Digital Control System (ELEDSE8F) — DU B. Sc. (Hons) Electronics Previous Year Question Papers

B.Sc.¢D Electronics (Core) Digital Control System Instruction for Candidates 3. Sub-parts can be given (a) (b) (c) What is meant by stability in digital control systems? What is a zero order.Hold (ZOH)? State Jury's stability criteria to check the stability of any digital control system. (d) State the angle and magnitude conditions of Root Loci method for discrete-time control system. (e) Define state, state variable and state vectormodel in Discrete time control systems. (I) Explain the princijle of Deadbeat control design. (a) Define sampling theorem. State the condition to avoid aliasing. (b) Derive the pulse transfer function using zero order Hold. (c) What is the difference between continuous-time-and discrete-time 6 (a) Check the stability of the control system having the following characteristic equation using Jury Stability Test: (b) (c) Explain how the stability of any digital control system is checked using bi-linear transformation method. State and explain the various transient response specifications of a 6 digital control system. 4 (a) Derive the general solution of the linear time-invariant disc.,rete-time state-space equation. (b) (c) Explain the concept and fundamental properties of the State Transition Matrix (STM) in discrete-time systems. Find State Transition Matrix of the following state space equation and output equation. (a) Explain the design procedure in w plane (bi-linear transformation) for the following digital control system: q)) (c) (a) (b) (c) Explain the design steps of a Digital Lead compensator. How important are digital PID controllers for digital control sys,terns? Write the relation between the s-,plane and z-plane. What are the advantages of Bode diagrams to analyse and design control systems? Draw the root locus diagram for the following system for a sampling period of 1 second (a) Explain four canonical forms mostly used in state space representation of Discrete time control system. (b) Discuss the design of a state feedback controller'through the pole placement teclmique and how this method ensures desii.ed closed-loop system stability and performance.