Q. Routh-Hartwiz criterion suggests the way to improve the system stability.
Q. Nyquist criteria gives direct value of corner frequency.
Q. The root locus terminates at the poles of the characteristic equation.
Q. In an unstable system, it is possible to achieve initial equilibrium state.
Q. When transient response is satisfactory and steady state characteristics are not satisfactory, normally lag compensation is employed.
Q. Phase lag network is employed for increasing system stability as well as bandwidth.
Q. Phase lag network is used to increase system stability and maintain velocity gain constant.
Q. The friction coefficient in a system is a kept low to increase velocity lag error.
Q. A servo with better frequency response need not be stable.
Q. Some servos do not need to be stable, since they are intended for use with steady signals.
Q. A tachogenerator is a speed sensor.
Q. Integral control action reduces steady state error.
Q. A phase lead controller affects the steady-state error.
