Notice How Many Stick Combinations Does It Take To Fly 3d Helicopter In All Orientations

Discussion in 'The Chat Room' started by smakmeharder, Jul 3, 2014.

By smakmeharder on Jul 3, 2014 at 10:12 PM
  1. smakmeharder

    smakmeharder Administrator

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    Ok here is one for the mathematicians. Assuming the helicopter can be put in many different positions while flying ie... flying forward, flying backward, flying on an angle, tick stock, sideways tick tocks. upside down in all orientations etc... How do we calculate how many stick combinations we have to know in order to fly all these maneuvers? Can this be calculated? If so how?


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Discussion in 'The Chat Room' started by smakmeharder, Jul 3, 2014.

    1. simon

      simon Well-Known Member

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      A very tricky question, at least I thought so at first, I thought it was some crazy integral in Riemann space, but it is really just the sum of the stick positions,
      My radio has a resolution of 2^11, so the possible stick combinations is just PSC=4 x 2^11 =8192 possible stick combinations (with my radio). And that will make your heli do anything.
      Simon
       
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    2. smakmeharder

      smakmeharder Administrator

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      I Knew it - I knew you would be the first to answer @simon ! .. awesome answer but just one question. Where is the number 4 derived from?
       
    3. ZEN RC

      ZEN RC Well-Known Member

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      ...... blink blink ........
       
    4. Jeff_Bradley

      Jeff_Bradley Well-Known Member

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      Is this guy a geeeeek
       
    5. simon

      simon Well-Known Member

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      degrees of geometric freedom, each controlled by a stick ,
      1 elevator
      2 roll
      3 yaw
      4 pitch (cyclic),

      I am supposing that throttle is constant (in stunt 2), maybe an over simplification.
      simon
       
    6. simon

      simon Well-Known Member

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      it's also the the transition from one address (2^11,2^11,2^11,2^11) to the next address (to perform a given maneuver), the combinations would be nearly infinite
      Simon
       
      Last edited: Jul 4, 2014
    7. simon

      simon Well-Known Member

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      and proud of it, but I wish I was a better pilot
      simon
       
    8. smakmeharder

      smakmeharder Administrator

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      Right now I understand - well done. Another question... because the pitch can be either positive or negative making two totally different dimensions of flight, would that qualify as another position not considered and double the amount of stick combinations? (ie one negative the other positive) So taking your formula

      Total PSC = (PSC=4 x 2^11 (positive pitch)) + (PSC=4 x 2^11 (negative pitch)) = 16 384?

      This is negating the effect of transitions - at the moment anyway...
       
    9. feral

      feral Well-Known Member

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      Holy shiz you guys are smart I have absolutely no frikken idea what the hell all that mumbo jumbo is
       
    10. smakmeharder

      smakmeharder Administrator

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      Hey @feral, if you can fly all orientations, you are doing it all without realizing it! So that make s you just as smart without any effort! lol...
       
    11. feral

      feral Well-Known Member

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      Cant do em all bud when all axis' s get to 45degrees she bites the dirt
       
    12. simon

      simon Well-Known Member

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      No, It's just pitch, includes both positive and negative
       
    13. simon

      simon Well-Known Member

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      At high speed, they are the best dirt naps
      Simon
       
    14. feral

      feral Well-Known Member

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      I prefer the high headspeed high groundspeed crashes it just like there was 1kg of high explosive stuffed in there and crash hit the red button
       
    15. simon

      simon Well-Known Member

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      when it's not my machine that would cool, I could be weeping if it were me.
      Simon
       
    16. simon

      simon Well-Known Member

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      you can really look at this in a heap of ways, I'm now thinking moves as an integral so it takes the form of some Markov chain (from the perspective of someone viewing the flight), or some sort of bifurcation diagram - check 'em both out @smakmeharder
      simon
       
    17. smakmeharder

      smakmeharder Administrator

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      It really blows my mind, when you think of it we need to have the ability to respond with any 8192 stick positions to control any helicopter position at any point in time. That is crazy! No wonder learning to fly is so hard!

      I remember when i was learning and trying to do figure 8s in my small backyard with my blade 400. I had to focus that hard it felt like I just sat for a difficult an exam once after puting through say 3 packs. Now i know why.. With that many combinations, the neurons were carving many new paths - so it is actually mentally exhausting when you are learning. For me that became part of the addiction!
       
    18. smakmeharder

      smakmeharder Administrator

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      I will don't worry @simon . I find this fascinating.. I don't know if anyone has ever bothered with this before!..
       
    19. simon

      simon Well-Known Member

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      there are so many pathways for sure, and it's the transition from one address to the next for the desired response. Crazy. I might have more of a think about this problem and see if I can get a better, more measured handle on this
      Simon
       

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