Method for determining mass characteristic of spacecraft

Abstract

The invention relates to a method for determining a mass characteristic of a spacecraft. The method comprises the following steps of establishing a three-dimensional model of a spacecraft cabin segment and equipment; calculating a mass characteristic initial value of the spacecraft cabin segment and the spacecraft after partial cargoes are loaded by means of the three-dimensional model; measuringthe actually measured mass characteristic of the spacecraft cabin segment and the spacecraft after partial cargoes are loaded by means of mass measuring equipment; comparing the mass characteristic measured in 1.3 with the mass characteristic initial value obtained in 1.2, and when a comparison result exceeds a preset range, correcting the three-dimensional model and returning to 1.2; and when thecomparison result is in the preset range, entering the step 1.5; and calculating the mass characteristic of the spacecraft in a full-load state by means of the three-dimensional model which is obtained in 1.4. According to the method of the invention, the mass characteristic of a large or an ultra-large spacecraft or satellite can be accurately determined by means of the three-dimensional model and partial actual measurement.

Description

technical field [0001] The invention relates to a method for determining the quality characteristics of a spacecraft, in particular to a method for determining the quality characteristics of a spacecraft loaded with cargo (under a full load state). Background technique [0002] The mass characteristic is a characteristic of the spacecraft itself, mainly including the mass, the position of the center of mass and the moment of inertia, etc., and is the basic parameter of the dynamic model of the spacecraft. [0003] As a material transportation platform for the space station, the cargo spacecraft has the characteristics of a large amount of cargo and its own size and weight. Its length exceeds 10 meters, its diameter exceeds 3 meters, its weight exceeds 13000kg under full load, and its moment of inertia exceeds 28000kg.m 2 . Therefore, to measure the mass characteristics of the cargo spacecraft, there must be measuring equipment with a large enough size and a sufficient rang...

AI Technical Summary

Problems solved by technology

However, in the field of aerospace, when the spacecraft is fully loaded with cargo, due to the distribution of the loaded or transported cargo inside the spacecraft and the influence of many factors such as the shape and weight distribution of the cargo or equipment itself, the spacecraft fully loaded with cargo The medium weight distribution is complex, and the accuracy of the model needs to be verified and corrected to improve