About

Gender

Male


Location

Niedersachsen, Germany


Please tell us a bit about your UAV interest

A fan of APM.


Hometown:

Göttingen


Activity Feed

Yi Zheng commented on Andrew Tridgell's blog post Learning the ArduPilot codebase
"Nice, Thx."
Nov 28, 2014
Yi Zheng commented on Robert Haddad's blog post Adding External Configuration GPRS Telemetry Module to APM 2.6 or Walkera X350 Pro
"This is exactly what I an trying to do. Thanks for sharing.
But I would like to add a feature which can decode and encode Mavlink protocol such that signal strength can be shown on GCS(may require a arduino with more flash space). And a TCP transfer…"
Oct 30, 2014
Yi Zheng replied to Jeffrey Scott Atkins's discussion Naza Fly Away
"The ugliest face of DJI is not their technical issues, but their attitude to technical issues reported on forum.
DJI is a advertisement sponsorship of one of the biggest RC forum in China. Many DJI users report their issues(Wierd attitude behavior c…"
Oct 3, 2014
Yi Zheng replied to Jeffrey Scott Atkins's discussion Naza Fly Away
"Can not agree more."
Oct 2, 2014
Yi Zheng replied to Jeffrey Scott Atkins's discussion Naza Fly Away
"You should not miss http://www.sb-dji.com/ in Chinese. The glorious DJI fly-away collection."
Oct 1, 2014
Yi Zheng replied to William Premerlani's discussion An improved method for accounting for acceleration in gyro roll-pitch drift computations
"Thanks for reply, Philip.
I went through the function drift_correction function in class AP_AHRS_DCM. But I could not find any logic in the code that will redirect to other accelerometer based roll-pitch compensation when GPS is not available(yaw co…"
Aug 16, 2014
Yi Zheng commented on William Premerlani's blog post Acceleration compensation: flight testing
"Brillant job. Thanks a lot William.
I went through the code in file AP_AHRS_DCM.cpp, it seems ArduCopter runs only this algorithm on APM2 for gyro drift compensation.
But it relys on GPS and my APM2 flys perfectly indoors (with GPS intalled, having…"
Aug 15, 2014
Yi Zheng replied to William Premerlani's discussion An improved method for accounting for acceleration in gyro roll-pitch drift computations
"Brillant job. Thanks a lot William.
I went through the code in file AP_AHRS_DCM.cpp, it seems ArduCopter(Quadcopter) runs only this algorithm on APM2 for gyro drift compensation.
But it relys on GPS and my APM2 flys perfectly indoors (with GPS intal…"
Aug 15, 2014
Yi Zheng commented on Thomas J Coyle III's blog post Drone Stuff: Parachutes, Politics, and No-Fly Zones
"DJI deserves it. In fact it is very necessary for DJI. But I don't think it fits DJI's flying-away bug."
Jul 26, 2014
Yi Zheng commented on bigkahuna's blog post I may have just witnessed the future of personal drones...not sure if I like it
"Everything here is even MORE unacceptable with DJI, because of its stupid, unreasonable and very dangerous crashes."
Jul 21, 2014
Yi Zheng replied to Saurabh Ladha's discussion Quadrotor fly away in ArduCopter User Group
"Hi, Randy,
Thanks for the nice technical details. I will surely look into source code of pixhawk in the furture."
Jul 20, 2014
Yi Zheng replied to Saurabh Ladha's discussion Quadrotor fly away in ArduCopter User Group
"I am not quite sure about my idea, but it seems to be related with extend kalman filter in certain vabration condition. DJI declars that their flight controller use kalman filter, and there are many crash and fly-away cases which are not explainable…"
Jul 19, 2014
Yi Zheng replied to Randy's discussion ArduCopter-3.1 released!
Apr 24, 2014
Yi Zheng replied to Yi Zheng's discussion Caution! Clicking on "Wizard" in Mission Planner can cause unexpected changing in frame type
"Yes, A warning window may be quite helpful. Or keeping everything unsaved before one clicks finish in Wizrds, this is the default Windows program behavior I got used to.
I didn't do any cautious test befoce taking off because I thought I just clicke…"
Apr 21, 2014
Yi Zheng replied to Yi Zheng's discussion Caution! Clicking on "Wizard" in Mission Planner can cause unexpected changing in frame type
"Hi, Gustav,
Thanks for reply. I did't config in air. I adjusted some paramaters in evening before the crash and wrongly clicked the Wizard then closed it without doing anything. Unfortunately, Wizard changed by frame type to +4 without any reminding…"
Apr 21, 2014
Yi Zheng posted a discussion
Hi,I got a wobbling crash from 1 meter height for my X4 copter yesterday. The uncontrolable wobbling happened  2 seconding after taking off and was caused by an unexpected changing from X4 to +4 in my APM 2.6.The problem turned out to be a Mission P…
Apr 21, 2014
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