SAURABH PANDEY

@iiitkota.ac.in

Assistant Professor, Department of Electronics and Communication Engineering
Indian Institute of Information Technology Kota, MNIT Campus, Jaipur, Rajasthan, India

SAURABH PANDEY


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https://researchid.co/p.saurabh

EDUCATION

Postdoctoral Fellow, Dalian University of Technology, Dalian, P. R. China (November 2018 - October 2020)
Doctor of Philosophy from Indian Institute of Technology Guwahati, Assam, India in 2018
Bachelor of Technology from Gautam Buddh Technical University Lucknow, Uttar Pradesh, India in 2011

RESEARCH INTERESTS

System Identification, Relay Control Systems, Adaptive Parameter Estimation and Control, Data Driven Control, Non-linear Systems, Time Delay MIMO Systems, Modelling of Lithium-Ion Battery and SOC Estimation for EVs, HEVs, FCEVs Applications, Power Electronics and Process Control Applications.
12

Scopus Publications

307

Scholar Citations

10

Scholar h-index

11

Scholar i10-index

Scopus Publications

  • A new modelling and identification scheme for time-delay systems with experimental investigation: a relay feedback approach
    Saurabh Pandey, Somanath Majhi, Prasenjit Ghorai
    International Journal of Systems Science, 2017
    In this paper, the conventional relay feedback test has been modified for modelling and identification of a class of real-time dynamical systems in terms of linear transfer function models with time-delay. An ideal relay and unknown systems are connected through a negative feedback loop to bring the sustained oscillatory output around the non-zero setpoint. Thereafter, the obtained limit cycle information is substituted in the derived mathematical equations for accurate identification of unknown plants in terms of overdamped, underdamped, critically damped second-order plus dead time and stable first-order plus dead time transfer function models. Typical examples from the literature are included for the validation of the proposed identification scheme through computer simulations. Subsequently, the comparisons between estimated model and true system are drawn through integral absolute error criterion and frequency response plots. Finally, the obtained output responses through simulations are verified experimentally on real-time liquid level control system using Yokogawa Distributed Control System CENTUM CS3000 set up.
  • Identification and control of unstable FOPTD processes with improved transients
    S. Pandey, S. Majhi
    Electronics Letters, 2017
    A set of explicit expressions for an accurate identification of unstable first order plus time delay (FOPTD) process using single relay feedback test are deduced. Thereafter, tuning rules for a feedforward and feedback combination of proportional-integral and proportional controllers are proposed to enhance the closed loop transient performance. When the process output is distorted by measurement noise, a Fourier series based curve fitting technique is utilised for the reconstruction of true process output. Benchmark examples from literature are illustrated and thereafter comparisons are made to validate the effectiveness of the proposed identification and control scheme.
  • State space approach for identification of real-time plant dynamics
    Prasenjit Ghorai, Saurabh Pandey, Somanath Majhi
    2017 Indian Control Conference Icc 2017 Proceedings, 2017
    The paper presents a time domain based modelling and identification of real-time control system in terms of stable dynamics of first order plus dead time (FOPDT). An asymmetrical relay is commissioned for yielding limit cycle output from unknown plants. Thereafter, the limit cycle information is utilized in equations for real-time plant dynamics to be identified. Mathematical expressions based on the solution of state equation are utilized for bringing the accuracy in the identification of real plant dynamics. Computer Simulations are conducted on well known examples from literature to demonstrate the efficiency of the proposed scheme. Yokogawa Distributed Control System (DCS) with CENTUM CS3000 is considered here as an experimental platform for the realization of the relay feedback test and estimation of an unknown level control plant model followed by comparison through Nyquist plots with Zeigler Nichols method.
  • Modeling and Identification of Real-Time Processes Based on Nonzero Setpoint Autotuning Test
    Prasenjit Ghorai, Somanath Majhi, Saurabh Pandey
    Journal of Dynamic Systems Measurement and Control Transactions of the ASME, 2017
    The paper presents a real-time system modeling and identification scheme for estimation of plant model parameters using a single asymmetrical relay test. A modified set of analytical expressions for unknown plant models under nonzero setpoint and non-negative relay settings is derived. Thereafter, the unknown parameters of three different stable plant models are identified as first-order plus dead time, overdamped, and critically damped second-order plus dead time. The well-known examples from literature are included to show the accuracy of the proposed method through computer simulations. Yokogawa distributed control system centum CS3000 is considered as a design platform for an experimental setup for the realization of asymmetrical relay feedback test. Finally, the transfer function models derived from successive identification of plant dynamics are compared with the literature through Nyquist plots.
  • Limit cycle-based exact estimation of FOPDT process parameters under input/output disturbances: a state-space approach
    Saurabh Pandey, Somanath Majhi
    International Journal of Systems Science, 2017
    A set of novel explicit expressions for the identification of stable, unstable and integrating first-order plus dead time process dynamics is presented. In the absence of sensor noise/static load disturbances, an autonomous relay control system with an asymmetrical relay induces a smooth limit cycle at the process output. Dynamic model parameters are estimated using the set of proposed expressions which depend on the parameters of limit cycle output and its derivatives. However, in practice, the process output is generally corrupted by the measurement noise, thereby rendering an erroneous identification of process dynamics. Furthermore, static load disturbance during an identification test also induces an asymmetrical limit cycle output resulting in inaccurate measurements. Hence, a fast Fourier transform technique and biased relay feedback methods are implemented to obviate the problem of asymmetries and chattering in the limit cycle output yielding the original limit cycle and its subsequent derivatives. The proposed method has been validated, considering five typical examples from literature. An extensive comparison study with existing approaches based on Nyquist plots demonstrate the efficacy of the method presented.
  • A new relay feedback scheme for identification of non-minimum phase processes with time delay
    Prasenjit Ghorai, Saurabh Pandey, Somanath Majhi
    2016 IEEE 55th Conference on Decision and Control Cdc 2016, 2016
    In this paper, attempt is made to explore real time plant modelling based on asymmetrical relay feedback test with step input as an excitation signal. The simulated and experimental investigations result in a set of modified analytical expressions for identification of stable first order plus dead time, non-minimum phase first order plus dead time and over-damped non-minimum phase second order plus dead time processes. These expressions are further utilized for identification of processes in presence of measurement noise using curve fitting tool. Well known examples from literature are included for validation of proposed modelling and identification scheme. Yokogawa distributed control system centum CS3000 with field instruments are utilized for conducting real time experiment on level control system.
  • Limit cycle based identification of second order processes with time delay
    Saurabh Pandey, Somanath Majhi
    2016 Indian Control Conference Icc 2016 Proceedings, 2016
    General equations for the identification of stable and unstable second order plus dead time (SOPDT) processes are proposed in this paper. During feedback test, a nonlinear device (relay) is connected to process with a phase lag of n radians yielding sustained oscillations known as limit cycle. With the help of describing function (DF) approximation, equivalent gain of an asymmetrical relay is derived and thereafter used in the derivation of mathematical equations for the identification of process dynamics. When a process output is subjected to measurement noise, relay output shows spurious switching which brings chattering in the limit cycle output. In order to retrieve a clean limit cycle output, Fourier series based curve fitting method is implemented. Using frequency response plots, the efficacy of the proposed methodology is drawn through comparisons between actual and estimated process models.
  • Frequency domain based identification of processes using limit cycle information
    Saurabh Pandey, Somanath Majhi
    2015 International Conference on Industrial Instrumentation and Control Icic 2015, 2015
    In this paper, general expressions for the identification of various processes in terms of a stable and unstable first order plus dead time (FOPDT) models are derived. During the identification test, a nonlinear device (relay) is connected to an unknown process through a feedback path which yields sustained oscillations known as limit cycle. The equivalent gain of an asymmetrical relay is approximated by describing function (DF) approach and further used in the deduction of mathematical expressions for process identification. When the process output is subjected to measurement noise, multiple switching at the relay output brings chattering at the output. Therefore, a Fourier series based curve fitting method is utilized in order to retrieve a clean limit cycle output. Further, to show the supremacy of the proposed method comparisons between estimated and actual process models are drawn using frequency response plots.
  • Estimation of process dynamics using biased relay feedback approach
    Saurabh Pandey, Somanath Majhi
    IFAC Proceedings Volumes IFAC Papersonline, 2014
    In this paper, a set of novel expressions for the identification of stable and unstable first order plus time delay (FOPTD) processes are derived. Using feedback compensation scheme a biased relay is connected to process which yields limit cycle output. Subsequently, from a limit cycle and its first derivative information explicit expressions for the process model parameters are developed. When the process output is subjected to measurement noise, chattering in relay output becomes the source of noisy limit cycle. The consequences of measurement noise are suppressed by discrete cosine transform (DCT) with a proper threshold parameter selection for the reconstruction of original limit cycle. Two well known examples are included to illustrate the effectiveness of the proposed method. Also, a comparison is drawn between estimated and actual system using frequency response plots.
  • Identification of FOPDT and SOPDT process dynamics using closed loop test
    Raghunath Bajarangbali, Somanath Majhi, Saurabh Pandey
    ISA Transactions, 2014
  • Relay based identification of process dynamics under noisy environment
    Saurabh Pandey, Somanath Majhi
    Care 2013 2013 IEEE International Conference on Control Automation Robotics and Embedded Systems Proceedings, 2013
  • Identification of system dynamics in presence of measurement noise
    Saurabh Pandey, Somanath Majhi
    2013 Annual IEEE India Conference Indicon 2013, 2013

RECENT SCHOLAR PUBLICATIONS

  • Effect of Irrigation Scheduling under Different Crop Establishment Methods on Yield Attributes, Yield and Economics of Wheat
    SP Singh, P Kumar, A Shri, H Om, AK Singh, S Sinha, SR Choudhury, ...
    Journal of Scientific Research and Reports 32 (5), 510-518 , 2026
    2026
  • Existence of sustained oscillations in continuous-time stable and unstable systems with time delay
    S Pandey
    Proceedings of the National Academy of Sciences, India Section A: Physical … , 2026
    2026
  • A Sampling Time-Based Comprehensive Analysis of Finite Control Set MPC for the Solar PV-fed Quadruple Boost Multilevel Inverter
    VK Singh, B Chikondra, S Pandey, M Badoni, R Tripathi
    IET Electric Power Applications, 1-12 , 2026
    2026
  • A Three-Phase Switched Capacitor Multilevel Inverter with Integrated Quadruple Voltage Amplification for PV Applications
    VK Singh, B Chikondra, S Pandey
    Available at SSRN 5761182 136, 1-17 , 2026
    2026
  • Modeling of Energy Storage System Using Limit Cycle Analysis
    S Pandey, B Chikondra, VK Singh
    Proceedings of 12th National Power Electronics Conference (NPEC) 12, 1-6 , 2025
    2025
  • Fast power-up scheme for current mirrors
    S Pandey
    US Patent App. 19/199,525 , 2025
    2025
  • Frequency Domain Based Identification of Non-minimum Phase Systems
    S Pandey, S Majhi
    IFAC Proceedings Volume, 1-6 , 2025
    2025
  • Fast power-up scheme for current mirrors
    S Pandey
    US Patent 12,292,755 , 2025
    2025
  • Sampled Wiener Time Delay System Identification
    S Pandey
    IEEE Transactions on Circuits and Systems II: Express Briefs 72 (4), 573-577 , 2025
    2025
    Citations: 3
  • Active Neutral Point Clamped Voltage Source Inverter fed Five Phase Induction Motor Drive Using Carrier Based PWM
    B Chikondra, VK Singh, S Pandey
    Proceedings of IEEE Energy Conversion Congress & Exposition Asia (ECCE-Asia … , 2025
    2025
  • A Nine-Level Switched-Capacitor Based Quadruple Boost Inverter Using Finite Control Set MPC
    VK Singh, B Chikondra, S Pandey, R Tripathi, M Badoni
    Proceedings of IEEE Energy Conversion Congress & Exposition Asia (ECCE-Asia … , 2025
    2025
  • Effect of different phosphorus levels and varieties on growth attributes of mungbean under custard apple-based agri-horti system.
    P Kumar, A Yadav, AK Singh, DB Singh, H Om, S Roychaudhary, A Das, ...
    2024
  • Modelling and Identification of Lithium-ion Battery using Relay Feedback Response
    S Pandey, B Chikondra, VK Singh
    11th IEEE International Conference on Power Electronics Drives and Energy … , 2024
    2024
  • Parameter Identification and Control of Integrating Time Delay Systems
    S Pandey, S Majhi
    10th IEEE Indian Control Conference (ICC), IISER Bhopal, India, 1-6 , 2024
    2024
  • Pearl Millet Performance Affected by Tree Leaf Mulch Under Custard Apple Based Agri-horti System
    P KUMAR, AK SINGH, R KUMAR, RAMK SINGH, H OM, ...
    Journal of AgriSearch 11 (1), 05-08 , 2024
    2024
  • Limit cycle based identification of two-input two-output systems with time delay
    S Pandey
    IFAC Proceedings Volume 57, 421-426 , 2024
    2024
    Citations: 1
  • Relay based modelling of cascaded systems with propagation delay
    S Pandey
    IFAC Proceedings Volume 57, 415-420 , 2024
    2024
    Citations: 1
  • INTERACTION EFFECT OF DIFFERENT PHOSPHORUS LEVELS AND VARIETIES OF MUNGBEAN UNDER CUSTARD APPLE BASED AGRI-HORTI SYSTEM
    P KUMAR, A YADAV, JS BOHRA, AK SINGH, H OM, S KUMAR, ...
    INTERNATIONAL JOURNAL OF RESEARCH 7 (9S), 231-235 , 2024
    2024
  • Modeling and estimation of dynamics of time-delayed plants/processes: P. Ghorai et al.
    P Ghorai, S Majhi, A Eskandarian, S Pandey, VR Kasi
    International Journal of Dynamics and Control 11 (1), 183-193 , 2023
    2023
    Citations: 3
  • Modeling of Integrating and Non-minimum Phase Dynamics using Limit Cycles
    S Pandey, S Majhi
    61st IEEE Conference on Decision and Control (CDC), Cancún, Mexico, 1330-1335 , 2022
    2022
    Citations: 4

MOST CITED SCHOLAR PUBLICATIONS

  • Identification of FOPDT and SOPDT process dynamics using closed loop test
    R Bajarangbali, S Majhi, S Pandey
    ISA Transactions 53 (4), 1223-1231 , 2014
    2014
    Citations: 61
  • Parameter identification of delayed under-damped systems using on-line relay autotuning
    P Ghorai, S Majhi, VR Kasi, S Pandey
    IEEE Transactions on Circuits and Systems II: Express Briefs 66 (7), 1197-1201 , 2018
    2018
    Citations: 30
  • Systems and methods for controlling slip
    S Pandey, MA Caruthers, RJ Skiba
    US Patent 7,337,054 , 2008
    2008
    Citations: 25
  • System identification under relay and PI control
    S Pandey, S Majhi
    IEEE Transactions on Circuits and Systems II: Express Briefs 67 (6), 1089-1093 , 2020
    2020
    Citations: 16
  • Relay‐based identification scheme for processes with non‐minimum phase and time delay
    S Pandey, S Majhi
    IET Control Theory & Applications 13 (15), 2507-2519 , 2019
    2019
    Citations: 14
  • Dynamic Model Identification of a Real-Time Simple Level Control System
    P Ghorai, S Majhi, S Pandey
    Journal of Control and Decision 3 (1), 248-266 , 2016
    2016
    Citations: 13
  • System for controlling a power output
    H Du, TL Marcott, S Pandey
    US Patent 7,536,856 , 2009
    2009
    Citations: 13
  • Identification and Control of Unstable FOPTD Processes with Improved Transients
    S Pandey, S Majhi
    IET Electronics Letters 53 (5), 312-314 , 2017
    2017
    Citations: 12
  • A New Modelling and Identification Scheme for Time Delay Systems with Experimental Investigation: A Relay Feedback Approach
    S Pandey, S Majhi, P Ghorai
    International Journal of Systems Science 48 (9), 1932-1940 , 2017
    2017
    Citations: 12
  • A Real-Time Approach for Dead-Time Plant Transfer Function Modeling Based on Relay Autotuning
    P Ghorai, S Majhi, S Pandey
    International Journal of Dynamics and Control, 1-11 , 2017
    2017
    Citations: 11
  • Brake control system for an electric drive vehicle
    H Du, S Pandey, TM Sopko, ED Stemler, MJ Barngrover, BD Kuras
    US Patent 7,493,205 , 2009
    2009
    Citations: 10
  • Limit cycle-based exact estimation of FOPDT process parameters under input/output disturbances: a state-space approach
    S Pandey, S Majhi
    International Journal of Systems Science 48 (1), 118-127 , 2017
    2017
    Citations: 9
  • Modelling and Identification of Real Time Processes based on Non-zero Setpoint Autotuning Test
    P Ghorai, S Majhi, S Pandey
    Journal of Dynamic Systems, Measurement and Control 139 (1), 021010-1-021010-8 , 2017
    2017
    Citations: 8
  • A New Relay Feedback Scheme for Identification of Non-minimum Phase Processes with Time Delay
    P Ghorai, S Pandey, S Majhi
    55th IEEE Conference on Decision and Control, Las Vegas, USA, 2073-2078 , 2016
    2016
    Citations: 8
  • Grüneisen parameter for liquid alkali metals
    US Tandon, SK Pandey
    Physics Letters A 41 (2), 161-162 , 1972
    1972
    Citations: 7
  • Limit Cycle based Identification of Second Order Processes with Time Delay
    S Pandey, S Majhi
    2nd Indian Control Conference, IIT Hyderabad, India , 2016
    2016
    Citations: 6
  • Parametric identification of output error model for sampled systems with integer‐type time delay subject to load disturbance with unknown dynamics
    S Pandey, T Liu, QG Wang
    IET Control Theory & Applications 15 (15), 1942-1955 , 2021
    2021
    Citations: 5
  • Estimation of Process Dynamics Using Biased Relay Feedback Approach
    S Pandey, S Majhi
    IFAC Proceedings Volume 47 (1), 913-916 , 2014
    2014
    Citations: 5
  • Identification of system dynamics in presence of measurement noise
    S Pandey, S Majhi
    10th Annual IEEE India Conference (INDICON), IIT Bombay, 1-6 , 2013
    2013
    Citations: 5
  • Modeling of Integrating and Non-minimum Phase Dynamics using Limit Cycles
    S Pandey, S Majhi
    61st IEEE Conference on Decision and Control (CDC), Cancún, Mexico, 1330-1335 , 2022
    2022
    Citations: 4

Publications

Saurabh Pandey, Tao Liu, Qing-Guo Wang, “Parametric identification of sampled systems with time delay subject to load disturbance with unknown dynamics”, IET Control Theory & Applications (Wiley), vol. 15, issue 15, pp. 1942-1955, 2021. DOI: . [SCI].