Motion Simulator community for haptic flight and racing simulation. Get in and start your project: Register here

[AldoZ]

I am still kicking it...... and my own........

haha dude, reading your last comment I imagined the Duke saying (using the duke voice..):
"ahhh It's good!!!"

I think a material version of PID as a end stage boss could be a good idea for the next Duke chapter..
Sure will be a fuckin damn hard boss. And sure I probably lost my last decent working neuron on my skull!

But my friend, trying, trying and trying and now we have already some secure PID settings to use! Not bad!

[bsft]

Yes, same here, PID settings working finally.....
I only blew up JRKS from stupidity of hooking up them, NOT over currenting them.

[AldoZ]

Another thing,
in the plot of variables window in the jrk config utility I can see the ERROR variable:

It this variable referred to the accumulation of PID errors in the time?

And if yes, what of the errors showed on the error tab is the same showed in the variables plot?:

Or maybe the error variable in the plot of variables window is a total value of all possible errors?

[bsft]

I havent looked that far, but feedback disconnect is exactly that, there is a good chance you may be over throwing your pots feedback settings to cause it to fly too far. I had the same problem, so I re-did feedback, adjusted PID to help stop overshoot and got results.
Errors will always happen, its just the JRK handing them is the key, things like PID rate as well, I run mine at 25ms, 5ms caused too many errors.
Maybe with your setup , it requires some more work on PID and stuff.

Ummm....that probably didnt answer that......

[tahustvedt]

The error graph looks like the difference between the target and feedback. Error in this case means the difference that you are trying to eliminate with PID adjustment.

[AldoZ]

The error graph looks like the difference between the target and feedback. Error in this case means the difference that you are trying to eliminate with PID adjustment.

Ah, good confirmation. Probably the motor goes overshot when this graph become too distance from the feedback graph (or just I think..).
Next tests I will try to watch this graph while someone driving my platform.
Just to undertand how this graph work related to the feedback and target in the different driving style, profiler and PID..

[AldoZ]

Great news here! Today I received the new winch gear from tahustvedt!
Really fast and the gear fit and work perfectly, without any issues!

An universal THANK YOU AGAIN to tahustvedt!
My friend, you really pulled me out of a bad trouble, in a very fast and operative way! believe me!

And now let's to make the pot modification for this gear and max 2 days and I will be able to continue the tests!

[tahustvedt]

Great news! I can't believe how fast that went.

[AldoZ]

Hi all again!
Today I finshed a full 2 days tests with great result about reliability.

Over 1 hour of non stop test with just the motors a bit warm.

Here the vid of today (Spa Francorchamps):


This profile is a good mix between rudeness and softness.

Tomorrow evening I will test a new profile modification to push my 3dof at his limits about vertical bumbs!.
My impossible mission is to get near to the "force-dynamics" bumps..
yea, I know, my motors are not fast and powerful as the force-dynamics motors but I am pretty sure I can reach a really good result.
Cutting a bit the max travel of the vertical bumps and playing good with the values on the gForce plugin,PID and motors so I am sure I can get a damn good effect!

Obviously might not be enough.. So if I need more power I have ready the relays device, ready to be plugged on my 3dof electrical box...
Here the pics:

I am really curious about. Finally I am near to test this POWER plug for my 3dof.. total power from the motor of the winch.
IF you set the max current to infinite with cycle and accelleration to the max so you can't reach the power of the winch motor directly plugged to the batteries.
The jrk make a GREAT work but can't handle all the real motor power.
Using the relays system will be as the motors are directly plugged to the batteries.. really MAX power from these motors..

Here what my motor can lift in vertical :

with jrk and max performances from jrk config utility = 60/65 kg (with a bit of effort)

without jrk, directly plugged to the battery = 85/95 kg (without effort)

Using realy system I get the same power of the motor directly plugged to the battery.


So maybe tomorrow will be the right moment to plug my BOOST system! will see

See soon!

PS: tahustvedt, the gear works GREAT!

[AldoZ]

Ok, today a lot of tests and a really great reliability! (not yet used the relay system)
No major problem except one.
One of the spring coils touching the upper side of the cylinder, blocking the vertical travel (I can't use 10cm of vertical travel!!)

Bad new because now I need to reposition the spring.
Probably the point where the spring is attached are too narrow so the spring can not rotate itself enough to not deform.
The attach point are really tight so the spring can not vent so it start to deform making a coil to touch the cylinder blocking the vertical travel.

I hope this is not a really bad problem and I hope to solve it this saturday reposition the spring.

however great tests and great fun! I am sure that without the problem of the spring I would get the final version of my 3dof! But was obvious I need to wait to celebrate

here the vids of today:


Subaru Impreza 2006 on Suzuka with a lot of little bumps!




Subaru on Suzuka without a lot of little bumps - Notice from 1:39 the damn FAST reaction of my Subaru!




Subaru on Laguna Seca using MEAN VALUE FILTER




Subaru on Laguna Seca without MEAN VALUE FILTER


Next vids will show the 3dof using the relay method! See soon!