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1.The goal is not to build a cheetah, buy to learn from them. One thing to consider is that this team is constrained by materials. What works for an animal will

by bliti 11y ago

1.The goal is not to build a cheetah, buy to learn from them. One thing to consider is that this team is constrained by materials. What works for an animal will likel not transfer directly due to the difference in materials. Harmonics are well absorbed by tissue but the robot may have issues with them. 2. How did you come to this conclusion? Have you built a robot that mimics an animal? If so, may you provide some insight into your discoveries? Robotics programmer/builder here. Always interested in learning about the work of others.

vlasev 11y ago
To your first point, wouldn't a robot like that benefit from staggering the action of the legs? Instead of X impact at one point in time, have X/2 impact at two points in time? Would that create too much strain? For my conclusion in point two, my insight comes from experience of copying animal movement. When I trained parkour my friends and I would copy animal movement from across the whole animal kingdom[1]. Here's an example of quadrupedal movement[2]. A big problem for us bipeds in trying to run like quadrupeds is that our legs tend to be big, long and inflexible, while our arms tend to be much weaker than our legs. The effect of this combination is to make running properly like a an animal which evolved to run on all fours quite difficult. From my own experience, putting my legs more and more forward past my arms (i.e. copying the cheetah), made for a much easier time. If you were to try to run like the robot, with symmetrical action, it would be extremely uncomfortable, because the impact is large at every step. Staggering the action allows for a much smoother run. Make any human run like that and they'll eventually automatically switch to the less impactful staggered run. [1]: https://www.youtube.com/watch?v=Ymg1-Fhl69w https://www.youtube.com/watch?v=Ymg1-Fhl69w [2]: https://www.youtube.com/watch?v=W8oh5Xuy7NA https://www.youtube.com/watch?v=W8oh5Xuy7NA
- rtkwe 11y ago
  Having the back and front legs work as a pair makes the side to side balancing easier. I having them hit separately would require more control and degrees of freedom in the leg to keep the robot from oscillating side to side while running.
vlasev 11y ago
I also forgot to point out that their robot is capable of running in a staggered manner [1] and the results are much cleaner than non-staggered action [2]. You can practically feel the second robot nearly tear itself apart even at lower speeds. [1]: https://www.youtube.com/watch?v=1TXOHAVuS5Q&t=65 https://www.youtube.com/watch?v=1TXOHAVuS5Q&t=65 [2]: https://www.youtube.com/watch?v=chPanW0QWhA https://www.youtube.com/watch?v=chPanW0QWhA

by bliti 11y ago

vlasev 11y ago

To your first point, wouldn't a robot like that benefit from staggering the action of the legs? Instead of X impact at one point in time, have X/2 impact at two points in time? Would that create too much strain? For my conclusion in point two, my insight comes from experience of copying animal movement. When I trained parkour my friends and I would copy animal movement from across the whole animal kingdom[1]. Here's an example of quadrupedal movement[2]. A big problem for us bipeds in trying to run like quadrupeds is that our legs tend to be big, long and inflexible, while our arms tend to be much weaker than our legs. The effect of this combination is to make running properly like a an animal which evolved to run on all fours quite difficult. From my own experience, putting my legs more and more forward past my arms (i.e. copying the cheetah), made for a much easier time. If you were to try to run like the robot, with symmetrical action, it would be extremely uncomfortable, because the impact is large at every step. Staggering the action allows for a much smoother run. Make any human run like that and they'll eventually automatically switch to the less impactful staggered run. [1]: https://www.youtube.com/watch?v=Ymg1-Fhl69w https://www.youtube.com/watch?v=Ymg1-Fhl69w [2]: https://www.youtube.com/watch?v=W8oh5Xuy7NA https://www.youtube.com/watch?v=W8oh5Xuy7NA

rtkwe 11y ago
Having the back and front legs work as a pair makes the side to side balancing easier. I having them hit separately would require more control and degrees of freedom in the leg to keep the robot from oscillating side to side while running.

vlasev 11y ago

I also forgot to point out that their robot is capable of running in a staggered manner [1] and the results are much cleaner than non-staggered action [2]. You can practically feel the second robot nearly tear itself apart even at lower speeds. [1]: https://www.youtube.com/watch?v=1TXOHAVuS5Q&t=65 https://www.youtube.com/watch?v=1TXOHAVuS5Q&t=65 [2]: https://www.youtube.com/watch?v=chPanW0QWhA https://www.youtube.com/watch?v=chPanW0QWhA