A Study on Self-Learning Controller Design for DC-DC Power Converters
It is with great pleasure that we announce the publication of a research paper titled “Self-Learning Controller Design for DC-DC Power Converters with Enhanced Dynamic Performance,” jointly authored by Dr Tousif Khan N, Associate Professor, Department of Electrical and Electronics Engineering, and Dr Ramanjaneya Reddy & Dr Arghya Chakravarty, Assistant Professors, Department of Electrical and Electronics Engineering. The research paper introduces a novel self-learning control for precise output voltage tracking in DC-DC buck power converters.
Abstract:
This article introduces a self-learning robust control approach for accurate output voltage tracking in DC-DC buck power converters, focusing on scenarios with high precision requirements and significant load uncertainties. The method employs a simple online neural network to swiftly estimate unexpected load changes and disturbances across a wide range. Operating within a backstepping framework, the controller utilises neural network-learned uncertainties to enhance stability and improve dynamic and steady-state performance of both output voltage and inductor current. Extensive numerical simulations and practical experiments on a laboratory prototype demonstrate substantial enhancements in dynamic performance with a 94% reduction in settling time and precise steady-state tracking. The reliability of the proposed controller is further supported by the consistency between computational and experimental outcomes, showcasing its potential for real-world applications.
Practical implementations:
The proposed controller can be implemented/used for robotics applications, industrial processes, and medical equipment where precise control is needed.
Future research plans:
The following are the potential future directions of the proposed work;
(i) Design and development of the proposed self-learning neural network-based control for DC-DC buck converter systems with real-time DC sources, such as solar PV and fuel cells, experiencing highly intermittent input voltage changes.
(ii) Incorporating inductor current constraints and output voltage limitations into the proposed controller would also be an avenue worth exploring.
We congratulate the professors for their valuable contribution and look forward to future breakthroughs in this area.
- Published in Departmental News, EEE NEWS, News, Research News
Unveiling Findings on Thermo-Mechanical Behaviour of FGM Sandwich Plates
In a significant advancement in the field of material engineering, Dr Supen Kumar Sah, an esteemed Assistant Professor from the Department of Mechanical Engineering, has published a groundbreaking research paper.
The study, titled “Effect of Bi-Directional Material Gradation on Thermo-Mechanical Bending Response of Metal Ceramic FGM Sandwich Plates Using Inverse Trigonometric Shear Deformation Theory,” appears in the prestigious International Journal of Structural Integrity.
Dr Sah’s research provides new insights into the behaviour of Functionally Graded Materials (FGMs) under thermal and mechanical loads, which is crucial for the design of advanced engineering structures. His work employs an innovative inverse trigonometric shear deformation theory to analyse the bending response of metal-ceramic FGM sandwich plates, offering a more accurate prediction of their performance in real-world applications.
This publication not only highlights the cutting-edge research being conducted at SRM University but also positions Dr Sah as a leading figure in the application of FGMs in structural engineering. The findings from this paper have the potential to influence the design and optimization of materials used in various industries, from aerospace to automotive.
Abstract
The purpose of this study is to investigate the bending analysis of metal (Ti-6Al-4V) ceramic (ZrO_2) functionally graded material (FGM) sandwich plate having material property gradation along length and thickness direction under thermo-mechanical loading using inverse trigonometric shear deformation theory (ITSDT). Mechanical and thermal properties of BDFGM sandwich plates are considered temperature-dependent in the present study. Analytical solution for bending analysis of FGM plate has been carried out using Hamilton’s principle and Navier’s solution.
The present study shows that centre deflection, normal stress, and shear stress are significantly influenced by temperature-dependent material properties, bi-directional gradation exponents’ geometrical parameters, sandwich plate layer thickness, etc.
Title of the Research Paper in the Citation Format
Sah, S. K., Ghosh, A. (2024). Effect of Bi-Directional Material Gradation on Thermo-Mechanical Bending Response of Metal Ceramic FGM Sandwich Plates Using Inverse Trigonometric Shear Deformation Theory. International Journal Structural Integrity. DOI: 10.1108/IJSI-02-2024-0016
Collaborations
Prof Anup Ghosh, Indian Institute of Technology Kharagpur, India
Future Research Plans
Modelling and Analysis of porous uni and multi-directional Functionally Graded Material (FGM) plates to obtain the impact of porosity distributions over structural responses.
Analytical & Finite Element Solution for static and dynamic response of FGM sandwich plates employing non-polynomial shear deformation theories under elastic foundation.
Pictures Related to the Research
- Published in Departmental News, Mechanical Engineering NEWS, News, Research News
Advancing Knowledge: Publication of Groundbreaking Research Paper
It is a matter of immense pleasure for the Department of Electronics and Communication Engineering to announce the publication of Dr Duga Prakash, Associate Professor at SRM University-AP. His research paper titled “Analysis of GAA Junctionless NS FET towards Analog and RF Applications at 30 nm Regime”, published in IEEE Open Journal of Nanotechnology, studies how the device can be manufactured with ease and minimal doping, eliminating the need for high-temperature doping processes. The enhanced performance metrics suggest that the device’s potential for faster analog/RF switching circuits paves the way for more efficient analog and RF applications at the 30 nm scale.
Abstract:
A new nanosheet FET is used to generate a quantum model in this research. A Gate-all-around (GAA) Junction-less (JL) nanosheet device with a 1 nm gate dielectric of SiO2 and HfO2 performs according to the standard model. The visual TCAD tool examines ION, IOFF, ION/ IOFF, threshold voltage, DIBL, gain parameters (gm, gd, Av), gate capacitance, and cut-off frequency to evaluate the classical and quantum models of the GAA nanosheet device. Simulation results show that the device’s low gate capacitance of 10–18 makes it suitable for rapid switching applications. Device research reveals a transconductance (gm) value of 21 μS and a remarkable cut-off frequency of 9.03 GHz. Its P-type device response has also been extensively studied. Finally, the inverter model uses the proposed GAA nanosheet device. Despite having larger gate capacitance, the NSFET-based inverter offers the smallest propagation delay helps apply knowledge to real-world situations.
- Published in Departmental News, ECE NEWS, News, Research News
Exploring Contemporary Narratives in New Media
Department of Liberal Arts and the Department of Media Studies, under the aegis of the Easwari School of Liberal Arts at SRM University-AP organised its 2-day International Conference on New Media and its Publics in India. This prestigious conference welcomed renowned figures, including Mr Abhinandan Sekhri, co-founder and CEO of Newslaundry; Dr Ann Feldman, Documentarian and Activist; Dr Meheli Sen, Associate Professor, Department of AMESALL, Director of Cinema Studies Program, Rutgers University; Dr Pramod K Nayar, Professor and UNESCO Chair in Vulnerability Studies, Department of English, University of Hyderabad; Dr Sambaiah Gundimeda, Associate Professor, School of Interwoven Arts and Sciences, KREA University; Mr Rahee Punyashloka, Artist and Filmmaker and Ms Anuradha Nagaraj, Independent Journalist, Faculty at School of Development, Azim Premji University.
In his inaugural address, Vice Chancellor Prof. Manoj K Arora remarked, “We are honoured to host a conference of this magnitude. Media has become an indispensable facet of our contemporary existence; invariably, we all engage with or subscribe to media in some capacity.” Keynote speaker and co-founder of Newslaundry, Mr Abhinandan Sekhri, imparted his wisdom to the attendees, emphasising, “As the fourth pillar, media plays a pivotal role in society. It is imperative that we discern and uphold the principles of authentic journalism.” Prof. Vishnupad, Dean-Easwari School of Liberal Arts, remarked,” Technology and media have become an essential aspect of our lives today, and they have drastically altered our perception of things.”
Dr Meheli Sen, Dr Ann Feldman, Dr Pramod Nayar, Dr Sambaiah Gundimeda, Mr Rahee Punyashloka, and Ms Anuradha Nagarajan all deliberated on the various possibilities and interpretations that the New media offers and thereby shapes the public narratives. The conference also comprised a series of parallel sessions that explored the multifaceted relationship between New Media and various disciplines. Topics discussed included New Media and Literature, Gender, History, Democracy and Performance. Members of the academia presented their research papers, fostering insightful discussions on the evolving landscape of New Media.
The two-day event witnessed 150+ entries from students, scholars and faculties from across the country and the world and provided a platform for intellectual exchange but also fostered a collaborative spirit among participants. The conference concluded with a plenary address by Dr Pramod Nayar, which served as a catalyst for innovative thinking in New Media. Registrar Dr R Premkumar, in his message, applauded the efforts of the convenors, Dr Asijit Dutta and co-convenors Dr Sapna Mishra and Dr Partha Bhattacharjee for organising a scholarly colloquium such as this and remarked, “the exchange of ideas, scholarly debates, and interdisciplinary discussions that transpired here will undoubtedly enrich the academic landscape and advancement in the field of new media”.
- Published in Departmental News, Liberal Arts News, Media Studies, News