The Autodesk Oregon FRC Regional happens over two days: today (past) and tomorrow. Last night, I was testing a new control scheme for my tricopter in preparation for the regional when I lost control of the throttle and let the tricopter drop eight feet to a tiled floor.
Last week, I tried flying the tricopter in a larger room across the hall to observe some realistic flight behavior. Unfortunately, at this stage, I’m forced to land the tricopter a second or two after takeoff because the stupid controller feels just fine flying the thing into walls and chair legs. I need to take [...]
I’ve been working on stabilization code for the tricopter using direction cosine matrices but haven’t yet gotten too far because the DCM updates too slowly. I must be doing something wrong. For now, I’ve got basic damping (basically D control) using low-pass-filtered gyro outputs and some PID control that needs adjustment. Actually that’s a misnomer [...]
Curse my impatience. I got wired control pretty much working, so I went ahead and hooked up my XBees (wireless link) for testing. I had my hand on the chassis just in case, but I guess I didn’t apply enough pressure—it went full throttle on its own (I had barely touched the joystick) and flew [...]
Last Tuesday, I took apart my 2nd-gen BlackBook to fix my squishy right palmrest (top was not flush against bottom case) when I was surprised by the heat and size of my battery. I don’t have a picture, but it looks like the one in this MacRumors thread. The battery is thickest at the center. [...]