pid boost control overshoot

[fetzi]

hello,

maybe someone can give me some advice which parameters should be changed to avoid overshooting.

actual:
normal position: 50
proportional gain: 1,5
integral gain: 0,2
derative gain: 0,15
min duty: 10%
max duty: 97%
pos integral clamp: 18
neg integral clamp: 18




thx.

regads
dominik

[fel1979]

Dominik,

I would spend a lot of time doing a normal position on the open loop mode before turning the PID on.

I have found that the best my normal position table is, less effort is left for the PID to do it.

Usually I create a table on normal position with the X-Axis RPM Based and Y Axis according necessity.

Attached is a log from a car that I finished last week, with on P at 1, beginning the PID tuning. However I have spend a lot of time working with the normal position.

I hope this information helps.

[MarkMc]

All PID systems must have a well set up normal position, as Dominik says it makes the PID need to do less. Set it up open loop first, the open loop table will become yout normal position. Also you should read my PID explanation in the forum if you have not done alread.