DrGeorgeTompson
Full Member
Karma: +4/-0
 Offline
Posts: 80
|
 |
« Reply #15 on: March 12, 2014, 06:01:41 PM »
|
|
|
for S4 Mbox, (actual pressure - "ground" pressure), or pressure over ambient in kPa (mBar)
So is it deviation from the requested load? e.g. Motor running at 4k, requested load is 1500 actual is 1000, apply value at (500,4000)? Or am I totally off ? Are your values also under 1000 like mine? |
|
|
|
|
Logged
|
|
|
|
|
nyet
|
|
« Reply #16 on: March 12, 2014, 06:15:59 PM »
|
|
|
So is it deviation from the requested load? e.g. Motor running at 4k, requested load is 1500 actual is 1000, apply value at (500,4000)? Or am I totally off ? Are your values also under 1000 like mine?
whoa whoa... no pressure and load are two completely different things it is actual - ambient. ambient is (probably) near 1000hPa ...  |
|
|
|
« Last Edit: March 13, 2014, 09:36:26 AM by nyet »
|
Logged
|
ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
|
|
|
DrGeorgeTompson
Full Member
Karma: +4/-0
Offline
Posts: 80
|
|
« Reply #17 on: March 12, 2014, 06:30:54 PM »
|
|
|
ambient is (probably) near 1000kPa ... do you mean mBar? it is actual - ambient.
So if the turbo or whathaveyou is pushing 1 bar then the x-axis of the table will be 1000(but actually 700 cause that's as high as it goes)? |
|
|
|
|
Logged
|
|
|
|
|
dream3R
|
|
« Reply #18 on: March 13, 2014, 05:50:10 AM »
|
|
|
do you mean mBar?
So if the turbo or whathaveyou is pushing 1 bar then the x-axis of the table will be 1000(but actually 700 cause that's as high as it goes)?
The input is lde. lde = measured - setpoint which is basically the error part of the PID controller. Checkout the LDRPID section of the FR, the diagrams might make some sense. I'm assuming the 700 you speak of is the lde axis, which means that if lde>699 then it will be in that section of the map. The other input is nmot (rpm) The output of he maps, say KFLDRQ2, form part of the PID math which becomes the duty cycle of the controller (afaik). I'm researching this at present and am looking through the code etc so someone might correct me. |
|
|
|
« Last Edit: March 13, 2014, 05:51:55 AM by dream3R »
|
Logged
|
|
|
|
DrGeorgeTompson
Full Member
Karma: +4/-0
Offline
Posts: 80
|
|
« Reply #19 on: March 13, 2014, 08:55:15 AM »
|
|
|
The input is lde. lde = measured - setpoint which is basically the error part of the PID controller.
Checkout the LDRPID section of the FR, the diagrams might make some sense.
I'm assuming the 700 you speak of is the lde axis, which means that if lde>699 then it will be in that section of the map.
The other input is nmot (rpm) The output of he maps, say KFLDRQ2, form part of the PID math which becomes the duty cycle of the controller (afaik).
I'm researching this at present and am looking through the code etc so someone might correct me.
Forgive me for being a nob, but what is the FR? I had figured the axis was something along the lines of error/deviation, so being LDE makes sense -- I vaguely remember reading that at one point. I'll start logging LDE so I can try to piece this shit together. I flashed back to AWEdit2.5 this morning. here are some logs. The load curve looks better than last evening (KFLDRL changed). To me, the curve looks good, or at least it looks like a typical pid result curve. So in theory, wouldn't I be able to tweak the P or something to control the overshoot without making my rise time go to bot? At least I think it's the P that I should tweak (LDRQ0S?) |
|
|
|
|
Logged
|
|
|
|
|
nyet
|
|
« Reply #20 on: March 13, 2014, 09:17:17 AM »
|
|
|
The input is lde. lde = measured - setpoint which is basically the error part of the PID controller.
Checkout the LDRPID section of the FR, the diagrams might make some sense.
I'm assuming the 700 you speak of is the lde axis, which means that if lde>699 then it will be in that section of the map.
The other input is nmot (rpm) The output of he maps, say KFLDRQ2, form part of the PID math which becomes the duty cycle of the controller (afaik).
I'm researching this at present and am looking through the code etc so someone might correct me.
The axis is not lde. |
|
|
|
|
Logged
|
ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
|
|
|
|
nyet
|
|
« Reply #21 on: March 13, 2014, 09:19:22 AM »
|
|
|
Forgive me for being a nob, but what is the FR? http://nefariousmotorsports.com/forum/index.php?topic=400.0title=I had figured the axis was something along the lines of error/deviation, so being LDE makes sense The axis is not lde I flashed back to AWEdit2.5 this morning. here are some logs. The load curve looks better than last evening (KFLDRL changed).
To me, the curve looks good, or at least it looks like a typical pid result curve. No, you should see a pronounced dip in wgdc right before peak boost So in theory, wouldn't I be able to tweak the P or something to control the overshoot without making my rise time go to bot? At least I think it's the P that I should tweak (LDRQ0S?)
No. P will not help overshoot. You will need to increase D. Also, please consider using ECUxPlot rather than doing all that graphing by hand.. |
|
|
|
« Last Edit: March 13, 2014, 09:26:18 AM by nyet »
|
Logged
|
ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
|
|
|
|
dream3R
|
|
« Reply #22 on: March 13, 2014, 09:30:43 AM »
|
|
|
The axis is not lde.
Sorry I meant the input, the axis is HPA? |
|
|
|
|
Logged
|
|
|
|
|
nyet
|
|
« Reply #23 on: March 13, 2014, 09:34:06 AM »
|
|
|
|
|
|
|
|
Logged
|
ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
|
|
|
|
dream3R
|
|
« Reply #24 on: March 13, 2014, 09:35:41 AM »
|
|
|
Right, thanks  |
|
|
|
|
Logged
|
|
|
|
|
phila_dot
|
|
« Reply #25 on: March 13, 2014, 09:57:37 AM »
|
|
|
IIRC, lde is used for the control term axis'.
Base boost pressure, plsolr, is used for I limitation.
|
|
|
|
|
Logged
|
|
|
|
|
nyet
|
|
« Reply #26 on: March 13, 2014, 10:08:07 AM »
|
|
|
Oops. You are correct
|
|
|
|
|
Logged
|
ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
|
|
|
DrGeorgeTompson
Full Member
Karma: +4/-0
Offline
Posts: 80
|
|
« Reply #27 on: March 13, 2014, 10:11:07 AM »
|
|
|
Oops. You are correct
yay! |
|
|
|
|
Logged
|
|
|
|
DrGeorgeTompson
Full Member
Karma: +4/-0
Offline
Posts: 80
|
|
« Reply #28 on: March 13, 2014, 10:16:20 AM »
|
|
|
No, you should see a pronounced dip in wgdc right before peak boost
No. P will not help overshoot. You will need to increase D.
Also, please consider using ECUxPlot rather than doing all that graphing by hand..
Ok, I'll mess with D, that makes sense. Thanks for posting that example. That helps a lot also, i'll start using ECUx. I really have no idea why i wasn't using it. It's nice as shit. |
|
|
|
|
Logged
|
|
|
|
|
nyet
|
|
« Reply #29 on: March 13, 2014, 10:18:11 AM »
|
|
|
Ok, I'll mess with D, that makes sense. Thanks for posting that example. That helps a lot
BTW that one is VERY extreme because that is a tight wastegate system. You will not need as much of a dip for k03s A very slight dip is probably more than sufficient. |
|
|
|
|
Logged
|
ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
|
|
|
|
