Sovan Sundar Dasgupta

Indian Institute of Technology Kharagpur

Papers

Total Citations

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About

Sovan Sundar Dasgupta is a leading figure in the field of nonlinear rotor dynamics and system modeling, with a particular focus on the complex interplay between flexible spinning shafts and their driving sources. His most cited work, the 2010 paper on "Bond Graph Modeling of an Internally Damped Nonideal Flexible Spinning Shaft" (29 citations), addresses a critical instability problem in rotor systems: the destabilizing effect of internal damping and nonconservative circulatory forces. Dasgupta’s key contribution lies in demonstrating that when the finite power of the drive is considered—what he terms a "nonideal" source—the rotor’s spin speed becomes entrained at the stability threshold, leading to a stable whirl orbit rather than unbounded instability. This insight bridges a gap between classical rotor dynamics and practical motor-load interactions, offering a more realistic framework for designing safer, high-speed rotating machinery. His work has been influential in mechanical and aerospace engineering, providing a bond graph methodology that elegantly captures energy flow and causality in complex mechatronic systems. Dasgupta’s research continues to inform the analysis of vibration, damping, and stability in rotating structures, making him a key reference for students and engineers tackling real-world rotor dynamics challenges.