# inertial frame

Also found in: Dictionary, Thesaurus, Wikipedia.
Related to inertial frame: Inertial frame of reference

## inertial frame

(i-ner -shăl) A frame of reference in which an isolated particle placed at rest will remain at rest, and one in uniform motion will maintain a constant velocity. It is thus a frame of reference that is not subject to acceleration, as from a gravitational field, and in which Newton's first law of motion applies. According to Einstein's special theory of relativity, which is concerned only with inertial frames, all laws of physics are the same in every inertial frame.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive ?
When [S.sub.1] = 0, [S.sub.2] = 0, and [S.sub.3] = 0 are satisfied, Step D finally controls the single spinning angle to the target angle by the time profile of [T.sub.III], which is planned beforehand such that the position (X and Y) in the inertial frame coincides with the target positions.
where [m.sub.c] is the mass of the aircraft, [F.sub.i] (i = x, y, z) represents the force of axes of aircraft-body coordinate frame, respectively, [bar.L], M, and N are moments of body frame, u, v, and w are speed components of body frame, [theta], [psi], and [phi] represent pitch angle, yaw angle, and bank angle, respectively, p, q, and r are angular velocity from body frame to inertial frame resolved in body frame, [x.sub.g], [y.sub.g], and [h.sub.g] represent the position of the aircraft in inertial frame, [I.sub.x], [I.sub.y], and [I.sub.z] are rotary inertias of axes of body frame, V is true airspeed, and [gamma], [phi] are flight-path angles between the first/second axis of wind coordinate frame and inertial frame, respectively.
The transformation model approach proposes to align both bone volumes to the inertial frame to give them the same location and orientation in 3D space and to allow the subsequent shape comparison.
At time t the position of the rocket in the inertial frame are [[x.sub.0] (t) [y.sub.0] (t)]', and the angle between the i-th rope segment and the Y axis is [[theta].sub.i] (t).
They call the Cosmic frame "the inertial frame", "flat space", "the co-moving frame", "the gravitational field" or "the most convenient frame".
It appears that I confuse light cones with inertial frames of reference in the review at the bottom of p.
In the nomenclature chapter we denote the fixed inertial frame of reference E as [x.sub.2][y.sub.2][z.sub.2], and the moving noninertial frame of reference B as [x.sub.1][y.sub.1][z.sub.1], which is rigidly bounded with the crane boom [BO.sub.2].
The central body frame (1) is fixed at the mass center with its final orientation reached by following the conventional aerospace sequence of three body-fixed rotations using the Euler yaw [[psi].sub.1], pitch [[theta].sub.1], and roll [[phi].sub.1] axis starting from the inertial frame (I).
Moreover, some dynamic algorithms, which compute the acceleration due to the Earth's gravity field and the atmospheric drag, may be formulated simpler in an Earth-fixed than in an inertial frame.
As the space station can translate and rotate freely about the inertial frame axes, the total DOF of the system is n + 6.
Let us take n measured data by inertial measurement unit (for simplicity consider only one inertial sensor for instance gyroscope X; let us denote it by the symbol [[omega].sup.x] where [omega] represents the part of angular rate vector of the body frame with respect to the inertial frame projected to the x axis of body frame).

Site: Follow: Share:
Open / Close