"I found this article on how a laser doppler system could be used to determine everything we need.
If anyone knows more about laser velocimetry, please feel free to respond. Could we do this with a diode laser?"
srinath mallikarjunan's Discussions
Angle of attack and sideslip sensor
Started this discussion. Last reply by srinath mallikarjunan May 9. 1 Reply 0 Likes
HiI have been thinking of making these for a while and by reading the discussion forums there seem to be a couple of options outlined here…Continue
Xbee usb adapter is identified as a mouse by windows 7
Started this discussion. Last reply by Andreas Feb 7. 11 Replies 0 Likes
I am using the following telemetry kit.http://store.diydrones.com/Xbee_Telemetry_kit_p/kt-telemetry-xbee.htm I have…Continue
GPS connector
Started this discussion. Last reply by srinath mallikarjunan Nov 24, 2011. 2 Replies 0 Likes
My GPS connector on APMega just broke. Where can i buy a replacement? (It's the 6 pin make header on the APMega board)? ThanksSrinathContinue
APMega spares
Started Nov 19, 2011 0 Replies 0 Likes
My GPS connector on APMega just broke.Where can i buy a replacement? (It's the 6 pin make header on the APMega board) ThanksSrinathContinue
srinath mallikarjunan's Page
Latest Activity
srinath mallikarjunan replied to srinath mallikarjunan's discussion Angle of attack and sideslip sensorsrinath mallikarjunan posted a discussionAngle of attack and sideslip sensor
HiI have been thinking of making these for a while and by reading the discussion forums there seem to be a couple of options outlined herehttp://diydrones.com/forum/topics/angle-of-attack-sensor?id=705844%3ATopic%3A78347&page=2There seem to be 4 optionsa)A rotary vane connected to a Hall effect sensor/low friction potb)A diode laser(not a clue about this)c)A 5 hole probe(Seems…See More
Andreas replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"What a strange USB connector that is ;)"
Colin Bouriquet replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"I confirm Andreas' solution is working... i've been looking a bit in order to find out really whats going on. The only thing i've got so far is that it's not APM or XBee related, it's recurring though almost all windows…"
Andreas replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"Mark forwarded me a theory and fix from another thread (also described by Colin above). I can confirm that the workaround solves the issue for me.
The theory: If the APM and Xbee are sending data when the PC xbee is plugged in, the com port…"
Andreas replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"It used to happen 20% of the time for me. Unfortunately on the flying filed last Saturday it happened 100% of the time and I could not fly with the Xbee link. Also I can't do anything in the device manager as soon as the Xbee is plugged in. Any…"
Colin Bouriquet replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"Paul, what versions of FTID drivers are you using ? 2.08.14 or 2.08.17(Beta) ? Thanks."
Paul Williams replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"yeah thats what i do!
"
Colin Bouriquet replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"Paul, you mean that when you plug the ground xbee module to the USB, the plane module is already transmitting data ? When i do that either it jumps the mouse crazy or it bricks the Xbee..."
Paul Williams replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"Mine running on Win 7 64bit and worked from the off, no problems.
TX on quad power on start mission planner then lastly connect the USB to the Xbee, select the com port and speed then connect, so far works ever time."
Colin Bouriquet replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"The only thing i've found is that when plugged to the computer, the port should not be receiving data... if i plug first the computer module and then i turn on the plane module, it works..."
Colin Bouriquet replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"Same problem here... i'm gonna try Simon's workaround... those Xbee are driving me crazy..."
Simon Kunz replied to srinath mallikarjunan's discussion Xbee usb adapter is identified as a mouse by windows 7"I have the same problem. I didn't find a solution to it but the following reliefs the pain a bit:
1) open the windows device manager
2) open the "Mice and other pointing devices" tree node
3) Plug in the xbee module
4) A second later,…"
srinath mallikarjunan replied to srinath mallikarjunan's discussion GPS connector"I think i need a horizontal connector.
I think the vertical one, won't have any strength if soldered onto the APMega board."
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Srinath mallikarjunan's Blog
DCM versus Kalman filter
Posted on May 12, 2011 at 8:17am 6 Comments 1 Like
Hi
I notice that attitude estimation is done using the DCM algorithm.
I was wondering if anyone, has tried implementing a Kalman filter for attitude estimation?
The DCM update has a nice intutive feel to it, but i would like to throw in a sound math proof for why it converges. Has anyone worked on this so far?
Regds
Srinath
I notice that attitude estimation is done using the DCM algorithm.
I was wondering if anyone, has tried implementing a Kalman filter for attitude estimation?
The DCM update has a nice intutive feel to it, but i would like to throw in a sound math proof for why it converges. Has anyone worked on this so far?
Regds
Srinath
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