Momentary Drop from Auto to Stabilize, then back to Auto

Hi all,

I've experienced this several times, on Auto Missions, the most recent glitch made the copter fall from the sky....

The glitch is less than 1 second long.

Most times, it just restarts the mission from the beginning.

I'm using a Spektrum DX7s, and I'm using the flaps and the Landing Gear Mix to create 6 modes on channel 5.

The mode outputs on channel 5 are all fairly centered in the window comparators that I see in the mission planner, in other words, a bit of noise wouldn't make it change modes, also the fact that Stabilize isn't adjacent to Auto makes me wonder why this is happening.  The throttle input to the logs is very steady during this time, so this is very confusing.

Also, the most recent time it happened, I was very close to the copter, you can see me standing on the ground in this video, that's how close I was when it got this glitch:

http://www.youtube.com/watch?v=v6pKzofFAgU

It happened on both Arducopter 2.5.5 and also now on 2.6.

I think the most likely culprit is the transmitter/receiver, but just wondering if others have ever experienced this....

Dan Gray

Here's a screenshot of the Log File, using APMVisualizer:

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Permalink Reply by Dan Gray on July 23, 2012 at 10:31am

Here's the screen shot of the graph.  The glitch in the mode is the Red Line over the number 31174.

You can see the altitude which is the Cyan color, it plummets to the ground!

You can see the throttle input, and how I slammed it up during the fall (But it didn't do any good, because it was back in auto mode).

You can see the Nav Throttle increasing too little too late!

Fortunately, propellers aren't that expensive!

Dan

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Permalink Reply by James on July 23, 2012 at 1:58pm

ive experienced loss of gps a couple of times during auto flight, and in some ways it resembles this.  in my case it just seems to drift off with the wind, but looking at the logs its dropping into stabilize.

i always take off manually and switch into auto from a hover, i wonder if that could be the difference?

james

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