Download PTU B.Tech 2020 March EE 6th Sem Non Linear And Digital Control Systems Question Paper

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Roll No. | Total No. of Pages : 02

Total No. of Questions : 09

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B.Tech.(EE/Electrical & Electronics Engg.) (2012 Onwards)

B.Tech. (Electronics & Electrical Engg.)

(2012 to 2017) (Sem.-6)

NON-LINEAR AND DIGITAL CONTROL SYSTEMS

Subject Code : BTEE-603

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M.Code : 71149

Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.

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3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

1. Answer briefly :
   1. What is the significance of singular points?
   2. Why is transfer function of any system important?
   3. What is the significance of dead zone?

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   4. What do you understand from stability of the system?
   5. What is the difference between Laplace transform and Z transform?
   6. Is there any loss in observability due to sampling?
   7. What is state variable model?
   8. What is the use of variable gradient method?

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   9. Differentiate Coulomb friction and backlash.
   10. Where can the Jury test of stability applied?

SECTION-B

1. Produce a state model for the following differential equation : Y'''+6Y''+10y'+5y = u'+5u

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2. What is the structure of state feedback control system? What is the effect of state feedback on controllability and observability? What system is neither observable nor controllable?
3. Explain the Jury test of stability. How it helps to find stability of a given system? Explain with a suitable example.
4. How is the reconstruction of a sampled signal done? Differentiate zero order and first order hold.
5. What is the use of Lyapunov functions to estimate transients? Comment upon the stability of linear and non-linear systems.

SECTION-C

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1. What is the role of Laplace transform and Z transform in the sampling process? How is the state variable formulation of a discrete time system carried out? Explain with a suitable example.
2. What do you understand from describing functions? What analysis do they provide about the system stability? What is the significance of saturation and dead zone?
3. Explain in detail the phase portrait of a second order non-linear system? What is the need of phase plane analysis?

NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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