https://dspace.iiti.ac.in:8080/jspui/handle/123456789/9661 2026-05-12T17:12:16Z 2026-05-12T17:12:16Z Pattabiraman, Venkatesh Kambil, Saurav Palani, I.A. [Guide] https://dspace.iiti.ac.in:8080/jspui/handle/123456789/10465 2025-05-30T06:38:11Z 2022-05-25T00:00:00Z

Title: Design, fabrication and control of a 3-D printed SMA actuated underwater robotic manipulator Authors: Pattabiraman, Venkatesh; Kambil, Saurav; Palani, I.A. [Guide] Abstract: The need for the usage of underwater robotic manipulators has increased proportionally with the attention to environmental challenges and resources, as well as general, scientific and military tasks and missions. ‘Underwater robotics’ is undoubtedly a rapidly growing study topic and a promising industry. R & D activities in the ROV & AUV communities have risen as advanced computing, new materials, sensory technology, and theoretical developments have been achieved. There are several underwater tasks that are challenging for direct manual execution. These tasks involve high risk due to the deep, unknown, hazardous territory, require high precision or are repetitive. This calls for a replacement of manual labor in the form of an underwater manipulator. This paper presents an innovative Shape Memory Alloy based Underwater Robotic Manipulator. Pre-existing study on underwater manipulators primarily uses primitive grippers with three to six degrees of freedom actuated via electric, motor-based or hydraulic means. The presented study showcases a novel design, incorporating a humanoid gripper, fabricated via 3-D printing with the material PLA (PolyLactic Acid) plastic - a highly biodegradable material, with seventeen degrees of freedom. The robotic hand is actuated by Shape Memory Alloy coil springs, the quietest actuation mode, thus ensuring that the aquatic life remains completely undisturbed. Special emphasis has been placed on the underwater feasibility and functionality of the design. As per this project, the adopted control mode for this manipulator is ON/OFF. Keywords: Robotics, Underwater Manipulator, Mechanical Design, 3-D Printing, Shape Memory Alloy, Control

2022-05-25T00:00:00Z Luthra, Aastha Sahu, Santosh Kumar [Guide] https://dspace.iiti.ac.in:8080/jspui/handle/123456789/10464 2025-05-30T06:38:11Z 2022-05-30T00:00:00Z

Title: Thermal management of electronic components by using phase change composite Authors: Luthra, Aastha; Sahu, Santosh Kumar [Guide] Abstract: The current investigative study is based on the thermal performance of a nano enhanced phase change material (NePCM) based thermal energy storage system for cooling of electronic components. The cooling technology based on NePCM filled heat sink (HS), is a passive method of cooling which can replace the cooling methods based on machinery example, fans. Copper oxide (CuO) and aluminium oxide (Al2O3) are used as nanoparticles, aluminium for HS material and paraffin wax is used as the phase change material (PCM) for the study. A constant volume fraction of 9%is considered for the fin material and different HS designs which are, heat sink without fin (HSNF), heat sink with square pin fins (HSSPF), and heat sink with circular pin fins (HSCPF) have been considered. For varied nanoparticle concentrations (∅=0.5 and 1) and for the same heat flux value (q′ =2.5 kW/m2 ), thermal performance of different HS designs is investigated. Up to 80°C, the HSSPF filled with PCM/NePCM performs better than the other two HS configurations considered in terms of thermal performance. Above this temperature, HSNF gives better results. HSSPF attains the highest value of enhancement ratio of 4.1 for SPT as 65℃.

2022-05-30T00:00:00Z Yogesh Singh, Jagandeep Miglani, Ankur [Guide] https://dspace.iiti.ac.in:8080/jspui/handle/123456789/10463 2025-05-30T06:38:11Z 2022-05-27T00:00:00Z

Title: Ignitability of bio-fuels Authors: Yogesh; Singh, Jagandeep; Miglani, Ankur [Guide] Abstract: The aim of this bachelor thesis is to explore unconventional fuels by studying their ignitability. The depletion of non-renewable energy sources has accelerated the need to look for renewable energy sources. Biofuels have shown encouraging characteristics in terms of clean energy and availability. The ignitibility is studied with respect to activation energy (Ea.). There are very few research papers analyzing the activation energy (Ea.) of such fuels and even fewer describing the ignitability. The similar fuels are grouped together, and results are compared with each other. We take samples of different fuels and study Thermal Gravimetric Analysis (TGA). Designate a suitable method to assess the Ea. and then implement it on TGA graphs. The conclusion reports the Ea. of different fuels and discusses insights on different patterns of Ea. of different fuel groups. We observe that the biodiesels have lower activation energy compared to their oils. The addition of halloysite slightly increases the activation energy of biomass but the additive is considered beneficial for the overall health of the boiler and furnace. The future work includes the study of different aspects of ignitability such as flame temperature, heat release rate, flash point, etc.

2022-05-27T00:00:00Z Sarda, Yash Deshmukh, Devendra [Guide] https://dspace.iiti.ac.in:8080/jspui/handle/123456789/10462 2025-05-30T06:38:10Z 2022-05-25T00:00:00Z

Title: Design development and aerodynamic analysis of an ornithopter Authors: Sarda, Yash; Deshmukh, Devendra [Guide] Abstract: In recent years the theme of flying vehicles propelled by flapping wings, often known as ornithopters, has attracted researchers because of its various applications in surveillance, monitoring and transport. Even with state-of-the-art FAVs (Flapping Aerial Vehicles), we are far away from achieving control and manoeuvrability of real insects and birds. Understanding the aerodynamics of flapping flight and structural patterns of birds’ wings is essential for developing robust and high performance flapping-wing aerial robots. The objective for this project is to design an ornithopter from scratch. Complete development procedure is described in the report so that the final product can be replicated easily. The development process includes analysis and evaluation of flapping mechanisms, theoretical model of flapping flight and prototype design. Forces and moments due to some critical unsteady aerodynamic mechanisms as well as static and dynamic stability of aircraft are studied to derive the vehicle's equations of motion under the symmetric flapping assumption. The aerodynamic model should accommodate most types of flapping mechanisms encountered in literature with slight modification in the code. The Ornithopter's design focuses on increasing its kinematic similarity to an actual bird by evaluating the feasibility and effectiveness of several flapping mechanisms. For this purpose, makeshift prototypes were made. The overall evaluation of the mechanism is based on ease of manufacturing, compactness, its bilateral symmetry, and kinematics involved with it. Keywords: Ornithopter, Flapping Flight, Mechanical Design, Aerodynamics

2022-05-25T00:00:00Z