Which method can be used to assess loop stability in control systems?

Analyzing the transfer function is a key method used to assess loop stability in control systems. The transfer function provides a mathematical representation of the relationship between the input and output of a system in the frequency domain. By examining the poles of the transfer function, one can determine the stability characteristics of the control loop. Stability is assessed by verifying that all poles are located in the left half of the complex plane, ensuring that the system will return to equilibrium after a disturbance. This analysis helps to evaluate whether the system will exhibit stable behavior (i.e., no oscillations or divergences) in response to perturbations.

In contrast, measuring the system's current may provide insight into the system's operational state, but it does not offer a direct assessment of stability. Calibrating control sensors ensures that the sensors provide accurate readings but does not directly evaluate loop stability. Adjusting feedback parameters can influence the response and performance of the control system, but without analysis of the transfer function, it is difficult to quantitatively assess stability. Therefore, analyzing the transfer function remains crucial for a clear understanding of a control system’s stability.