‎00१४‏ 100008040912 ہو
‎APJ ABDUL KALAM 18 1 UNIVERSITY‏
‎Seventh Semester B.Tech Degree Regular and Supplementary Examination December 2021 (2015 Scheme)‏

‎Course Code: EC409
Course Name: CONTROL SYSTEMS
Max. Marks: 100 Duration: 3 Hours
(Graph sheet and semi- log sheets will be provided)

‎PARTA

‎Answer any two full questions, each carries 15 marks

‎1. a) Determine the transfer function of the system X2(s)/F(s) (6)

‎b) Draw the signal flow graph for the following set of algebraic equations (9)
ಸರ ಖಡ , X3=bxy+CXy „4-021-63 ത്ഥം , ധം. Hence find the
overall transfer function using Masons gain formula

‎2. ൭) Open loop transfer function of a unity feedback system is

‎10
‎G (s) = ———.. Determine the steady state error and error constants for
5 (5+5) (5+10)
the input r(t}= 5 + 101 + 6 (8)

‎0) Derive an expression for time response of a critically damped second order system

‎to impulse input (7)

‎3. a)Reduce the block diagram using block reduction technique and find C(s)/R(s)
(8)