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Near-space spacecraft attitude motion characteristic description model and modeling method thereof

A technology of motion characteristics and description models, which is applied in the field of aerospace and can solve problems such as staying spacecraft and not being discovered

Inactive Publication Date: 2017-08-18
SHANGHAI ENG CENT FOR MICROSATELLITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, in the research on attitude dynamics of spacecraft, no description of the motion characteristics of aerospace attitude under the action of aerodynamic moment has been found. Most of the research on attitude dynamics of spacecraft stays on the spacecraft itself, such as single rigid body dynamics , multi-rigid body dynamics, flexible dynamics, etc.

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  • Near-space spacecraft attitude motion characteristic description model and modeling method thereof
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  • Near-space spacecraft attitude motion characteristic description model and modeling method thereof

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Embodiment Construction

[0030] Hereinafter, the spirit and essence of the present invention will be further elaborated in conjunction with the drawings and embodiments.

[0031] The modeling method of the attitude motion characteristic description model of the near-space spacecraft provided by the present invention includes:

[0032] Step 1. Aerodynamic moment modeling

[0033] In order to calculate the aerodynamic moment, the following basic assumptions are made in the adjacent space of about 100km:

[0034] 1) Atmospheric molecules reaching the surface completely give the momentum to the surface of the satellite;

[0035] 2) The speed of the average thermal motion of the atmosphere is about 1 km / s, which is smaller than the speed of the satellite;

[0036] 3) Momentum exchange caused by atmospheric molecules leaving the surface is ignored;

[0037] Based on the above assumptions, let ρ be the atmospheric density at the location of the spacecraft, (V R is the velocity of the atmosphere relativ...

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Abstract

The invention discloses a near-space spacecraft attitude motion characteristic description model and a modeling method thereof. The near-space spacecraft attitude motion characteristic description model provided in the invention satisfies the relation shown in the description.

Description

technical field [0001] The invention relates to the field of spaceflight technology, in particular to a description model and a modeling method for attitude and motion characteristics of spacecraft in near space. Background technique [0002] In the prior art, there are few researches on the dynamics and kinematics of near-space spacecraft. As we all know, near-space spacecraft are subjected to great aerodynamic forces, and it is of great significance to study the attitude motion of spacecraft under the action of aerodynamic moments. However, in the current prior art, the aerodynamic torque is basically used as a disturbance or as an auxiliary attitude control torque for research. Few have integrated it with the dynamics of the spacecraft and described its motion laws, which has become a barrier in the design of attitude control systems for spacecraft in near space. [0003] At present, in the research on attitude dynamics of spacecraft, no description of the motion charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/08
CPCB64G1/244
Inventor 刘善伍陈宏宇刘洋容建刚陈婷夏喜旺王尊孙国文赵永佳
Owner SHANGHAI ENG CENT FOR MICROSATELLITES
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