[Octave-bug-tracker] [bug #59441] [octave forge] (control) 'stepDataOptions' function not available

[Torsten Lilge]

Follow-up Comment #5, bug #59441 (project octave):

To my knowledge, there are no options for step which would give equivalent
results as the stepDataOptions.

For the value "InputOffset" (only suitable for stable systems), the static
response has to be computed as initial value for the step of overall height
"InputOffset"+"StepAmplitude". Therefore, a workaround could look like


% example system
sys = tf([1 2],[1 1 1]);
InputOffset = 1;
StepAmplitude = 2;

% the modified "step" function
if (InputOffset == 0 || isstable (sys))
  
  % system in state space
  sys_ss = ss (sys);

  % steady state as initial value of step
  x_steady_state = -inv(sys_ss.a)*sys_ss.b*InputOffset

  % simulate the step
  [y,t,x] = step (sys);  % only to get a suitable t vector
  lsim (sys, StepHeight*ones(size(t)), t, x_steady_state)

endif



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