Asok Ray

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

    2004
    305 Citations (Scopus)

    Symbolic dynamic analysis of complex systems for anomaly detection

    Ray, A., Jul 1 2004, In : Signal Processing. 84, 7, p. 1115-1130 16 p.

    Research output: Contribution to journalArticle

    Dynamic analysis
    Large scale systems
    Dynamical systems
    Finite automata
    Pattern recognition
    22 Citations (Scopus)

    Unconstrained optimal control of regular languages

    Fu, J., Ray, A. & Lagoa, C. M., Apr 1 2004, In : Automatica. 40, 4, p. 639-646 8 p.

    Research output: Contribution to journalArticle

    Formal languages
    Finite automata
    Linear equations
    Computational complexity
    Polynomials
    2003
    3 Citations (Scopus)

    A behavior-based collaborative multi-agent system

    Wang, X., Ray, A., Lee, P. & Phoha, S., Nov 24 2003, In : Proceedings of the IEEE International Conference on Systems, Man and Cybernetics. 5, p. 4242-4248 7 p.

    Research output: Contribution to journalConference article

    Multi agent systems
    Control systems
    Control theory
    Mobile robots
    Scalability
    7 Citations (Scopus)

    A Language Measure for Supervisory Control

    Ray, A., Surana, A. & Phoha, S., Oct 2003, In : Applied Mathematics Letters. 16, 7, p. 985-991 7 p.

    Research output: Contribution to journalArticle

    Supervisory Control
    Formal languages
    Automata theory
    Regular Languages
    Supervisory personnel

    A new concept for early detection of BWR instabilities

    Delfino, C., Ray, A., Ivanov, K. N. & Cheung, F. B., Jan 1 2003, In : Transactions of the American Nuclear Society. 88, 1 p.

    Research output: Contribution to journalConference article

    4 Citations (Scopus)

    Anomaly detection in complex systems

    Surana, A., Ray, A. & Chin, S., Jan 1 2003, In : IFAC Proceedings Volumes (IFAC-PapersOnline). 36, 5, p. 1119-1124 6 p.

    Research output: Contribution to journalConference article

    Large scale systems
    Dynamical systems
    3 Citations (Scopus)

    Anomaly Prediction in Mechanical Systems Using Symbolic Dynamics

    Friedlander, D., Chattopadhyay, I., Ray, A., Phoha, S. & Jacobson, N., Nov 7 2003, In : Proceedings of the American Control Conference. 5, p. 4275-4280 6 p.

    Research output: Contribution to journalConference article

    System theory
    Testbeds
    Nonlinear systems
    Time series
    6 Citations (Scopus)

    Calibration and estimation of redundant signals for real-time monitoring and control

    Ray, A. & Phoha, S., Dec 1 2003, In : Signal Processing. 83, 12, p. 2593-2605 13 p.

    Research output: Contribution to journalArticle

    Calibration
    Monitoring
    Sensors
    Power plants
    Transport aircraft
    1 Citation (Scopus)

    Control of Communication Networks for Multiple Mobile Platforms

    Metzner, J. J., Chin, S. & Ray, A., Nov 6 2003, In : Proceedings of the American Control Conference. 1, p. 242-247 6 p.

    Research output: Contribution to journalConference article

    Fault tolerance
    Telecommunication networks
    Decoding
    Feedback
    Communication
    6 Citations (Scopus)

    J-DES: A Graphical Interactive Package for Analysis and Synthesis of Discrete Event Systems

    Wang, X., Ray, A., Phoha, S. & Liu, J., Nov 6 2003, In : Proceedings of the American Control Conference. 4, p. 3405-3410 6 p.

    Research output: Contribution to journalConference article

    Discrete event simulation
    Finite automata
    Software packages
    Control systems
    11 Citations (Scopus)

    On-line Identification of Language Measure Parameters for Discrete Event Supervisory Control

    Wang, X., Ray, A. & Khatkhate, A. M., Dec 1 2003, Proceedings of the IEEE Conference on Decision and Control. p. 6307-6312 6 p. (Proceedings of the IEEE Conference on Decision and Control; vol. 6).

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

    Supervisory Control
    Discrete Event
    Identification (control systems)
    Parameter Identification
    Formal languages
    17 Citations (Scopus)

    Optimal Control of Regular Languages with Event Disabling Cost

    Fu, J., Ray, A. & Lagoa, C. M., Nov 7 2003, In : Proceedings of the American Control Conference. 2, p. 1691-1695 5 p.

    Research output: Contribution to journalConference article

    Formal languages
    Costs
    Computational complexity
    Polynomials
    6 Citations (Scopus)

    Output feedback linear parameter varying (LPV) L2-gain control

    Hong, B. S., Ray, A. & Yang, V., Sep 1 2003, In : Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME. 125, 3, p. 485-489 5 p.

    Research output: Contribution to journalArticle

    Gain control
    Feedback
    output
    Feedback control
    Experiments
    27 Citations (Scopus)

    Real-time health monitoring of mechanical structures

    Keller, E. & Ray, A., Jan 1 2003, In : Structural Health Monitoring. 2, 3, p. 191-203 13 p.

    Research output: Contribution to journalArticle

    Fatigue
    Health
    Ultrasonic sensors
    Monitoring
    Fatigue damage
    4 Citations (Scopus)

    Reliable operation of rotorcraft using probabilistic robust control

    Horn, J. F., Tolani, D. K., Lagoa, C. M., Wang, Q. & Ray, A., Jan 1 2003, In : IFAC Proceedings Volumes (IFAC-PapersOnline). 36, 5, p. 179-184 6 p.

    Research output: Contribution to journalConference article

    Robust control
    Controllers
    Control systems
    Switches
    9 Citations (Scopus)

    Robust Optimal Control of Regular Languages

    Fu, J., Lagoa, C. M. & Ray, A., Dec 1 2003, In : Proceedings of the IEEE Conference on Decision and Control. 4, p. 3209-3214 6 p.

    Research output: Contribution to journalConference article

    Formal languages
    Regular Languages
    Robust Control
    Optimal Control
    Optimal Policy
    4 Citations (Scopus)

    Signed Real Measure of Regular Languages

    Surana, A. & Ray, A., Dec 1 2003, Proceedings of the IEEE Conference on Decision and Control. p. 3233-3238 6 p. (Proceedings of the IEEE Conference on Decision and Control; vol. 4).

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

    Formal languages
    Supervisory personnel
    Finite automata
    25 Citations (Scopus)

    Signed real measure of regular languages for discrete-event automata

    Ray, A. & Phoha, S., Dec 15 2003, In : International Journal of Control. 76, 18, p. 1800-1808 9 p.

    Research output: Contribution to journalArticle

    Formal languages
    Supervisory personnel
    Finite automata
    Control systems
    1 Citation (Scopus)

    Software Performance Analysis Using a Language Measure

    Hong, Y., Trivedi, K. S., Ray, A. & Phoha, S., Nov 6 2003, In : Proceedings of the American Control Conference. 3, p. 2258-2263 6 p.

    Research output: Contribution to journalConference article

    Markov processes
    Formal languages
    Finite automata

    Supervisory control of malicious executables

    Phoha, V. V., Xu, X., Ray, A. & Phoha, S., Jan 1 2003, In : IFAC Proceedings Volumes (IFAC-PapersOnline). 36, 5, p. 1065-1070 6 p.

    Research output: Contribution to journalConference article

    Viruses
    Controllers
    Formal languages
    Experiments
    2 Citations (Scopus)

    Supervisory Control of Software Systems for Fault Mitigation

    Phoha, V. V., Nadgar, A., Ray, A., Fu, J. & Phoha, S., Nov 6 2003, In : Proceedings of the American Control Conference. 3, p. 2229-2233 5 p.

    Research output: Contribution to journalConference article

    Application programs
    Computer operating systems
    Supervisory personnel
    Finite automata
    Program processors

    Validation of a Language Measure for Discrete Event Supervisory Control

    Ortogero, T., Ray, A. & Phoha, S., Nov 7 2003, In : Proceedings of the American Control Conference. 2, p. 1679-1684 6 p.

    Research output: Contribution to journalConference article

    Formal languages
    Supervisory personnel
    Finite automata
    Robustness (control systems)
    Experiments
    2002
    9 Citations (Scopus)

    A language measure for discrete-event automata

    Ray, A. & Phoha, S., Jan 1 2002, In : IFAC Proceedings Volumes (IFAC-PapersOnline). 15, 1, p. 181-186 6 p.

    Research output: Contribution to journalConference article

    Formal languages
    Supervisory personnel
    Finite automata
    Vector spaces
    Control systems
    2 Citations (Scopus)

    Calibration and estimation of redundant signals

    Ray, A. & Phoha, S., Jan 1 2002, In : Proceedings of the American Control Conference. 2, p. 1437-1442 6 p.

    Research output: Contribution to journalConference article

    Calibration
    Adaptive filters
    Covariance matrix
    Dynamical systems
    Control systems
    4 Citations (Scopus)

    Detection and identification of potential faults via multi-level hypotheses testing

    Ray, A. & Phoha, S., Jun 1 2002, In : Signal Processing. 82, 6, p. 853-859 7 p.

    Research output: Contribution to journalArticle

    Condition monitoring
    Testing
    Spacecraft
    Power plants
    Dynamical systems
    1 Citation (Scopus)

    Fault detection and identification via multi-level hypotheses testing

    Ray, A. & Phoha, S., Jan 1 2002, In : IFAC Proceedings Volumes (IFAC-PapersOnline). 15, 1, p. 413-418 6 p.

    Research output: Contribution to journalConference article

    Fault detection
    Testing
    Temperature sensors
    Power plants
    Sensors

    Load scheduling and health management of electric power generation systems

    Fu, J., Ray, A. & Spare, J. H., Jan 1 2002, Proceedings of the American Control Conference. Vol. 6. p. 4849-4854 6 p.

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Electric power generation
    Fossil fuel power plants
    Scheduling
    Health
    Deregulation
    27 Citations (Scopus)

    Signed real measure of regular languages

    Wang, X. & Ray, A., Jan 1 2002, In : Proceedings of the American Control Conference. 5, p. 3937-3942 6 p.

    Research output: Contribution to journalConference article

    Formal languages
    Automata theory
    Supervisory personnel
    Finite automata
    Computational complexity
    12 Citations (Scopus)

    Unconstrained optimal control of regular languages

    Fu, J., Ray, A. & Lagoa, C. M., Dec 1 2002, In : Proceedings of the IEEE Conference on Decision and Control. 1, p. 799-804 6 p.

    Research output: Contribution to journalConference article

    Formal languages
    Regular Languages
    Optimal Policy
    Finite State Automata
    Optimal Control
    26 Citations (Scopus)

    Wide-range robust control of combustion instability

    Hong, B. S., Ray, A. & Yang, V., Jan 1 2002, In : Combustion and Flame. 128, 3, p. 242-258 17 p.

    Research output: Contribution to journalArticle

    trajectory control
    combustion stability
    Robust control
    Fuel injection
    fuel injection
    2001

    Adaptive filtering for calibration of redundant signals

    Ray, A. & Phoha, S., Dec 1 2001, In : AUTOTESTCON (Proceedings). p. 121-136 16 p.

    Research output: Contribution to journalConference article

    Adaptive filtering
    Calibration
    Power plants
    Transport aircraft
    Adaptive filters
    13 Citations (Scopus)

    Damage-mitigating control of aircraft for enhanced structural durability

    Caplin, J., Ray, A. & Joshi, S. M., Jul 1 2001, In : IEEE Transactions on Aerospace and Electronic Systems. 37, 3, p. 849-862 14 p.

    Research output: Contribution to journalArticle

    Durability
    Aircraft
    Flight dynamics
    Controllers
    Fatigue crack propagation

    Detection and identification of emerging faults via hypotheses testing

    Ray, A. & Phoha, S., Dec 1 2001, In : Proceedings of the IEEE Conference on Decision and Control. 3, p. 2295-2296 2 p.

    Research output: Contribution to journalConference article

    Hypothesis Testing
    Fault
    Testing
    Early Warning
    Real-time
    69 Citations (Scopus)

    Fatigue crack growth under variable-amplitude loading: Part II - Code development and model validation

    Ray, A. & Patankar, R., Nov 1 2001, In : Applied Mathematical Modelling. 25, 11, p. 995-1013 19 p.

    Research output: Contribution to journalArticle

    Fatigue Crack Growth
    Model Validation
    State-space Model
    Fatigue crack propagation
    Crack Closure
    68 Citations (Scopus)

    Fatigue crack growth under variable-amplitude loading: Part I - Model formulation in state-space setting

    Ray, A. & Patankar, R., Nov 1 2001, In : Applied Mathematical Modelling. 25, 11, p. 979-994 16 p.

    Research output: Contribution to journalArticle

    Fatigue Crack Growth
    Fatigue crack propagation
    State Space
    Overload
    Formulation
    12 Citations (Scopus)

    Fuzzy damage-mitigating control of a fossil power plant

    Holmes, M. & Ray, A., Jan 1 2001, In : IEEE Transactions on Control Systems Technology. 9, 1, p. 140-147 8 p.

    Research output: Contribution to journalArticle

    Power plants
    Durability
    Control systems
    Controllers
    Maintainability
    1 Citation (Scopus)

    Life extending controller design for reusable rocket engines

    Ray, A., Holmes, M. S. & Lorenzo, C. F., Jun 2001, In : Aeronautical Journal. 105, 1048, p. 315-322 8 p.

    Research output: Contribution to journalArticle

    Reusable rockets
    Rocket engines
    Controllers
    Space shuttles
    Robust control
    5 Citations (Scopus)

    Life extending control of large-scale dynamical systems

    Ray, A., Jan 1 2001, In : Proceedings of the American Control Conference. 5, p. 3692-3701 10 p.

    Research output: Contribution to journalConference article

    Dynamical systems
    Fuzzy logic
    Reusable rockets
    Control systems
    Controllers
    6 Citations (Scopus)

    Nonlinear control of a reusable rocket engine for life extension

    Lorenzo, C. F., Ray, A. & Holmes, M. S., Jan 1 2001, In : Journal of Propulsion and Power. 17, 5, p. 998-1004 7 p.

    Research output: Contribution to journalArticle

    reusable rocket engines
    Reusable rockets
    Plant life extension
    Rocket engines
    controllers
    5 Citations (Scopus)

    Observer-embedded L2-gain control

    Hong, B. S. & Ray, A., Jul 1 2001, In : Applied Mathematics Letters. 14, 5, p. 563-569 7 p.

    Research output: Contribution to journalArticle

    Gain control
    Observer
    Controllers
    Controller
    Hamiltonians
    1 Citation (Scopus)

    Online monitoring of fatigue crack damage for life extending control of aircraft structures

    Sastry, V. V. S. & Ray, A., Jan 1 2001, In : Proceedings of the American Control Conference. 3, p. 2363-2364 2 p.

    Research output: Contribution to journalArticle

    Aircraft
    Controllers
    Monitoring
    Structural loads
    Cyclic loads
    5 Citations (Scopus)

    Real-time nondestructive evaluation of airframe structures for health monitoring and residual life prediction

    Keller, E. & Ray, A., Jan 1 2001.

    Research output: Contribution to conferencePaper

    Airframes
    Ultrasonics
    Health
    Defects
    Monitoring
    2000

    An adaptive filter for calibration and estimation of redundant signals

    Ray, A. & Phoha, S., Dec 1 2000, In : Proceedings of the IEEE Conference on Decision and Control. 5, p. 4928-4933 6 p.

    Research output: Contribution to journalConference article

    Adaptive Filter
    Adaptive filters
    Calibration
    Transport aircraft
    Covariance matrix
    5 Citations (Scopus)

    Calibration and estimation of redundant signals

    Ray, A. & Phoha, S., Oct 2000, In : Automatica. 36, 10, p. 1525-1534 10 p.

    Research output: Contribution to journalArticle

    Power plants
    Calibration
    Transport aircraft
    Adaptive filters
    Covariance matrix
    5 Citations (Scopus)

    Damage-mitigating control with overload injection: Experimental validation of the concept

    Zhang, H., Ray, A. & Patankar, R., Jan 1 2000, In : Journal of Dynamic Systems, Measurement and Control, Transactions of the ASME. 122, 2, p. 336-342 7 p.

    Research output: Contribution to journalArticle

    injection
    Robust control
    damage
    Feedback control
    Durability
    26 Citations (Scopus)

    Fuzzy wide-range control of fossil power plants for life extension and robust performance

    Kallappa, P. & Ray, A., Jan 2000, In : Automatica. 36, 1, p. 69-82 14 p.

    Research output: Contribution to journalArticle

    Plant life extension
    Power plants
    Controllers
    Durability
    Fuzzy logic
    18 Citations (Scopus)

    Hybrid life-extending control of mechanical systems: Experimental validation of the concept

    Zhang, H., Ray, A. & Phoha, S., Jan 2000, In : Automatica. 36, 1, p. 23-36 14 p.

    Research output: Contribution to journalArticle

    Controllers
    Energy conversion
    Service life
    Spacecraft
    Dynamical systems
    7 Citations (Scopus)

    Life extending control of aircraft: trade-off between flight performance and structural durability

    Ray, A. & Caplin, J., Sep 2000, Aeronautical Journal, 104, 1039, p. 397-408 12 p.

    Research output: Contribution to specialist publicationArticle

    Flight dynamics
    Durability
    Aircraft
    Service life
    Controllers
    6 Citations (Scopus)

    Nonlinear life-extending control of a rocket engine

    Lorenzo, C. F., Holmes, M. S. & Ray, A., Jan 1 2000, In : Journal of Guidance, Control, and Dynamics. 23, 4, p. 759-762 4 p.

    Research output: Contribution to journalArticle

    Reusable rockets
    rocket engines
    Rocket engines
    Transient analysis
    thrust chamber pressure
    3 Citations (Scopus)

    Parameter-dependent L2-gain control synthesis

    Hong, B. S., Ray, A. & Yang, V., 2000, In : Proceedings of the American Control Conference. 5, p. 3697-3701 5 p.

    Research output: Contribution to journalArticle

    Gain control
    Game theory
    Feedback control
    Scheduling
    Control systems