highaltitude.log.20070328

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[06:41] <icez> howdy jcoxon
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[06:49] <jcoxon> hey icez
[06:49] <icez> how be you?
[06:50] <jcoxon> i'm okay thanks
[06:50] <jcoxon> you?
[06:53] <icez> not bad
[06:53] <icez> been busy busy
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[11:07] <LaurenceB> Hi there
[11:10] <LaurenceB> I've been thinking about PID loops, the extropolation technique thats being used in my glider code is the same as a PID loop with rudder input
[11:15] <LaurenceB> but PID loop with rudder input doesnt amplify errors in the same way :-)
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[23:18] <LaurenceB> edwardmoore, are you free on saturday?
[23:19] <edwardmoore> sozzle, london this weekend, seeing the god-parents
[23:19] <edwardmoore> why what's happening?
[23:19] <LaurenceB> I was thinking of maybe going for a launch from the rocketry site
[23:19] <LaurenceB> it'd be goood to be able to use the engineering dept to set up
[23:20] <edwardmoore> not sure who's in or near camb atm
[23:20] <edwardmoore> i'm on the south coast atm
[23:21] <LaurenceB> present weather forecasts put wind at 17mph on saturday
[23:21] <LaurenceB> thats a bit high, but hopefully it'l change
[23:21] <edwardmoore> what altitude?
[23:21] <LaurenceB> 4Km
[23:22] <LaurenceB> i've removed the grease from the serve, but there's no insulation
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[23:24] <edwardmoore> may work still
[23:24] <LaurenceB> we'd need someone from the eng dept, is Henry in cambridge still
[23:24] <edwardmoore> you need an atmospheric chamber/biscuit tin with dry ice
[23:24] <LaurenceB> I would hope it'll work!
[23:24] <LaurenceB> its only -10 centigrade
[23:25] <LaurenceB> at the very least probably more like -7
[23:27] <LaurenceB> I've been experimenting with simulating a PIDR loop, ie feed in the rudder from the previous second
[23:28] <LaurenceB> it kills off the oscillation but is more error resistant
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[00:00] --- Thu Mar 29 2007