Digital Signal Processing

H. K. S. Randhawa ¹, P. K. Bansal ¹, Yaduvir Singh ²

Affiliations
1 Department of Electronics and Communication, Thapar University, Patiala, Punjab, IN
2 Department of Electrical and Instrumentation Engineering, Thapar University, Patiala, Punjab, IN

Abstract

The Viterbi algorithm is a dynamic programming algorithm for finding the most likely sequence of hidden states called the Viterbi path that results in a sequence of observed events, especially in the context of Markov models. In this research paper, SOVA has been implemented. The soft output Viterbi algorithm (SOVA) is a variant of the classical Viterbi algorithm. SOVA differs from the classical Viterbi algorithm in that it uses a modified path metric which takes into account the a priori probabilities of the input symbols, and produces a soft output indicating the reliability of the decision. Simulation results give the performance of this algorithm.

Keywords

Markov Models, Sova, Viterbi Algorithm.

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Subhransu Padhee , Yaduvir Singh

Abstract

The main objective of the experimental shell and tube heat exchanger presented in this paper is to control the temperature of outgoing fluid to a desired set point despite of different disturbances. The entire heat exchanger system is modeled using experimental data and a single-input, single-output transfer function model of the system is developed. Conventional controllers were designed for different control loops. Feedback and feed forward control loops were implemented to achieve the control objective. Soft computing approach was also implemented in the controller design methodology to give a requisite intelligence to the controller. A fuzzy-logic controller was designed and implemented in the process. A comparative study of different controller has been shown in this paper.

Keywords

Fuzzy Logic Controller, PID Controller, Shell and Tube Heat Exchanger.

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