AESL/Damped Harmonic Osciallator scaled.AESL

   1 IDENTIFICATION DIVISION
   2 PROGRAM-ID Damped_Oscillator
   3
   4 ENVIRONMENT DIVISION
   5 ENGINE Anabrid-THAT
   6 TIMEBASE 1ms
   7 REQUIRES COEFFICIENT 5
   8 REQUIRES INTEGRATOR 2
   9 REQUIRES INVERTER 1
  10 REQUIRES SUMMER 2
  11
  12 DATA DIVISION
  13 OUTPUT OUTPUT.U y
  14 ALIAS COEFFICIENT.1 InitialPosition
  15 ALIAS COEFFICIENT.2 InitialSpeed
  16 ALIAS COEFFICIENT.3 SpringForce
  17 ALIAS COEFFICIENT.4 Damping # linear to speed
  18 ALIAS COEFFICIENT.5 Mass # 1 / mass
  19
  20 PROGRAM DIVISION
  21 # Colors being used for wiring
  22 # - black:  y0
  23 # - blue:   y0’
  24 # - green:  y0’’
  25 # - yellow: y’’, y’
  26 # - red:    y
  27 -1 -> InitialPosition -> -y0 # -initial position of the mass
  28 -1 -> InitialSpeed -> y0s’ # y’ is scaled to be within -1..+1
  29 +1, y0s’, y0s’ -> Summer.1 -> y0’
  30
  31 y’’, IC:y0’ -> INTEGRATOR.1 -> -y’
  32 -y’,IC:-y0 -> INTEGRATOR.2 -> y
  33 y -> SpringForce -> S*y # springforce times displacement
  34 -y’ -> INVERTER.1 -> y’
  35 y’ -> Damping -> D*y’ # damping times speed
  36 10:S*y, 10:D*y’ -> SUMMER.2 -> -(Dy’+Sy)
  37 -(Dy’+Sy) -> Mass -> -1/m*(Dy’+Sy)=y’’
  38
  39 OPERATION DIVISION
  40 MODE REPEAT
  41 OP-TIME 57ms