Closed MatzElectronics closed 7 years ago
I have often thought expo would be nice to do in the controller itself, and it could be done reasonably easily with a lookup table. Would cost some time & memory, but maybe not too bad.
Throttle change limiting also would be relatively easy - could make it so you can't change it more than X per update. Would obviously be a beginner setting, but also worth trying.
J
On Friday, September 16, 2016, Matthew Matz notifications@github.com wrote:
This is a "tuning for beginners" concern. Most v3's are sold with DXe's, which require a separate cable, software, and are generally a PITA to alter their settings. This is a discussion about whether expo + capping/softening sudden throttle increases is needed.
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For throttle change limiting, I'd prefer limiting rapid increases only...and the amount of limiting as a settable option. For expos - would doing it by formula take too many cycles? I'm sure we could find a way that's a good balance of memory vs. cycles. I played around with some options on a spreadsheet, and this looked good:
Radio.Aile = Radio.Aile / ( 1024 / ( abs( Radio.Aile ) ) )
Just have to watch out for divide by zeros.
Another option would be two or three linear approximations with increasing slope...
Your formula is fine, but it won't work without using float math, and that'll make it really slow. I was thinking a 16 or 32 entry table with linear interpolation in between, or possibly a quadratic curve function, evaluated in fixed point. Probably slower to do the latter, but I'd test both and see.
For throttle limiting what I was thinking was just limiting the amount of change from one frame to the next, but I can see value in allowing rapid cuts - I'll think about it a bit. Shouldn't be too hard.
J
On Saturday, September 17, 2016, Matthew Matz notifications@github.com wrote:
For throttle change limiting, I'd prefer limiting rapid increases only...and the amount of limiting as a settable option. For expos - would doing it by formula take too many cycles? I'm sure we could find a way that's a good balance of memory vs. cycles. I played around with some options on a spreadsheet, and this looked good:
Radio.Aile = Radio.Aile / ( 1024 / ( abs( Radio.Aile ) ) )
Just have to watch out for divide by zeros.
Another option would be two or three linear approximations with increasing slope...
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I'm good with the small table and interpolation. I'll draft it and test it out. I can take a crack that the throttle up limiting too.
I tried flying with expos for the first time today - and that makes a WORLD of difference. 40% felt about right - so yes, we definately need to code this in.
Yeah, there's a reason this is a standard radio feature. :)
On Saturday, September 17, 2016, Matthew Matz notifications@github.com wrote:
I tried flying with expos for the first time today - and that makes a WORLD of difference. 40% felt about right - so yes, we definately need to code this in.
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Except setting it on the DXe is a PITA.
On Sep 17, 2016 8:40 PM, "Jason Dorie" notifications@github.com wrote:
Yeah, there's a reason this is a standard radio feature. :)
On Saturday, September 17, 2016, Matthew Matz notifications@github.com wrote:
I tried flying with expos for the first time today - and that makes a WORLD of difference. 40% felt about right - so yes, we definately need to code this in.
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Expo on Roll/Pitch and Yaw (two settings) is submitted.
On Sat, Sep 17, 2016 at 8:41 PM, Matthew Matz notifications@github.com wrote:
Except setting on the DXe is a PITA.
On Sep 17, 2016 8:40 PM, "Jason Dorie" notifications@github.com wrote:
Yeah, there's a reason this is a standard radio feature. :)
On Saturday, September 17, 2016, Matthew Matz notifications@github.com wrote:
I tried flying with expos for the first time today - and that makes a WORLD of difference. 40% felt about right - so yes, we definately need to code this in.
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Moving throttle change limiting to a separate issue
Tested, working
This is a "tuning for beginners" concern. Most v3's are sold with DXe's, which require a separate cable, software, and are generally a PITA to alter their settings. This is a discussion about whether expo + capping/softening sudden throttle increases is needed.