Browsing by Author "Susheelkumar, G.N."

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    Implementation of model free fuzzy control on a novel magnetorheological elastomer-based handle for a rotary hammer
    (Institute of Physics, 2025) Kamath, N.; Shenoy, K.; Susheelkumar, G.N.; Gangadharan, K.V.
    This study presents a novel application of a Magnetorheological Elastomer-based handle (MREH) designed to improve the user’s comfort, specifically by reducing hand-arm vibrations. Various control logics were used on the MREH system attached to a rotary hammer to fully utilize the ability to adapt to various operating conditions, and each logic’s performance was evaluated. On/Off, PID, and fuzzy methods have been implemented in real-time. A case-based control logic where the frequency of the rotary hammer is given as an input to the control logic is developed to reduce the decision time as the events occur at a higher rate for on/off and fuzzy. PID gains are obtained directly from the experimental setup through PID autotuning. The performance of these logics is evaluated by performing a drilling operation on a M45 concrete block. Further, the fuzzy logic is investigated by operating at different locations on the same block. Based on the present research, fuzzy logic has demonstrated superior performance in aligning with the system by exhibiting a maximum 3 Hz increase from the natural frequency © 2025 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.
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    Preparation and dynamic characterization of polymer based magnetorheological elastomer for vibration isolator
    (2019) Susheelkumar, G.N.; Murigendrappa, S.M.; Gangadharan, K.V.
    In the present work preparation and dynamic characterization of polymer-based magnetorheological elastomer (MRE) is studied for vibration isolator. The magnetorheological elastomer is prepared with silicone rubber and carbonyl iron particles. Dynamic characterization of polymer-based MRE is done under different of Magnetic field, strain amplitude and frequency with rheometer. Experiment is carried out to find the shift frequency of MRE vibration isolator. Results shows the shear modules and loss factor of MRE changes with change in frequency, strain amplitude and magnetic field. the shift frequency of the 6 Hz from 30 Hz to 36 Hz that more effective in reducing the amplitude of vibration compared to passive isolator. � 2018 Author(s).
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    Preparation and dynamic characterization of polymer based magnetorheological elastomer for vibration isolator
    (American Institute of Physics Inc. subs@aip.org, 2019) Susheelkumar, G.N.; Murigendrappa, S.M.; Gangadharan, K.V.
    In the present work preparation and dynamic characterization of polymer-based magnetorheological elastomer (MRE) is studied for vibration isolator. The magnetorheological elastomer is prepared with silicone rubber and carbonyl iron particles. Dynamic characterization of polymer-based MRE is done under different of Magnetic field, strain amplitude and frequency with rheometer. Experiment is carried out to find the shift frequency of MRE vibration isolator. Results shows the shear modules and loss factor of MRE changes with change in frequency, strain amplitude and magnetic field. the shift frequency of the 6 Hz from 30 Hz to 36 Hz that more effective in reducing the amplitude of vibration compared to passive isolator. © 2018 Author(s).
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    Theoretical and experimental investigation of model-free adaptive fuzzy sliding mode control for MRE based adaptive tuned vibration absorber
    (Institute of Physics Publishing helen.craven@iop.org, 2019) Susheelkumar, G.N.; Murigendrappa, S.M.; Gangadharan, K.V.
    In the present study, the performance of model-free adaptive fuzzy sliding mode control (AFSC) for the magnetorheological elastomer based adaptive tuned vibration absorber (MRE ATVA) has been investigated theoretically and experimentally. A room temperature vulcanized silicone rubber and Carbonyl iron particles form the constituents of MRE. Sliding mode and AFSCs have been developed. The boundary layer is applied for sliding surface to reduce chattering effect in the sliding mode control, in case of the AFSC, two fuzzy systems approximate the equivalent control and switching control. The Lyapunov theorem evaluates the asymptotical stability of the developed adaptive control based on fuzzy systems. The performance is compared for both the controls subjected to single frequency excitation. Further, the AFSC has been investigated for variable frequency excitation. The maximum reduction of transmissibility of primary mass is 38.14%. Based on the present study, the model-free AFSC is more effective in tuning the natural frequency of MRE ATVA by 0.5 s with parameter uncertainties and under variable frequency excitation as compared to the boundary layer sliding mode control. © 2019 IOP Publishing Ltd.