Is it possible for the 'auto' setting of the Start/Stop time under Estimation Options to directly pick the start/end values from the 'time' dataset in Simulink Parameter Estimation 1.2.3(R2008b)?

I am working on an estimation project in Simulink Parameter Estimation 1.2.3(R2008b).

Under 'Estimation Options', I observe that the 'Start Time' and 'Stop Time' parameters are set to 'auto' by default.

I would like the 'auto' setting to pick start/stop values directly from the ‘time’ dataset in order to simulate the estimation.

Answer 1

[MathWorks Support Team]

With the 'auto' setting, Simulink Parameter Estimation uses the settings from the Simulink model.

Simulink Parameter Estimation has additional logic to determine the exact simulation time for estimations.

For example, if the time information in the experimental data set is shorter, it will only simulate up to that time. Conversely, if the stop time in Simulink is smaller than the time in the data, it will only simulate to the stop time specified in the Simulink model.

The logic is approximately:

Texp < Tsim => simulate to Texp

Texp > Tsim => simulate to Tsim

'Texp' is stop time in the 'time' dataset.

'Tsim' is Simulink stop time.

The above concept is a design decision that is made.

In majority of the cases the experimental data is much longer and we only want to use a portion of it (as specified by the stop time in the Simulink model) for estimation.