Initial value synchronization method for improving landing navigation accuracy
A technology of initial value synchronization and navigation accuracy, which is applied in the field of navigation task requirements, can solve problems such as navigation errors, and achieve the effect of avoiding navigation errors and being easy to implement
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[0021] Such as image 3 The concrete steps of shown method of the present invention are:
[0022] 1) Before the detector starts the landing and descent procedure, the ground measurement and control station injects the start time t of the landing and descent procedure into the detector 0 and t 0 The location information of the time detector r 0 and velocity information v 0 ;
[0023] 2) Start time t according to the landing descent procedure injected on the ground 0 , and the current control cycle start time t, calculate the new landing and descent program start time t 0new , the specific method is: (t 0new -t)=n×T, and t 0new >t 0 , (t 0new -T)0 ; where n is a positive integer, and T is the control cycle of the onboard computer
[0024] 3) The onboard computer on the probe uses the position information r obtained in step 1) 0 and velocity information v 0 as the initial value, with t 0new -t 0 is the orbital integration time, using orbital extrapolation method to ...
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