AERO_LCS_PPT-INTRODUCTION FOR AERO SPACE ENGINNERING.pdf
- 1. 02-07-2024 Mr.R.A.NAIK, ASSOC.PROF, DEPT OF EEE 1 LINEAR CONTROL SYSTEM (20EE81) By R.ANJANEYULU NAIK ASSOC.PROF DEPT OF EEE,LBRCE,
- 2. 02-07-2024 Mr.R.A.NAIK, ASSOC.PROF, DEPT OF EEE 2 July 14 marks the one-year anniversary
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- 4. Whether LCS is a part of AEROSPACE OR NOT? LINEAR CONTROL SYSTEM (LCS) 4
- 5. 5 Steam flow TURBINES Steam Temp, Steam Flow Velocity,
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- 7. PITOT TUBE is device to measure aircraft speed. 7
- 9. 9 Automatic Flight Control System
- 10. 10 several sensors for various tasks like speed control, height monitoring, position tracking, status of doors, obstacle detection, fuel level etc…
- 11. 11 Before Controlling, Measure the parameters….SENSOR
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- 14. 14 Control Examples • At home • Washing machines • Microwave cookers • Video recorders • Remote control television • Central heating systems • Alarm system
- 15. 15 Control Examples • Outside the home • Traffic light systems • Car park barriers • Remote controlled car
- 16. 16 Control Examples • At work • Air conditioning systems • Lifts • Automatic doors • Factory robots
- 20. POWER PLANTS WATER LEVEL TEMPERATURE FUEL FLOW STEAM FLOW TURBINE SPEEED STEAM PRESSURE 20
- 21. IMPORTANCE OF CS Control engineering is not limited to any engineering discipline but is equally applicable to: aeronautical, chemical, mechanical, computer science and engineering , civil engineering, electrical,electronics engineering etc….. Control Systems 21
- 22. What are the contents and teaching of the course? CEOs What are the abilities after completion of the course? COs 22
- 23. UNIT Course Content 1 MM: INTRODUCTION: MATHEMATICAL MODELLING OF CONTROL SYSTEMS 2 TRA-1:Time Response analysis TRA-I 3 TRA-2:Time Response analysis TRA -II 4 FRA:FREQUENCY RESPONSE ANALYSIS FRA 5 SSA: STATE SPACE ANALYSIS SSA OF CONTINUOUS SYSTEMS 23
- 24. BOOKS: B. C. Kuo 24
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- 28. UNIT-1 INTRODUCTION: MATHEMATICAL MODELLING OF CONTROL SYSTEMS 28
- 29. IMP TOPICS 1. Open Loop system and closed loop system, their examples.-3Q 2. MATHEMATICAL MODELLING MM : LINEAR AND ROTATIONAL-2Q 1. BLOCK DIAGRAM REDUCTION BDR METHOD -2Q 2. SIGNAL FLOW GRAPH SFG TECHNIQUE - 2Q 29
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- 33. What is Linear? Output follows the input. 33
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- 36. What is Control System? 36
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- 39. What is Control System? • System – An interconnection / arrangement of elements/ devices in sequence manner. • Control :To regulate, To direct, To command…It is a desired quantity… Control Systems 39 Control System: Arrangement of elements in a sequence manner to get desired value by Regulating or command or direct.
- 40. 40 Traffic Control System: Arrangement of LEDs in a sequence manner to control the traffic by giving commands.
- 42. Types of Control Systems: 1.Openloop Control Systems OLCS 2.Closed Loop Control Systems CLCS a.Manual Control b.Automatic Control 42
- 43. When the amplifier circuit uses the Feedback ( as a sensor signal), then it is called feedback amplifier. 43
- 44. Can we control any desire level? Any person is controlling? SYSTEM 44
- 45. If a System control any desire level or reach the target, its comes under CLCS. 45
- 46. When the amplifier circuit uses the Feedback ( as a sensor signal), then it is called feedback amplifier. OPEN LOOP AND CLOSED LOOP 46
- 47. MAIN BUILDINGS BLOCKS OF CLOSED LOOP SYSTEM 47
- 48. MAIN BUILDINGS BLOCKS OF OPEN LOOP SYSTEM 48
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- 50. Hair Dryer & Hand dryer Open loop or Closed loop? 50
- 51. Target/Set Point: To dry the Hair. Time based or not. Time based mean OLCS.. If Hair will be dry, automatically off…it is CLCS 51
- 52. Time based or not. Time based mean OLCS. CLCS:Suited to target and not time based. 52
- 53. Traffic Signal & Traffic Police Open loop or Closed loop? 53
- 54. SYSTEM2 50CM 54
- 55. Chalk Board Target: To erase the Board with Hand Can you identify the name of the Process, SP, SENSOR,CONTROLLER, ACTUATOR SYSTEM4 55
- 56. Chalk Board Target: To erase the Board with Duster Can you identify the name of the Process, SP, SENSOR,CONTROLLER, ACTUATOR 56
- 57. Coffee Machine: Open Loop or Closed Loop? 150 ml 250 ml SYSTEM7 57
- 58. CAP S 58
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- 60. (a) Block diagram or Elements of Open-Loop Control System 60
- 61. Controller: A device is used to control the process and sent signals to a final control element (control valve or an electric motor) .Here there is no control action, because of absence of Feedback element Actuator / Final Control Element (FCE) : A device that receives signal from the controller to directly influence the Process mean which is physically influence the process and here their no influence on the process. Process: The specific quantity that can be measure. Examples: pressure, level, temperature, flow, pH, position, speed, vibration. Elements of Open Loop Control system 61
- 62. (a) Feedback Control System and (b) Open-Loop Control System (a) (b) 62
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- 64. Transfer function of Closed Loop Control System (negative Feedback) 64 negative Feedback Positive Feedback
- 65. Open-Loop Control System and All predefined Timer devices 65
- 66. Example for Open-Loop Control System and Traffic Signals 66
- 67. Open-loop control systems Examples Washing machine Traffic signals 67
- 68. Open-loop control systems Advantage: 1.Simple construction and ease of maintenance. 2.Less expensive than a closed-loop system. 3.No stability problem. Dis-adv: 1.Recalibration is necessary from time to time. 2.Sensitive to disturbances, 3.Less accurate. 68
- 69. Closed loop Control System • Manual control • Automatic control (involving machines only). 69
- 70. Sensor Actuator Process Controller + Set-point or Referenc e input Actual Outpu t Error Controlle d Signal Feedback Signal + - Elements or Basic Building Of Control System Manipulate d Variable Summing point 70
- 71. Controller: A device that receives a process variable (PV) signal from sensor, then compares that signal to the desired value (SP), and calculates an appropriate signal value depending upon Controller modes and sent to a final control element such as control valve or an electric motor . Final Control Element (FCE)/Actuator: A device that receives signal from the controller to directly influence the Process mean which is physically influence the process. Examples: control valve, electric heater etc.. Process: The specific quantity that can be measure. Examples: pressure, level, temperature, flow, pH, position, speed, vibration. Elements of Closed Loop Control system 71
- 72. Sensor: It sense the physical quantity and Convert into electrical signal with help of transmitter. Example: Level into electrical signal Temperature into electrical signal 72
- 73. OPEN LOOP Vs CLOSED LOOP 73
- 74. SET POINT 74
- 75. Identify controller, actuator, process and sensor? 75
- 76. Main advantages of feedback system/CLCS: ❖Reduce disturbance effects ❖Stabilize an unstable system ❖Create well-defined relationship between output and set point 76
- 77. Compare b/n OLCS and CLCS Can you identify adv and dis-adv of OLCS and CLCS? 77
- 78. Traffic Signal Vs Traffic Police 78
- 79. Control Systems 79 COMPUTER CONTROL OR AUTOMATIC CONTROL
- 81. Mathematical Modeling Types of Physical Systems 1.Translational or Linear Mechanical System 2. Rotational Mechanical System 81
- 82. Mechanical Systems Translational • Mass • Spring • Damper/dashpot Rotational • Inertia • Damper • Spring 82
- 83. Basic Types of Mechanical Systems • Translational • Linear Motion • Rotational • Rotational Motion 83
- 84. Building Linear Mechanical Blocks • Mathematical model of a machine mounted on the ground Mass Ground Input, force Output, displacement 84 SPRING CONSTANT K Damper CONSTANT C
- 85. Building Rotational Mechanical Blocks • Mathematical model of a rotating a mass Torque Moment of inertia Torsional resistance Shaft Physical situation Block model 85
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- 87. Translational or Linear Mechanical System Basic Elements of Physical System: 1.Spring 2.Mass 3.Damper 87
- 88. Why damping is required? 88
- 89. Q.Obtain Transfer function for given Physical System 89
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- 91. relation between displacement velocity and acceleration 91
- 92. 92 Building Linear Mechanical Blocks
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- 94. STEPS TO OBTAIN TF by using Mathematical Modeling Differential Equation Method: STEP1: Draw FBD. STEP2: Write Differential Equation STEP3: Apply the Laplace Transform STEP4: Simplify and get relation output/input X(s)/F(s). 94
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