Fractional-order observability analysis method for pulsar navigation system
A pulsar navigation and analysis method technology, applied in the field of fractional-order observability analysis for pulsar navigation systems, can solve problems such as inability to give, different analysis results, etc., to achieve convenient implementation, saving system resources, and small calculation amount Effect
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[0047] The technical scheme of the invention can adopt computer software to support the automatic operation process. The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.
[0048] Firstly, the present invention constructs a fractional order measurement matrix, so that historical measurement information can be fully utilized. Then, combined with the state transition matrix, the fractional observability matrix is constructed. Finally, an exponential weighted condition number is proposed, which synthesizes the condition number that changes in a period into a value, and uses this value to evaluate the accuracy of the navigation system.
[0049] The embodiment of the present invention uses a Mars probe, and the navigation pulsars are PSR B0531+21, B1821-24, and B1937+21. The orbits of the Martian satellites involved are shown in Table 1.
[0050] Table 1 Initial orbit parameters of Venus Express
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