4DOF pr 3DOF motion platform

[rtopinka]

We released motion platform which can be used for FS or X-Plane as well as for racing simulators at www.motion-sim.com Let us know, what you think. regards, Radek

[darkdud]

Radek, are you reselling Force Dynamics simulators? What is the software you use between MSFS/X-plane and your motion sim?

[Roland]

We released motion platform which can be used for FS or X-Plane as well as for racing simulators at www.motion-sim.com Let us know, what you think. regards, Radek

Hi Radek,

I think you guys have developed a great product. The videos show very good actuator response. Definitely suitable for flight sim motion, especially the higher point of rotation will help reduce false motion cues.

I'm curious about some aspects of the design, are you willing to discuss some of the design background?

Roland

[douwe]

Interesting Yaw design (helicopter sim)
http://www.mijnalbum.nl/index.php?m=albumview&a=1&key=3OQYHHYL&album=QJ3VL6O3
Leg design like HI6SIM MK IV (idea's) without weigth compensation (see power consumption).
http://www.mijnalbum.nl/index.php?m=albumview&a=1&key=ILEJ83BI&album=QJ3VL6O3
After a series of experiments were chosen with the concept of asynchronous transfer and toothed belts.
Had to be solved using a servo motor, especially the control of very low revs.
Finally, with the use of smart drives and a specially designed control system was hence currently working together on a racing car simulator www.motion-sim.com ,
which uses more advanced version of the mobile base with greater momentum.
The result is an almost noiseless compact platform that is capable of operation without the need for special demands on its operation.
http://www.mijnalbum.nl/index.php?m=albumview&a=1&key=ESWQ3PDM&album=QJ3VL6O3
Douwe

[douwe]

I am missing the included pictures?, try again:
http://www.mijnalbum.nl/GroteFoto-3OQYHHYL.jpg
http://www.mijnalbum.nl/GroteFoto-ILEJ83BI.jpg
http://www.mijnalbum.nl/GroteFoto-ESWQ3PDM.jpg

[Roland]

I had not seen some of those pictures. Thanks.

I'm still wondering how they get the equal and fast response in upward and downward direction if there is no weight balance system, as the required motor torque for up and down is hugely different with 300kg payload unbalanced system. The required motor torque would need to be 2~3 times bigger than a balanced system. I'm already getting 2kW peaks in my 160kg balanced system. They spec 2.5kW max. Yet the videos show great response. I can't seem to figure it out.

I would also like to know how they get the three actuators sufficiently stiff in inward direction. Due to the big actuator travel, the actuators need to be able to move inward around 10 ~ 15 cm at the extremes. But this movement must also be dampened, to avoid wiggling. I don't see the system how they solved this.

The system seems to move reasonably quiet. But I see they use standard linear bearings. I tested my linear actuator design last summer with these type of bearings, and found these to make lots of noise during fast movement.

The toothed belt makes good sense. My design experiments failed here, as I used standard V-belt that kept slipping under the enormous force that was required.

I would appreciate if Radek will answer my questions. Apologies for my curiosity. I can't help it :-)