MATLAB Fault Analysis - "Continuous-time signals support faults only if its destinations are discrete" Error Command

Question

Krishna 2024-4-13

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https://ww2.mathworks.cn/matlabcentral/answers/2106421-matlab-fault-analysis-continuous-time-signals-support-faults-only-if-its-destinations-are-discret

回答： MULI 2024-9-13，12:24

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I am trying to trigger a fault in MATLAB for my simulation, so I can get some disturbance in my current simulation outputs. However, it is not working and I am getting the following error:

Fault Inport block 'Fault_Analysis_FaultModel/output_fault/Fault Inport' is set to read/override invalid signal on the Outport number 1 of block 'Fault_Analysis/Current'.

Caused by:

Target signal is a continuous-time signal. Continuous-time signals support faults only if its destinations are discrete.

At the moment, I have triggered a timed fault at 10 sec. How can I fix this issue? Is there another way I can achieve the same goal? Any support is much appreciated.

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Answer 1

MULI 2024-9-13，12:24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2106421-matlab-fault-analysis-continuous-time-signals-support-faults-only-if-its-destinations-are-discret#answer_1516210

Hi Krishna,

I understand that you are getting an issue when you tried to trigger a fault using “Simulink Fault analyser”.

“Simulink Fault analyser” restricts fault injection to discrete-time destinations, leading to errors when interacting with continuous-time components.
To create a fault in your model you can use “Fault” block in simscape.
“Fault” block allows you to represent an electrical fault as an instantaneous change in resistance which replicates both open-circuit and short-circuit fault behaviours.