why iam getting negative settling time for load frequency of two area system by using pid controller

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deekshith
deekshith 2024-3-17
回答： Yash 2024-3-25
for both the areas response iam getting negative settling time
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Sam Chak
Sam Chak 2024-3-18
Hi @deekshith,
Unfortunately, I am unable to check the Simulink model as there is no mathematical model, such as a transfer function, available to establish the mapping between the system's input and output. However, the key to understanding the steady-state response lies in the design of the controllers.

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Yash
Yash 2024-3-25
Hi Deekshith!
Based on the output response graph you've shared, it appears that the waveforms exhibit a positive settling time. The primary concern, however, seems to be the negative peak overshoot or the negative steady-state response you are encountering.
Since you have not shared any mathematical model depicting the simulink model, it is very not possible for us to determine the exact reason causing this issue. The problem could arise from various factors, such as a missing negative sign in a gain block or incorrect equations in one or more transfer functions.
To troubleshoot this issue, consider the following steps:
  • Examine all the gain blocks to ensure they are configured correctly.
  • Review the equations in all transfer functions for accuracy.
  • Divide the complete model into smaller submodels and analyze the steady-state response of each to isolate the problem (this approach is akin to unit testing).
  • Check for nonlinearity in the system. Nonlinear characteristics of the system components can lead to complex responses, including negative overshoot.
These steps should help you identify and rectify the issue, leading to improved model performance.

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