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Michael Gaitan, Jon C. Geist, Benjamin J. Reschovsky, Akobuije Chijioke
We report on a new approach to characterize the performance of a laser Doppler vibrometer (LDV). The method uses two acousto-optic modulators (AOMs) to
Lautaro D. Cilenti, Akobuije Chijioke, Balakumar Balachandran
Characterization and quantification of dynamic measurements is an ongoing area of research in the metrological community as new calibration methods are being
Instrumented impact testing allows the applicability of conventional Charpy tests to be extended toward assessing mechanical properties such as dynamic fracture
Nicholas Vlajic, Akobuije Chijioke, Enrico Lucon, Lance Einfeld
In recent years, investigations have been conducted at NIST (as a collaboration between the Fatigue and Fracture Group in Boulder, CO and the Force and Mass
Jake D. Rezac, Andrew M. Dienstfrey, Nicholas A. Vlajic, Akobuije D. Chijioke, Paul D. Hale
Many problems in time-dependent metrology can be phrased mathematically as deconvolution problems. In such cases, measured data is modeled as the convolution of
Michael Gaitan
,
Benjamin Reschovsky
and
Akobuije Chijioke
patent description Our results show that this approach is immediately useful as a tool for characterizing the bandwidth of an LDV as a system together with its acquisition and control electronics and amplifiers. Our future work is focused on further improvements on the system design and carrying out
Patent Description A longstanding and thorny problem in force metrology is that of accurately measuring rapidly changing forces. A key part of the problem is that the dynamic response of force sensors changes depending on the system in which the sensor is used, meaning that an external calibration