BEE BEE Bachelor of Electrical Engineering Control System Principles Questions and Answers 2

Question 1

What is the primary purpose of a lead compensator in a control system?

Accepted Answer

To improve transient response by adding phase lead

Answer

To eliminate steady-state error entirely

Answer

To reduce the system bandwidth

Answer

To convert an open-loop system to closed-loop

Question 2

In a Bode plot, what does a slope of -40 dB/decade indicate about the system's transfer function?

Accepted Answer

Two poles at that frequency range

Answer

A single pole and a single zero

Answer

A single integrator

Answer

A derivative term

Question 3

Which criterion determines the absolute stability of a linear time-invariant system by examining the characteristic equation coefficients?

Accepted Answer

Routh-Hurwitz criterion

Answer

Nyquist criterion

Answer

Bode stability criterion

Answer

Gain margin criterion

Question 4

What does a phase margin of 0 degrees indicate about a feedback control system?

Accepted Answer

The system is on the verge of instability

Answer

The system is overdamped

Answer

The system has infinite gain margin

Answer

The system has zero steady-state error

Question 5

In state-space representation, what does the controllability matrix being full rank guarantee?

Accepted Answer

The system state can be driven to any desired state using the input

Answer

The system output can be measured from all states

Answer

The system is asymptotically stable

Answer

The system has no transmission zeros

Question 6

What effect does adding a pole at the origin to an open-loop transfer function have on system type?

Accepted Answer

It increases the system type by one

Answer

It decreases the system type by one

Answer

It has no effect on system type

Answer

It makes the system type zero