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High-observability optical pulsar hybrid navigation method for deep space probe

A deep-space detector and hybrid navigation technology, applied in the field of deep-space detector navigation, can solve the problems of unobservable systems, achieve the effects of enhancing observability, improving navigation accuracy, and reducing convergence time

Inactive Publication Date: 2017-09-08
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

Since there is only 1 vector, the system is locally unobservable

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  • High-observability optical pulsar hybrid navigation method for deep space probe
  • High-observability optical pulsar hybrid navigation method for deep space probe
  • High-observability optical pulsar hybrid navigation method for deep space probe

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[0040] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0041] Such as figure 1 Shown is a schematic diagram of the optical pulsar hybrid measurement scheme of the present invention, wherein SSB refers to the solar system barycenter (Solar System Barycenter, which is the origin of the coordinate system in the figure, and the r of the deep space probe is calculated relative to this point), Pulsar 1 and Pulsar 2 are used for pulsar observations of near celestial bodies (such as Mars). When deep space probes approach large celestial bodies, they introduce optical observations of nearby celestial bodies as a supplement.

[0042] The optical pulsar mixing highly observable deep space navigation method described in the present invention has the following steps:

[0043] Step 1: When the detector is close to the large celestial body, the optical observation of the adjacent celestial body is introduce...

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Abstract

The invention discloses a high-observability optical pulsar hybrid navigation method for a deep space probe. The high-observability optical pulsar hybrid navigation method comprises the following steps: 1: mixing a pulsar observation equation with an optical observation equation to build a hybrid observation equation; 2: building a probe state equation by using a deep space probe multibody gravity model and taking an inertia position and the speed of the probe as state quantities; 3: constructing extended Kalman filter to perform optimal estimation calculation on the state of the probe in order to obtain a position and a speed under an accurate probe inertial system. By adopting the high-observability optical pulsar hybrid navigation method disclosed by the invention, the problem of large inertial navigation accumulative error is solved, the problem of poor observability in pulsar navigation is solved, the observability of a navigation system is enhanced greatly, the convergence time of the navigation system is shortened greatly, and the navigation accuracy is increased effectively; the high-observability optical pulsar hybrid navigation method can be directly applied to autonomous control of the deep space probe.

Description

technical field [0001] The invention relates to a navigation method for deep space probes, in particular to a high-observability optical pulsar hybrid navigation method for deep space probes, which comprehensively utilizes the angle observation information of the celestial body and the pulsar distance observation information to calculate the depth Null detector master precision navigation information. Background technique [0002] Ground radio navigation capabilities are limited by factors such as the distribution of measurement and control stations and the distance between devices and ground. It is difficult to provide affordable high-precision real-time navigation information for deep detectors. The traditional inertial navigation is not suitable as the main navigation method due to the error accumulation effect. Single-target optical autonomous navigation is not entirely impressive, and it is difficult to extend to the entire flight phase. X-ray pulsar navigation techno...

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Application Information

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IPC IPC(8): G01C21/24
CPCG01C21/24
Inventor 刘宇阳光王卫华苏枫秦长涛
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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