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nyet
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« Reply #105 on: November 17, 2019, 01:59:40 PM »
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I don't see d nor lde nor b_lddy in that picture.
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totti
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« Reply #106 on: November 17, 2019, 02:06:15 PM »
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I don't see d nor lde nor b_lddy in that picture.
The cursor is set to the point where lde is lower 100 and d part is 9. You can see the data at the left side. |
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nyet
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« Reply #107 on: November 17, 2019, 02:13:33 PM »
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The cursor is set to the point where lde is lower 100 and d part is 9. You can see the data at the left side.
lde has to drop below 10 or above 100 to trigger lddy off/on. See also hysteresis. i don't see what is actually going on with lde so i can't tell. Either way, D has to overwhelm P and I such that you see a drop in dc well below the I limit and also *well before* lde hits 0. |
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« Last Edit: November 17, 2019, 02:17:41 PM by nyet »
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nyet
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« Reply #108 on: November 17, 2019, 02:25:45 PM »
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Orange circle... why is your imax jumping here?
Added yellow line should be your dc.
it should come down well before lde=0 and should settle on imx soon after lde=0
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totti
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« Reply #109 on: November 17, 2019, 02:44:04 PM »
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Orange circle... why is your imax jumping here?
Added yellow line should be your dc.
it should come down well before lde=0 and should settle on imx soon after lde=0
It's jumping because my boost request was not stable. It changed from 2350mbar to 2330mbar. Yes I would like to see that curve on dc. |
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nyet
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« Reply #110 on: November 17, 2019, 02:46:10 PM »
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It's jumping because my boost request was not stable. It changed from 2350mbar to 2330mbar.
got it, didn't see that. |
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totti
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« Reply #111 on: November 23, 2019, 10:21:15 AM »
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A big big thanks for the advices. I added more Q2 and the curve is nice for me.
The last log for the different starting rpms.
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nyet
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« Reply #112 on: November 23, 2019, 01:05:30 PM »
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fantastic, glad you are getting what you want out of the PID finally.
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totti
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« Reply #113 on: November 23, 2019, 01:40:33 PM »
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fantastic, glad you are getting what you want out of the PID finally.
Really thanks for the patience and for the help. I've learnt a lot about how does the boost pid work. At higher rpm's it has a little overboost but I think it is in the acceptable range. |
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totti
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« Reply #114 on: November 23, 2019, 02:20:59 PM »
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I've just checked the logs and foung something strange for me. How does it possible that rlmax is lower than the rl_w?
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nyet
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« Reply #115 on: November 23, 2019, 02:29:02 PM »
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They're not directly related and they're never really cross checked.
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totti
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« Reply #116 on: November 23, 2019, 02:44:41 PM »
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They're not directly related and they're never really cross checked.
Ok so my log seems good and normal. |
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nyet
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« Reply #117 on: November 23, 2019, 03:59:14 PM »
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Ok so my log seems good and normal.
Yep. |
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