Replies to This Discussion

DeveloperPermalink Reply by jasonshort on June 21, 2012 at 11:11am

Would you do an RTL? How else would you like to handle the condition? Also would this work without GPS?

Your thoughts are appreciated.

Jason

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Permalink Reply by Jerry Normandin on June 21, 2012 at 11:30am

Jason, 

I'd treat it similar as the ArDrone supports it.  This feature should work with and without the GPS.

If max altitude is hit then max throttle is achieved and throttle is no longer increased.

No need to RTL.  If this feature is set, then cap altitude in all modes.

Just my two cents. 

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Permalink Reply by Ron Perry on June 21, 2012 at 7:54pm

A Max_Alt parameter would be great to include while setting up the GeoFencing feature...

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DeveloperPermalink Reply by Andreas M. Antonopoulos on June 21, 2012 at 9:54pm

This feature is already in early testing. 

I would be interested in Jason's question again:

If Vehicle X reaches ALT_MAX, what should the vehicle do?

Is the answer the same for plane, heli, tri, quad etc?

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Permalink Reply by Ron Perry on June 21, 2012 at 10:34pm

Im assuming Jerry suggests a ceiling limit to prevent throttling (and/or for planes elevating)further up than a specified altitude. Would it really be necessary to RTL every time the ceiling is breached?

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Permalink Reply by Jerry Normandin on June 22, 2012 at 5:37am

I would prefer it just to prevent increasing altitude.  No need to RTL.  A ceiling limit is just a ceiling limit.

Noting else.   A powerful multicopter can climb to a high altitude pretty fast.    The alt_max can be used as a useful photography tool as well.  Lets say you want to shoot a photo at 250 ft and do not have a telemetry link.  If you go full throttle you know you will stop around 250 feet. 

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Permalink Reply by Bjørn Didriksen on June 22, 2012 at 12:17am

It would probably be benificial to prevent it from increasing altitude, as there might be a reason for a hight limitation. Power lines across a walley, restrictions due to air trafic, turbulence due to mountain formations and so on.

Would it be a posibillity to have a setting like "ALT_MAX_ACTION" or something?
0=RTL, 1=do not climb or something like that?
We would then also be able to add new features easy by adding value 2 and so on?

 

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Permalink Reply by Jerry Normandin on June 22, 2012 at 5:44am

Bjorn you know where I am going whit this.  Cool.    ALT_MAX action may be an option we would like to see.    One option is to cap altitude, a max  option might be if ceiling was exceeded drop down to ceiling. MAX option should be an option though.    

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Permalink Reply by Jerry Normandin on June 22, 2012 at 5:51am

All the factors of altitude are going to be taken into consideration.  Eric are you poisoning this thread too?  Of course a helicopter is different.   Also of course if you are forward into a headwind you decrease throttle for a longer time until you drop below the ceiling.  You can also adjust pitch for a quicker drop in altitude.

It's not only a throttle cap for every situation, but it's a good start.   

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