Faculty Publications
Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736
Publications by NITK Faculty
Browse
3 results
Search Results
Item Vertical dynamic analysis of a quarter car suspension system with MR damper(Springer Verlag service@springer.de, 2017) Hemanth, K.; Kumar, H.; Gangadharan, K.V.This paper presents ride comfort and road holding analysis of passive and semi-active suspension system using quarter car model. Semi-active suspension system with magnetorheological (MR) damper was modeled as non-parametric model-based magnetic flux density in the fluid flow gap. The skyhook control strategy was used to analyze semi-active control performance. The simulation of passive and semi-active suspension system was carried out under random road profile for different velocities. The result shows that semi-active suspension has significant improvement in terms of ride comfort and road holding of vehicle than passive suspension system. Experimental studies have been conducted to characterize MR damper and a good match is observed between results with simulation results obtained using non-parametric model. © 2016, The Brazilian Society of Mechanical Sciences and Engineering.Item Design and Performance Analysis of a Switched Reluctance Motor Using Finite Element Analysis and Magnetic Equivalent Circuit Model(Defense Scientific Information and Documentation Centre, 2023) Bhaktha, S.B.; Kumawat, S.; Jeyaraj, J.; Gangadharan, K.V.By being magnet-free, and mechanically robust with a longer constant power range, switched reluctance motor (SRM) is gathering much attention as a potential choice to propel electric vehicles (EVs) and hybrid electric vehicles (HEVs). This paper comprehensively investigates the performance sensitivity to geometric design variables such as rotor diameter, pole arc angles, and yoke thicknesses for an SRM using static two-dimensional (2D) electromagnetic Finite-Element Analysis (FEA). The reason for the change in static characteristics due to variation in reluctance between SRM designs has not been detailed previously. This is addressed by the magnetic equivalent circuit (MEC) model that simplifies the design analysis. Results indicate that stator pole reluctance needs to be given due importance while studying the influence of rotor diameter. Also, it is imperative to set an adequate thickness of the stator and rotor yokes to minimize the effect of saturation on the performance. Rotor diameter and stator pole arc angle have a pronounced influence on the performance while the influence of rotor pole arc angle and yoke thicknesses was relatively less. © 2023, DESIDOC.Item Performance evaluation of magneto-rheological damper with spring accumulator and on-road testing by implementing in a four wheeler vehicle(Springer, 2025) Puneet, N.P.; Devikiran, P.; Kumar, H.; Gangadharan, K.V.Passenger vehicles running over roads are undergoing speedy updates every now and then in terms of design, luxury and passenger expectations. Above all, a passenger expects greater comfort in a vehicle throughout the journey. In many possible ways, semi-active suspension systems are proving themselves as optimum choice between passive and active systems. The present study emphasizes the performance analysis of a class of semi-active systems called magneto-rheological (MR) dampers. An MR damper suitable for a specific four wheeler vehicle with McPherson suspension system is designed and developed with a spring accumulator. The MR damper thus developed has undergone characterization testing subjected to variable input excitation conditions. The MR fluid for this damper is prepared in the laboratory. Sky-hook and ground-hook controllers are used as the current controlling devices. The developed MR damper is then used in the suspension system of the front half of the four wheeler vehicle for on-road testing. The developed damper showed about 20% improvement in the ride comfort level when used with the control strategies. © Indian Academy of Sciences 2025.