초록 ▼

An inertial measurement unit is provided which includes a core inertial measurement unit having accelerometers and gyroscopes aligned along x, y and z axes to provide signals to an onboard computer to determine position of the vehicle upon which they are mounted while in movement. A fourth accelerom

An inertial measurement unit is provided which includes a core inertial measurement unit having accelerometers and gyroscopes aligned along x, y and z axes to provide signals to an onboard computer to determine position of the vehicle upon which they are mounted while in movement. A fourth accelerometer is pivoted perpendicular to the direction of the gravitational field for measuring the gravitational field about the axis upon which it is mounted to provide a reference set of data to an onboard computer prior to movement of the vehicle upon which the system is mounted.

대표청구항 ▼

An inertial measurement apparatus comprising: an inertial measurement unit strapped down within a flight vehicle, said inertial measurement unit comprised of at least three gyroscope means for measuring rotational movement of said flight vehicle along x (roll), y (pitch) and z (yaw) axes thereof and

An inertial measurement apparatus comprising: an inertial measurement unit strapped down within a flight vehicle, said inertial measurement unit comprised of at least three gyroscope means for measuring rotational movement of said flight vehicle along x (roll), y (pitch) and z (yaw) axes thereof and at least three accelerometer means for measuring translational motion of said flight vehicle along each of said axes; and separate, pivotally mounted accelerometer means for preflight measurement of the gravitational field acting on said flight vehicle along predetermined directions of a sensitive axis of said separate accelerometer means for calibration of bias and scale factor errors, said separate accelerometer means being locked in position for use of said preflight measurement as a matching reference for inflight data being generated by said inertial measurement unit when said flight vehicle is in flight to enhance targeting accuracy of said inertial measurement unit.