I have been using the ErleCopter for a while. The system works pretty well sometimes.
However, for most of the time, the drone starts to shake immediately after taking off. I have to restart the simulation by running those commands again. Sometimes, the drones works well after restarting. For some other times, I need to restart again and again to get it work once.
Here's a video containing what I typed and saw.
Do you have any ideas on this?