Asok Ray

    • 6887 Citations
    • 36 h-Index
    1976 …2019
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    Research Output 1976 2019

    2008
    13 Citations (Scopus)

    Data-driven fault detection and estimation in thermal pulse combustors

    Chakraborty, S., Gupta, S., Ray, A. & Mukhopadhyay, A., Dec 15 2008, In : Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 222, 8, p. 1097-1108 12 p.

    Research output: Contribution to journalArticle

    Combustors
    Fault detection
    Parameter estimation
    Information theory
    Pattern recognition

    Early detection of fatigue damage using escort distributions of ultrasonic data sequences

    Singh, D. S., Gupta, S., Chakraborthy, S. & Ray, A., Sep 30 2008, 2008 American Control Conference, ACC. p. 4286-4291 6 p. 4587167. (Proceedings of the American Control Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Fatigue damage
    Ultrasonics
    Statistical mechanics
    Large scale systems
    Crystalline materials
    1 Citation (Scopus)

    Estimation of multiple parameters in dynamical systems

    Rao, C., Mukherjee, K., Sarkar, S. & Ray, A., Sep 30 2008, 2008 American Control Conference, ACC. p. 1292-1297 6 p. 4586671. (Proceedings of the American Control Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Dynamical systems
    Parameter estimation
    18 Citations (Scopus)

    Estimation of slowly varying parameters in nonlinear systems via symbolic dynamic filtering

    Rajagopalan, V., Chakraborty, S. & Ray, A., Feb 1 2008, In : Signal Processing. 88, 2, p. 339-348 10 p.

    Research output: Contribution to journalArticle

    Finite automata
    Nonlinear systems
    Time series
    Nonlinear dynamical systems
    Parameter estimation
    5 Citations (Scopus)

    Failure precursor detection in complex electrical systems using symbolic dynamics

    Patankar, R. P., Rajagopalan, V. & Ray, A., Jan 1 2008, In : International Journal of Signal and Imaging Systems Engineering. 1, 1, p. 68-77 10 p.

    Research output: Contribution to journalArticle

    Principal component analysis
    Pattern recognition
    Signal processing
    Neural networks
    Degradation
    40 Citations (Scopus)

    Fault detection and isolation in aircraft gas turbine engines. Part 1: Underlying concept

    Gupta, S., Ray, A., Sarkar, S. & Yasar, M., Jun 30 2008, In : Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 222, 3, p. 307-318 12 p.

    Research output: Contribution to journalArticle

    Fault detection
    Gas turbines
    Turbines
    Aircraft
    Aircraft engines
    25 Citations (Scopus)

    Fault detection and isolation in aircraft gas turbine engines. Part 2: Validation on a simulation test bed

    Sarkar, S., Yasar, M., Gupta, S., Ray, A. & Mukherjee, K., Jun 30 2008, In : Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 222, 3, p. 319-330 12 p.

    Research output: Contribution to journalArticle

    Fault detection
    Gas turbines
    Turbines
    Aircraft
    Engines
    1 Citation (Scopus)

    Fault diagnosis and isolation in aircraft gas turbine engines

    Sarkar, S., Mukherjee, K., Ray, A. & Yasar, M., Sep 30 2008, 2008 American Control Conference, ACC. p. 2166-2171 6 p. 4586813

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Failure analysis
    Gas turbines
    Turbines
    Aircraft
    Turbofan engines
    2 Citations (Scopus)

    Generalised projections in finite state automata and decidability of state determinacy

    Chattopadhyay, I. & Ray, A., Oct 1 2008, In : International Journal of Control. 81, 10, p. 1626-1644 19 p.

    Research output: Contribution to journalArticle

    Computability and decidability
    Discrete event simulation
    Finite automata
    Observability
    Telecommunication links

    L*: An intelligent path planning algorithm based on renormalized measure of probabilistic regular languages

    Chattopadhyay, I., Mallapragada, G. & Ray, A., Sep 30 2008, 2008 American Control Conference, ACC. p. 1249-1254 6 p. 4586664. (Proceedings of the American Control Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Formal languages
    Motion planning
    Finite automata
    Navigation
    Robotics
    61 Citations (Scopus)

    Space partitioning via Hilbert transform for symbolic time series analysis

    Subbu, A. & Ray, A., Mar 6 2008, In : Applied Physics Letters. 92, 8, 084107.

    Research output: Contribution to journalArticle

    time series analysis
    dynamical systems
    15 Citations (Scopus)

    Statistical pattern analysis of ultrasonic signals for fatigue damage detection in mechanical structures

    Gupta, S., Singh, D. S. & Ray, A., Oct 1 2008, In : NDT and E International. 41, 7, p. 491-500 10 p.

    Research output: Contribution to journalArticle

    Damage detection
    Fatigue damage
    ultrasonics
    Ultrasonics
    damage
    27 Citations (Scopus)

    Structural transformations of probabilistic finite state machines

    Chattopadhyay, I. & Ray, A., May 1 2008, In : International Journal of Control. 81, 5, p. 820-835 16 p.

    Research output: Contribution to journalArticle

    Finite automata
    Pattern recognition
    Nonlinear dynamical systems
    Chemical analysis
    1 Citation (Scopus)

    Symbolic identification and anomaly detection in complex dynamical systems

    Chakraborty, S., Sarkar, S. & Ray, A., Sep 30 2008, 2008 American Control Conference, ACC. p. 2792-2797 6 p. 4586916. (Proceedings of the American Control Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Dynamical systems
    Automata theory
    Formal languages
    Disturbance rejection
    Information theory
    4 Citations (Scopus)

    Trend detection and data mining via wavelet and Hilbert-Huang transforms

    Yasar, M. & Ray, A., Sep 30 2008, 2008 American Control Conference, ACC. p. 4292-4297 6 p. 4587168. (Proceedings of the American Control Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Data mining
    Nonlinear filtering
    Data fusion
    Wavelet transforms
    Monitoring
    2007

    A new approach for robust on line PEFC sensors using symbolic dynamics

    Bhambare, K. S., Gupta, S., Mench, M. M. & Ray, A., Dec 1 2007, 2007 AIChE Annual Meeting. (2007 AIChE Annual Meeting).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Carbon Monoxide
    Fuel cells
    Sensors
    Degradation
    Catalysts

    A new approach for robust on line PEFC sensors using symbolic dynamics

    Bhambare, K. S., Gupta, S., Mench, M. M. & Ray, A., Dec 1 2007, 2007 AIChE Annual Meeting. (AIChE Annual Meeting, Conference Proceedings).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Carbon Monoxide
    Fuel cells
    Sensors
    Automata theory
    Information theory

    A symbolic dynamics based approach to pattern recognition in image sequences

    Subbu, A., Keller, E. E. & Ray, A., 2007, Proceedings of the 2007 International Conference on Image Processing, Computer Vision, and Pattern Recognition, IPCV 2007. p. 383-389 7 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Image registration
    Dynamic analysis
    Pattern recognition
    Microscopes
    Pixels
    6 Citations (Scopus)

    Dynamic information fusion driven design of urban sensor networks

    Phoha, S. & Ray, A., Oct 1 2007, 2007 IEEE International Conference on Networking, Sensing and Control, ICNSC'07. p. 1-6 6 p. 4238954

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Information fusion
    Sensor networks
    Sensors
    Electromechanical devices
    Intelligent agents

    Estimation of fatigue life using ultrasonic sensing: A symbolic dynamics approach

    Gupta, S. & Ray, A., Dec 1 2007, Proceedings of the 2007 American Control Conference, ACC. p. 1149-1154 6 p. 4282229

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Ultrasonics
    Fatigue of materials
    Time series analysis
    Ultrasonic sensors
    Fatigue damage

    Generalized language measure families of probabilistic finite state systems

    Chattopadhyay, I. & Ray, A., May 1 2007, In : International Journal of Control. 80, 5, p. 789-799 11 p.

    Research output: Contribution to journalArticle

    Formal languages
    Discrete event simulation
    Chemical analysis
    2 Citations (Scopus)

    Generalized projections in finite state automata & decidability of state determinacy

    Chattopadhyay, I. & Ray, A., Dec 1 2007, Proceedings of the 2007 American Control Conference, ACC. p. 5664-5669 6 p. 4282235. (Proceedings of the American Control Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Computability and decidability
    Discrete event simulation
    Finite automata
    Observability
    Telecommunication links
    8 Citations (Scopus)

    Hierarchical control of aircraft propulsion systems: Discrete event supervisor approach

    Yasar, M. & Ray, A., Feb 1 2007, In : Control Engineering Practice. 15, 2, p. 149-162 14 p.

    Research output: Contribution to journalArticle

    Aircraft propulsion
    Hierarchical Control
    Discrete Event Systems
    Discrete Event
    Supervisory personnel
    2 Citations (Scopus)

    Irreversibility-based measure of slowly evolving anomalies

    Srivastav, A., Ray, A. & Gupta, S., Dec 1 2007, Proceedings of the 2007 American Control Conference, ACC. p. 3228-3233 6 p. 4282880. (Proceedings of the American Control Conference).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Trajectories
    Fatigue damage
    Crack initiation
    Aluminum alloys
    Crack propagation
    2 Citations (Scopus)

    Language-measure-theoretic optimal control of probabilistic finite-state systems

    Chattopadhyay, I. & Ray, A., Dec 1 2007, Proceedings of the 46th IEEE Conference on Decision and Control 2007, CDC. p. 5930-5935 6 p. 4434495. (Proceedings of the IEEE Conference on Decision and Control).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Vector Measures
    Supervisory Control
    Formal languages
    Discrete Event Systems
    Formal Languages
    27 Citations (Scopus)

    Language-measure-theoretic optimal control of probabilistic finite-state systems

    Chattopadhyay, I. & Ray, A., Aug 1 2007, In : International Journal of Control. 80, 8, p. 1271-1290 20 p.

    Research output: Contribution to journalArticle

    Formal languages
    Supervisory personnel
    Discrete event simulation
    Control theory
    6 Citations (Scopus)

    Modelling and system identification of an experimental apparatus for anomaly detection in mechanical systems

    Khatkhate, A. M., Ray, A. & Keller, E., Apr 1 2007, In : Applied Mathematical Modelling. 31, 4, p. 734-748 15 p.

    Research output: Contribution to journalArticle

    Anomaly Detection
    System Identification
    Mechanical Systems
    Identification (control systems)
    Durability
    29 Citations (Scopus)

    Online fatigue damage monitoring by ultrasonic measurements: A symbolic dynamics approach

    Gupta, S., Ray, A. & Keller, E., Jun 1 2007, In : International Journal of Fatigue. 29, 6, p. 1100-1114 15 p.

    Research output: Contribution to journalArticle

    Ultrasonic measurement
    Fatigue Damage
    Symbolic Dynamics
    Fatigue damage
    Monitoring
    30 Citations (Scopus)

    Pattern identification in dynamical systems via symbolic time series analysis

    Rajagopalan, V., Ray, A., Samsi, R. & Mayer, J., Nov 1 2007, In : Pattern Recognition. 40, 11, p. 2897-2907 11 p.

    Research output: Contribution to journalArticle

    Time series analysis
    Finite automata
    Time series
    Dynamical systems
    Automata theory
    15 Citations (Scopus)

    Pattern identification using lattice spin systems: A thermodynamic formalism

    Gupta, S. & Ray, A., Nov 19 2007, In : Applied Physics Letters. 91, 19, 194105.

    Research output: Contribution to journalArticle

    formalism
    thermodynamics
    dynamical systems
    anomalies
    deviation
    2 Citations (Scopus)

    Prognosis of failure precursor in complex electrical systems using symbolic dynamics

    Patankar, R., Rajagopalan, V., Tolani, D., Ray, A. & Begin, M., Dec 1 2007, Proceedings of the 2007 American Control Conference, ACC. p. 1846-1851 6 p. 4282219

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Pattern recognition
    Networks (circuits)
    Information theory
    Finite automata
    Principal component analysis
    53 Citations (Scopus)

    Real-time fatigue life estimation in mechanical structures

    Gupta, S. & Ray, A., Jul 1 2007, In : Measurement Science and Technology. 18, 7, p. 1947-1957 11 p., 022.

    Research output: Contribution to journalArticle

    fatigue life
    Fatigue Life
    Fault
    Fatigue of materials
    Real-time
    78 Citations (Scopus)

    Symbolic time series analysis of ultrasonic data for early detection of fatigue damage

    Gupta, S., Ray, A. & Keller, E., Feb 1 2007, In : Mechanical Systems and Signal Processing. 21, 2, p. 866-884 19 p.

    Research output: Contribution to journalArticle

    Time series analysis
    Fatigue damage
    Ultrasonics
    Automata theory
    Ultrasonic sensors
    2006
    3 Citations (Scopus)

    A language measure for partially observed discrete event systems

    Chattopadhyay, I. & Ray, A., Sep 1 2006, In : International Journal of Control. 79, 9, p. 1074-1086 13 p.

    Research output: Contribution to journalArticle

    Discrete event simulation
    Formal languages
    Control systems
    Chemical analysis
    26 Citations (Scopus)

    Anomaly detection in aircraft gas turbine engines

    Tolani, D., Yasar, M., Ray, A. & Yang, V., Feb 1 2006, In : Journal of Aerospace Computing, Information and Communication. 3, 2, p. 44-51 8 p.

    Research output: Contribution to journalArticle

    Time series analysis
    Principal component analysis
    Propulsion
    Gas turbines
    Time series
    20 Citations (Scopus)
    Time series analysis
    Combustors
    Time series
    Dynamic models
    Friction
    2 Citations (Scopus)

    Autonomous navigation of mobile robots using optimal control of finite state automata

    Mallapragada, G., Chattopadhyay, I. & Ray, A., 2006, Proceedings of the 45th IEEE Conference on Decision and Control 2006, CDC. p. 2400-2405 6 p. 4177434

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Finite automata
    Mobile robots
    Navigation
    Robotics
    Sensors
    2 Citations (Scopus)

    Broken rotor bar detection using symbolic wavelet analysis

    Samsi, R., Mayer, J. & Ray, A., Dec 1 2006, Proceedings of the 45th IEEE Conference on Decision and Control 2006, CDC. p. 4058-4063 6 p. 4177892. (Proceedings of the IEEE Conference on Decision and Control).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Wavelet analysis
    Dynamic analysis
    Rotors
    7 Citations (Scopus)

    Correlation regimes in fluctuations of fatigue crack growth

    Scafetta, N., Ray, A. & West, B. J., Jan 1 2006, In : Physica A: Statistical Mechanics and its Applications. 359, 1-4, p. 1-23 23 p.

    Research output: Contribution to journalArticle

    Fatigue Crack Growth
    cracks
    Damage
    Fluctuations
    Time Scales

    Effects of supervisory decisions on nonlinear aircraft dynamics

    Yasar, M., Horn, J. F. & Ray, A., 2006, Proceedings of the 2006 American Control Conference. Vol. 2006. p. 4153-4158 6 p. 1657370

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Aircraft propulsion
    Propulsion
    Flight control systems
    Aircraft
    Control systems

    Generalized language measure of finite state logical systems

    Chattopadhyay, I. & Ray, A., Dec 1 2006, Proceedings - Eighth International Workshop on Discrete Event Systems, WODES 2006. p. 366-371 6 p. (Proceedings - Eighth International Workshop on Discrete Event Systems, WODES 2006).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Formal languages
    Control systems
    Chemical analysis
    6 Citations (Scopus)

    Identification of statistical patterns in complex systems via symbolic time series analysis

    Gupta, S., Khatkhate, A., Ray, A. & Keller, E., Jan 1 2006, In : ISA Transactions. 45, 4, p. 477-490 14 p.

    Research output: Contribution to journalArticle

    Automata theory
    Symbolic Analysis
    Electric power generation
    time series analysis
    Time series analysis
    4 Citations (Scopus)

    Integrated decision and control of human-engineered complex systems

    Tolani, D. K., Ray, A. & Horn, J. F., Jun 1 2006, In : International Journal of General Systems. 35, 3, p. 275-294 20 p.

    Research output: Contribution to journalArticle

    Large scale systems
    Complex Systems
    Discrete Event
    Damage
    Robust Control
    6 Citations (Scopus)

    Life extending control of mechanical systems using symbolic time series analysis

    Khatkhate, A., Gupta, S., Ray, A. & Keller, E., 2006, Proceedings of the 2006 American Control Conference. Vol. 2006. p. 3765-3770 6 p. 1657304

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Time series analysis
    Plant life extension
    Ultrasonic sensors
    Real time control
    Time series
    1 Citation (Scopus)

    On-line condition monitoring of nuclear systems via symbolic time series analysis

    Rajagopalan, V., Ray, A. & Garcia, H. E., Dec 1 2006, 5th International Topical Meeting on Nuclear Plant Instrumentation Controls, and Human Machine Interface Technology (NPIC and HMIT 2006). p. 323-330 8 p. (5th International Topical Meeting on Nuclear Plant Instrumentation Controls, and Human Machine Interface Technology (NPIC and HMIT 2006); vol. 2006).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Time series analysis
    Condition monitoring
    Pattern recognition
    Experiments
    3 Citations (Scopus)

    Pattern identification in complex systems: A statistical thermodynamic approach

    Gupta, S., Srivastav, A. & Ray, A., Nov 28 2006.

    Research output: Contribution to conferencePaper

    Statistical mechanics
    Large scale systems
    Identification (control systems)
    Information theory
    Fatigue damage
    1 Citation (Scopus)

    Renormalized measure of regular languages

    Chattopadhyay, I. & Ray, A., Dec 1 2006, Proceedings - Eighth International Workshop on Discrete Event Systems, WODES 2006. p. 45-50 6 p. 1678406. (Proceedings - Eighth International Workshop on Discrete Event Systems, WODES 2006).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Formal languages
    23 Citations (Scopus)

    Renormalized measure of regular languages

    Chattopadhyay, I. & Ray, A., Sep 1 2006, In : International Journal of Control. 79, 9, p. 1107-1117 11 p.

    Research output: Contribution to journalArticle

    Formal languages
    31 Citations (Scopus)

    Symbolic time-series analysis for anomaly detection in mechanical systems

    Khatkhate, A., Ray, A., Keller, E., Gupta, S. & Chin, S. C., Dec 1 2006, In : IEEE/ASME Transactions on Mechatronics. 11, 4, p. 439-446 8 p.

    Research output: Contribution to journalArticle

    Time series analysis
    Pattern recognition
    Automata theory
    Information theory
    Hidden Markov models
    12 Citations (Scopus)

    Symbolic time series analysis of ultrasonic signals for fatigue damage monitoring in polycrystalline alloys

    Gupta, S., Ray, A. & Keller, E., Jul 1 2006, In : Measurement Science and Technology. 17, 7, p. 1963-1973 11 p., 040.

    Research output: Contribution to journalArticle

    Symbolic Analysis
    time series analysis
    Fatigue Damage
    Time series analysis
    Time Series Analysis