For awhile you can borrow my son's video camera. I just need to get a new charger for it as the original is broken. This is a DV camera. We have spare tapes. Borrow time is indeterminate but a least until December 15.
On Sat, 2004-11-06 at 21:17, David Masten wrote: > We have gizmo moving around under control now. Unfortunately it is still > too unstable to really control. > > Monday we dove straight into flight testing. It didn't work at all. We > pulled out the multi-meter and oscilloscope to troubleshoot. After > spending a considerable amount of time trying to find what was wrong > someone noticed the fuses on the motor leads were toast. We all went out > to our cars to grab our spare fuses. Several cars are using the mini > fuses now, but we managed to find enough 30-amp fuses. Flights were more > as expected than the crash a few weeks ago. Gizmo got into a slow roll > and a definite +x translation whithout command. I was able to land it > quickly enough. We took video, I'll post links as soon as the video is > put up. We did two flights, with similar results. > > I did some more test flights today. Knowing that there was a tendency to > roll (we define roll as rotation around the vertical axis), I tried > compensating for the roll while keeping one of gizmo's gear on the > ground. I was able to control it fairly well though the response was a > bit slow. That tells me I need to up the control constants a bit. I also > tried full flight. It did an immediate translation but appeared to not > get any worse, indicating that the response was not fast enough, but > that it did zero out the rotation. It also pointed out that it is > sufficiently small enough and unstable enough that I am not quick enough > to really bring it under control. I ended up shutting down the motors > just as I noticed that I was entering into pilot induced oscillation. > All of which occurred really fast, each flight was probably 1 or 2 > seconds from the time the gear left the ground. > > Todo items: > > - buy a good digital video camera. It would be useful to watch video > rather than my internal memory. > - Tweak the control constants > - add higher level control code. We are only controlling rotational > rates right now. We need to add in a PID loop for rotational > position/translational velocity. > > Dave -- Rick Eversole <[EMAIL PROTECTED]> _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
