Single Coriolis Inertial Rate and Acceleration Sensor

Abstract

The Single Coriolis Inertial Rate and Acceleration Sensor (SCIRAS™)* measures both angular rotation and linear acceleration. By detecting Coriolis acceleration of a dithered accelerometer, it is possible to measure a direct rotation rate. Patented processing techniques have been developed which can separate Coriolis components of these signals from components due to linear acceleration with sufficient precision to achieve a few nmi/h sensor package. The sensor assembly (without electronics) weighs under 0.5 lb and fits within an 8 in3 package. The system costs substantially less than comparable RLG systems and uses about half as much power. There is no wear-out since this is an all-flexure device. The sensor is substantially rugged, being able to survive 1000 g shocks and 30 g vibration. Wide temperature applications are possible and shelf life is indefinite, since there are no exotic fluids or gases required for operation. This represents a marked reduction in life-cycle costs.