Archive for May, 2008
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Views: 356
uBlox5 at the controls -
Views: 266
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Views: 281
Silly Procerus module has the logo where no-one can see it except in ground effect hover. Full size version is here: http://diydrones.com/photo/photo/show?id=705844%3APhoto%3A37505&context=user -
Views: 272
http://diydrones.com/photo/photo/show?id=705844%3APhoto%3A37506&context=user -
Views: 257
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Views: 270
Static hover under uBlox control. Optimizing collective feedback is going to be a long process, maybe involving a neural network.
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Views: 307
uBlox5 flying in the wind. -
Views: 275
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Views: 291
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Views: 287
Pressure waves in a segment of barometer readings. -
Views: 285
No lag between barometer & uBlox5. -
Views: 273
The first autopilot tests of uBlox5. Altitude sensing was using the dead barometer. Nothing was tuned for the Blox. Control of latitude velocity was lost after a point. -
Views: 282
Control of longitude velocity was lost after a point. -
Views: 299
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Before -
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After -
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Thread cleaner -
Views: 294
The fruits of our labor. -
Views: 321
Body heat -
Views: 297
More body heat -
Views: 295
& they all wait in line on 680 every day to get to Silicon Valley. -
Views: 330
They've come to celebrate America's last 2 manufactured products: wind & air.
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Views: 401
This is quite good at heating the fluid. A magnetically levitated object in stationary air does not lose heat. It's the world's most unstable thermos bottle. -
Views: 317
Got a tiny bit of oscillation going, but pulling this off is super unstable. -
Views: 343
Sustaining an oscillation without mechanical means has always been the goal. -
Views: 316
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Views: 303
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Views: 304
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PIC programmer. MCLR doesn't rise fast enough to get into programming mode most of the time. -
Views: 346
Well, there is 1 practical use of magnetic levitators. Insulating a fusion reactor from all thermally conductive supports. (MIT)
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Views: 338
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Views: 286
The 2nd hardest part of flying a magnet is getting the H-bridge working without melting it. -
Views: 326
The 1st hardest part is tuning the PID loop. -
Views: 290
It was supposed to keep fluids in suspension by constantly shaking them but abandonned for 2 years for wings. Wings have huge advantages over magnets.
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Views: 377
Contact lens canopy first appeared on the Corona as a waterproofing means. -
Views: 327
Now it's back, as a means of reducing noise & adding decorations. -
Views: 284
The last suspect Molex connectors were replaced by Dean. -
Views: 307
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Views: 298
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Views: 316
For the first time since the radio failure & the ban on golf course flying, got in the air again. -
Views: 275
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Views: 299
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Views: 337
More bald lion. -
Views: 285
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Views: 260
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Views: 335
Bald lion after roll anomaly. -
Views: 276
Affect of blade chopping on accelerometer. -
Views: 292
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Views: 285
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Finally, got some tests using pressure altitude. Although it didn't drift like GPS, it had serious oscillation. Haven't used any lead compensation since switching to pressure climb rate.
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Views: 309
9Hz mode. Plastic blades. No turns or altitude commands. Some gusts of wind threw it off. -
Views: 255
2Hz mode. Carbon blades. No wind. Had to abort after a few minutes because GPS drifted into the ground. Should probably have 1 option where pressure altitude zeros to ground level & absolute altitude is the pressure difference above ground. -
Views: 256
Stuck cyclic anomaly -
Views: 261
2Hz pressure climb rate vs GPS climb rate. -
Views: 267
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Views: 271
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Views: 246
Some pirouettes & forward flights with the 2Hz mode. Obviously some more drift in the forward flight. -
Views: 255
Very difficult GPS environment.