Characteristic parameters estimation of active magnetic bearings in a coupled rotor system Sampath Kumar Kuppa, Mohit Lal Journal of Verification Validation and Uncertainty Quantification, 2019 Present research inspects the performance of rotor–bearing–coupling system in the presence of active magnetic bearings (AMBs). A methodology is suggested to quantify various fault characteristics along with AMB characteristic parameters of a coupled turbine generator system. A simplest possible turbogenerator system is modeled to analyze coupling misalignment. Conventional methodology to estimate dynamic system parameters based on forced response information is not enough for AMB-integrated rotor system because it requires current information along with displacement information. The controlling current of AMB is tuned and controlled with a controller of proportional–integral–derivative (PID) type. A numerical technique (Lagrange's equation) is applied to get equations of motion (EOM). Runge–Kutta technique is used to obtain EOM to acquire the time domain responses. The fast Fourier transformation (FFT) is applied on obtained responses to acquire responses in the frequency domain, and full spectrum technique is applied to propose the methodology. A methodology that depends on the least squares regression approach is proposed to evaluate the multifault parameters of AMB-integrated rotor system. The robustness of the algorithm is checked against various levels of noise and modeling error and observed efficient. An appreciable reduction in misalignment forces and moments is observed by using AMBs.
Characteristic parameter estimation of AMB supported coupled rotor system Sampath Kumar Kuppa, Mohit Lal ASME 2017 Gas Turbine India Conference Gtindia 2017, 2017 In this article, a rotor–bearing–coupling system supported by Active Magnetic Bearings (AMBs) is numerically simulated to estimate the characteristic parameters of AMB, residual unbalance, and misalignment parameters. The system is modeled with two rigid massless rotors each having a rigid disc and an AMB at its mid-span, mounted on flexible bearings and connected together with a flexible coupling. Proportional–Differential–Integrator (PID) is used to control the controlling current in AMB. Lagrange’s equation is used to obtain the linear equations of motion (EOMs) of the system. The developed EOM is solved by the fourth order Runga–Kutta method to generate the displacement and current responses. The time domain responses are converted into frequency domain by using Fast Fourier Transform (FFT) and full spectrum analysis is carried out to estimate the characteristic parameters of rotor AMB system. The estimation of parameters is performed based on least squares approach in frequency domain. The proposed methodology is tested against different levels of measurement error and modelling error to check the robustness of the algorithm.
RECENT SCHOLAR PUBLICATIONS
Characteristic Parameters Assessment of AMB and PID Controller Used in Vibration Control of Base-Excited Rotors M Lal, KS Kumar, AK Gautam Journal of The Institution of Engineers (India): Series C, 1-17 , 2026 2026
Development of an Interface to Identify the Unregistered Boarders Accessing Hostel Amenities P Mayank, S Nath, SK Kuppa, V Guruguntla, M Lal International Conference on Research into Design, 361-373 , 2025 2025
Trajectory Positioning of an Active Magnetic Bearing Integrated Coupled Rotor System Using PID and Sliding-Mode Controller SK Kuppa, J Pandia, M Lal 2024
Design optimization of drone BLDC motor for delivery service applications B Deepak, DP Singh, SK Kuppa, MJ Rao Materials Today: Proceedings , 2023 2023 Citations: 13
Tuning of PID Parameters for Misaligned Rotor Bearing System KS Kumar, M Lal International Conference on Vibration Engineering and Technology of … , 2021 2021 Citations: 1
Multiple Fault Parameters Estimation of an Active Magnetic Bearing Integrated Coupled–Rotor–Bearing System KS Kumar 2021
Characteristic parameters estimation of active magnetic bearings for varying controlling parameters SK Kuppa, M Lal Proceedings of the 6th National Symposium on Rotor Dynamics: NSRD 2019, 469-479 , 2020 2020 Citations: 1
Dynamic behaviour analysis of coupled rotor active magnetic bearing system in the supercritical frequency range SK Kuppa, M Lal Mechanism and machine theory 152, 103915 , 2020 2020 Citations: 20
Online Condition Monitoring of a Flexible Rotor System with the Help of Active Magnetic Bearings SK Kuppa, M Lal Advances in Rotor Dynamics, Control, and Structural Health Monitoring … , 2020 2020 Citations: 2
Characteristic parameters estimation of active magnetic bearings in a coupled rotor system SK Kuppa, M Lal Journal of Verification, Validation and Uncertainty Quantification 4 (3), 031001 , 2019 2019 Citations: 12
Dual flexible rotor system with active magnetic bearings for unbalance and coupling misalignment faults analysis SK Kuppa, M Lal Sādhanā 44 (8), 188 , 2019 2019 Citations: 21
Dynamic Behavior Analysis of Grass Trimmer Using Finite Element Method SK Kuppa, M Lal Research into Design for a Connected World: Proceedings of ICoRD 2019 Volume … , 2019 2019
Characteristic parameters estimation of uncertainties present in an active magnetic bearing integrated flexible rotor system using dynamic reduction technique SK Kuppa, M Lal International Conference on Rotor Dynamics, 234-248 , 2018 2018 Citations: 7
Characteristic parameter estimation of AMB supported coupled rotor system SK Kuppa, M Lal Gas Turbine India Conference 58516, V002T05A010 , 2017 2017 Citations: 11
MOST CITED SCHOLAR PUBLICATIONS
Dual flexible rotor system with active magnetic bearings for unbalance and coupling misalignment faults analysis SK Kuppa, M Lal Sādhanā 44 (8), 188 , 2019 2019 Citations: 21
Dynamic behaviour analysis of coupled rotor active magnetic bearing system in the supercritical frequency range SK Kuppa, M Lal Mechanism and machine theory 152, 103915 , 2020 2020 Citations: 20
Design optimization of drone BLDC motor for delivery service applications B Deepak, DP Singh, SK Kuppa, MJ Rao Materials Today: Proceedings , 2023 2023 Citations: 13
Characteristic parameters estimation of active magnetic bearings in a coupled rotor system SK Kuppa, M Lal Journal of Verification, Validation and Uncertainty Quantification 4 (3), 031001 , 2019 2019 Citations: 12
Characteristic parameter estimation of AMB supported coupled rotor system SK Kuppa, M Lal Gas Turbine India Conference 58516, V002T05A010 , 2017 2017 Citations: 11
Characteristic parameters estimation of uncertainties present in an active magnetic bearing integrated flexible rotor system using dynamic reduction technique SK Kuppa, M Lal International Conference on Rotor Dynamics, 234-248 , 2018 2018 Citations: 7
Online Condition Monitoring of a Flexible Rotor System with the Help of Active Magnetic Bearings SK Kuppa, M Lal Advances in Rotor Dynamics, Control, and Structural Health Monitoring … , 2020 2020 Citations: 2
Tuning of PID Parameters for Misaligned Rotor Bearing System KS Kumar, M Lal International Conference on Vibration Engineering and Technology of … , 2021 2021 Citations: 1
Characteristic parameters estimation of active magnetic bearings for varying controlling parameters SK Kuppa, M Lal Proceedings of the 6th National Symposium on Rotor Dynamics: NSRD 2019, 469-479 , 2020 2020 Citations: 1
Characteristic Parameters Assessment of AMB and PID Controller Used in Vibration Control of Base-Excited Rotors M Lal, KS Kumar, AK Gautam Journal of The Institution of Engineers (India): Series C, 1-17 , 2026 2026
Development of an Interface to Identify the Unregistered Boarders Accessing Hostel Amenities P Mayank, S Nath, SK Kuppa, V Guruguntla, M Lal International Conference on Research into Design, 361-373 , 2025 2025
Trajectory Positioning of an Active Magnetic Bearing Integrated Coupled Rotor System Using PID and Sliding-Mode Controller SK Kuppa, J Pandia, M Lal 2024
Multiple Fault Parameters Estimation of an Active Magnetic Bearing Integrated Coupled–Rotor–Bearing System KS Kumar 2021
Dynamic Behavior Analysis of Grass Trimmer Using Finite Element Method SK Kuppa, M Lal Research into Design for a Connected World: Proceedings of ICoRD 2019 Volume … , 2019 2019
