control systems questions in gate

Z-transform Analysis of Sampled-Data Control Systems 1. The DFT of a signal x(n) of length N is X(k). When X(k)

The inverse z-transform & Response of Linear Discrete Systems 1. Unit step response of the system described by the equation

The Z-Transfer Function 1. Consider the following statements regarding a linear discrete-time system: H (z) = z2+1/(z+0.5)(z-0.5) 1. The system

The Z-Transform 1. The discrete-time signal x (n) = (-1)n is periodic with fundamental period a) 6 b) 4 c) 2

Difference Equations 1. Difference equation model results in: a) Sampled-data systems b) Numerical analysis of continuous time systems c) Continuous

Signal Reconstruction 1. Sampling can be done by: a) Impulse train sampling b) Natural sampling c) Flat-top sampling d) All

Spectrum Analysis of Sampling Process 1. Statement (I): Aliasing occurs when the sampling frequency is less than twice the maximum

Feedback Compensation 1. Which of the following are the not characteristics of the closed loop systems? a) It does not

Tuning of PID Controllers 1. The input of a controller is a) Sensed signal b) Error signal c) Desired variable

Cascade Compensation in Frequency Domain 1. A phase lead compensation leads to: a) Increase in overshoot b) Reduction in bandwidth