Kinematics: Describing the Motions of Spacecraft

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University of Colorado Boulder

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This module provides an overview of orientation descriptions of rigid bodies. The 3D heading is here described using either the direction cosine matrix (DCM) or the Euler angle sets. For each set the fundamental attitude addition and subtracts are discussed, as well as the differential kinematic equation which relates coordinate rates to the body angular velocity vector.

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The movement of bodies in space (like spacecraft, satellites, and space stations) must be predicted and controlled with precision in order to ensure safety and efficacy. Kinematics is a field that develops descriptions and predictions of the motion of these bodies in 3D space. This course in Kinematics covers four major topic areas: an introduction to particle kinematics, a deep dive into rigid body kinematics in two parts (starting with classic descriptions of motion using the directional cosine matrix and Euler angles, and concluding with a review of modern descriptors like quaternions and Classical and Modified Rodrigues parameters). The course ends with a look at static attitude determination, using modern algorithms to predict and execute relative orientations of bodies in space. After this course, you will be able to... * Differentiate a vector as seen by another rotating frame and derive frame dependent velocity and acceleration vectors * Apply the Transport Theorem to solve kinematic particle problems and translate between various sets of attitude descriptions * Add and subtract relative attitude descriptions and integrate those descriptions numerically to predict orientations over time * Derive the fundamental attitude coordinate properties of rigid bodies and determine attitude from a series of heading measurements

运动学:描述航天器的运动:必须精确地预测和控制太空中物体(例如航天器,卫星和空间站)的运动,以确保安全性和有效性。运动学是一个对3D空间中这些物体的运动进行描述和预测的领域。运动学课程涵盖四个主要主题领域:粒子运动学入门,分为两个部分深入研究刚体运动学(从使用方向余弦矩阵和欧拉角的经典运动描述开始,最后回顾现代描述子)例如四元数以及“经典”和“修改后的Rodrigues”参数)。本课程以静态姿态确定为结尾,使用现代算法预测并执行空间中物体的相对方向。 完成本课程后,您将能够... *区分另一个旋转帧看到的向量,并得出依赖于帧的速度和加速度向量 *应用运输定理解决运动学粒子问题,并在各种姿态描述之间进行转换 *添加和减去相对姿态描述,并将这些描述数字化以预测一段时间内的方向 *推导刚体的基本姿态坐标属性并通过一系列航向测量确定姿态

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