November 2009 Blog Posts (95)

SC-203, Small UAVs, and You

Earlier tonight I had the pleasure of attending an AIAA seminar on Unmanned Aircraft Systems in the National Airspace System led by John Moore, a principal design engineer with Rockwell Collins.



SC-203, a special committee requested by both the AOPA and the FAA, is currently drafting recommendations for policies that will "assure the safe operation of Unmanned Aircraft Systems (UAS) within the National Airspace System." A vast majority of the regulations SC-203 is in the process of… Continue

Added by Adam Kaplan on November 17, 2009 at 10:01pm — 2 Comments

Airtec UAVs video



Promised video from… Continue

Added by Dimitar Kolev on November 17, 2009 at 12:33am — 6 Comments

Yet another 3 axis single chip gyroscope

http://www.st.com/stonline/stappl/cms/press/news/year2009/p2440.htm



Apparently a world first, but I swear I saw something similar a few weeks ago.



Again though as with the ITG-3200 and the other ST gyros, this one will most likely leave much to be desired for serious UAV… Continue

Added by Angus Peart on November 16, 2009 at 4:41pm — 17 Comments

ArduIMU groundstation written in 'processing'

I have created a basic 'ground station' for the ArduIMU in the 'Processing' IDE



The Processing development environment is very similar to the Arduino evironment

Processing compiles into Java, it allows you to run the same code on Windows, Mac OSX and Linux.



Being a Mac user and suffering from not being able to find and run the correct version of the NI LabView runtime engine I decided to have a go at creating a ground… Continue

Added by agmatthews on November 16, 2009 at 5:00am — 38 Comments

Gyro and accelerometer vibration tests



I performed some rudimentary vibration tests on Razor 6 DOF board with Arduino - which has same gyros and accel as ArduIMU (LPR530AL and… Continue

Added by automatik on November 16, 2009 at 2:00am — 3 Comments


3D Robotics
DIY Drones live chat/podcast tonight at 8:30pm PST

Free video streaming by Ustream



Tonight (Sunday) we'll do our regular podcast, which everyone here is welcome to participate in by listening to the chat live above and commenting and asking questions via the DIY Drones… Continue

Added by Chris Anderson on November 15, 2009 at 7:30pm — No Comments


Developer
More news.. (Including new 2Ch OptoCoupler and ArduIMU Flat issue)

For some reason my left index finger hurts me, so i can't type very well. ;-)



I'm setting up ArduIMU and ArduPilot SVN repertory, in conjunction with Google code. In that way you will be able to track all the changes made to the code and spot the differences between revisions with the possibility to comment (or complain) about it.



Lets do an interesting example, if you go to google code repertory for ardupilot and you click in the tab "source" and then in the option… Continue

Added by Jordi Muñoz on November 15, 2009 at 2:30pm — 10 Comments


3D Robotics
Excellent tear-down of an old military gyro



They don't make them like this anymore! Gorgeous manufacturing, but it's still a mystery how this old missile gyro actually works. Great step-by-step teardown here. I've got one of these and we… Continue

Added by Chris Anderson on November 14, 2009 at 6:24pm — No Comments

A New AHRS about $300



The CHIMU developed by Ryan Mechatronics. Here is the link: http://www.ryanmechatronics.com/index_files/ProductDetailCHIMU.htm



Including 3 axis gyro, 3 axis accelerometer, and 3 axis compass. But it seems that there are no kalman filter implemented. However, the price is cheaper than previously posted VN-100:… Continue

Added by Jianguo Zhao on November 14, 2009 at 8:30am — 8 Comments

THIS WEEK IN AEROSPACE

THE DISH FARM





The main flying event of the year was the dish farm flight. The dish farm is being torn down in 2011 & replaced by flea startups.



Don't think it emits radio waves anymore & VicaCopter is invisible when she's stationary. Nevertheless, got serious radio dropouts after a certain amount of time. Seems the XBee wire antennas are extremely directional, end-on antenna pointing even at 300ft kills the… Continue

Added by Jack Crossfire on November 13, 2009 at 12:30pm — 1 Comment


Developer
ArduIMU code tests/improvements II

I have implemented the dynamic weighting of accelerometer info and works very well...

I have made some flight test and the IMU can register some difficult maneuvers like rolls and loopings...

Well, rolls are not difficult for an IMU (there are no centrifugal forces involved) but loopings are quite difficult.

I´d also start to make some test of the robustness of the IMU/stabilization in difficult flight conditions. I flight in manual mode, do some "strange" maneuvre and then let… Continue

Added by Jose Julio on November 13, 2009 at 10:51am — 8 Comments

Putting your EM-406 GPS back in to NMEA mode without waiting

I've read several times that to get your EM-406 out of binary mode you need to remove power and wait three days or a week, Bah! Send it the (binary mode) command to go back to NMEA! The only catch is, you do have to know what speed it is listening/talking in binary. If you don't know that, you can try all the bit rates. If that doesn't work, then I guess that you will need to unplug for a week. :(



The following sketch will set your 406 to NMEA mode, and set which messages to send, at… Continue

Added by Ken on November 12, 2009 at 6:45pm — 6 Comments

AWESOME Su27 project!

I found this website accidently, it's not mine, but it's worth to be here.









Here is whole proces of making this plane.



RESPECT for Harald…
Continue

Added by Justas on November 12, 2009 at 8:00am — 4 Comments


Developer
The handheld groundstation for the ArduPilot

Hello ArduPilots,



You will find somme photos of my hand held groundstation design based on the Ardustation at :…

Continue

Added by Jean-Louis Naudin on November 12, 2009 at 1:30am — 3 Comments


3D Robotics
Latest prototype of ArduStation Mega

The team designing the hardware groundstation for ArduPilot Mega is making great progress. Above is the latest case prototype from Scott Plunkett. Needless to say, there will be more buttons.… Continue

Added by Chris Anderson on November 11, 2009 at 5:00pm — 26 Comments


3D Robotics
Drones vs Pirates

From BotJunkie: "The US military is now using MQ-9 Reaper drones to track suspected pirate ships in the Indian ocean. That’s track, not attack, but the MQ-9 is specifically designed to carry weaponry, so it’s the logical next step. Throw some ninjas and zombies in there somehow, and we’ve got the greatest movie ever made." [via… Continue

Added by Chris Anderson on November 11, 2009 at 8:00am — 5 Comments


Developer
Visualizing PID loops

This post is an attempt to add a visual explanation of PID loops. I had read Michael King's excellent post , but I wasn't sure how to design loops to do specific things.



To me PID loops seemed a bit of a black box, so I decided to graph them out in order to better understand the inputs and output of the equations. They are actually quite simple, but I've never seen a good visual explanation. I may have… Continue

Added by Jason Short on November 9, 2009 at 4:45pm — 5 Comments


Moderator
Sony Webbie on Easystar

I got my Sony Webbie! and with the wide lense.



It's installed in the nose of my easystar, I was a little nervous if it was too heavy for the star.



The test flight went ok, although the weather was bad.…





Continue

Added by Robert Krogh (hooks) on November 9, 2009 at 3:31am — 12 Comments

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