Professional Education


  • Doctor of Philosophy, Massachusetts Institute of Technology, Mechanical Engineering (2012)
  • Master of Science, Massachusetts Institute of Technology, Mechanical Engineering (2007)
  • Bachelor of Science, Pennsylvania State University, Engineering Science (2005)

Stanford Advisors


Journal Articles


  • Update on quadruple suspension design for Advanced LIGO CLASSICAL AND QUANTUM GRAVITY Aston, S. M., Barton, M. A., Bell, A. S., Beveridge, N., Bland, B., Brummitt, A. J., Cagnoli, G., Cantley, C. A., Carbone, L., Cumming, A. V., Cunningham, L., CUTLER, R. M., Greenhalgh, R. J., Hammond, G. D., Haughian, K., Hayler, T. M., Heptonstall, A., Heefner, J., Hoyland, D., Hough, J., Jones, R., Kissel, J. S., Kumar, R., Lockerbie, N. A., Lodhia, D., MARTIN, I. W., Murray, P. G., O'Dell, J., Plissi, M. V., Reid, S., Romie, J., Robertson, N. A., Rowan, S., SHAPIRO, B., Speake, C. C., Strain, K. A., Tokmakov, K. V., Torrie, C., van Veggel, A. A., Vecchio, A., Wilmut, I. 2012; 29 (23)
  • Damping and local control of mirror suspensions for laser interferometric gravitational wave detectors REVIEW OF SCIENTIFIC INSTRUMENTS Strain, K. A., Shapiro, B. N. 2012; 83 (4)

    Abstract

    The mirrors of laser interferometric gravitational wave detectors hang from multi-stage suspensions. These support the optics against gravity while isolating them from external vibration. Thermal noise must be kept small so mechanical loss must be minimized and the resulting structure has high-Q resonances rigid-body modes, typically in the frequency range between about 0.3 Hz and 20 Hz. Operation of the interferometer requires these resonances to be damped. Active damping provides the design flexibility required to achieve rapid settling with low noise. In practice there is a compromise between sensor performance, and hence cost and complexity, and sophistication of the control algorithm. We introduce a novel approach which combines the new technique of modal damping with methods developed from those applied in GEO 600. This approach is predicted to meet the goals for damping and for noise performance set by the Advanced LIGO project.

    View details for DOI 10.1063/1.4704459

    View details for Web of Science ID 000303415300050

    View details for PubMedID 22559557

  • Design and development of the advanced LIGO monolithic fused silica suspension CLASSICAL AND QUANTUM GRAVITY Cumming, A. V., Bell, A. S., Barsotti, L., Barton, M. A., Cagnoli, G., Cook, D., Cunningham, L., Evans, M., Hammond, G. D., Harry, G. M., Heptonstall, A., Hough, J., Jones, R., Kumar, R., Mittleman, R., Robertson, N. A., Rowan, S., SHAPIRO, B., Strain, K. A., Tokmakov, K., Torrie, C., van Veggel, A. A. 2012; 29 (3)
  • Modal Damping of a Quadruple Pendulum for Advanced Gravitational Wave Detectors 2012 AMERICAN CONTROL CONFERENCE (ACC) Shapiro, B., Mavalvala, N., Youcef-Toumi, K. 2012: 1017-1022
  • First results from the 'Violin-Mode' tests on an advanced LIGO suspension at MIT CLASSICAL AND QUANTUM GRAVITY Lockerbie, N. A., Carbone, L., SHAPIRO, B., Tokmakov, K. V., Bell, A., Strain, K. A. 2011; 28 (24)
  • Damping parametric instabilities in future gravitational wave detectors by means of electrostatic actuators PHYSICS LETTERS A Miller, J., Evans, M., Barsotti, L., Fritschel, P., MacInnis, M., Mittleman, R., Shapiro, B., Soto, J., Torrie, C. 2011; 375 (3): 788-794
  • Actuator Sizing of a Quadruple Pendulum for Advanced Gravitational Wave Detectors 2011 AMERICAN CONTROL CONFERENCE Shapiro, B., Mavalvala, N., Youcef-Toumi, K. 2011: 1358-1363

Presentations


  • Modal Damping of a Quad Pendulum for Advanced Gravitational Wave Detectors

    The Laser Interferometer Gravitational-Wave Observatory (LIGO) has begun a major set of upgrades to reach a sensitivity better than 10^-19 m-Hz^-0.5 in the 10 Hz to 10 kHz frequency band. This advance is expected to bring gravitational wave observations of relativistic astrophysical events such as black hole mergers and supernovae into the realm of regular astronomy. These upgrades require complex vibration isolation systems to better decouple the test masses from ground disturbances. These high performance systems require correspondingly more complex and aggressive active control loops to meet the increased demand in instrument sensitivity. This paper applies a modal damping technique with state estimation to optimize the trade-off between disturbance rejection and sensor noise amplification. The state estimator design applies a customized cost function around the LQR algorithm.

    Time Period

    June 27, 2012

    Presented To

    American Control Conference. June 27, 2012.

    Location

    Montreal, QC, Canada

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