Watch out, the Chinese are catching 'us' up... ;-)

In the new edition of 'Inside GNSS'.


http://www.insidegnss.com/node/1918

Views: 219


3D Robotics
Comment by Chris Anderson on March 24, 2010 at 4:37pm
Sigh. This is not our site's proudest moment. I hardly know where to start.

First, the team described here is South Korean, not Chinese. The cultural stereotyping and ignorance is just embarassing.

Second, who is "us", Simon? Much our community comes from China. We're an international community. China IS "us".

Thirdly, some of the most impressive UAV work has been coming from Chinese teams for years. Where have you been?
Comment by automatik on March 24, 2010 at 4:38pm
Interesting....
however post title says "Watch out, the Chinese are catching 'us' up... ;-)"
and the article mentions that people involved in the project are from Seoul National University
so it would be South Korean not Chinese catching up...:)
Comment by bGatti on March 24, 2010 at 4:46pm
The Title, taken with even a generous view of grammar, indicates that "us" are behind, and that the Chinese are doing the work of bringing "us" up to the average level - perhaps by means of winding excellent Brushless motors and building inexpensive ESC's hopefully, with their help, "us" will soon rejoin the cluster.
Comment by Simon Wood on March 24, 2010 at 5:36pm
Appologies - offense was not meant - despite my unwise choice of title.

It's very interesting article.
Simon.

Developer
Comment by Doug Weibel on March 24, 2010 at 5:41pm
Aside from the embarrassing post, the underlying article is pretty interesting. These guys are running a Kalman/DCM solution apparently with no gyro or accelerometer inputs, just mathematical/aerodynamic models and gps. Pretty cool IMO.
Comment by Ryan on March 24, 2010 at 7:13pm
Everyone deserve to have progress - hell, the US only decided to try UAV in combat because of the IAF experience...anyway, lets not go down this road.
Comment by Ryan on March 24, 2010 at 8:03pm
Back in the day, Aerosonde old avionic only have one gyro for jaw, airspeed and pitch control by pressure sensors - pretty amazing!
Comment by Jack Crossfire on March 24, 2010 at 8:05pm
GPS derived attitude on anything small enough for our apartment would be incredibly noisy. You need a big airframe or RTK. The space shuttle may have used it & it was called 3 string GPS. NASA never published specifically whether 3 string GPS was used for attitude or just redundancy.

Yes. Since every part is made in China, every UAV is a Chinese UAV whether it's team is in Korea, Australia, Japan, Europe, or that U country.

Developer
Comment by Mark Colwell on March 24, 2010 at 8:15pm
Based on good old American software technology,

credits from article:
Manufacturers

The reference station and UAV on-board receiver were both the 3151R from Novatel, Inc., Calgary, Alberta, Canada. The software for both onboard and ground stations was developed using Visual C++ with MFC, which runs on the Windows 2000/XP Professional operating system from Microsoft Inc., Redmond, Washington, USA. The data was plotted by using MATLAB from Mathworks, Inc., Natick, Massachusetts, USA.
Copyright © 2010 Gibbons Media & Research LLC, all rights reserved.
Comment by Michael Zaffuto on March 24, 2010 at 9:28pm
Their controller is based entirely on the constraint of coordinated turns to keep turn rate and roll angle correlated. I suspect a few gusts of wind or shear from the right direction and its over.

Not to take away from the fine implemenation from S.Korea....but....

Let us take a moment now to bow our heads and give credit where credit is due:

Kornfeld, Hansman and Deyst, of MIT, invented GPS Velocity Vector Based Attitude Determination, Report No. ICAT-99-5. June 1999. Contains all the theory for Single antenna GPS based pseudo-attitude and psuedo-flight angle(pitch) determination.

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