modifyStateSpaceTransferFunction

R2026b

Modify system representation for state-space and transfer function of fractional-order equivalent circuit model

Since R2026b

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Syntax

eisfom = modifyStateSpaceTransferFunction(eisfom,Name=Value)

Description

eisfom = modifyStateSpaceTransferFunction(eisfom,Name=Value) modifies the system representation for the state-space and transfer function of the fractional-order equivalent circuit model, eisfom, using one or more name-value arguments.

Note

Use this function to change the Oustaloup and Padé approximation properties of your EISModel object and regenerate the corresponding state-space and transfer function representations. Setting the OustaloupOrder, OustaloupFrequencyRange, and PadeApproximant properties directly does not update the system representation.

example

Examples

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This example shows you how to modify the state-space representation of an EISModel object. The state-space representation of the second EISModel object has a higher order compared to the state-space representation of the first EISModel object.

Create an EISModel object with default property values.

eisfom1 = eisModel;

Create a second EISModel object by modifying the state-space representation of the first EISModel object. Use the modifyStateSpaceTransferFunction function and specify the order of the Oustaloup approximation for constant phase elements and semi-infinite Warburg impedances.

eisfom2 = modifyStateSpaceTransferFunction(eisfom1,"OustaloupOrder",2);

Verify the state-space representation of the two EISModel objects.

eisfom1.StateSpace;
ans =  
 
struct with fields:
 
A: [13×13 double]
B: [13×1 double] 
C: [-0.3500 0 0 0 1 0 0 0 0.1000 0 0 0 0.0100] 
D: 0.3750 

eisfom2.StateSpace;
ans =  
 
struct with fields:
 
A: [19×19 double] 
B: [19×1 double] 
C: [-5.4469e-04 0 0 0 0 0 220.5048 0 0 0 0 0 999.9984 0 0 0 0 0 0.1737] 
D: 0.0531

Input Arguments

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Fractional-order equivalent circuit model, specified as an EISModel object.

Name-Value Arguments

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Specify optional pairs of arguments as Name1=Value1,...,NameN=ValueN, where Name is the argument name and Value is the corresponding value. Name-value arguments must appear after other arguments, but the order of the pairs does not matter.

Example: modifyStateSpaceTransferFunction(myEISModel,OustaloupOrder=2)

Order of the Oustaloup approximation for constant phase elements and semi-infinite Warburg impedances.

Data Types: double

Frequency range, in Hertz, used in approximating constant phase elements and semi-infinite Warburg impedances.

Data Types: double

Order of the Pade approximation for finite-space and finite-length Warburg impedances.

Data Types: double

Version History

Introduced in R2026b

See Also

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