초록 ▼

A navigation system for spinning projectiles using a magnetic spin sensor to measure the projectile roll angle by sensing changes in magnetic flux as the projectile rotates through the earth's magnetic field is disclosed. The magnetic spin sensor measurements are used to despin a body reference fram

A navigation system for spinning projectiles using a magnetic spin sensor to measure the projectile roll angle by sensing changes in magnetic flux as the projectile rotates through the earth's magnetic field is disclosed. The magnetic spin sensor measurements are used to despin a body reference frame such that position, velocity, and attitude of the projectile can be determined by using a strapdown inertial navigation system (INS) algorithm. More particularly, a multisensor concept is used to measure pitch and yaw angular rates, by measuring Coriolis acceleration along the roll axis and demodulating the pitch and yaw rates therefrom.

대표청구항 ▼

[ What is claimed is:] [12.] A navigation system for a spinning object in a magnetic field comprising:a signal processor;at least one magnetic sensor, attached to the spinning object and in communication with the signal processor, the at least one magnetic sensor configured to provide a roll signal

[ What is claimed is:] [12.] A navigation system for a spinning object in a magnetic field comprising:a signal processor;at least one magnetic sensor, attached to the spinning object and in communication with the signal processor, the at least one magnetic sensor configured to provide a roll signal representative of the orientation of the magnetic sensor relative to the magnetic field;a Coriolis acceleration sensor, attached to the spinning object and in communication with the signal processor, the Coriolis acceleration sensor configured to provide an attitude rate signal representative of the pitch rate and yaw rate of the object;at least one linear accelerometer, attached to the spinning object and in communication with the signal processor, the at least one linear accelerometer configured to provide an acceleration signal representative of the components of acceleration of the spinning object perpendicular to the roll axis; anda global positioning system (GPS) receiver, attached to the spinning object and in communication with the signal processor, the GPS receiver configured to provide a position signal representative of the position of the spinning object,wherein the signal processor is adapted to provide an output signal representative of the position, velocity, and attitude of the spinning object.