Browsing by Author "Hemanth, K."

Filter results by typing the first few letters
Now showing 1 - 5 of 5
  • No Thumbnail Available
    Item
    Analysis of MR damper based on finite element approach
    (2014) Hemanth, K.; Ganesha, A.; Hemantha, K.; Gangadharan, K.V.
    A magneto rheological damper is a damper filled with magneto rheological fluid, which is controlled by a magnetic field. This allows the damping characteristics of the shock absorber to be continuously controlled by varying the force of the electromagnet. This type of shock absorber has several applications, most notably in semi-active vehicle suspensions which may adapt to road conditions, as they are monitored through sensors in the vehicle. This paper presents magnetic saturation analysis of non-parametric model of magnetorheological (MR) damper using ANSYS for improvement of the higher force with optimal current and MATLAB/Simulink simulation for quarter car model equipped with MR damper to conduct dynamic studies of the system using skyhook controller and comparative study for passive and semi-active system. � (2014) Trans Tech Publications, Switzerland.
  • No Thumbnail Available
    Item
    Analysis of MR damper based on finite element approach
    (Trans Tech Publications Ltd ttp@transtec.ch, 2014) Hemanth, K.; Ganesha, A.; Hemantha, K.; Gangadharan, K.V.
    A magneto rheological damper is a damper filled with magneto rheological fluid, which is controlled by a magnetic field. This allows the damping characteristics of the shock absorber to be continuously controlled by varying the force of the electromagnet. This type of shock absorber has several applications, most notably in semi-active vehicle suspensions which may adapt to road conditions, as they are monitored through sensors in the vehicle. This paper presents magnetic saturation analysis of non-parametric model of magnetorheological (MR) damper using ANSYS for improvement of the higher force with optimal current and MATLAB/Simulink simulation for quarter car model equipped with MR damper to conduct dynamic studies of the system using skyhook controller and comparative study for passive and semi-active system. © (2014) Trans Tech Publications, Switzerland.
  • No Thumbnail Available
    Item
    Dynamic analysis of half car model with MR damper as semi-active suspension element
    (International Institute of Acoustics and Vibrations P O Box 13 Auburn AL 36831, 2018) Hemanth, K.; Kumar, H.; Gangadharan, K.V.
    This paper presents the dynamic analysis of a half-car model with a magnetorheological (MR) damper subjected to random excitation. Experimental studies have been conducted to predict the behavior of the prototype twin-tube MR damper. The mathematical model of the prototype MR damper has been proposed by using the Bouc-Wen model. The half-car model with the MR damper has been used to predict the ride comfort and road holding performance. Comparative studies between the half-car model with the passive and semi-active suspension system with a proportional-integral-derivative (PID) control shows that the MR damper suspension system offers a good performance. © 2018 International Institute of Acoustics and Vibrations. All Rights Reserved.
  • No Thumbnail Available
    Item
    Modified protocol for secure mutual authentication in IoT smart homes
    (Institute of Electrical and Electronics Engineers Inc., 2021) Varsha, P.; Hemanth, K.; Raut, A.
    IoT platforms often face attacks as IoT platforms are generally resource-constrained and thus do not have enough computation power and memory to support standard security measures. In 2019, 'a secure lightweight mutual authentication and key exchange protocol for IoT smart home environment utilizing temporary identity keys and cumulative Keyed-hash chain' was proposed. A Cumulative Keyed-hash chain mechanism was introduced to ensure the sender's identity (through challenge-response). This authentication protocol emerged vulnerable to replay and parallel session attacks in the communication phase between controller and manufacturer nodes. This paper proposes a modified protocol which overcomes the vulnerabilities in authentication protocol and ensures secure mutual authentication between the nodes. Further, cryptanalysis of the old protocol and formal evaluation of the proposed protocol for vulnerabilities is done using the Automated Validation of Internet Security Protocols and Applications (AVISPA) toolkit to ensure the security of the proposed system. © 2021 IEEE.
  • No Thumbnail Available
    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.