The Slew Rate Limiter block limits the slew rate of its output signal to the range $\left[\mathrm{Falling}\,\mathrm{Rising}\right]$. To ensure this for arbitrary inputs and in order to produce a differentiable output, the input is numerically differentiated with derivative time constant $T_d$. Smaller time constant $T_d$ means nearer ideal derivative. The user has to choose the derivative time constant according to the nature of the input signal.

The Signal Size parameter assigns the dimension of the input and output connectors.

$\frac{{\mathrm{dy}}_i}{\mathrm{dt}}\=\{\begin{array}{cc}\mathrm{smooth}\left(1\,\mathrm{noEvent}\left(\min \left(\mathrm{Rising}\,\max \left(\mathrm{Falling}\,\frac{u_i-y_i}{T_d}\right)\right)\right)\right)& \mathrm{strict}\\ \mathrm{smooth}\left(1\,\min \left(\mathrm{Rising}\,\max \left(\mathrm{Falling}\,\frac{u_i-y_i}{T_d}\right)\right)\right)& \mathrm{otherwise}\end{array}$

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.