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Self-aligning pitch and azimuth reference unit

  • US 4,166,406 A
  • Filed: 09/06/1977
  • Issued: 09/04/1979
  • Est. Priority Date: 09/06/1977
  • Status: Expired due to Term
First Claim
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1. A system for determining orientation or position comprising:

  • movable means having a principal direction of interest;

    an instrument assembly including an accelerometer having its sensitive axis aligned with said principal direction and a two-degree-of-freedom gyro having its spin axis fixedly aligned with the sensitive axis of said accelerometer; and

    support means for pendulously mounting said instrument assembly to said movable means for pendulous rotation only about an axis aligned with said principal direction of interest.

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