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Navigation system for spinning projectiles

  • US 6,163,021 A
  • Filed: 12/15/1998
  • Issued: 12/19/2000
  • Est. Priority Date: 12/15/1998
  • Status: Expired due to Term
First Claim
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1. A sensor system for a spinning object in a magnetic field, to provide navigation information relative to a known frame of reference, the known frame of reference defined by a first known axis, a second known axis being perpendicular to the first known axis, and a third known axis being perpendicular to the first and second known axes, the spinning object having a despun frame of reference defined by a first despun axis aligned with the spin axis of the projectile, a second despun axis perpendicular to the first despun axis and the magnetic field, and a third despun axis perpendicular to the first despun axis and the second despun axis, the navigation system comprising:

  • a signal processor;

    at least one magnetic sensor in communication with the signal processor, the at least one magnetic sensor configured to provide a first electrical signal representative of the angular orientation of the body relative to the second despun axis and the third despun axis; and

    at least one angular rate sensor in communication with the signal processor, the at least one angular rate sensor configured to provide a second electrical signal representative of the angular rate of rotation of the object relative to the known frame of reference,wherein the signal processor processes the first and second electrical signals to provide output signals representative of the instantaneous attitude of the spinning object relative to the known frame of reference.

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