1,850 research outputs found
Data analysis methods for non-Gaussian, nonstationary and nonlinear features and their application to VIRGO
No full textData analysis methods for non-Gaussian, nonstationary and nonlinear features and their application to VIRGO
No full text
Inertial monolithic sensors for low frequency acceleration measurement of spacecrafts and satellites
No full textIn this paper, we describe the characteristics and performances of a monolithic sensor designed for low frequency motion measurement of spacecrafts and satellites, whose mechanics is based on the UNISA Folded Pendulum technology platform. The latter, developed for ground-based applications, exhibits unique features (compactness, lightness, scalability, low resonance frequency and high quality factor), consequence of the action of the gravitational force on its inertial mass. In this paper, we present the general methodology for extending the application of ground-based folded pendulums to space, also in total absence of gravity, still keeping all their peculiar features and characteristics, discussing the most recent improvements
Tunable compact mechanical monolithic sensors for linear and angular large band low-frequency monitoring and characterization of sites and structures
No full textIn this paper we present monolithic implementations of tunable mechanical seismometers and accelerometers (horizontal, vertical and angular) based on the UNISA Folded Pendulum configuration, characterized by large measurement band 10â'7 ÷ 1 kHz, sensitivity down to ≠10â'15 m/√ Hz, high directivity > 104, low weight < 1.5 kg, dimensions < 10 cm, coupled to a large insensitivity to environmental noises and capability of operating in ultra high vacuum and cryogenic environments. Typical applications of this class of sensors are in the field of earthquake engineering, seismology, geophysics, civil engineering (buildings, bridges, dams, etc.), space (inertial guide)
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