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Author Topic: Actual pre-control in LDRPID  (Read 217991 times)
6L20vt
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« Reply #150 on: February 22, 2018, 02:33:55 PM »

I think your boost request is causing the issues you are experiencing.  You have some pretty large changes in request in the spool up zone.   Flatten this out and it should take care of if for you.   Summary, increase request @ 2000 - 2500 to flatten the request out.

perfect, thanks for the help I'm going to try. Apart from this, do you think I should touch some other map in the pid ?, or should I just manually adjust the kfldrl map?

I attached photos of the generated maps, and the logs that I used

regards
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SB_GLI
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« Reply #151 on: February 22, 2018, 06:04:23 PM »

You want to leave the 95 column of drl all 95 so that you can get fastest spool at all rpms.  Work the KFLDIMX table in tool to achieve this.

I never adjust KFLDRL after the tool.  If I have to fix anything up, it's usually general over/under shoot.  For that, usually a percentage adjustment the entire IMX axis is all that's need to get it perfect.  That and a little Q2 to fix spoolup overboost.  The rest should just trim out.

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6L20vt
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« Reply #152 on: February 23, 2018, 12:43:55 AM »

if I understand correctly, you propose me to modify the content of imx (linear values), and if I suffer overboost in the whole range or underboost, modify the axis of imx truth ?.

thanks
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SB_GLI
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« Reply #153 on: February 23, 2018, 10:05:26 AM »

The change that I suggest to keep 95 locked at 95 in DRL is simply to make sure you aren't limiting WGDC to a lower value when you want fast spool up, it will not fix the issue that you have (I believe the LDRXN change I proposed will take care of that)

For example, if you have the value 65 in KFLDRL 95/3000, you will never be able to get WGDC values higher than 65 @ 3000 rpm and your spool rate will suffer. 

in summary, always leave 95 column values as 95.

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6L20vt
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« Reply #154 on: February 23, 2018, 01:17:47 PM »

I've made the changes you've told me, and now column 95 stays intact, I think this is what you wanted to tell me? thanks for your help
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SB_GLI
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« Reply #155 on: February 23, 2018, 06:35:20 PM »

that should work fine.  I like to keep KFLDIMX linear though.
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6L20vt
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« Reply #156 on: February 23, 2018, 09:28:13 PM »

that should work fine.  I like to keep KFLDIMX linear though.

yes, imx is linear according to the data that I entered in the tool
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6L20vt
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« Reply #157 on: February 23, 2018, 11:28:24 PM »

well, I still do not get a stable result, this is the last test generated with the same axes of the last photos, but applying the spool filter in 65 / 0.20s, it has improved a bit, but I do not know if I should work any other map, or edit manually drl a bit.

thanks
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SB_GLI
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« Reply #158 on: February 24, 2018, 06:32:57 AM »

yes, imx is linear according to the data that I entered in the tool

It's not
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SB_GLI
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« Reply #159 on: February 24, 2018, 06:35:36 AM »

well, I still do not get a stable result, this is the last test generated with the same axes of the last photos, but applying the spool filter in 65 / 0.20s, it has improved a bit, but I do not know if I should work any other map, or edit manually drl a bit.

thanks

Just modify the ixm axis values by a few percent (post tool) to get it to run through drl how you need it to.  Haven't yet looked at the log.
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6L20vt
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« Reply #160 on: February 24, 2018, 06:40:10 AM »

It's not

my imx is 400 10%,650 20%,750 30%, 950 40%, 1150 50%,1250 60%,1350 70%,1450 80%
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6L20vt
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« Reply #161 on: February 24, 2018, 01:09:09 PM »

looking at the log, I see that I have a cycle left at the beginning, and I am missing between 3k-4k, should I change the axis and increase the whole axis by a% or should I decrease it? If I increase it, it will make the hole worse, but then I can correct it from q2?
I wrote the imx data in the tool exactly as it is here

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SB_GLI
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« Reply #162 on: February 24, 2018, 05:35:38 PM »

look at your kfldimx in 3d view and tell me it's linear.... it doesn't need to be though it will work fine without it being perfectly linear.  it's just easier to make adjustments if it is.
« Last Edit: February 24, 2018, 05:45:09 PM by SB_GLI » Logged
SB_GLI
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« Reply #163 on: February 24, 2018, 05:42:03 PM »

You just need a little more q2 and it will be perfect.
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6L20vt
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« Reply #164 on: February 24, 2018, 09:45:11 PM »

call me an idiot, but I'm not sure I understood you, do you mean I should try to make this view more linear? let's say it is ascending but more straight?
Can you give me an example?
thanks
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