ImplDerivative
This block outputs the derivative of its input signal. The solver uses a multi-order, multi-step BDF, Backward Differentiation Formula to estimate the derivative. The accuracy of this method is higher than the "du/dt" block which uses an order 1 method. The accuracy can be improved by reducing the solver error tolerances.
Library
Dynamical
Description
The ImplDerivative block outputs the derivative of its input signal. The solver uses a multi-order, multi-step BDF (backward differentiation formula) method to estimate the derivative. The accuracy of this method is higher than the "du/dt" block which uses an order 1 method. The accuracy can be improved by reducing the solver error tolerances.
Parameters
| Name | Label | Description | Data Type | Valid Values |
|---|---|---|---|---|
x0 | Initial input (guess value) | The initial value of the state is used as an initial guess to help the solver converge toward the solution. This is especially useful at the start of the simulation. | Matrix | |
xd0 | Initial output (guess value) | The initial value of the state derivative is used as an initial guess to help the solver converge. The very first output of the block is the initial derivative vector. | Matrix |
Ports
| Name | Type | Description | IO Type | Number |
|---|---|---|---|---|
Port 1 | explicit | output | 1 | |
Port 2 | explicit | input | 1 |
Advanced Properties
| Name | Value | Description |
|---|---|---|
always active | yes | |
direct-feedthrough | no | |
zero-crossing | no | |
mode | no | |
continuous-time state | yes | |
discrete-time state | no |