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Jack Chen commented on Jean-Louis Naudin's blog post APMRover 2, a fun UGV project for full autonomous recon missions...
"Dear Jean-Louis, thank you so much."
Jun 13, 2012
Jack Chen commented on Jean-Louis Naudin's blog post APMRover 2, a fun UGV project for full autonomous recon missions...
"Hi all,
I found following defination from APM_Config.h of APMrover v2.16a.
"#define CONFIG_APM_HARDWARE APM_HARDWARE_APM1"
It looks like the version of APMrover v2.16a only support APM1 board.
It's correct?
 "
Jun 12, 2012
Jack Chen commented on Jean-Louis Naudin's blog post APMRover 2, a fun UGV project for full autonomous recon missions...
"Dear Jean-Louis,
following your way I had compiled and download sucessfully with newest APM2 board.
But the connection failure happened when I tried to communicate with APM2 by  APM planner with MAV1.0.
I don't know what cause this failure."
Jun 12, 2012
Jack Chen replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Dear Bill:
The altitude holding algorithm of MatrixNavRv2 make me very confused. MatrixNavRv2 can do a accurate altitude holding. But I don't know the MarixNav how to know current altitude? The DCM algorithm seems not provide a way to do a altitude…"
May 10, 2010
Jack Chen replied to Chris Anderson's discussion Discussion forum for UAVDevBoard, Sparkfun's 3-axis IMU-based autopilot board
"Anybady could spend a little time to explain the altitude holding Algorithm of MatrixNav for me?
It seems very hard to be understood. Thanks a lot."
Apr 30, 2010
Jack Chen replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"Dear Bill, I have a question about the integration period of PI Controller of DCM.
It seems to be a long term period which covers whole flight time.
It doesn't like other general PID Controller which limitted only in a very short time gap."
Jan 11, 2010
Jack Chen replied to William Premerlani's discussion robust estimator of the direction cosine matrix
"As i understood,the RMarix outputs measure values of the roll, pitch and yaw which corrected by GPS and acc.
I want to add a "fly by wire" function into DCM.
Following is my PID algorithm.
//From RMarix get corrected values of roll,pitch and yaw.…"
Dec 23, 2009
Jack Chen commented on Jordi Muñoz's blog post Final version of ArduIMU (Include Video)
"I can't access http://jordii07.googlepages.com/ArduIMUFinal.txt, Anybody could help me send it to my email:developcf_2008@yahoo.cn? Thanks a lot."
Nov 20, 2009