双卫星形成的相对态度稳定性分析,用于在空间碎片环境中的重力场探测
1MOE Key Laboratory of TianQin Mission, TianQin Research Center for Gravitational Physics and School of Physics and Astronomy, Frontiers Science Center for TianQin, CNSA Research Center for Gravitational Waves, Sun Yat-Sen University, Zhuhai, 519082, China.
Scientific reports
|September 25, 2023
概括
太空碎片的影响可能会破坏双卫星重力任务. 这项研究模拟了碰撞概率,并使用模拟来评估态度稳定性,为任务寿命和控制系统可靠性提供了关键数据.
科学领域:
- 航天器的动态和控制控制.
- 轨道力学和空间碎片
- 重力场的探索重力场的探索
背景情况:
- 低地球轨道航天器面临着来自太空碎片冲击的重大风险.
- 这种影响可能会破坏科学操作,破坏双卫星组成的控制系统的稳定性.
- 保持姿态稳定对于成功的重力场探测任务至关重要.
研究的目的:
- 为了研究在太空碎片环境中的近圆,极地轨道上的双卫星组成的态度稳定性.
- 开发控制模型,考虑随机碰撞及其对卫星态度和控制系统的影响.
- 提供10年时间内的太空碎片影响导致的任务风险的定量评估.
主要方法:
- 基于利亚普诺夫控制和线性二次调节器 (LQR) 的两个控制模型的开发,用于随机碰撞.
- 碰撞概率和动量转移的建模,利用国际碎片软件进行分布规律.
- 蒙特卡洛模拟用于分析碎片撞击后相对态度和推力扭矩的变化.
主要成果:
- 对独立碰撞的概率密度函数的量化.
- 模拟卫星中由于短期影响而发生的角运动量变化.
- 估计任务关键事件,包括态度偏离科学模式和控制系统分歧,超过10年的时间框架.
结论:
- 该研究为评估空间碎片对双卫星重力探索任务的影响提供了必要的数据.
- 开发的模型和模拟提供了一个参考,以确保运营连续性和控制系统完整性,这样的形成.
- 了解和减轻碎片撞击风险对于长期太空科学任务的成功至关重要.
相关概念视频
Circular Orbits and Critical Velocity for Satellites
2.9K
The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
2.9K
Energy of a Satellite in a Circular Orbit
2.3K
Thousands of artificial satellites orbit the Earth every day at various distances from the Earth. Satellites that orbit the Earth below an altitude of 1,600 km are considered to be orbiting in low-Earth orbit (LEO). Research satellites and Earth observation satellites are usually placed in LEO, and mostly orbit the Earth in elliptical orbits. Navigation satellites are placed in medium-Earth orbit (MEO), ranging from 2,000 km to 36,000 km from the surface of the Earth. Meanwhile, communication...
2.3K
Relative Motion Analysis using Rotating Axes-Problem Solving
418
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
418
Reduced Mass Coordinates: Isolated Two-body Problem
1.3K
In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...
1.3K
Relative Motion Analysis using Rotating Axes
482
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
482
Relative Motion Analysis using Rotating Axes - Acceleration
352
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
Time differentiation is...
352


