Unit 1 UNIT 1

9 lecture hours

• Introduction to Digital Control System 1.1 Control System Terminology 1.1.1 Control system (definition
• open loop vs closed loop) Controller (role
• examples: PID, PLC, DCS) Digital Control System (discrete-time signals
• microprocessor/MCU/PLC implementation) Analog Control System (continuous signals
• op- amp/RC implementation) Continuous-time signals (examples: temperature
• voltage waveforms) Discrete-time signals (sampled signals
• digital representation
• aliasing note) 1.1.2 Simple block diagrams analog vs digital controllers.* 1.2 Computer-Controlled Systems 1.2.1 Basic structure: 1.2.2 Example: Liquid level control system 1.3 Computer-Based Control: History and Trends 1.3.1 Early controllers: analog electronics
• pneumatic controllers
• Transition to digital: minicomputers (1960s–70s). 1.3.2 Microprocessor revolution (1980s–90s). 1.3.3 Current trends: PLCs, DCS, Embedded DSPs
• FPGA- Program Name: Diploma Engineering Level: Diploma Branch: Instrumentation & Control Engineering Subject Code: DI04017071 Subject Name: Digital Control System based control
• Industry 4.0. 1.4 Control Theory: History and Trends 1.4.1 Classical era: Root locus
• Nyquist. 1.4.2 Modern control (state-space
• adaptive). 1.4.3 Digital control: sampled-data theory
• stability in z-plane. 1.4.4 Trends: AI/ML in control
• predictive & adaptive digital control. 1.5 Overview of Classical Analog Controller Design 1.5.1 General linear feedback system (unity feedback block diagram). 1.5.2 Feedback system with disturbance input (helps explain rejection properties). 1.5.3 Feedback system without disturbance input (simplified reference model). 1.5.4 Limitations of analog controllers shift to digital control

Unit 2 UNIT 2

10 lecture hours

• Laplace Transform and Z-Transform 2.1 Laplace Transform 2.1.1 Introduction to Laplace Transform Definition and basic concept Region of convergence (ROC) Applications in engineering and control systems 2.1.2 Properties of Laplace Transform 2.2 Z-Transform 2.2.1 Introduction to Z-Transform 2.2.2 Inverse Z-Transform Long division method Partial fraction method Residue method 2.2.3 Properties of Z-Transform Linearity Time shifting Time scaling Time reversal Differentiation in Z-domain Convolution theorem Program Name: Diploma Engineering Level: Diploma Branch: Instrumentation & Control Engineering Subject Code: DI04017071 Subject Name: Digital Control System

Unit 3 UNIT 3.Signal Processing in Digital Control 08 15

• 3.1 Advantages of Digital Control 3.2 Implementation Problems in Digital Control 3.2.1 Sampling effects 3.2.2 Quantization effects 3.3 Basic Digital Control Scheme Configuration 3.3.1 Functional block diagram Explanation of each block 3.4 Signal Conversion Principles 3.4.1 D/A (Digital-to-Analog) converter circuit 3.4.2 A/D (Analog-to-Digital) converter circuit 3.5 Basic Discrete-Time Signals(Properties) 3.5.1 Unit sample sequence 3.5.2 Unit step sequence 3.5.3 Sinusoidal sequence 3.6 Time Domain Models for Discrete-Time Systems** State variable models Difference equation models

Unit 4 UNIT 4

9 lecture hours

• Model of Digital control Devices and Systems 4.1 Basic digital control scheme configuration 4.1.1 Block diagram for basic control system design 4.2 z domain description of sample continuous time plants 4.2.1 Models of A/D converter 4.2.2 Models of D/A converter 4.3 Digital PID controller 4.3.1 Non interacting PID algorithm 4.3.2 Interacting PID algorithm 4.4 Digital Temperature Control System Example 4.5 Stepping motors and their control Explain Stepping motors and their control Example Program Name: Diploma Engineering Level: Diploma Branch: Instrumentation & Control Engineering Subject Code: DI04017071 Subject Name: Digital Control System

Unit 5 UNIT 5

9 lecture hours

• Design of Digital Control Algorithm 5.1 Digital Design Procedures 5.1.1 Direct synthesis procedure 5.1.2 Iterative design procedure 5.2 z plane specifications of control system design Stability Steady state accuracy Transient accuracy Disturbance rejection Insensitivity and robustness 5.3 Root locus in z plane Mapping of s plane patterns on the z-plane 5.4 Digital compensator design using frequency response plots 5.4.1 Lead Compensator 5.4.2 Lag compensator 5.4.3 Lead –Lag compensator Example : 1 /s(s+5)