Gender
Male
About
About Me:
I'm a PhD student in robotics (our group page: http://koro.informatik.hu-berlin.de/) and i'm working with multirotors as an experimentation platform for my research. I have been using ArduCopter since 2.0.49 on severaly different copters. Some of my smaller projects can be found on my GitHub (https://github.com/azz2k) page.
Please tell us a bit about your UAV interest
I'm mainly using UAVs for my research but i also own some planes etc. personally.
Hometown:
Berlin
Activity Feed
"I'll try to dig up the code but it'll take a few days. So just for the record some information on the PIDs:
lateral control: You can just use PD controllers, they work quite fine in my experience, you need a surprisingly high D part though
hovering…"
lateral control: You can just use PD controllers, they work quite fine in my experience, you need a surprisingly high D part though
hovering…"
"For the basic stabilization, you can use the PIDs which are running on the Ladybird itself. If you want to go a step further and also control the position, you need a way to track the Ladybird to close the feedback loop. We are using an active…"
"The only downside of this is that it's more prone to get mechanically damaged during a hard landing."
"Here you go:
The Raspberry Pi controls the Ardupilot and does the sensor fusion. The ESC only supplies power for the Raspberry, so it's not a Raspberry Pi-based ESC."
The Raspberry Pi controls the Ardupilot and does the sensor fusion. The ESC only supplies power for the Raspberry, so it's not a Raspberry Pi-based ESC."
"We did some further experiments regarding cabeling and sensor placement. We found that the shielded cable itself work pretty well, only minor disturbances werte introduced by nearby electronics. What we totally underestimated was the fact that the…"
"We now implemented the Kalman filter (credit for the implementation goes to https://github.com/boehmdav). We used the OpenCV Kalman filter implementation and fused IMU and sonar. This gets rid of a lot of noise and some of the strange problems. But…"
"The problem is not the noise in the sensor readings, this doesn't affect alt_hold too much as Gary said. The problem are the longer segments of wrong sensor readings from 4m to 1m etc. because then the copter does a pretty big jump in altitude…"
"@Gary: Here's the copter I did the two flights with:
On these pictures, both MB1200 and MB1240 are mounted but only MB1240 is connected. It is a rather tight fit with ESCs close, but both use shielded cables with wire mesh and aluminum foil.…"
On these pictures, both MB1200 and MB1240 are mounted but only MB1240 is connected. It is a rather tight fit with ESCs close, but both use shielded cables with wire mesh and aluminum foil.…"
"I mounted the MB1240 today and did some test runs. They were all flown semi-indoor in a three storey high roofed area over even gravel and wood planks about 2m away from the next wall. I tried to be have to copter as stable as possible. The sonar…"
"Having read your tutorial (thx for that) I ordered an MB1240 some days ago. If the weather permits, I will mount it tomorrow and see what it does. We have only flown MB1200s until now, which we still had in use from two years ago."
"@Scott: We only saw these kinds of errors at higher altitude so you would need a pretty large stand (or maybe a balcony or something like that). Take care when powering up the motors because the I-part of the controllers can start accumulating and…"
"We already tried a median filter with three values, which works to some extent and filters out single wrong values but a lasting error as at 14.4k lines in the log cannot be filtered that way. We are now trying to fuse the sonar with IMU values with…"
"We see the same behavior with an EZ0, too. We also added the RC filter but additionally, we use a shielded cable and even double-shielded it with aluminium foil. Especially the behavior at about 14.4k lines in your log, where the sonar suddenly…"
The Walkera Magic Cube is used to control Walkera models with either a Walkera remote control or using an Android app. We wanted to control the Walkera Ladybird with a computer so we started to investigate how to interface the Magic Cube work with a…
