Title :
Accelerometer and fiber optic gyro measurements of an instrumented cylinder used to study impact burial
Author :
Theophanis, Stephen
Author_Institution :
Naval Res. Lab., Stennis Space Center, MS, USA
Abstract :
The impact burial of anti-ship bottom mines in soft seafloors is dependent on the sediment properties and the velocity and orientation of the mine at the time of impact. A full-scale instrumented mine has been constructed to measure descent trajectory and velocity for ground truthing of hydrodynamic model predictions. A dynamic measurement unit (DMU) supplied by Crossbow Technology is the primary sensor employed for this measurement. The six channels of data provided by the DMU are three orthogonal DC coupled accelerations, and three angular rates (about the axis system defined by the accelerometers). We develop a signal processing algorithm that converts the raw DMU data into a time history of the mine´s position and orientation during deployment. The algorithm is then tested on DMU data gathered from well-characterized instrument motion to quantify the accuracy of our measurement capability.
Keywords :
accelerometers; fibre optic gyroscopes; matrix algebra; military equipment; sediments; signal processing; Crossbow Technology; accelerometer measurements; anti-ship bottom mines; cohesive sediments; dynamic measurement unit; fiber optic gyro measurements; hydrodynamic model predictions; impact burial; instrumented cylinder; matrix; mine countermeasure; sediment properties; signal processing algorithm; soft seafloors; Accelerometers; Hydrodynamics; Instruments; Optical fibers; Predictive models; Sea floor; Sediments; Signal processing algorithms; Trajectory; Velocity measurement;
Conference_Titel :
OCEANS '02 MTS/IEEE
Print_ISBN :
0-7803-7534-3
DOI :
10.1109/OCEANS.2002.1193253