2016年4月20日 星期三

PID video


case Too high P gain:

        -> Oscillate rapidly
             Gain height easily
              Hard to control Height
              Oscillate sound from the motors.

case : Too low P gain

         -> Hard to control
          -> Easy to correct over


case :Good P gain...  too  high I gain

          ->Oscillates... but with  a lower frequency  than with a too high p -gain

case  Good P gain...  too  low I gain

       ->  move to back when stick is release due to gravity.
            Easy to move by hand over long time

case  Good P gain...  Good I gain

       ->  Stay in position when stick is release .
            hard to move by hand over long time


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Sometimes  Your I gain is can be two times higher than your p for a lot of module

一開始先調P gain....  一直調到 會快速震盪....代表  P gain 太大....再慢慢減低...

接下來調I gain...

D gain 是用來對付強風的...因為加速度很大...

https://www.youtube.com/watch?v=YNzqTGEl2xQ

Ref : https://www.youtube.com/watch?v=LtocGBngSrA

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