A control system whose step response is -0.5(1+e-2t) is cascaded to another control block whose impulse response is e-t. What is the transfer function of the cascaded combination?
A. 1/(s+2)(s+1)
B. 1/(s+1)s
C. 1/(s+3)
D. 0.5/(s+1)(s+2)
Answer:A
A control system whose step response is -0.5(1+e-2t) is cascaded to another control block whose impulse response is e-t. What is the transfer function of the cascaded combination?
A. 1/(s+2)(s+1) B. 1/(s+1)s C. 1/(s+3) D. 0.5/(s+1)(s+2)
Explanation: Laplace transform is the transformation that transforms the time domain into frequency domain and of both the cascaded systems are 1/(s+1)(s+2).