simsd (System Identification Toolbox)

Simulate models with uncertainty.

Syntax

```
simsd(m,u)
simsd(m,u,N,noise,Ky)
```

Description

u is an iddata object containing the inputs. m is a model given as any idmodel object. N random models are created, according to the covariance information given in m. The responses of each of these models to the input u are computed and graphed in the same diagram. If noise = 'noise', noise is added to the simulation, in accordance with the noise model of m, and its own uncertainty. Ky denotes the output numbers to be plotted (default all)

The default values are

```
N = 10
noise = 'nonoise'
```

Examples

Plot the step response of the model m and evaluate how it varies in view of the model's uncertainty.

step1 = [zeros(5,1); ones(20,1)];
simsd(m,step1)

See Also

sim

sim size