Chrystal Chern

Postdoctoral Fellow, UC Berkeley STAIRlab, Dynamics Lab, and Discovery.

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Student Center

University of California

Berkeley, CA 94720

I am a dynamics researcher working at the intersection of mechanical systems, sensing, and scientific computing. My research centers on system identification: extracting models of physical systems from measured data, understanding when those models can and cannot be trusted, and using them to detect anomalies in physical behavior. In my doctoral work at UC Berkeley, I developed a digital twin framework for monitoring the health of civil infrastructure from vibration data, now deployed in a web-based monitoring platform used by the California Department of Transportation. As a postdoctoral researcher in the Dynamics Lab and STAIRLab at Berkeley, I have extended this work to new sensing and modeling problems, including identifying the causal structure of coupled human-object motion from multi-node IMU sensor networks, resolving ambiguity in the modal analysis of damped mechanical systems, and building open-source Python tools for system identification at scale. Before graduate school, I practiced as a building enclosure engineer at Simpson Gumpertz & Heger, where I performed standards-based acceptance testing, non-destructive evaluation, and failure diagnosis of installed building assemblies.

I am also committed to making research a transformative experience for students. As Program Strategist at Berkeley Discovery, I design and assess tiered mentorship programs that give students ownership over creation and innovation, and that work shapes how I supervise and mentor researchers in my own lab.

selected publications

  1. ASME JAM
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    On Complex Modal Inverse Analysis: The Cautionary Tale of the Single Surviving Mode
    Chrystal Chern and Oliver M. O’Reilly
    ASME Journal of Applied Mechanics (in press, 2026), 2026
  2. Nonlin. Dyn.
    The Symphony of Gyrations Producing Steady Motions of a Hula Hoop: Insights from a Network Analysis
    Chrystal Chern, Theresa E. Honein, and Oliver M. O’Reilly
    Nonlinear Dynamics (submitted May 2026), 2026
  3. JBE
    Human-Machine Collaboration Framework for Bridge Health Monitoring
    Sifat Muin, Chrystal Chern, and Khalid M. Mosalam
    Journal of Bridge Engineering, 2024
  4. EVACES
    Structural Response Prediction from Learned System Realization Matrices
    Chrystal Chern, Claudio Perez, and Khalid M. Mosalam
    In 11th International Conference on Experimental Vibration Analysis of Civil Engineering Structures (EVACES), 2025
  5. Software
    mdof: 0.0.16-alpha
    Chrystal Chern, Claudio Perez, and Khalid M. Mosalam
    2024