Control Systems Objective Questions & Answers – Set 5

A second order control system has a transfer function 16/(s² + 4s + 16). Find the settling time for 2% tolerance?

A proportional plus integral controller

The optimum values of damping ration is ------------

Which of the following controller is also known as anticipatory controller?

The unit step response of the system is 1 - e^-t(1+t). Which is the system?

The device necessarily used for automatic temperature control in a furnace is

For the polynomial P(s) = s⁴ + 8s³ + 18s² + 16s +5, find the number of roots which lie on the right half of s-plane?

When the input to a system was with drawn at t=0, its output was found to decrease exponentially from 1000 units to 500 units in 1.386 sec. The time constant of the system is

Settling time for 5% tolerance band is -------------

The system is initially critical damped. If the gain of the system is doubled, then it will exhibit

Transient state analysis depends on which of the following?

For the polynomial P(s) = 2s⁵ + s⁴ + 4s³ + 2s² + 3s + 15, number of roots which lie in the right half of s-plane is

The open loop transfer function of a unity feedback control system is given by G(s) = k/s(s+1). If the gain k is increased to infinity, then damping ratio will tend to become

A first order system is initially at and subjected to a sudden input at t=0. Its output reaches 1.1 V in 4 sec and eventually reaches steady state of 2 V. Find the time constant?

The transfer function of a system is G(s) = 100/((s+1)(s+100)). For unit step input to the system the approximate settling time for 2% criterion is

Which one of the following is the steady state error for a step input applied to a unity feedback system with the open loop transfer function G(s) = 10/(s²+14s+50)?

The Laplace transformation of f(t) is F(S) given F(s) = ω/S² + ω² the final value of f(t) is

Find the stability for the following transfer function? G(s) = 50/s(s+5)

Two identical first order systems have been cascaded non interactively. The unit step response of the systems will be

Which of the following controller has sluggish response?

Time constant is defined as the time taken by the response of the system to reach ----------- ?

A ramp input applied to an unity feedback system results in 5% steady state error. The type number of the system is...........?

In which of the following controller band width is increased?

Which one of the following is the response y(t) of a casual LTI system described by H(s) = (s+1)/(s²+2s+2) for a given input x(t) = e^-t u(t)?

A second order control system has a transfer function 16/(s² + 4s + 16). What is the time for the first overshoot?

The system having characteristic equation s⁴ + 2s³ + 3s² + 2s + k = 0 is used to be an oscillator. What is the value of k?

The transfer of a system is 10/(1 + S) when operated as a unity feedback system, the steady state error to a unit step input will be

The impulse response of an initially relaxed linear system is e^-2tu(t). To produce a response of te^-2tu(t), the input must be equal to

Transient response is improved in case of

A proportional plus derivative controller