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
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
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 wrote about them showing up on the surplus market… Continue
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
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
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
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. Also the screen is a blue/white dot matrix upgrade from the current… Continue
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
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