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DeveloperPermalink Reply by Doug Weibel on June 20, 2010 at 3:51pm

I think most of what you are seeing is due to the radio input filter. Due to the way we capture the input signals we apply some fairly heavy filtering. This seems to be necessary for some radio types but not for others. We left it in pretty heavy - better slow response than glitchy. If you want to see how it behaves for you with less filtering look in radio.pde. There are some comments in there that would help you change the filtering.

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Permalink Reply by jalves on June 21, 2010 at 2:40pm

Thanks Doug,

I try to change the filtering changing the parameters .8 and .1 in these sentences (ch1 and ch2):
ch2_temp = (float)ch2_temp *.8 + (float)timer2diff *.1;

changed to:

ch2_temp = (float)ch2_temp *.9 + (float)timer2diff *.05;

The servo movement become smoother but slow changing position.

I try other values but that only gave no movement of the servos with the stick input when in stabilize or RTL (the two modes I want to use in my models), even the arduimu was unable to move the servos, odd.

Is this parameters the right ones to change in radio.pde in order to improve the smoothness of the servos when in stabilize??

I try to find some info about changing the filtering in radio.pde but has no luck so far.

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Permalink Reply by jalves on July 2, 2010 at 4:52am

I manage to change the filtering of the radio imput (after all a easy task once we understand the code).

I have now a smooth servo movement when in stabilize mode but only if I am really gentle with the Tx sticks.

If I advance rapidly the sticks, the servos just freeze , they advance to the right position if I move gently the stick (1 click is enough).

The FBW mode continues not to work as it should, the throttle channel (ch3) work well, but ch1 work very badly (almost no movement) and ch2 work worst than in stabilize mode.

Any tips to improve the FBW behaviour and fine tune the stabilize mode?

Thanks in advance.

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