PART-1

1. PART-1 CONTROL SYSTEM COMPONENTS

2. DC MOTOR CONTROL

3. ARMATURE-CONTROLLED DC MOTOR

4. CONT’

5. POTENTIOMETER

6. POTENTIOMETER AS A FEEDBACK SENSOR

7. INVERTING AND NON-INVERTING AMPLIFIERS

8. DIFFERENTIAL AND SUMMING AMPLIFIERS

9. INTEGRATOR AND DIFFERENTIATOR

10. TACHO GENERATOR

11. TACHOGENARATOR PROVIDES THE FEEDBACK SIGNAL FOR SPEED CONTROL SYSTEMS

12. TACHOMETER AS A FEEDBACK SENSOR

13. TACHOMETER AND POTENTIOMETER AS A FEEDBACK SENSOR

14. CHAPTER-3PART-1 BLOCK DIAGRAM REDUCTION

15. DEFINITION OF BASIC ELEMENTS OF BLOCK DIAGRAM1. BLOCK DIAGRAM: The shorthand pictorial representation of the cause-and-effect relationship between the input andoutput of a physical system.

16. 2. OUTPUT:The value of input multiplied by the block gainC(s) = G(s)R(s)3. SUMMING POINT: A point at which two or more signals can be added or subtracted.

17. 4. TAKE - OFF POINT: The point at which the output signal of any block can be applied to two or more points.

18. 5. FORWARED PATH: The direction of flow of signal from input to output.6. FEEDBACK PATH: The direction of flow signal from output to input .

19. RULES FOR BLOCK DIAGRAM REDUCTION RULE-1: ASSOCIATIVE LAW

20. RULE-2: FOR BLOCKS INCASCADE(SERIES)

21. RULE 3: FOR BLOCKS IN PARALLEL

22. RULE 4: ELIMINATING FEEDBACK LOOP

23. RULE 5: SHIFFTING A SUMMING POINT BEFORE A BLOCK

24. RULE 6: SHIFTING OF SUMMING POINT AFTER A BLOCK

25. RULE 7: SHIFTIN OF TAKE-OFF POINT BEFORE A BLOCK

26. RULE 8: SHIFTING OF TAKE-OFF POINT AFTER A BLOCK

27. RULE 9: SHIFTING OF TAKE-OFF POINT BEFORE SUMMING BLOCK

28. RULE 10: SHIFTING OF TAKE-OFF POINT AFTER SUMMING BLOCK

29. Exp1: Find the transfer function Y(s)/R(s)

30. _ + + + + _ Exp 2: find C/R

31. + + + _ Soln _ +

32. + + + _ Cont’ _ +

33. + _ Cont’ _ + + +

34. + _ Cont’ _ + + +

35. + _ Cont’ _ +

36. + _ Cont’ _ +

37. + _ Cont’

38. Cont’

39. Exp 3: Find the transfer function Y(s)/R(s)

40. Soln

41. DISASSEMBLING ACTIONS

42. Exp 4: Find the o/p of the system shown in the fig. below

43. CHAPTER-3PART-2 SIGNAL FLOW DIAGRAM (SFG)

44. SFGSFG:pictorial representation of a system which displays graphically the transmissionof signals-Simplified version of a block diagram-In SFG all variables are represented by the nods, and the lines joining the nods are called branches. y2 = a12y1

45. BASIC DEFINITIONS IN SFG

46. FROM THE ABOVE FIGURE INPUT/SOURCE NODE: The node having only outgoing branches is called input or source node. y1is the input or source node. SINK NODE: The node having only incoming branches. Y7is the sink or output node. CHAIN NODE: The node having both incoming and outgoing branches. Y2 , y3 , y4 , y5 and y6are all chain nodes.

47. FORWARD PATH: A path from input to output. Y1 – Y2 – Y3 – Y4 – Y5 – Y6 – Y7 : First forward pathY1 – Y2 – Y3 – Y6 – Y7 : Second forward pathAny node should not be traded twice. FEEDBACK LOOP/FEEDBACK PATH: A loop that originates and terminates at the same node. • Y2- y3 – y2 : First feedback loop • Y2 –y3 – y4 – y5 – y2 : Second feedback loop • Y4 – y5 –y4 : third feedback loop

48. SELF LOOP: A loop that consists of only one node. In determining forward path or feedback path, the self-loop should not be taken into account. -H4, at y6, is the self loop. PATH GAIN: The product of gains going through a forward path . The path gain for the first forward path is P1 = 1*G1*G2*G3*G4*1 and The path gain for the second path is P2 = 1*G1*G5*1

49. LOOP GAIN: The product of all gains of the branches forming a loop.The loop gain for the first feedback loop isL1 = -G1*H1The loop gain for the second feedback loop is L2 = -G1*G2*G3*H3 The loop gain for the third feedback loop is L3 = -G3*H2 L4 = -H4 (self-loop)

50. NON-TOUCHING LOOPS: If there is no node common between two or more loops. L1 and L3 are non-touching loops. But L2 is touching to L1 and L3 If no node is common between a forward path and a feedback loop, this loop is non-touching to the forward path. L3 is non-touching to P2