An Attitude Stabilization Method for Failed Spacecraft with Tether Structure

Abstract

The invention discloses an attitude stabilization method for a failed spacecraft provided with a tethered structure. An operating body comprises an active spacecraft provided with an engine, and a string used for traction. The length of the string is determined depending on the specific working condition. When a target is determined, the active spacecraft emits the string with a claw at the tail end so as to connect a satellite of a target tethered spacecraft to form a ''failed spacecraft-string-failed spacecraft-active spacecraft'' structure. By adopting the attitude stabilization method, a three-body space tethered system dynamical model comprising failed components is established. The attitude stabilization method can effectively reduce the threat of space junk provide with the tethered structure on in-orbit spacecrafts, reduces the possibility of producing additional space debris due to collision of the tethered space junk, and is of great benefit to the orbital environment. The attitude stabilization method has low requirements on equipment, the required active spacecraft has the maximum thrust not exceeding 30N, and the operating tool is just the string with the length no more than 1000 meters; and the spatial operation conducted by adopting the attitude stabilization method is safer than the operation conducted by adopting a conventional manipulator.

Description

【Technical field】 [0001] The invention belongs to the field of aerospace technology, and relates to an attitude stabilization method for a failed spacecraft with a tether structure. 【Background technique】 [0002] With the development of space technology, space missions are becoming increasingly diverse and complex. Among many space systems, the tether system is an on-orbit service technology with broad application prospects. The tether system can expand the radius of the on-orbit operation to the order of 100 meters, thereby avoiding the collision risk caused by the close approach and docking of the space platform, reducing fuel consumption, and greatly improving the safety of the space platform during missions . Space tethers can also be used to connect multiple spacecraft, for example using high-strength metal fibers to recharge targets during space station maintenance. [0003] Most of the current tethered spacecraft are dumbbell structures, which consist of two space...

AI Technical Summary

Problems solved by technology

[0004] Although the space tether system has many advantages and broad application prospects, the attitude stability of this system is always a difficult problem

And when a space system with a tether structure fails, the entire system will become a piece of space junk that is difficult to stabilize its attitude.

To make matters worse, due to the failed dumbbell structure (the two satellites are connected by a rope in the middle), the spacecraft is composed of two parts, so when it loses control, the two parts are prone to collide and generate more space debris

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