First, wear your dust mask. Who knows where these machines have been?

  • WaterWaiver@aussie.zone
    link
    fedilink
    English
    arrow-up
    15
    ·
    edit-2
    7 months ago

    Very pretty stuff. I particularly recommend Ken Shirriff’s Reverse-engineering the mechanical Bendix Central Air Data Computer:

    He goes into detail about how non-linear equations are implemented using shaped cam gears (and how such functions can be difference-encoded against linear forms). It’s insane.

    And because it’s analog, there is no quantisation, rounding errors, floating point errors.

    Eh, I’d say that runout and stiction are their own demons with potentially more bias than those error types :) Not to mention temperature sensitivity – hot days will give different answers to the equations!

    • towerful@programming.dev
      link
      fedilink
      English
      arrow-up
      6
      ·
      7 months ago

      Eh, I’d say that runout and stiction are their own demons with potentially more bias than those error types :) Not to mention temperature sensitivity – hot days will give different answers to the equations!

      Ha, oh yeh. Good point.
      A bit of dirt throwing off the calculations.