Mark Mueller from the Flying Machine Arena website and the IDSC presents on Robohub a new failsafe algorithm that enables a quad to remain under control even after the loss of a propeller. The video shows up a quad that intentionally loose a propeller, with and without the new failsafe algorithm:
You can read the full article with more details and photos here:
Quadrocopter failsafe algorithm: Recovery after propeller loss
(don't forget to take a look at the comments below!)
You can also read Robohub's coverage on Amazon's Prime Air and other Quadcopter related articles.
Comments
Wow....It's good
I mean, with fast enough processing, and fast enough ESC updating, I think this could be handled quite easily with our existing PID control implementation. If we were running stabilization loop at 490hz, with 490hz ESC's updates, and the AHRS didn't get confused by the spinning, and you were in Alt Hold, the algorithm would already give up yaw control in order to allow it to maintain altitude. Not going to happen on APM, but maybe PX4.
So what exactly novel about what they're doing that makes it so much different than anything else? I guess we'll find out once we see the patent filing. :)
Didn't notice that.. That's kinda absurd, like the Wright Brothers patenting aerodynamics..
I want to know what it patentable in the code. Have they patented the idea where the code determines "ZOMG, we're spinning out of control, we must have lost a motor!"
The important part here, is that it demonstrates that it is possible for a quad to fly minus one motor. The robust failure detection etc. comes later.
Well, it is made with a BIG computer processing the IR cams in high speed loop. If is really possible to do it just with on-board processing that guys should show it to us, then we could say "Wow, amazing". It is not so really impressive to me because I saw quads doing the impossible using this process on youtube. That process yes, is very impressive. Thank for share with us.
Hopefully the algo can do more than this. Loosing a propeller can be completely ruled out on a copter. Only newbies suffer from that.
I am surprise how many people are amazed at this, I saw this being demonstrated over 6 months ago possibly by the same guy.
I even tested it with a small toy copter, yaw gain set to full and it worked ok to take off and land.
Jan take a look at the comments ;)
it may use the Vicon room at the video but it can be of use with only the on board AHRS
That is genius! I wonder how it would handle with a large quad...
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