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Rotordynamics (or rotor dynamics) is a specialized branch of applied mechanics concerned with the behavior and diagnosis of rotating structures. It is commonly used to analyze the behavior of structures ranging from jet engines and steam turbines to auto engines and computer disk storage .
A spacecraft's attitude must typically be stabilized and controlled for a variety of reasons. It is often needed so that the spacecraft high-gain antenna may be accurately pointed to Earth for communications, so that onboard experiments may accomplish precise pointing for accurate collection and subsequent interpretation of data, so that the heating and cooling effects of sunlight and shadow ...
The Newton–Euler equations are used as the basis for more complicated "multi-body" formulations (screw theory) that describe the dynamics of systems of rigid bodies connected by joints and other constraints. Multi-body problems can be solved by a variety of numerical algorithms.
A rotating frame of reference is a special case of a non-inertial reference frame that is rotating relative to an inertial reference frame.An everyday example of a rotating reference frame is the surface of the Earth.
The three axes of rotation in an aircraft. Flight dynamics is the science of air vehicle orientation and control in three dimensions. The three critical flight dynamics parameters are the angles of rotation in three dimensions about the vehicle's center of gravity (cg), known as pitch, roll and yaw.
The description of rotation then involves these three quantities: Angular position: the oriented distance from a selected origin on the rotational axis to a point of an object is a vector r(t) locating the point. The vector r(t) has some projection (or, equivalently, some component) r ⊥ (t) on a plane
In physics, dynamics or classical dynamics [1] [2] [3] is the study of forces and their effect on motion. It is a branch of classical mechanics , along with statics and kinematics . The fundamental principle of dynamics is linked to Newton's second law .
Newton's second law, applied to rotational rather than linear motion, becomes: [33] =, where is the net torque about an axis of rotation exerted on the vehicle, I x is its moment of inertia about that axis (a physical property that combines the mass and its distribution around the axis), and is the angular acceleration about that axis in ...