Impedance (State-Space)

R2026b

Dynamic frequency-dependent impedance using state-space representation

Since R2026b

• 

Impedance (State-Space) block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simscape / Battery / Passive

Description

This block models a dynamic frequency-dependent impedance using a state-space representation. These equations define the state-space representation:

$$\begin{array}{c}\frac{dx}{dt}=Ax+Bu\\ y=Cx+Du\end{array}$$

where:

• x is the dimensionless state vector.

• u is the input vector.

• y is the output vector.

• A is the state matrix.

• B is the input matrix.

• C is the output matrix.

• D is the feedthrough or direct transmission matrix.

For custom linear time-invariant impedance responses, configure arbitrary state-space parameters (A, B, C, D).

Note

The heat generation output is derived from the output voltage and the modeled impedance. For complex or frequency-dependent impedance models, this might not accurately represent all loss mechanisms present in real impedance, and it might differ from the actual physical behavior.

Ports

Conserving

+ — Positive terminal

electrical

Electrical conserving port associated with the impedance positive terminal.

- — Negative terminal

electrical

Electrical conserving port associated with the impedance negative terminal.

Parameters

To edit block parameters interactively, use the Property Inspector. From the Simulink^® Toolstrip, on the Simulation tab, in the Prepare gallery, select Property Inspector.

State matrix (A) — State matrix

[0, 1; -1, -2] (default) | scalar | vector | matrix

State matrix, specified as an n-by-n matrix, where n is the number of states.

Input matrix (B) — Input matrix

[0; 1] (default) | scalar | vector | matrix

Input matrix, specified as an n-by-m matrix, where n is the number of states and m is the number of elements in the input vector.

Output matrix (C) — Output matrix

[1, 0] (default) | scalar | vector | matrix

Output matrix, specified as an r-by-n matrix, where r is the number of elements in the output vector and n is the number of states.

Direct transmission matrix (D) — Feedthrough matrix

0 (default) | scalar | vector | matrix

Feedthrough or direct transmission matrix, specified as an r-by-m matrix, where r is the number of elements in the output vector and m is the number of elements in the input vector.

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"batt_lib/Passive/Impedance (State-Space)"

Example: add_block("batt_lib/Passive/Impedance (State-Space)","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2026b