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Journal Articles

2018

  1. Zhuang Y., Kopsaftopoulos† F., Dugnani R., Chang F.-K.,. "Integrity monitoring of adhesively bonded joints via an electromechanical impedance-based approach," 1.Zhuang Y, Kopsaftopoulos F, Dugnani R, Chang F-K. Integrity monitoring of adhesively bonded joints via an electromechanical impedance-based approach. Structural Health Monitoring. 2017;17(5):1031-1045. doi:10.1177/1475921717732331 [Publication, Abstract]
  2. Chen X., Kopsaftopoulos F.P., Wu Q., Ren H., Chang F.-K.. "Flight State Identification of a Self-Sensing Wing via an Improved Feature Selection Method and Machine Learning Approaches," Invited paper in the Special Issue “Selected Papers from IWSHM 2017”, Sensors, Vol. 18(5), pp. 1379, 2018. [Publication, Abstract]
  3. Ladpli P., Kopsaftopoulos F.P., Chang F.-K.. "Estimating State of Charge and Health of Lithium-ion Batteries with Guided Waves Using Built-in Piezoelectric Sensors/Actuators," Journal of Power Sources, Vol. 384, pp. 342-354, 2018. [Publication, Abstract]
  4. Zhuang Y., Kopsaftopoulos F.P., Dugnani R., Chang F.-K.. "A self-diagnostic adhesive for bondline integrity monitoring of aerospace structures," invited paper, Structural Health Monitoring, in press. [Publication, Abstract]
  5. Kopsaftopoulos F.P., Nardari R., Li Y.-H., Chang F.-K.. "A stochastic global identification for aerospace structures operating under varying flight states," Mechanical Systems and Signal Processing, Vol. 98, pp. 425–447, 2018. [Publication, Abstract]

2021

  1. Dutta A., McKay M., Kopsaftopoulos F., Gandhi F.,. "Fault detection and identification for multicopter by data-driven and statistical learning methods," [Publication, Abstract]
  2. Yadav S.K., Mishra S., Kopsaftopoulos F.P., Chang F.-K.. "Reliability of crack quantification via acousto-ultrasound active-sensing structural health monitoring using surface-mounted PZT actuators/sensors," Structural Health Monitoring, Vol. 20(1), pp. 219-239, 2021. [Publication, Abstract]
  3. Amer A., Kopsaftopoulos F.P.. "Gaussian Process Regression for Active Sensing Probabilistic Structural Health Monitoring: Experimental Assessment Across Multiple Damage and Loading Scenarios," arXiv:2106.14841, 2021. [Publication, Abstract]
  4. Lois A., Kopsaftopoulos F.P., Giannopoulos D., Polychronopoulou K., Martakis N.. "A two-stage procedure for the automated identification of micro-earthquakes: implementation on single-station 3C passive seismic data," Geophysical Journal International, Vol. 224(3), pp. 1705-1723, 2021. [Publication, Abstract]
  5. Dutta A., McKay M., Kopsaftopoulos F.P., Gandhi F.. "Statistical residual-based time series methods for multicopter fault detection and identification," Aerospace Science and Technology, Vol. 112: 106649, 2021. [Publication, Abstract]
  6. Amer A., Kopsaftopoulos F.P.. "Statistical guided-waves-based structural health monitoring via stochastic non-parametric time series models," Structural Health Monitoring, Vol. 0(0), pp. 1-28, 2021 [Publication, Abstract]
  7. Ahmed S., Kopsaftopoulos F.P.. "Stochastic Identification of Guided Wave Propagation under Ambient Temperature via Non-Stationary Time Series Models," Sensors, Vol. 21(16), p. 5672, 2021. [Publication, Abstract]
  8. Dutta A., McKay ME., Kopsaftopoulos F.P., Gandhi F.. "Multicopter Fault Detection and Identification via Data-Driven Statistical Learning Methods," AIAA Journal, Vol. 60(1), pp. 160-175, 2022. [Publication, Abstract]

2023

  1. Cheng L., Huh T., Nasrollahi A., Chen S., Lu L., Kopsaftopoulos F., Cutkosky M., Chang F.-K.,. "Design of active sensing smart skin for incipient slip detection in robotics applications," C. Liu et al., "Design of Active Sensing Smart Skin for Incipient Slip Detection in Robotics Applications," in IEEE/ASME Transactions on Mechatronics, vol. 28, no. 3, pp. 1766-1777, June 2023, doi: 10.1109/TMECH.2022.3224119.keywords: {Robot sensing systems;Sensors;Robots;Area measurement;Force;Skin;Vibrations;Active sensing;guided wave;incipient slip detection;piezoelectric transducer;smart skin;tactile sensing},  [Publication, Abstract]
  2. Paul S., Cruz-Camacho E., Dutta A., Bhaumik A., Blasch E., Agha G., Patterson S., Kopsaftopoulos F., Varela C.,. "Formal verification of safety-critical aerospace systems," S. Paul et al., "Formal Verification of Safety-Critical Aerospace Systems," in IEEE Aerospace and Electronic Systems Magazine, vol. 38, no. 5, pp. 72-88, 1 May 2023, doi: 10.1109/MAES.2023.3238378. keywords: {Aircraft;Aerospace safety;Aerospace electronics;Software;Runtime;Cognition;Aerospace and electronic systems;Autonomous aerial vehicles;theorem proving;runtime verification;stochastic systems;distributed systems}, [Publication, Abstract]
  3. Dutta† A., Niemiec R., Kopsaftopoulos F., Gandhi F.,. "Machine-Learning Based Rotor Fault Diagnosis in a Multicopter with Strain Data," [Publication, Abstract]
  4. Chen A., Mishra S., and Kopsaftopoulos F.,. "An unsupervised online anomaly detection method for metal additive manufacturing processes via a statistical time-frequency domain algorithm," 1.Chen A, Kopsaftopoulos F, Mishra S. An unsupervised online anomaly detection method for metal additive manufacturing processes via a statistical time-frequency domain algorithm. Structural Health Monitoring. 2023;23(3):1926-1948. doi:10.1177/14759217231193702 [Publication, Abstract]
  5. Ahmed S. and Kopsaftopoulos F.,. "Active-sensing ultrasonic guided waves-based damage diagnosis via stochastic stationary time series models," 1.Ahmed S, Kopsaftopoulos F. Active sensing ultrasonic guided wave-based damage diagnosis via stochastic stationary time-series models. Structural Health Monitoring. 2023;23(4):2559-2595. doi:10.1177/14759217231201975 [Publication, Abstract]
  6. Amer A., Roy S., and Kopsaftopoulos F.,. "Physics-supported GP surrogates: towards physics-informed probabilistic structural health monitoring," Amer, Ahmad and Roy, Surajit and Kopsaftopoulos, Fotis, Physics-Supported Gp Surrogates: Towards Physics-Informed Probabilistic Structural Health Monitoring. Available at SSRN: https://ssrn.com/abstract=4455968 or http://dx.doi.org/10.2139/ssrn.4455968 [Publication, Abstract]

2022

  1. Cruz-Camacho E., Amer A., Varela C., Kopsaftopoulos F. "Formal safety envelopes for provably accurate state classification by data-driven flight models," Formal Safety Envelopes for Provably Accurate State Classification by Data-Driven Flight ModelsElkin Cruz-Camacho, Ahmad Amer, Fotis Kopsaftopoulos, and Carlos A. VarelaJournal of Aerospace Information Systems 2023 20:1, 3-16 [Publication, Abstract]
  2. Amer A., Kopsaftopoulos F.P.. "Statistical guided-waves-based structural health monitoring via stochastic non-parametric time series models," Structural Health Monitoring, Vol. 21(3), pp. 1139-1166, 2022 [Publication, Abstract]
  3. Dutta A., McKay ME., Kopsaftopoulos F.P., Gandhi F.. "Multicopter Fault Detection and Identification via Data-Driven Statistical Learning Methods," AIAA Journal, Vol. 60 (1), pp. 160-175, 2022. [Publication, Abstract]
  4. Ahmed S., Kopsaftopoulos F.P.. "Time-varying Identification of Guided Wave Propagation under Varying Temperature via Non-Stationary Time Series Models," arXiv preprint arXiv:2201.04721, 2022 [Publication, Abstract]
  5. Ahmed S., Kopsaftopoulos F.P.. "Stochastic Identification-based Active Sensing Acousto-Ultrasound SHM Using Stationary Time Series Models," arXiv preprint arXiv:2201.11233, 2022 [Publication, Abstract]

2024

  1. Amer A., Ahmed S., and Kopsaftopoulos F.,. "Probabilistic state quantification under varying loading states via the integration of time-varying autoregressive and Gaussian process models," Amer A, Ahmed S, Kopsaftopoulos F. Probabilistic State Estimation Under Varying Loading States via the Integration of Time-Varying Autoregressive and Gaussian Process Models. Structural Health Monitoring. 2024;23(6):3545-3580. doi:10.1177/14759217231220548 [Publication, Abstract]
  2. Fan Y. and Kopsaftopoulos† F.. "Data-driven framework for forward and inverse problems in guided waves-based structural health monitoring under varying environmental and operating conditions," https://arxiv.org/abs/2410.01127 [Publication, Abstract]

2025

  1. Ahmed S. and Kopsaftopoulos F.. "functional series time-dependent framework for non-stationary modeling and statistical damage diagnosis via ultrasonic guided waves," Ahmed S, Kopsaftopoulos F. A functional series time-dependent framework for non-stationary modeling and statistical damage diagnosis via ultrasonic guided waves. Structural Health Monitoring. 2025;0(0). doi:10.1177/14759217251369342 [Publication, Abstract]
  2. Chen A., Mishra S., and Kopsaftopoulos F.. "Online fault detection in metal additive manufacturing via statistical time series methods," accepted [Abstract]
  3. Dutta A., McKay M., Kopsaftopoulos F., Gandhi F.. "Rotor failure detection and identification on a hexacopter under varying flight states based on global stochastic models," [Abstract]
  4. Zhou P. and Kopsaftopoulos F.. "Bayesian structural state estimation via regularized stochastic time series models," [Abstract]
  5. Zhou P. and Kopsaftopoulos F.. "Data-driven structural damage diagnosis and reliability assessment: Leveraging the Cramér-Rao lower bound of stochastic functional time series representations," [Abstract]
  6. Fan Y. and Kopsaftopoulos F.. "Data-Driven Structural State Estimation via Multi-Fidelity Gaussian Process Models,," https://arxiv.org/abs/2505.01666 [Publication, Abstract]
  7. Fan Y., Giovanis D. and Kopsaftopoulos F.. "Guided Wave-Based Structural Awareness Under Varying Operating States via Manifold Representations," https://arxiv.org/abs/2504.11235 [Publication, Abstract]

2019

  1. Chen X., Kopsaftopoulos F.P., Wu Q., Ren H., Chang F.-K.. "A self-adaptive 1D convolutional neural network for flight-state identification," Sensors, Vol. 19(2), pp. 275, 2019. [Publication, Abstract]
  2. Ladpli P., Nardari R., Kopsaftopoulos F.P., Chang F.-K.. "Multifunctional Energy Storage Composite Structures with Embedded Lithium-ion Batteries," Journal of Power Sources, Vol. 414, pp. 517-529, 2019. [Publication, Abstract]

2017

  1. Salowitz N., Kim S.-J., Kopsaftopoulos F.P., Li Y.-H., Chang F.-K.. "Design and analysis of radially polarized screen-printed piezoelectric transducers," Journal of Intelligent Material Systems and Structures, Vol. 28(7), pp. 934–947, 2017. [Publication, Abstract]

2016

  1. Dugnani R., Zhuang Y., Kopsaftopoulos F.P., Chang F.-K.. "Adhesive bondline degradation detection via a cross-correlation EMI-based approach," Structural Health Monitoring, Vol. 15(6), pp. 650–667, 2016. [Publication, Abstract]
  2. Janapati V., Kopsaftopoulos F.P.⇤, Li F., Lee S.J., Chang F.-K.. "Damage detection sensitivity characterization of acousto-ultrasound-based SHM techniques," Structural Health Monitoring, Vol. 15(2), pp. 143–161, 2016. [Publication, Abstract]
  3. Sotiriou D., Kopsaftopoulos F.P.⇤ and Fassois S.D.. "An adaptive time series probabilistic framework for 4D trajectory conformance monitoring," IEEE Transactions on Intelligent Transportation Systems, Vol. 17(6), pp. 1606–1616, 2016. [Publication, Abstract]

2015

  1. Kopsaftopoulos F.P. and Fassois S.D.. "A vibration model residual based sequential probability ratio test framework for structural health monitoring," Structural Health Monitoring, Vol. 14(4), pp. 359–381, 2015. [Publication, Abstract]
  2. Dimogianopoulos D., Petratos V., Kopsaftopoulos F.P., and Fassois S.D.. "A GPCbased auto-throttle with robust fuel-efficient operation in 4D flights," Aerospace Science and Technology, Vol. 40, pp. 128–137, 2015. [Publication, Abstract]

2014

  1. Salowitz N., Guo Z., Roy S., Nardari R., Li Y.-H., Kim S.-J., Kopsaftopoulos F.P., Chang F.-K.. "Recent advancements and vision toward stretchable bio-inspired networks for intelligent structures," Structural Health Monitoring, Vol. 13(6), pp. 609–620, 2014. [Publication, Abstract]

2013

  1. Kopsaftopoulos F.P. and Fassois S.D.. "A functional model based statistical time series method for vibration based damage detection, localization, and magnitude estimation," Mechanical Systems and Signal Processing, Vol. 39(1–2), pp. 143–161, 2013. [Publication, Abstract]

2011

  1. Kopsaftopoulos F.P. and Fassois S.D.. "Scalar and vector time series methods for vibration based damage diagnosis in a scale aircraft skeleton structure," invited paper to Journal of Theoretical and Applied Mechanics, Vol. 49(3), pp. 727–756, 2011. [Publication, Abstract]

2010

  1. Kopsaftopoulos F.P. and Fassois S.D.. "Vibration based health monitoring for a lightweight truss structure: experimental assessment of several statistical time series methods," Mechanical Systems and Signal Processing, Vol. 24(7), pp. 1977–1997, 2010. [Publication, Abstract]

2007

  1. Kopsaftopoulos F.P. and Fassois S.D.. "Vibration based structural damage detection and precise assessment via stochastic functionally pooled models," Key Engineering Materials, Vol. 347, pp. 127–132, 2007. [Publication, Abstract]