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Frequency for PID computation

Posted by Guillaume Helle on September 3, 2010 at 9:02am

Hello,

 

what must be my PID regulation frequency for my QuadRotor?

 

1ms, 10ms, 100ms?

 

It seems ESC for Brushless motors can't change values under 20ms, so it is not necessary to compute PID quickly?

 

I have an IMU (Razor 9DoF) and i communicate with it at 57600bds so i am limited too for my PID computation?

 

Thanks for your ideas... ;-)

 

Guillaume

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Replies

  • Developer
    Doug Weibel September 3, 2010 at 6:20pm
    Quad's have been successfully built using 20ms frame rate ESC's. There is no point in running your PID loop any faster than your ESC's frame rate.

    There are ESC's available that will handle much higher frame rates, and these will provide better performance in a quad.
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