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Integrated guidance system and method for providing guidance to a projectile on a trajectory

  • US 5,442,560 A
  • Filed: 07/29/1993
  • Issued: 08/15/1995
  • Est. Priority Date: 07/29/1993
  • Status: Expired due to Term
First Claim
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1. 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.

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