We're been making progress on the ArduPilot code and are getting closer to releasing a proper beta. In the meantime, here's an update (and, for the brave, a pre-alpha look at the code):
The basic outlines of the code (GPS parser, navigation loops, altitude control, servo control, etc) are written. The GPS parser is pretty well tested and works okay. The navigation algorithms have been tested on a simulator, but still need to be tested in the real world. The servo control needs to be… Continue
after a whole bunch of trial and error, i'm happy to say that my the parts camcoder i will be using for the panoramic system is 100% operational, set up, and ready to be mounted. The biggest problem was getting the "no tape" warning off the main screen. It looks like i'll be only needing a servo for the zoom. I've spent the day researching my stepper motors and gears, pushing through basic equations and what not. In the end, if i get this gear set i want (and without using legos :) ), i should… Continue
so i got my pred today. Thanks again to helomix. Let's just say a whole bunch of mixed emotions arose when i saw it, from happiness that it was finally here, to the nervousness set in when i realized that i'm truly at the point where i need to put my skills where my mouth is, i mean, I already did it with money, to disappointment when i realized i have to cut back on a few items i my project :-P.
There are two things i realized when i saw the pred-… Continue
because there's no easy way to connect the arduino to a normal perf-baord (stupid 2mm space between digi7 and digi8) i decided to make it the right way from the beginning. so i downloaded eagle and played around the last few days. this is what has come out. :) i plan to use the arduino bootloader and just connect the few needed pins to a empty diecimila board for easy programming. all the traces are already handrouted.
This is just the coolest thing. It's not exactly UAV-related, but our FPV (first-person view) friends use much of the same technology as we do, from real-time video links to on-screen displays (OSD) of GPS and telemetry data. Here's what one FPV guy did to…
One of my goals for my UAV has been to use Google Earth as the tool to display flight paths, and next to create a waypoint list visually. Why reinvent the wheel right?
Well I'm halfway there. This logger writes Google Earth Compatible KML files onto an SD… Continue
For those of you not familiar with the project we are a university team competing in the 2008 UAV Outback Rescue Challenge, for more information about our team visit our site: www.aessuav.org
On May 10th we attempted our first bottle drop from 400 feet. The bottle had an aluminum tab attached to it which was held by small servo at the center of gravity of the UAV. We took off under manual control and gained… Continue
[Marc Ramsey gave a fantastically clear and concise answer to a question that's asked here every week, so I'm going to reprint it here with some slight edits as a FAQ that we can link to from the front page.]
Q: What's the difference between a gyro and an accelerometer? Do I need both?
An accelerometer measures acceleration. A 3-axis accelerometer will tell you the orientation of a stationary… Continue
As cool as our Lego Mindstorms IMU-driven UAV is, it's a shame that HiTechnic hasn't yet released the commercial versions of the prototype servo MUX (RC multiplexer + servo controller) and integrating gyros that make it… Continue
The BASIC Stamp and Arduino aren't the only microcontrollers out there. The Parallax Propeller chip, as many of you have already discovered, is a more powerful microcontroller. Boasting eight 32-bit processors, it is… Continue
We've enjoyed watching the development of Stanford's STARMAC II quadcopters, and this video does a good job of showing why: the 6 vehicles are light, incredibly accurate in both GPS and ultrasonic position sensing, and…