2 DoF sim racing rig that only produces Sway and Yaw

Hi All,
Ages since I posted anything here, but I have been lurking a fair amount.

I want to attempt to build a rig for sim racing that only produces Sway and yaw, or side load and traction loss, the mechanicals of this are something I am perfectly fine with, but I wan to ensure that I can utilise current control software to link this to game ssuch as Assetto Corsa, BeamNG, Dirt Rally, etc.

I have been looking at SimHub and I see that SMC3 can be selected on there, but I am not sure if this would let me setup profiles that only used the two axis?

If anyone knows if this is easily possible for two motors, with BTS 7960's and an Arduino to be driven via SMC3 and/or SimHub in this way it would be greatly appreciated

Kind regards,
James

A 2DOF rig for sway and yaw would be easy to build because you can put it on shopping cart wheels and simply push it sideways with two actuators, one in the front and one in the rear.

But you have to realize that it's not possible to simulate a constant side force such as driving in a circle all the time with only sway. So I think you'd rather want yaw and roll.

BTW, a combined sway and roll movement could be implemented with a pivot point above the rig as I suggested some time ago.

Hi Aerosmith,

Thanks for the input, I actually previously read your post on overhead pivot point.

I realise that sway would eventually run out of travel, but figured in reality you don't sustain many corners long enough for that to be the case (I am excluding Nascar and Indy500 etc. but that holds no real interest for me anyway).

I guess my question isn't really about the dynamics or design (incedentally I have a design that utilises two linear rails (1 Front and 1 rear) where the front one allows the upper frame to pivot and the rear rail (actually two shorter rails) allows pivot and for and aft movement), such that the upper platform can move in sway and yaw to the extremes of the rails.

The main reason I want to avoid roll and pitch motions is that these require the motor to actually lift the upper platform and the occupant, where as sway and yaw can just have the motor push the platform on the rails and with my heft should be more responsive

So my question is really about if those two axis (sway and yaw) can be taken from a game by SimHub into SMC3 to drive the motors via arduino? or does it expect the main axis to be pitch and roll?
I can only find information about setting up SMC3 as a seat mover in the traditional (Pitch&Roll) sense.

PS: I could do Yaw and roll with the top platform rolling left and right whilst pivoting at the front for yaw.
If you wanted to feel like a car on track a high pivot above you wouldn't emulate the point the car pivots around well, even if it provided the correct cues in direction. I am trying to emulate my real world MX5 Trackday car's feeling as it turns in and the sway sensation happens and then the slip angle of the car lessens that sensation as you come out of the corner.

It´s not possible with Simhub. Simhub doesn´t provide Customsolutions. Only 3DOF with 3 or 4 Actuators, Seatmovers and in Future 6DOF.

TL alone would be possible, but not Sway.

And most of the time your motor or mechanical design are the limiting factor in speed and response, not the weight of your rig.


https://www.simhubdash.com/simhub-motion-addon/