Monolithic folded pendulum accelerometers for seismic monitoring and active isolation systems
نویسندگان
چکیده
منابع مشابه
Triaxial Monolithic Piezoresistive Accelerometers in Foundry CMOS
1996 ii The thesis of Brett Alan Warneke is approved. Figure 3-7 Cross-sectional diagram of an aluminum trace running between oxide plates and contacting a polysilicon piezoresistor. The oxide and first metal overetch into the silicon substrate causes the trace Figure 3-8 SEM of a Skeleton Crew accelerometer with bond wires providing 9.6 µgm of additional proof mass. The plate has been bent up ...
متن کاملMulti-axial Active Isolation for Seismic Protection of Buildings
Structural control technology has been widely accepted as an effective means for the protection of structures against seismic hazards. Passive base isolation is one of the common structural control techniques used to enhance the performance of structures subjected to severe earthquake excitations. Isolation bearings employed at the base of a structure naturally increase its flexibility, but con...
متن کاملActive Database Systems for Monitoring and Surveillance
In many intelligence and security tasks it is necessary to monitor data in database in order to detect certain events or changes. Currently, database systems offer triggers to provide active capabilities. Most triggers, however, are based on the Event-Condition-Action paradigm, which can express only very primitive events. In this paper we propose an extension of traditional triggers in which t...
متن کاملSeismic shear waves as Foucault pendulum
Earth’s rotation causes splitting of normal modes. Wave fronts and rays are, however, not affected by Earth’s rotation, as we show theoretically and with observations made with USArray. We derive that the Coriolis force causes a small transverse component for P waves and a small longitudinal component for S waves. More importantly, Earth’s rotation leads to a slow rotation of the transverse pol...
متن کاملSeismic Isolation for Advanced LIGO
The baseline design concept for a seismic isolation component of the proposed “Advanced LIGO” detector upgrade has been developed with proofof-principle experiments and with computer models. It consists of a two-stage in-vacuum active isolation platform that is supported by an external hydraulic actuation stage. Construction is underway for prototype testing of a full-scale preliminary design.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Geoscience and Remote Sensing
سال: 2006
ISSN: 0196-2892
DOI: 10.1109/tgrs.2005.861006