If you estimate transfer function models using tfest, you can specify how the algorithm treats initial
conditions.
In the System Identification app, set Initial condition to one of the following options:
auto — Automatically chooses
Zero, Estimate, or
Backcast based on the estimation data. If initial
conditions have negligible effect on the prediction errors, the initial
conditions are set to zero to optimize algorithm performance.
Zero — Sets all initial conditions to
zero.
Estimate — Treats the initial conditions as
an estimation parameters.
Backcast — Estimates initial conditions
using a backward filtering method (least-squares fit).
At the command line, specify the initial conditions by using an
estimation option set. Use tfestOptions to create the estimation
option set. For example, create an options set that sets the initial conditions to
zero:
opt = tfestOptions('InitialCondition','zero');