1 Jan 2004 10:15
Happy New Year(NT)
Rick Eversole <rick <at> eversoles.com>
2004-01-01 09:15:14 GMT
2004-01-01 09:15:14 GMT
-- -- Rick Eversole <rick <at> eversoles.com>
1 Jan 2004 23:25
Re: Minutes of ERPS #274
Randall Clague <rclague <at> rclague.net>
2004-01-01 22:25:43 GMT
2004-01-01 22:25:43 GMT
On Tue, 30 Dec 2003 09:10:26 -0800, cpwinter <at> rahul.net wrote: >Gizmocopter >----------- >Dave Masten > > Sean reported that Gizmo has successfully lifted three legs off the ground >and momentarily bounced the fourth one off the ground all while under >control of the laptop computer. Congratulations! And you did it by December 17th, too.Keep the spinning side up, -R -- LSO to pilot after 6th bolter, "You have to land here, son. This is where the food is."
2 Jan 2004 08:06
Gizmo tethered flight #2
David Masten <dmasten <at> piratelabs.org>
2004-01-02 07:06:53 GMT
2004-01-02 07:06:53 GMT
Happy New Year. We just did the second flight test of Gizmocopter. Control is greatly improved over the first test, but could stand a little more tweaking. We ran into a problem with the serial port talking to the BasicStamp controller. I think it is a bug in getting the serial info and then changing it. I would get the error about 2-3 seconds into starting the flight control software. Opening minicom and then exiting fixed the problem. Dave -- -- David Masten <dmasten <at> piratelabs.org>
2 Jan 2004 09:21
Re: Gizmo tethered flight #2
John Carmack <johnc <at> idsoftware.com>
2004-01-02 08:21:57 GMT
2004-01-02 08:21:57 GMT
At 11:06 PM 1/1/2004 -0800, you wrote: >Happy New Year. > >We just did the second flight test of Gizmocopter. Control is greatly >improved over the first test, but could stand a little more tweaking. We >ran into a problem with the serial port talking to the BasicStamp >controller. I think it is a bug in getting the serial info and then >changing it. I would get the error about 2-3 seconds into starting the >flight control software. Opening minicom and then exiting fixed the >problem. > >Dave Can you describe the complete sensor / computation / actuator system for gizmocopter? Johjn Carmack
2 Jan 2004 10:56
Re: Gizmo tethered flight #2
David Masten <dmasten <at> piratelabs.org>
2004-01-02 09:56:50 GMT
2004-01-02 09:56:50 GMT
On Fri, 2004-01-02 at 00:21, John Carmack wrote: > Can you describe the complete sensor / computation / actuator system for > gizmocopter? Sure - I'll also include a few more notes that did not make into the previous email. Spec is for a gyro and accelerometer in each axis, control is done with two threads - a hard real-time stability augmentation and a non-real-time command augmentation. The stability thread is a simple proportional-derivative control off the gyros which then converts the resulting pd vector into 4 integers for the relative motor speeds. The motor control variables are sent via serial to a BasicStamp that converts the integers to standard R/C control signals. The command augmentation is a PID control on the combined gyros and accelerometers (and anything else we decide to add). The command augmentation does all the higher level work - rotations, integrations and derivatives to determine what it is doing; massaging the incoming joystick commands for the stability thread; telemetry; etc. What we actually flew was just the stability thread - without calling from the real time interupt (we called it from a timed loop) and without actually reading the instruments. We "flew" it completely by hand - or rather I should say we bounced it around on its two inch tether. What we were after was more or less three things - do we have enough power for the weight to actually fly? (yes), How long do the new battery packs last? (two packs - 1 minute flight duration, and we have a few seconds between noticeable engine slowdown and engine cutoff), and what(Continue reading)
9 Jan 2004 19:58
9 Jan 2004 23:30
Re: DC Area ERPS?
Pierce Nichols <forkbomb <at> earthlink.net>
2004-01-09 22:30:12 GMT
2004-01-09 22:30:12 GMT
On Fri, 2004-01-09 at 10:58, Justin S. McFarland wrote: > I was wondering how many members of the listserv were in the DC area, and if > any of these people would like to start having meetings similar to the core > members here. Well, the active membership of ERPS is entirely SF Bay Area... however, I know of at least one list member, Andrew Case, who is DC-based. I dropped by to see him yesterday. -p
12 Jan 2004 09:54
Armadillo Jan 11
John Carmack <johnc <at> idsoftware.com>
2004-01-12 08:54:06 GMT
2004-01-12 08:54:06 GMT
http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=240 Includes an 11 meg video for those of you with the bandwidth. John Carmack
12 Jan 2004 22:43
Re: Armadillo Jan 11
Alex Fraser <beatnic <at> comcast.net>
2004-01-12 21:43:57 GMT
2004-01-12 21:43:57 GMT
What a great video, drama, character development and a great ending. Will big things happen this summer? -- -- >>>>>>>>>>>>>>>>----<<<<<<<<<<<<<<<<< ........ Alex Fraser N3DER ......... ......... beatnic <at> comcast.net ....... [~]_>^</\-[~]_>^</\-[~]_>^</\-[~]_>^<
12 Jan 2004 23:46
Re: Armadillo Jan 11
John Carmack <johnc <at> idsoftware.com>
2004-01-12 22:46:07 GMT
2004-01-12 22:46:07 GMT
At 04:43 PM 1/12/2004 -0500, you wrote: >What a great video, drama, character development and a great ending. Will >big things happen this summer? We keep expecting some fairly big things to happen this MONTH, but we thought the same thing last month... Real Soon Now. John Carmack
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