Question

1 T I т I N F The transfer function of a linear differential equation is defined by the Laplace transform of output (response function) over the Laplace transform of input (driving force) The block diagram of a system is not unique. F In the system with the first order differential equation, the steady-state error due to unite step function is not zero. F In a system with a sinusoidal input, the response at the steady state is sinusoidal at the different frequency as input but it is identical in amplitude and phase angle 3 T 4 T with input. 5 T 6 T To reduce the transmitted force, increasing damping ratio is not always the effective way and it depends on frequency ratio. F We cannot eliminate the transmitted force even If the mass and stiffness of absorber is designed so that the natural frequency of absorber is equal to and input frequency F The closed loop transfer function with positive feedback can be obtained by G(S)/[1 + G(s)H(s)] if H(s) is the feedback element. F The inherent steady-state error which is present in the first order system using proportional controllers can be removed by using PI (proportional-Integral) controllers. 7 т 8 T

Answer 1

1) True

The transfer function tells the block diagram of loop.

2) true

There may exist more than one block diagram.

3) True

4) False

5) true

Transmissivity of a system depends upon frequency also.

6) true

Particular Integeral never be eliminated.

7) true