High angle & Displacement 6DOF

[Riton]

wow !! it's really beautiful!
it is a kind of composite materials? rigid foam?
alveolar?

[pipis2014]

... Keeping track of the progression of your project from the beginning , i just have to say this: please keep amazing us with the quality of your work …

[DoctorD]

Thank you both for your really kind comments.
Made my day

[billo2404]

Grazie per la tua spiegazione, sei stato molto chiaro.
Oggi finalmente mi sono arrivate le teste a snodo da 16mm e posso ridurre la distanza a 50 mm senza problemi
Appena correggo il disegno ti faccio vedere come viene grazie ai tuoi consigli.
Per quanto riguarda il tuo sim credevo che oltre ad aver fatto un 6 dof mostruoso riguardo la postazione non ci sarebbe stato molto da fare e invece mi sbagliavo di grosso: con quello schermo se ci fosse un premio come simulatore dell' anno vinceresti senza neanche iscriverti.
Non vedo l'ora di vederlo finito
Non hai paura che le zone dove le immagini si sovrappongono creino qualche problema in fase di movimento a causa delle vibrazioni?


Thank you for your explanation, you have been very clear.Today I finally got the rod ends from 16 mm and can reduce the distance 50 mm without problems.Just correct the design I'll show you how it is thanks to your advice.
As for your sim believed that besides having a 6 dof monstrous about the workplace there would be plenty to do and instead I was wrong big: with that screen if there was an award for the year you'd take Simulator without even signing up.
I can't wait to see him finish.
You're not afraid that areas where the images overlap to create some trouble being the movement because of the vibration?

[DoctorD]

Heya Billo,
Looking forward to seeing your new plans. I bet you're excited to start building!

I'm very conscious about how the image overlap and warping will handle the stress and flex of the projection cylinder. I am doing everything I can to make the projection system as rigid and lightweight (reduce deflections). Another thing I will be doing is dampening the connection between the projection cylinder and the rest of the motion platform. This should help to reduce the severity of the vibrations passed onto the projectors and screen.

It's going to be a bit of trial and error, but I'm fairly confident I can make it work.
I'll keep you informed

[pipis2014]

U may need to consider a lightweight aluminum roll cage to mount rigidly both screen body and projectors on your 6dof baseplate.

[DoctorD]

Hi pipis
I think rigidity for the projection screen-to-platform connection might cause a lot of vibration to pass through to the projectors and screen. What I'm trialing is a lightweight shock absorption system that will hopefully take out a lot of the sharp/high intensity vibration. The connections will be lightweight, but tunable so I can balance the fore-aft weighting of the projection mass.

[pipis2014]

U are absolutely right. You have to solve two separate problems though.

First and most important is that you have to isolate the projectors from the vibrations.As for the screen ... is it so delicate that you need to protect it from vibrations too?

You can get ready made vibration isolators/dampeners for that (or even experiment with neoprene blocks).

Second is that you have to ensure perfect and constant(without delay) alignment between the projector-screen-seat system so you don't have to encounter motion sickness issues.

If your brain gets different (not in accordance to one another... eg with a slight delay due to the vibration dampening contraption that you will decide to use) "movement" inputs from image and motion then you might get dizzy depending on how sensitive your center of balance is.

I hope I didn't bring more confusion.

[DoctorD]

Hello and happy Sunday,

Your thoughts are certainly valid Mr Pipis
I believe that my projection screen and projection mount (the same entity) will be more than rigid enough to keep vibrations to an absolute minimum if it is dampened accordingly. The system I will am using is almost a complete replica of the system I used on a large scale UAV fuselage for the very same reason. That worked extremely well, keeping the weight down to an absolute minimum and was VERY rigid.
This screen has more than twice the thickness of the UAV, more connection points, has the benefit of being cylindrical in shape (like Roman arches) and I am also using a higher grade of carbon/glass fibre matting (thanks to a very helpful local supplier who was more than happy to give me some carbon for free).
The screen certainly won't be delicate after it's finished

The second point that you make is very interesting. It will be a delicate balance between keeping latency to a minimum, whilst trying to protect the projector hardware and keeping transferred vibrations as low as possible.
I'll keep you posted!

[Riton]

new?
I'm a fan of the simulator, soon a video game?