Jacobian
Numerically computes the Jacobian of a non-linear function, f(x,u), with respect to x.
Library
MATLAB Command Line
Click to copy the following command line to the clipboard. Then paste it in the MATLAB Command Window:
qc_open_library('quarc_library/Continuous')Description
The Jacobian block numerically computes the Jacobian of a non-linear function, f(x,u), with respect to x.
The output function, f(x,u), must be implemented by the user using Simulink blocks. To enter the output function, f(x,u), double-click on the block to open the block parameters dialog. Then click on the button to open the subsystem in which the output function should be implemented. Be careful to get the dimensions of signals correct.
| At no time should the input and output ports within the output function subsystem be deleted. Doing so will break the block! |
Input Ports
x
The input signal to the system, with respect to which the partial derivatives are calculated.
u
Additional inputs with respect to which the derivatives are not calculated.
Output Ports
J
The estimated Jacobian of the output function.
Data Type Support
This block accepts input of type double. The output is of type double.
Parameters and Dialog Box
Type of perturbation
Whether the values specified in the Perturbations field are added to x or whether they are treated as percentages that are multiplied by x.
Perturbations
The perturbation values for each element of x used when calculating the partial derivatives of the output function. If there are fewer elements in this field than elements of x then the last element is replicated. Hence, a scalar value will be applied to all elements of x.
How these values are interpreted depends on the Type of perturbation parameter.
Targets
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Target Name |
Compatible* |
Model Referencing |
Comments |
|---|---|---|---|
|
Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
Last fully supported in QUARC 2018. |
|
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Rapid Simulation (RSIM) Target |
Yes |
Yes |
|
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S-Function Target |
No |
N/A |
Old technology. Use model referencing instead. |
|
Normal simulation |
Yes |
Yes |
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