile build errors for header files not found....
Has anyone had success in compiling…"
Apr 6, 2010
Sean McDonald commented on Curt Olson's blog post MicroGear hardware in the loop demonstration with FlightGear
"Thanks Curt,
This is fantastic... I am just using serial at 10hz output from FG over 57600 baud and my DCM code is generating the correct pitch and roll over serial output to my VB simple GS artificial horizon indicator... Now I can work on reducing…"
Mar 6, 2010
Sean McDonald commented on Curt Olson's blog post MicroGear hardware in the loop demonstration with FlightGear
"Hi Curt,
The sim is great as Mark has said. I also saw you youtube video with Rascal flying figure of 8... wow... I have a long way to go...but I have had success with sending my hardware data over serial to flightgear. I changed the flightgear…"
Mar 3, 2010
Sean McDonald commented on Curt Olson's blog post MicroGear hardware in the loop demonstration with FlightGear
"Hi Curt,

I downloaded version 2.0 of flightgear and have found that using serial data input, this new version still has a significant delay in processing of the serial data. I found that with my hardware output at 5hz 38400baud, using simple xml…"
Mar 2, 2010
Sean McDonald commented on Sentinel's blog post Borjet MAJA CAD Model
"Hi,
Looks really nice... I have also designed a Maja look alike in CAD, using wing about 1.8m span, and built most of it from regular HomeDepot green foam/corroplast etc... I have not completed it all as yet, just need to fit servos etc, but I first…"
Jan 16, 2010
Sean McDonald commented on jlcortex's blog post Testing inertial attitude estimation in my hardware
"Jose,
Again - thanks for the matlab code. I was nice to compare to my matlab version. It is nice to see that you have it now workings! Unfortunately I have not been able to devote much time to this recently or to review your matlab code to see what…"
May 13, 2009
Sean McDonald replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Hi Bill,

With yours and Louis' previous help in posts, I now have the a matrixnav DCM ported to my ARM7. It seems to work, so long as I don't set any KPPitchRoll and KPitchRoll gains. I now have the gyros giving a good approximation of the change…"
May 8, 2009
Sean McDonald replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Bill/Louis,
The info on the matrix elements is great. I now have it responding to my inputs once I adjusted the gyro gain etc. Now I need to work on the p and i gains for pitch & roll. Without compensation for pitch roll by accel, the euler angles…"
Apr 29, 2009
Sean McDonald replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Thanks Louis,
I have the problem of the jumping from -pi to +pi
I will think this through as I continue my debugging of the code.
Thx
Sean"
Apr 28, 2009