METHOD OF ESTIMATION OF ORIENTATION AND NAVIGATION PARAMETERS AND STRAP-DOWN INERTIAL NAVIGATION SYSTEM FOR FAST ROTATING OBJECTS Russian patent published in 2005 - IPC

FIELD: instrumentation engineering; orientation systems; determination of linear velocity and angular velocity relative to inertial, geographic and other coordinate systems.

SUBSTANCE: proposed system employs accelerometers for measurement of angular velocity; sensitivity axes of at least two of these accelerometers are oriented in directions not coinciding with direction of axis of fast-rotating object and not orthogonal relative to it; orientation and navigation parameters of fast-rotating objects are obtained taking into account processing of signals from said accelerometers by solving the differential equations with the use of Rodrigo-Hamilton or Keil-Kein parameters. Object motion parameter meters are made in form of five accelerometers, angular velocity sensor and temperature sensor mounted in housing; sensitivity axes of first pair of accelerometers are oriented in one plane with axis of fast-rotating object and are deflected from it in various directions by angle of 45 deg.; sensitivity axes of second pair of accelerometers are oriented in opposite direction in parallel with axis passing through centers of locating holes in housing of object; sensitivity axis of fifth accelerometer is oriented in direction parallel to axis, orthogonal axis of fast-rotating object and axis passing through centers of locating holes found in housing of object; sensitivity axis of angular velocity sensor is oriented along axis passing through centers of locating holes found in housing of object; information outputs of five accelerometers, angular velocity sensor and temperature sensor are connected to microprocessor outputs.

EFFECT: extended range and enhanced accuracy of measurements; reduced overall dimension and low cost of device.

4 cl, 4 dwg