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Cable Robot Simulator [video]
41–50 of 73 posts
Re: Cable Robot Simulator [video]
#42All well and good with the standard little girl model, but what does this look like with ten fat disney tourists? What would the machinery look like to swing 10 or 50 times the weight? (Same question if this is to be used for flight simulators.) Is there a point at which linear hydraulic actuators are easier?
Re: Cable Robot Simulator [video]
#43All well and good with the standard little girl model, but what does this look like with ten fat disney tourists? What would the machinery look like to swing 10 or 50 times the weight? (Same question if this is to be used for flight simulators.) Is there a point at which linear hydraulic actuators are easier?
> All well and good with the standard little girl model
"The software developer Maria Lächele from the 8-person developers team at the Max-Planck Institute is seen amongst others as a passenger of the robot."
Re: Cable Robot Simulator [video]
#44it looks really cool, however with cables wouldn't this limit the amount of "instant Gs" you can generate? it seems motion simulators based on pistons would be able to simulate better things like driving on a bumpy road and sudden changes of direction as there isn't the slack of the cable to take into account or the inertia of a large suspended mass (cables are heavy too) Still given enough space and light enough cab…
> slack
why cables are loaded at 1.5tons. Electric motors have incredible torque and those looked like some honking big motors.
Re: Cable Robot Simulator [video]
#45Earlier quoted context omitted.
I've been working with full motion simulators for the past two years (I even rode that simulator last week at MPI) and I must say that this is plain wrong. This is actually a great fit for VR simulation (see below): > Actual linear acceleration is of limited value in simulation because... Linear acceleration is immensely useful for sudden accelerations. Image a sudden linear acceleration (e.g. a racing car accelerati…
> Rather, you make a linear movement, and THEN you rotate the simulator (if you need to sustain the acceleration). Am I understanding this wrong or are you saying long accelerations can be achieved by accelerating, turn, accelerating, .... etc? Wouldn't the person wearing VR headset feel the turn?
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Re: Cable Robot Simulator [video]
#46The concern I have is that failures in the control software or mechanical failure would have grave consequences. Maybe that's a solved problem and the cable capstans have mechanical arrestors that kick in, etc but the setup looks inherently unstable unless under active computer control (due largely to the crossed cable attach points). This is quite a bit different than a more typical hydraulic setup where an unpowere…
You could make the floor foam blocks or a trampoline, but in concept it's very similar to the Skycam used for NFL games and they are very reliable. I've never heard of one coming down (and they have a lot more travel).
Re: Cable Robot Simulator [video]
#47Earlier quoted context omitted.
I've been working with full motion simulators for the past two years (I even rode that simulator last week at MPI) and I must say that this is plain wrong. This is actually a great fit for VR simulation (see below): > Actual linear acceleration is of limited value in simulation because... Linear acceleration is immensely useful for sudden accelerations. Image a sudden linear acceleration (e.g. a racing car accelerati…
> Rather, you make a linear movement, and THEN you rotate the simulator (if you need to sustain the acceleration). Am I understanding this wrong or are you saying long accelerations can be achieved by accelerating, turn, accelerating, .... etc? Wouldn't the person wearing VR headset feel the turn?
I think hes saying you accelerate forward then tilt back to let gravity help out.
Re: Cable Robot Simulator [video]
#48Earlier quoted context omitted.
I've been working with full motion simulators for the past two years (I even rode that simulator last week at MPI) and I must say that this is plain wrong. This is actually a great fit for VR simulation (see below): > Actual linear acceleration is of limited value in simulation because... Linear acceleration is immensely useful for sudden accelerations. Image a sudden linear acceleration (e.g. a racing car accelerati…
> Rather, you make a linear movement, and THEN you rotate the simulator (if you need to sustain the acceleration). Am I understanding this wrong or are you saying long accelerations can be achieved by accelerating, turn, accelerating, .... etc? Wouldn't the person wearing VR headset feel the turn?
Let's say I want to simulate acceleration going forward. First, there's the burst of forward motion provided by the cable rig, and that can be > 1G. By also gradually flipping the person onto their back you can simulate continued acceleration of 1G because lying on your back feels the same as 1G of acceleration forward. The VR rig would still show you accelerating forward. I am guessing that if the rig also slowly moved back to its original starting point the user wouldn't notice.
Re: Cable Robot Simulator [video]
#49The concern I have is that failures in the control software or mechanical failure would have grave consequences. Maybe that's a solved problem and the cable capstans have mechanical arrestors that kick in, etc but the setup looks inherently unstable unless under active computer control (due largely to the crossed cable attach points). This is quite a bit different than a more typical hydraulic setup where an unpowere…
Around 25 seconds into the video you can see how thick the cable is. I would guess probably an inch thick. With regular wire rope, the breaking strength of that diameter would be in the neighborhood of 80,000lbs[1] with the safe load strength closer to 16,000lbs. I'm guessing with regular maintenance and checking, it would be exceedingly rare to have a mechanical failure.
Additionally, the occupant is harnessed into the chair, bolted into what is essentially a spherical roll cage. Even with failure, I'm guessing there would be a crash but no serious injuries.
[1] - http://www.engineeringtoolbox.com/wire-rope-strength-d_1518....
Re: Cable Robot Simulator [video]
#50This seems like a poor fit for VR motion simulation - actual movement through space is generally unnecessary, you just need to gimbal the platform to simulate accelerations. Actual linear acceleration is of limited value in simulation because you can't maintain that acceleration indefinitely - you run out of room and have to apply an opposite acceleration, which can conflict with the simulation needs. On the other ha…
I've been working with full motion simulators for the past two years (I even rode that simulator last week at MPI) and I must say that this is plain wrong. This is actually a great fit for VR simulation (see below): > Actual linear acceleration is of limited value in simulation because... Linear acceleration is immensely useful for sudden accelerations. Image a sudden linear acceleration (e.g. a racing car accelerati…
That's fair; turning motion into lean gives you best of both worlds - and there is, at least, with this the possibility of up/down accelerations, which are the hardest to pull off convincingly.