To further investigate the complex viscosity [absolute value of [[eta].sup.*]] as function of
angular frequency ([omega]), we fitted the experimental complex viscosity data to the Carreau-Yasuda model, as described by the following equation [28]:
For completeness, the numerical
angular frequency [[omega].sub.num] derived in this study is plotted against the wavenumber [kappa] in Figs.
Angular frequency at gel point as well as slope of the ln(G') vs.
The simulation results shown in Fig.4 and Fig.5 verify the ability of the proposed PLL to accurately lock to the supply
angular frequency and phase in one ac supply period under line disturbances, such as sag, harmonic, unbalance, whereas the conventional PLL fails to lock accurately in the highly distorted and unbalanced grid.
The guided wave is assumed to be travelling in a waveguide along OZ direction with wavenumber vector [k.sub.z] (direction of which coincides with OZ axis) at
angular frequency [omega].
The frequency sweep tests were performed at 25[degrees]C over the
angular frequency range of 0.1-10 rad/s.
The complex viscosity is shown as a function of
angular frequency in figure 5.
We write the equations of the BLDCM in the coordinate system d-q, tied to the rotational
angular frequency of the rotor.
where [x.sub.h](t) and [x.sub.r](t) denote the body movements of the heartbeat and the respiration signal in the human body, which can be expressed by sinusoids with amplitude a\t and a, and
angular frequency [[omega].sub.h] and [[omega].sub.r], respectively.
In asymptotically flat coordinates the
angular frequency detected by a distant observer is simply the coordinate angular velocity; that is, one evaluates