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Inertial navigation system

  • US 4,085,440 A
  • Filed: 05/05/1977
  • Issued: 04/18/1978
  • Est. Priority Date: 05/05/1977
  • Status: Expired due to Term
First Claim
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1. A navigational system comprising:

  • a platform assembly comprising an inertial platform unit which includes an inertial platform, a level platform unit which comprises a level platform, said inertial platform and said level platform being connected to a two axis gimbal, said inertial platform being rotatable relative to said level platform, and means connected to said two axis gimbal for sensing said rotation,a three axis gimbal connected to said platform assembly for referencing said inertial platform in response to first corrected signals and for connecting said assembly to a vehicle,an inertial platform position control computer for generating said first corrected signals to said three axis gimbal, in response to first output signals generated from a control means to said inertial platform unit and first positioning signals received from said inertial platform unit, for referencing said inertial platform to a datum reference spheroid, and,a control means for generating said first output signals, and for generating second corrected signals to said two axis gimbal in response to second positioning signals received from said level platform unit, second output signals received from said sensing means, and third output signals received from said inertial platform unit, for aligning said level platform with the true vertical to the geopotential surface of the earth.

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