Angular Speed


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angular speed

[′aŋ·gyə·lər ′spēd]
(mechanics)
Change of direction per unit time, as of a target on a radar screen, without regard to the direction of the rotation axis; in other words, the magnitude of the angular velocity vector. Also known as angular rate.

Angular Speed

 

a quantity that characterizes the rate of rotation of a rigid body. If a body rotates uniformly about a fixed axis, its angular speed is ω = Δφ/Δt, where Δφ is the increment of the rotation angle φ in the time interval Δt. In general, angular speed is the magnitude of the vector quantity angular velocity and is equal to the ratio of the elemental rotation angle dφ and the corresponding elemental time interval dt—that is, ω = dφ/dt. The angular velocity vector is aligned with the rotation axis in the direction from which the rotation of the body is seen as counter-clockwise (in a right-handed coordinate system). Angular speed has the dimension T–1, where T is time. In English the term “angular velocity” is sometimes used synonymously with “angular speed.”

References in periodicals archive ?
The errors for the entire operating range studied rely on accurate prediction of stator angular speed. If stator angular speeds predictions are not accurate, it affects torque predictions above the coupling point.
The stopping times are very similar to the response times of LID 3354s when an initial angular speed is 0,2 rad/s (Tab.
Knee flexion and extension muscle strengths of the participants in the study were measured with Biodex System 3 Isokinetic test and Exercise Device (Biodex Inc., Shirley, NY, USA Model: 830-220) at 90 [degrees]/sec, 120 [degrees]/sec and 150 [degrees]/sec angular speeds. Dominant and non-dominant limbs of all the participants were tested.
It might have been interesting to study the effects of the variations of angular acceleration ([degrees]/[s.sup.2]) and even angular jerk ([degrees]/[s.sup.3]), as these are likely to have a greater effect than the angular speed alone ([degrees]/s) used in this article, but this is a task for future research.
As an important structure of an aeroengine, high-pressure turbine blisk suffers high gas temperature and pressure from main combustion chamber and high centrifugal force due to angular speed. The schematic diagram of a blisk is shown in Figure 3.
It is controlled by the angular speeds of four electric motors.
After two sub-maximal attempts, isometric muscle strength tests were applied with three repetitions at 30[degrees] shoulder abduction, and isokinetic concentric strength tests were applied with three repetitions at 60[degrees]/s angular speed and 16 repetitions at 120[degrees]/s angular speed.
The angular speed of the whirl [omega] is expressed in Equation (2) by using the angular speed of the crank-journal [OMEGA] and harmonic order n for the whirl.
Nine angular speed ranges were considered, from minimum to maximum rotation (~2500 to ~7000 RPM), with the blades of the air blower rotor exerting mechanical effort (or "load") of operation to the engine.
In fact, according to the angular speed of the platform and to the azimuth resolution selected for the polar plot, the number of radar sweeps to be integrated for each angular sector of the plot is automatically computed.
According to the structure of the EV seen in Figure 1(b), the proposed combined ASR/ABS control, described in Figure 13(b), uses as inputs the torque motor [T.sub.m], angular speed [[omega].sub.m], actual angular acceleration [[??].sub.m], actual slip ratio [lambda], and vehicle speed [v.sub.x] of the master motor which is selected by the master-slave switching, presented in the previous section.