Thiagarajar College of Engineering, Madurai 625 015.

Preamble

Discrete-Time Signal processing is concerned with the representation, transformation, and manipulation of signals and the information they contain. It is an area of science and engineering that has developed rapidly over the past few decades. The novel algorithms by Cooley and Tukey (1965) for efficient computation of Fourier transform provided a new point of view towards discrete-time signal processing. This course aims at the analysis and design of signal processing systems and computational techniques.

Prerequisites: Signals & Systems

Course Objectives

Signal Processing has developed rapidly over the past few decades and has numerous applications in the field of Audio and Speech Processing, Radar, Sonar, Robotics, Big data, Biomedical, and many more. In this course, we begin with the review of Signals and Systems including the summary of analysis and synthesis equation for Fourier Transforms tools and z-transform. An in-depth computation of DFT and FFT algorithms in spectral analysis and filtering applications is presented. This course develops different methods of filter design in both IIR and FIR and the corresponding structures. The effect of quantization is analyzed in digital filters using finite precision arithmetic. This includes the effects on the filter frequency response characteristics resulting from quantization and round-off noise effects inherent in the digital implementation of discrete-time systems.

Discrete - Time Signal Processing : Syllabus

Module - I Review of signals and systems: Concept of frequency in discrete-time signals, a summary of analysis & synthesis equations for FT & DTFT, frequency domain sampling and z-transform
Module - II Discrete Fourier Transform (DFT): Deriving DFT from DTFT, properties of DFT - periodicity, symmetry, circular convolution. Linear filtering using DFT. Filtering long data sequences - overlap save and overlap-add method. Fast computation of DFT - Radix-2 Decimation-in-time (DIT) Fast Fourier transform (FFT), Decimation-in-frequency (DIF) Fast Fourier transform (FFT). Linear filtering using FFT
Module - III Finite Impulse Response Filters: Design of FIR filters - symmetric and Anti-symmetric FIR filters - design of linear phase FIR filters using Fourier series method - FIR filter design using windows (Rectangular, Hamming and Hanning window), Frequency sampling method. FIR filter structures - linear phase structure, direct form realizations
Module -IV Infinite Impulse Response: Characteristics of practical frequency-selective filters. characteristics of commonly used analog filters - Butterworth filters, Chebyshev filters. Design of IIR filters from analog filters (LPF, HPF, BPF, BRF) - Approximation of derivatives, Impulse invariance method, Bilinear transformation. Frequency transformation in the analog domain. Structure of IIR filter - direct form I, direct form II, Cascade, parallel realizations.
Module - V Finite World Length Effects: Fixed point and floating-point number representation - ADC - quantization - truncation and rounding - quantization noise - input/output quantization - coefficient quantization error - product quantization error - overflow error - limit cycle oscillations due to product quantization and summation - scaling to prevent overflow

Textbooks:

1.Alan V.Oppenheim, Ronald W. Schafer, “Discrete-time signal processing”, Prentice-Hall, Third Edition, 2009. 2.John G.Proakis and Dimitris G.Manolakis, “Digital Signal Processing Principles, Algorithms, and Applications”, Prentice-Hall of India, Fourth Edition, 2006.
3.Sophocles J.Orfanidis “Introduction to Signal Processing”, Prentice-Hall, 1996.
4.Sanjit K.Mitra “Digital Signal Processing: A computer-based approach” McGraw Hill Education; 4 edition – 2013

Today's fierce industry competition necessitates high-quality, consistent products at a reasonable price. To meet this problem, a variety of businesses are experimenting with novel product designs and integrated manufacturing procedures, as well as automated devices. Industrial automation is one of the most notable and impactful steps toward solving complicated real time problem. By using new, creative, and integrated technologies and services, industrial automation makes it possible to improve product quality, reliability, and production rate while lowering manufacturing and design costs. The course covers both theoretical and practical aspect of industrial automation through Fluid power and PLC for solving real time applications problems.

Course Duration: 4 Weeks

Course Outcomes:

By the end of this course, the learners will be able to

• Explain the construction, working and control strategies of different industrial drives and valves.
• Design pneumatic and Electro pneumatic circuits for solving real time problems.
• Design Hydraulic and proportional hydraulic circuits for Industry 4.0 applications.
• Develop PLC program for low level industrial applications.

Course Contents:

Module-1- Fluid Power Automation- Introduction Introduction- Classification of Fluid Power automation (FPA) - Significance of FPA- Gas Law- Direction flow and pressure control valves- Directional control valve - 3/2-way valve - 4/2-way valve - 5/2-way valve - Shuttle valve - check valve - Pressure control valve - Simple and compound relief valve, pressure reducing valve, sequence valve, counter balance valve. Flow control valve.

Module-2- Pneumatic & Hydraulic Circuits Design requirements-Speed control circuits, Direct Flow control circuits- OR, AND Function - Pneumatic hydraulic circuit, Fail safe circuit, Sequential circuit and cascade circuit design for real time industry applications - Simulation demonstration of sequential and cascade circuit.
Module-3- Electro Pneumatic and Proportional Hydraulic circuits Introduction to relay and solenoid - Electro Pneumatic control - Solenoid actuated valves - Circuit diagram - Sequential circuit and cascade circuit design - Proportional Hydraulic circuit operation- Simulation demonstration of electro sequential and cascade circuit.

Module-4- Introduction to PLC PLC architecture - I/O Section -Discrete I/O Modules - Analog I/O Modules-Special I/O Modules -I/O Specifications- PLC functions - PLC Programming Languages-PLC Modes of Operation - Designing a Ladder Diagram for large process -Programming Timers-Programming counters.

Course Instructors:

S. Julius Fusic

H. Ramesh