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- Control System Engineering - CSE
- 2018
- PYQ
**Biju Patnaik University of Technology Rourkela Odisha - BPUT**- Electronics and Instrumentation Engineering
- B.Tech
**2149 Views**- 79 Offline Downloads
- Uploaded 1 year ago

Registration No : Total Number of Pages : 02 4th Semester Regular / Back Examination 2017-18 CONTROL SYSTEM ENGINEERING BRANCH : AEIE, EIE, IEE Time: 3 Hours Max Marks : 100 Q.CODE : C773 Answer Part-A which is compulsory and any four from Part-B. The figures in the right hand margin indicate marks. Answer all parts of a question at a place. Q1 a) b) c) d) e) f) g) h) i) j) Q2 a) b) c) d) e) f) g) h) i) j) Part – A (Answer all the questions) Answer the following questions: multiple type or dash fill up type: ______ is an electromagnetic transducer that produces an output voltage depending upon the angular displacement. _____motor rotates in steps. ________block represents the transfer function G(s) of a system. Cascade blocks with transfer functions G1(s) and G2(s) can be replaced by a single block with a transfer function equal to the _____ of transfer functions of individual blocks. To shift the takeoff point to the right of the block G(s), ____________ the takeoff branch by G(s). The closed system has higher ________ than open loop control system; this implies increased speed of response. The necessary condition of stability are ______ of characteristic equation must be real, non-zero and have the same sign. If the roots of the have negative real parts then the response is ____________ Routh Hurwitz criterion gives number of roots in the _________ half of the splane. If the polar plot of a transfer function passes through the critical point (-1,0). Gain margin is _____________ Answer the following questions: Short answer type: Define transfer function of a system. Define impulse and impulse response. What are the different types of stepper motors? Define: settling time and overshoot. What are the standard test signals of a control system? What are the benefits of feedback? What is meant by steady state error? State the necessary conditions for the stability. For a unity feedback control system with G (s) = K/s(s+4), what is the value of K for which the damping ratio is 0.5. State Cauchy’s theorem. B.Tech. PEI4I102 (2 x 10) (2 x 10)

Q3 a) b) Part – B (Answer any four questions) What are the types of Control systems? Write the advantages and disadvantages of all the control systems. Write Mason’s gain formula. (10) (5) Q4 a) b) Explain the procedure to draw the signal flow graph from block diagram. Explain the advantages and disadvantages of block diagram reduction process over signal flow graph. (10) (5) Q5 a) b) What are the time domain specifications? Explain in detail. Sketch a typical step response of a 2nd order under-damped system. (10) (5) Q6 a) Using Routh Hurwitz criterion, determine the stability of a system representing the characteristic equation, s5 +s4+2s 3+3s+5=0 The open loop transfer function of a unity feedback system is given by G(s) = 1/ [s(1+s)2]. Sketch the polar plot and determine the gain and phase margin. (10) A unity feedback control system has an open loop transfer function G(s) = k / [s (s 2 +4s+13)]. Sketch the root locus. What are the advantages of Bode plot? (10) Sketch the Bode plot for the following transfer function and determine the system gain k for the gain cross over frequency to be 5 rad/sec. G(s) = ks 2 / [(1+0.2s)(1+0.02s)] Describe the Nyquist contour and its various segments. (10) Draw the state model of a linear single-input-single-output system and obtain its corresponding equations. State the properties of a state transition matrix. (10) b) Q7 a) b) Q8 a) b) Q9 a) b) (5) (5) (5) (5)

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