state space analysis
stability analysis
feedback systems
signal flow graphs
transfer functions
100
State variable analysis has several advantages overall transfer function as
a) It is applicable for linear and non-linear and variant and time-invariant system
b)Analysis of MIMO system
c) It takes initial conditions of the system into account
100
First column elements of the Routh’s tabulation are 3, 5, -3/4, ½, 2. It means that there are:
Are two roots in the right half of the s-plane
100
Benefits of feedback:
Affected by parameter variations
100
A signal flow graph is the graphical representation of the relationships between the variables of set linear algebraic equations.
True
100
Which of the following is not the feature of modern control system?
No oscillation
200
The minimum number of states require to describe the two degree differential equation
2
200
Assertion (A): Feedback control system offer more accurate control over open-loop systems.
Reason (R): The feedback path establishes a link for input and output comparison and subsequent error correction
Both A and R are true and R is correct explanation of A
200
Feedback always increases the gain?
False
200
A node having only outgoing branches.
Input node
200
The output of the feedback control system must be a function of:
Input and feedback signal
300
The transfer function Y(s)/U(s) of a system described by the state equations dx/dt=-2x+2u and y(t) = 0.5x is:
1/(s+2)
300
The Routh-Hurwitz criterion cannot be applied when the characteristic equation of the system contains any coefficients which is :
Negative real, both exponential and sinusoidal function of s
300
Effect of feedback on sensitivity is minimum in:
Closed loop control system
300
Use mason’s gain formula to find the transfer function of the given signal flow graph:
abdeg/1-(bc+ef)+bcef
300
The principle of homogeneity and superposition are applied to:
Linear time variant systems
400
A linear time invariant single input single output system has the state space model given by dx/dt=Fx+Gu, y=Hz, where.
0.5
400
The following characteristic equation results in stable operation of the feedback system s3+4s2+10s+11=0
True
400
Feedback control systems are:
Less sensitive to forward path parameter changes that to feedback path parameter changes
400
Loop which do not possess any common node are said to be ___________ loops
Non touching loops
400
In continuous data systems:
Data is necessarily a continuous function of time at all points in the system
500
A transfer function of control system does not have pole-zero cancellation. Which one of the following statements is true?
System is completely controllable and observable
500
The given characteristic equation s4+s3+2s2+2s+3=0 has:
Two root in the RHS of s-plane
500
Feedback can always reduce the effects of noise and disturbance on system performance?
True
500
Signal flow graphs:
They apply to linear systems
500
. A linear system at rest is subject to an input signal r(t)=1-e-t. The response of the system for t>0 is given by c(t)=1-e-2t. The transfer function of the system is:
2(s+1)/(s+2)