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System for multiple navigation components

  • US 8,224,574 B2
  • Filed: 05/09/2005
  • Issued: 07/17/2012
  • Est. Priority Date: 05/12/2004
  • Status: Active Grant
First Claim
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1. An apparatus, comprising:

  • a master navigation component determines navigation measurement data in a first coordinate system; and

    one or more slave navigation components that determine navigation measurement data of the one or more slave navigation components each in their own secondary coordinate system;

    wherein the master navigation component is disposed at a first location in a vehicle and a first one of the slave navigation components is disposed at a second location in the vehicle, the first and second coordinate systems being associated with the first and second locations, respectively;

    wherein the one or more slave navigation components provide the navigation measurement data of the one or more slave components each in their own secondary coordinate system to the master navigation component;

    wherein the master navigation component compares the navigation measurement data of the one or more slave components each in their own secondary coordinate system to navigation measurement data for the master navigation component in the first coordinate system, the master navigation component and the slave navigation components obtaining measurement data using the same type of measuring instruments and without information being received from a source outside of the vehicle;

    wherein the master navigation component translates the navigation measurement data of the one or more slave navigation components in the second coordinate system into navigation measurement data of the one or more slave navigation components in the first coordinate system;

    a portion of the vehicle between the first location with the master navigation component and the second location with the first one of the slave navigation components defining a corresponding lever arm;

    a dynamic location component coupled to the master navigation component wherein the dynamic location component provides dynamic information during bending of the lever arm between the first and second locations due to bending of said portion of the vehicle, the displacement between the first slave navigation component and the master navigation component changing due to physical deflection of the second location relative to the first location, the master navigation component estimating the error in the navigation measurement data of the first slave navigation component at the second location based on the dynamic displacement information during bending of the lever arm due to bending of the vehicle;

    the master navigation component correcting the navigation measurement data of the first one of the slave navigation components based on the estimated errors due to bending of the portion of the vehicle defining the lever arm;

    a static location component coupled to the master navigation component wherein the static location component provides static navigation information based on the distance between the first and second locations while the vehicle is not undergoing bending, the master navigation component estimates the error in the navigation measurement data of the first slave navigation component at the second location based on the static distance information;

    a summation element that receives inputs from the static location component and the dynamic location component, the summation element providing an output that provides estimates of error in the navigation measurement data of the second coordinate system relative to the first coordinate system based on the dynamic displacement data and static navigation information.

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