61
In a stable control system saturation can cause which of the following ?
Ans:
Answer: High-level oscillations
Questions
62
The phase lag produced by transportation relays
Answer: increases linearly with frequency
63
In order to increase the damping of a badly underdamped system which of following compensators may be used ?
Answer: Phase-lead
65
Addition of zeros in transfer function causes which of the following ?
Answer: Lag-compensation
66
Phase margin of a system is used to specify which of the following ?
Answer: Relative stability
67
Which of the following is the best method for determining the stability and transient response ?
Answer: Root locus
68
If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is
Answer: not necessarily stable
70
Velocity error constant of a system is measured when the input to the system is unit _______ function.
Answer: ramp
71
The position and velocity errors of a type-2 system are
Answer: zero, constant
75
A conditionally stable system exhibits poor stability at
Answer: reduced values of open loop gain
76
Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal.
Answer: all of the above
77
An increase in gain, in most systems, leads to
Answer: smaller damping ratio
78
The frequency and time domain are related through which of the following?
Answer: Laplace Transform and Fourier Integral
79
Spring constant in force-voltage analogy is analogous to
Answer: reciprocal of capacitance
80
Hydraulic torque transmission system is analog of
Answer: resistance-capacitance parallel circuit
