Feedback control systems are:a)Insensitive to both forward and feedbac...
Explanation: Feedback control system can be positive and negative but positive feedback systems less widely used as the positive feedback systems are more sensitive to parameter variations but negative feedback are less sensitive to change in G than change in H.
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Feedback control systems are:a)Insensitive to both forward and feedbac...
Feedback Control Systems: Sensitivity to Parameter Changes
Feedback control systems are used to control the output of a system by measuring the output and comparing it to a desired value. The error signal is then fed back to the input of the system to adjust it and minimize the error. In this process, there are two paths: the forward path and the feedback path.
Sensitivity to Parameter Changes
The sensitivity of a control system is defined as the degree to which the system output changes in response to a change in the system parameters. In other words, how much the system output changes in response to a change in the input or feedback path parameters.
For feedback control systems, there are two types of sensitivity to parameter changes: sensitivity to forward path parameter changes and sensitivity to feedback path parameter changes.
- Sensitivity to Forward Path Parameter Changes: The forward path is the path from the input to the output of the system. A change in the forward path parameters, such as the gain or transfer function of the system, can affect the system output. Feedback control systems are less sensitive to changes in the forward path parameters than to changes in the feedback path parameters. This is because the feedback loop provides a corrective signal that compensates for the changes in the forward path.
- Sensitivity to Feedback Path Parameter Changes: The feedback path is the path from the output to the input of the system. A change in the feedback path parameters, such as the gain or transfer function of the feedback loop, can affect the system output. Feedback control systems are more sensitive to changes in the feedback path parameters than to changes in the forward path parameters. This is because the feedback loop is responsible for the correction of the error signal.
Conclusion
In conclusion, feedback control systems are less sensitive to changes in the forward path parameters than to changes in the feedback path parameters. This is because the feedback loop provides a corrective signal that compensates for the changes in the forward path. Therefore, it is important to consider the sensitivity of a control system to parameter changes when designing and implementing feedback control systems.
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