6 ms·

TLDR: Active damping

proaralyst 7y ago
Except if you read the article you'd realise this is not active damping. They're optimising the movements using a physical model so that they don't need active damping at all.
- shawnz 7y ago
  What they are saying in the article is that they are optimizing the movements using a physical model so that they don't need passive damping.. but isn't that exactly what active damping is?
  - lawlessone 7y ago
    it's preparing the movements in advance via simulation, is it still active damping if it has done that?
    - Retric 7y ago
      They actually mention active damping in the video so yes. It’s less resilient as ware will make the robots inconsistent over time, but the tradeoff for a less costly robot with fewer sensors may be worth it.
    - faceplanted 7y ago
      I don't think so, no. It would need to be reactive to active damping, and as the article says, there aren't any onboard sensors, so if you push them they'll wobble like crazy.
  - rtkwe 7y ago
    It's a tricky distinction because the program is changed to dampen the vibrations but it's all baked into the program at start it seems. I'd say it's not active because it doesn't dynamically monitor and change the program. In theory you could perturb these animatronics in such a way that their damping motions actually increase the vibrations.
  - htgb 7y ago
    I think of the term optimal control [1] given that problem description. Maybe there's some overlap in the definitions? [1] https://en.wikipedia.org/wiki/Optimal_control https://en.wikipedia.org/wiki/Optimal_control
- logfromblammo 7y ago
  It's not active damping, it's predictive, pre-computed powered damping. If you change the physical behavior of the robot, such as by heating or cooling its arm rods, or by changing the mass of its end-weights, the pre-computed damping movements will be less accurate, and the wobble may return. Active damping would require sensors and a more complicated microcontroller on the robot, rather than just looped playback from a ROM. Cheaper smooth-moving robots mean more animatronic elements can be put in your feature within a given budget.
vernie 7y ago
Yea you definitely DR
xadhominemx 7y ago
You’re getting downvoted but you’re right!

Except if you read the article you'd realise this is not active damping. They're optimising the movements using a physical model so that they don't need active damping at all.

shawnz 7y ago
What they are saying in the article is that they are optimizing the movements using a physical model so that they don't need passive damping.. but isn't that exactly what active damping is?
- lawlessone 7y ago
  it's preparing the movements in advance via simulation, is it still active damping if it has done that?
  - Retric 7y ago
    They actually mention active damping in the video so yes. It’s less resilient as ware will make the robots inconsistent over time, but the tradeoff for a less costly robot with fewer sensors may be worth it.
  - faceplanted 7y ago
    I don't think so, no. It would need to be reactive to active damping, and as the article says, there aren't any onboard sensors, so if you push them they'll wobble like crazy.
- rtkwe 7y ago
  It's a tricky distinction because the program is changed to dampen the vibrations but it's all baked into the program at start it seems. I'd say it's not active because it doesn't dynamically monitor and change the program. In theory you could perturb these animatronics in such a way that their damping motions actually increase the vibrations.
- htgb 7y ago
  I think of the term optimal control [1] given that problem description. Maybe there's some overlap in the definitions? [1] https://en.wikipedia.org/wiki/Optimal_control https://en.wikipedia.org/wiki/Optimal_control
logfromblammo 7y ago
It's not active damping, it's predictive, pre-computed powered damping. If you change the physical behavior of the robot, such as by heating or cooling its arm rods, or by changing the mass of its end-weights, the pre-computed damping movements will be less accurate, and the wobble may return. Active damping would require sensors and a more complicated microcontroller on the robot, rather than just looped playback from a ROM. Cheaper smooth-moving robots mean more animatronic elements can be put in your feature within a given budget.

vernie 7y ago

Yea you definitely DR

xadhominemx 7y ago

You’re getting downvoted but you’re right!