Method and system for adapting a navigation system
First Claim
1. A method for adapting a navigation system for a vehicle comprising:
- capturing measured values of navigation data with a controller for the navigation system from each of a base system and from at least one correction system, wherein the measured values include error values which describe discrepancies of the measured values from the navigation data;
recognizing the error values of the measured values of the at least one correction system based on the availability of the at least one correction system;
considering an availability of the at least one correction system by comparison of measured values captured at a particular time with other measured values captured at one of the same time and at a time which is substantially immediately in the proximity thereof; and
adapting parameters of a stochastic system model for the consideration, wherein the stochastic system model prescribes a weighting for measured values of the at least one correction system with respect to measured values of the base system in accordance with the parameters; and
wherein the base system is an inertial navigation system for the vehicle and the at least one correction system is one of a global satellite navigation system for the vehicle and an odometry navigation system for the vehicle.
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Abstract
A navigation system comprises a base system and at least one correction system. The base system and the at least one correction system each capture measured values. The measured values describe navigation data, and are each burdened with error values. The error values describe discrepancies in the measured values from the described navigation data. At least the error values of the measured values of the base system are recognized by the measured values of the at least one correction system and wherein the recognition is effected by considering an availability of the at least one correction system. The consideration represents adaptation of parameters of a stochastic system model. The stochastic system model prescribes a weighting for measured values of the at least one correction system with respect to measured values of the base system in accordance with the parameters.
15 Citations
17 Claims
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1. A method for adapting a navigation system for a vehicle comprising:
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capturing measured values of navigation data with a controller for the navigation system from each of a base system and from at least one correction system, wherein the measured values include error values which describe discrepancies of the measured values from the navigation data; recognizing the error values of the measured values of the at least one correction system based on the availability of the at least one correction system; considering an availability of the at least one correction system by comparison of measured values captured at a particular time with other measured values captured at one of the same time and at a time which is substantially immediately in the proximity thereof; and adapting parameters of a stochastic system model for the consideration, wherein the stochastic system model prescribes a weighting for measured values of the at least one correction system with respect to measured values of the base system in accordance with the parameters; and wherein the base system is an inertial navigation system for the vehicle and the at least one correction system is one of a global satellite navigation system for the vehicle and an odometry navigation system for the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A navigation system for use in a vehicle, comprising:
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a base system, in the form of an inertial navigation system, which receives data from at least one vehicle sensor; at least one correction system, wherein the base system and the at least one correction system capture measured values, which include error values, which describe discrepancies of the measured values from the navigation data and wherein the at least one correction system is one of a global satellite navigation system for the vehicle and an odometry navigation system for the vehicle; a controller for the navigation system with instructions for; recognizing the error values of the measured values of the at least one correction system based on the availability of the at least one correction system; considering an availability of the at least one correction system by comparison of measured values captured at a particular time with other measured values captured at one of the same time and at a time which is substantially immediately in the proximity thereof; and adapting parameters of a stochastic system model for the consideration, wherein the stochastic system model prescribes a weighting for measured values of the at least one correction system with respect to measured values of the base system in accordance with the parameters. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification