Russian 2DOF wiper motor simulator

The branch of the discussion was moved to a separate forum:
http://www.mal4x.org.ru/forum/forums.php?forum=6

Thats a bummer. Only if we could understand Russian..

We would be interested in your progress so if you don't mind please share some pictures or videos here as well!

Sorry for the bad efficiency - Adam: -)! We will soon prepare urgently and update information on the project.

That is not collected as needed, but that works well.
http://www.youtube.com/watch?v=VTZKKjmV4vs&feature=player_embedded

P.S.: There are currently trying to set up profiles so as not to be ashamed before Community
P.P.S: There will be upgraded...

WBR

Hi,

Nice work so far. I see that you are getting alot of seat rotation. Your simulator will feel much better if you either use a universal joint or rods and ball joints (such as in the Frex) to prevent seat rotation.

very nice
what about h bridge?
can u send pic and infos about it and about pot pozition

Hi!
To prevent rotation of seating we have used tie rod ends:

Are you able to rotate the seat by hand if you try? Unless it's a illusion in the video, it sure looks like it's rotating somehow.

Looking great! Seems like you have lots of movement and the motors are fast too..

Due to the geometry of the tierods, there is an inherent rotation associated with Roll. You cannot ONLY rotate the seat, the rotation comes with the angular movement of the base, or vice versa, depending on the force vector. The closer together you put the rod ends on the seat frame, the more rotation there is.

Just picture the base on the above picture rolling to the right. Because the length of the tie rods cannot change and one end is bolted to the frame, they will push/pull on the seat base accordingly as it's angle (and also distance to the frame) changes. This will cause the yaw rotation when the seat tilts, or it will cause the seat to tilt when the seat is rotated, the two are tied together and their relationship depends on the geometry.

This is a similar geometry to a 4point off-road suspension, except here only 2points are used with a fixed universal joint.

Well done, so far!

However, the rotation looks like to be caused by a design flaw. I experienced this as well, and got rid of the rotation by changing the rod end positions.
The rod ends on the seat frame should rather be connected together on a vertical screw, than side by side.
As well the rod ends connected to the base frame should be aligned with the pivot.
Other than that, the rubber pivot may be too soft perhaps.

Besides that. Which effects are you using? Seems like the longitudinal g-forces (accelleration/braking) are missing, and the vertical and transversal g-forces (left/right, bumps) are too strong.
I know, fine-tuning a motion profile takes some time

regards

Hi All!

Thanks for the tips to improve our simulator. Tie rod ends that I use too big and difficult to connect at one point. But I want to try to connect them as closely as possible and move away from the pivot point.

We use Thanos H-Bridge with IRLZ44N mosfets. Now hbridge working properly. Another minor modification is that the motors are connected to the mosfet coolers to reduce electrical losses.

Potentiometers are connected directly to the engine axis. This is temporary, as I'll put hall sensors

ok, i understand.

Your design is brilliant!

Keep up the good work and inform us about your troubleshooting techniques.
I Look forward to more of your projects.

Hi ru.null!
What metric are the rod end size? M10 or M12?
King regards.

benshelmars
Thank you! :

M10 at screw side and M14 rod side. From ford focus 1998-2005.

Thank you. Do you try M8 one? Do you think is to much thinner?
King regards!

I dont tried, because dont know on what car they used and could not find them. M8 will be enough.

I rebuild rods to prevent rotation. Very simply and its really work.

respect null!
It is such a fundamental modernization? An interesting experience, and the final video! As well as a description FAQ, if possible in the near future ..

Yes, this is the final design changes to limit the rotation. It's simple and it works. However, after the beta test, I decided something else changed in my sim. So I can not, at this moment to make a video. But I'm working on my sim all the free time and I hope the results will be soon.

PS Probably funny when two russians speak English :lol:.