Browsing by Author "Kalluvalappil, G."

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Design and experimental analysis of a non-magnetic cantilever beam in a remotely controlled free vibration setup using LabVIEW
(American Institute of Physics, 2025) Bidari, L.; Kamath, N.; Kaup, P.S.; Swamy, K.B.M.; Kalluvalappil, G.
Free vibration analysis finds a plethora of applications in real-world systems, ranging from deciding design factors to addressing maintenance concerns; hence, it forms a fundamental basis of material sciences and structural engineering. Cantilever structures are widespread across various physical systems, from domestic applications such as diving boards or parking shields to heavy-duty industrial applications such as airplane wings or windmill blades. In this paper, a non-magnetic cantilever beam is excited using a cam attached to a stepper motor. The trigger results in free vibrations of the cantilever beam and this data is collected by the accelerometer. The entire experiment is carried out distantly using LabVIEW remote panels, and frequency analysis and calculations are performed on the vibration data collected. The designed remote experimental setup provided near-accurate results for natural frequency calculation, and this is validated experimentally using an impact hammer and theoretically using physical parameters. The remote setup provides the freedom to model and simulate different physical conditions and systems as cantilever structures in the experimental environment. This results in an easy understanding of beam behavior in real-time systems. Â© 2025 Author(s).
Experimental investigation for vibration attenuation for power tools
(American Institute of Physics, 2025) Kamath, N.; Shenoy, P.; Tanappagol, P.S.; Rai, S.K.; Kalluvalappil, G.
Construction zones are often buzzing with "chatter"emanating from different machines. The most commonly used machines are hand-held power tools that handle materials such as bricks, concrete, and other masonry-related materials. The labourers are exposed to vibrations from the device during operation for a prolonged period, causing lasting damage to the hand-arm system. Many factors lead to the unpredictable behaviour of the machine, making it difficult to manoeuvre. Increased gripping forces result in the hand-arm system being a better vibration medium. To counteract this effect, smart materials can stabilise the system. Magnetorheological Elastomers are one such material that can solve the problem of stabilising the device as they can adapt to different conditions, providing semi-active isolation for a wide range of frequencies and demonstrating its force-dependent behaviour. A handle made of MRE can be used to replace the conventional handle at the chuck region. This paper presents how the handle behaves in static conditions under the influence of different magnetic fields for an impact hammer test. Â© 2025 Author(s).
Implementing indoor climate control using a cyber-physical systems approach
(American Institute of Physics, 2025) Verma, B.S.; Kamath, N.; Bidari, L.; Kalluvalappil, G.
Maintaining a comfortable temperature, reducing humidity, and optimizing airflow constitute indoor climate control. This improves the air quality by controlling moisture and regulating the air. Climate-sensitive situations, like those in Intensive Care Units (ICU) and laboratories that follow Bio-safety levels (BSL), heavily depend on this technology to ensure health and safety by keeping the environment sterile by manipulating the airflow. The extent of this technology is more comprehensive than these situations. This solution can benefit people living in harsh conditions where comfort and productivity are seldom limited. This study proposes a novel cyber-physical system (CPS) approach by considering individual parameters influencing indoor climate, such as temperature, humidity, and occupancy. A distributed approach where multiple custom-made units that house a microcontroller and sensors such as DHT-11, DHT-22, ENS160, and PIR motion sensor are kept in strategic locations that communicate with each other over Things board, and the air conditioning unit present in the enclosed space ensures optimal indoor climate control. Considering the occupancy data, the system adjusts itself in real time, optimizing energy consumption and leading to localized climate regulation. This study explores the application of control logic in a small-scale Peltier device system. The objective is to develop a control system that efficiently regulates the Peltier device's temperature. This study investigates control strategies, i.e., Proportional-Integral-Derivative (PID) control, to maintain precise temperature control in the system. The control method is analyzed for its effectiveness, robustness, and energy efficiency in the context of the Peltier device. A 3Â°C reduction was observed for 3 minutes in the scaled system. Â© 2025 Author(s).