my alternative concept of motion

hi guys
I want to show another concept of realizing a racing car simulation. The idea was not primarily build a common position system, than a system that reflected various driving conditions, as the suspension feeling,the cornering, the acceleration, the braking and additional speed for open cars.
All actuators are based on SFX 100 project modified for push pull, the motion software is FlyPt, the controller are arduino mega with 4 DOF controller code and Simhub for wind, great thanks to all guys @cubexxx @pmvcda @saxxon for there excellent work.

1. Suspension
- standard 3-DOF standard plattform mover driven with suspension data


2.Cornering,
- ai-g-seat concept, with 4 air seat pillows left and right driven with two 160 mm pneumatic cylinder, park position in the middle with holes near the middle for venting.Converting lateral acceleration to force according F=m*a.





3.Acceleration
- the same as cornering with 4 pillows in Back, different working only in one direction, park position from start, opposite side open ,additional maybe not even necessary two venting valves on pressure side.Converting only positive longitudinal acc. to force.





4.Brake,
- front-surge system pedals and steering wheel mounted on rails pushes both under braking against the driver. Steering wheel additional mounted with springs,
- belt tensioner producing a pressure on the shoulder. Both converting negative longitudinal acceleration to force.

5. Speed
two radial car ventilation motor driven with a Fet-transistor, supplied from server power supply 12V 80A,
generate speed feeling indirect from wind in open cars

6.H-shifter
with blocking derived from clutch, double hall-sensor and real mechanical sliding coupler with synchron rings.

accessories

The amount of work to build this, has to be insane.

And even with an really high mechanical knowledge i don´t understand what most parts are used for


What i don´t like is the high seatposition. Everytime i am testing an motion rig where the seat is in such a high position compared to the actuators, it felt weird with a high detail loss and Rollmovement feels more like Sway.

Simhub has this already implemented in their software. Nicholas did a great job and is still improving his software.

you are principle right,
that`s the reason I prefer mapping the suspension data to the 4 actuators instead of roll and pitch with little gain adjustment having not the amount of movement.For historic cars sometimes only h-pass filtered

Hi
That's quite a machine, it's impressive. A fine piece of engineering

Hi that's incredible piece of work!

Can you please tell me more for your gseat pneumatic system?
I have also a dof 3p motion platform with diy pneumatic gseat with air bags with servos ( the classic diy system ) but I am not satisfied with the heave effect so I was thinking an active pneumatic system with valves like yours to force air into the same bags as you have with active pump.

1. Do you have an air compressor-pump?
2. What program you use to control the valves?
3. Do you drive them via an arduino?
4. What's the reason to use venting valves?
5. What exactly is 160 mm of valve dimension?
6. Can you tell me exactly the dimensions of the 160 mm valves?

Thank you in advance!

Wow , when you know efforts it takes to fine tune a 4 dof rig, I can't imagine the amount of energy and time needed to build and adjust such a complex machine. Impressive work................

1. no, I use pneumatic cylinder driven with modified SFX 100 actuators
2/3. the program is FlyPt over via 2 arduino mega, controlling 8 motors , you can find both software in this forum
4. the pneumatic cylinder compresses air on one side and expand it on the other side. So it`s important to have the other side always open and vented not getting vacuum. E.g. for the side effect I use one motor for both sides,(telemetry value lateral acceleration) the drive position is in the middle, the cylinder goes up and down, so the wholes in the middle makes the other side open. The park position, meaning switching off the g-seat, one side is manual vented using a valve. Another method would be an additional actuator, plus cylinder for each side in my case meaning a third arduino.
5/6. 160mm is the diameter of the pneumatic cylinder the length or the travel is 200 mm. More volume and travel creates more pressure and offers using more pads.
if you have more questions I could answer this.

Thank you for your fast reply!
Could I use one 150 kgr servo instead of an actuator in order to drive one pneumatic cylinder like yours to inflate one air bag which will lift ( heave ) about 75 kgr?
What is your actual inner cylinder length of travel in order to full inflate the big air bag?
Thanks.

My chosen cylinder diameter is 160mm length is 200 mm, but you can buy different types of them it`s a matter of your invest.This concept is pushing air pads against the driver to simulate g-forces not to lift something.