MCQ Subject: Control Systems

According to the Routh-Hurwitz criterion, what does it imply if all elements in the first column of the Routh array are positive?

Which stability criterion in control systems determines stability by analyzing the number of enclosures around the critical points (-1,0) in the Nyquist plot?

In control systems, a Bode plot analysis reveals a phase margin of 0 degrees at the gain crossover frequency. What does this indicate about the system’s stability?

Which of the following stability analysis methods involves constructing a Routh array from the characteristic equation coefficients to determine the number of poles in the right-half plane?

Which stability criterion is used to determine the stability of a system without plotting the root locus?

When a row of zeros is encountered in constructing the Routh-Hurwitz array for a system, the appropriate step is:

A closed-loop system has a Nyquist plot that encircles the point (-1,0) twice in the counter-clockwise direction. What does this indicate about the system’s stability?

What is a primary advantage of using state feedback in control systems?

In a root locus plot of a control system, which of the following is TRUE regarding the branches?

Which method is primarily used to analyze the stability of a control system by plotting the roots of the characteristic equation as a function of a variable parameter?