Autonomous optical navigation method for soft landing for deep space probe

Abstract

The invention relates to an autonomous optical navigation method for soft landing of a deep space probe, and belongs to the field of space flight and aviation. The autonomous optical navigation method comprises the following steps: firstly, reading a corresponding pixel and a pixel line coordinate of a target landing point on an image plane photographed by an optical navigation camera, and the distance of the probe from a landing plane in three laser ranging device mounting directions; secondly, determining the posture of the probe relative to a landing plane of a target astronomical body by using the obtained distance measured by the three laser ranging devices and the mounting azimuth angle and pitch angle of the known ranging device; thirdly, determining the position relationship between the probe and the target landing point by using the obtained distance di measured by the three laser ranging devices and the pixel and the pixel line coordinate of the target landing point; and finally, performing filter estimation on the position, speed, posture and angular speed information of the probe relative to the landing area. The autonomous optical navigation method for the soft landing of the deep space probe has the characteristics of high reliability, low cost and strong real-time, and can highly precisely determine the position and posture of the probe relative to the target landing point.

Description

technical field [0001] The invention relates to an autonomous navigation method of a deep space probe, in particular to a method for autonomous navigation of a deep space controller using optical information during a soft landing process, belonging to the field of aerospace. Background technique [0002] The soft landing of the probe on the target celestial body will be one of the most complex tasks in deep space exploration in the future. In order to ensure the successful completion of the landing task, it is necessary to control the probe to reach the target landing point accurately while ensuring that its relative velocity is zero and its attitude is perpendicular to the target. Therefore, it is necessary to accurately determine the position, velocity and attitude of the probe relative to the target celestial body. Due to the long communication delay, the traditional deep space network-based navigation mode can no longer meet the needs of high-precision soft landing. Due...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing autonomous optical navigation technology has a high system complexity and cannot support the completion of high-precision soft landing tasks. Aiming at the requirements of autonomy and real-time performance of deep space soft landing tasks, a deep space navigation system is proposed. Autonomous Optical Navigation Method for Probe Soft Landing

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