7 ms·

radicalbyte, you're absolutely right that the use of fans in Micromouse increases the traction, and therefore the speed at which the maze is solved. Suction all

radicalbyte, you're absolutely right that the use of fans in Micromouse increases the traction, and therefore the speed at which the maze is solved. Suction allows for impressive performances. However, a small caveat that might be worth considering is that while the suction indeed increases speed, it might be more accurate to say that it primarily improves acceleration instead of car speed: The issue often lies with achieving rapid acceleration rather than with maintaining high speed. Even systems with relatively low traction can reach high speeds given enough time and distance, but the ability to accelerate quickly is crucial in competitions like Micromouse.

HPsquared 3y ago
Speed = ∫(acceleration) dt
- anikan_vader 3y ago
  Sure, but once you have speed you can use aerodynamics to get grip (e.g., F1 cars). So this is really only relevant if you need acceleration from low speed.
  - AmericanChopper 3y ago
    F1 has featured a car that used a fan to generate downforce. https://en.m.wikipedia.org/wiki/Brabham_BT46 https://en.m.wikipedia.org/wiki/Brabham_BT46 An issue with aero features (other than not producing their effects at low speed) is their ability to stall. Ground effect was especially dangerous (back when high-ground-effect designs were allowed) because if it stalls during a high speed corner (say from driving over a bump, like a kerb maybe) you can instantaneously lose a huge amount of downforce, which is obviously quite dangerous.
- epolanski 3y ago
  Exactly, thus you can simply integrate over a longer time span. But if you want to increase the acceleration you need traction, your tyres need to be glued to the asphalt. Since you don't have aerodynamic pressure at those speeds you need to suck the vehicle to the ground.
- westurner 3y ago
  Derivatives of relative displacement as defined by a distance metric in a [e.g. metric tensor] space: Length = Point2 - Point1 Length * Time^-1 = Velocity or Speed Length * Time^-2 = Acceleration Length * Time^-3 = Jerk Length * Time^-4 = Snap or Jounce Length * Time^-5 = Crackle Length * Time^-6 = Pop Displacement (geometry) > Derivatives: https://en.wikipedia.org/wiki/Displacement_(geometry)#Derivatives https://en.wikipedia.org/wiki/Displacement_(geometry)#Deriva... Fourth, fifth, and sixth derivatives of position: https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_derivatives_of_position https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_deriv...
  - jameshart 3y ago
    Something weird about this is that humans very often ascribe the sensation of d^ns/dt^n, to feeling d^n-1s/dt^n-1. So people will say that something which accelerates quickly is 'fast'. Or they will say, when they feel themselves initially being pressed back into their seat as a plane starts its takeoff roll, that they are experiencing 'acceleration' when what they are experiencing is actually jerk. The thing is, you can't actually feel motion at a constant speed - so the only thing that tells you you are acquiring speed is your body's experience of acceleration - so when you feel yourself accelerating, you associate that with speed. Likewise, your body also can't really tell the difference between constant acceleration and just... being at a different angle, and maybe a bit heavier than normal. So it's when you experience changes in the apparent direction of 'down' and the overall 'weight' you're feeling that you think 'oh, we're accelerating'. My favorite way to get a sense of what acceleration, jerk and snap feel like is to focus on what happens when you're in a car that's braking hard. You're decelerating at a relatively constant rate while the brakes are applied - it feels as if 'down' is pointing slightly forward, meaning you'd be sliding off the seat if it weren't for your seatbelt holding you back. When the car finally stops though, there's a very abrupt change in acceleration - a 'jerk'. 'Down' switches to pointing straight down again, very quickly. You're pulled back into your seat. That's jerk. And specifically the sudden onset of that swing in what direction 'down' is pointing, and then its rapid disappearance is snap. Your body feels like it's being 'jerked' around when the car stops precisely because that motion has high snap - you experience a sudden high amount of jerk, then the jerk ends.
hanniabu 3y ago
[flagged]
- 0xDEF 3y ago
  So many old polite people on the Internet are going to be accused of being AI chatbots.
  - ojbyrne 3y ago
    Old polite people who can spell.
  - hanniabu 3y ago
    It has nothing to do with being polite and more to do with a recap of context, using similar language, before responding.

HPsquared 3y ago

Speed = ∫(acceleration) dt

anikan_vader 3y ago
Sure, but once you have speed you can use aerodynamics to get grip (e.g., F1 cars). So this is really only relevant if you need acceleration from low speed.
- AmericanChopper 3y ago
  F1 has featured a car that used a fan to generate downforce. https://en.m.wikipedia.org/wiki/Brabham_BT46 https://en.m.wikipedia.org/wiki/Brabham_BT46 An issue with aero features (other than not producing their effects at low speed) is their ability to stall. Ground effect was especially dangerous (back when high-ground-effect designs were allowed) because if it stalls during a high speed corner (say from driving over a bump, like a kerb maybe) you can instantaneously lose a huge amount of downforce, which is obviously quite dangerous.
epolanski 3y ago
Exactly, thus you can simply integrate over a longer time span. But if you want to increase the acceleration you need traction, your tyres need to be glued to the asphalt. Since you don't have aerodynamic pressure at those speeds you need to suck the vehicle to the ground.
westurner 3y ago
Derivatives of relative displacement as defined by a distance metric in a [e.g. metric tensor] space: Length = Point2 - Point1 Length * Time^-1 = Velocity or Speed Length * Time^-2 = Acceleration Length * Time^-3 = Jerk Length * Time^-4 = Snap or Jounce Length * Time^-5 = Crackle Length * Time^-6 = Pop Displacement (geometry) > Derivatives: https://en.wikipedia.org/wiki/Displacement_(geometry)#Derivatives https://en.wikipedia.org/wiki/Displacement_(geometry)#Deriva... Fourth, fifth, and sixth derivatives of position: https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_derivatives_of_position https://en.wikipedia.org/wiki/Fourth,_fifth,_and_sixth_deriv...
- jameshart 3y ago
  Something weird about this is that humans very often ascribe the sensation of d^ns/dt^n, to feeling d^n-1s/dt^n-1. So people will say that something which accelerates quickly is 'fast'. Or they will say, when they feel themselves initially being pressed back into their seat as a plane starts its takeoff roll, that they are experiencing 'acceleration' when what they are experiencing is actually jerk. The thing is, you can't actually feel motion at a constant speed - so the only thing that tells you you are acquiring speed is your body's experience of acceleration - so when you feel yourself accelerating, you associate that with speed. Likewise, your body also can't really tell the difference between constant acceleration and just... being at a different angle, and maybe a bit heavier than normal. So it's when you experience changes in the apparent direction of 'down' and the overall 'weight' you're feeling that you think 'oh, we're accelerating'. My favorite way to get a sense of what acceleration, jerk and snap feel like is to focus on what happens when you're in a car that's braking hard. You're decelerating at a relatively constant rate while the brakes are applied - it feels as if 'down' is pointing slightly forward, meaning you'd be sliding off the seat if it weren't for your seatbelt holding you back. When the car finally stops though, there's a very abrupt change in acceleration - a 'jerk'. 'Down' switches to pointing straight down again, very quickly. You're pulled back into your seat. That's jerk. And specifically the sudden onset of that swing in what direction 'down' is pointing, and then its rapid disappearance is snap. Your body feels like it's being 'jerked' around when the car stops precisely because that motion has high snap - you experience a sudden high amount of jerk, then the jerk ends.

hanniabu 3y ago

[flagged]

0xDEF 3y ago
So many old polite people on the Internet are going to be accused of being AI chatbots.
- ojbyrne 3y ago
  Old polite people who can spell.
- hanniabu 3y ago
  It has nothing to do with being polite and more to do with a recap of context, using similar language, before responding.