fundamental magnitude
1.Being quoted at MRAS full order observer,this paper analyzes the influence of the time of dead band and the stator voltage error caused for pipe voltage drop to observation of magnetic link,and the relationship between the stator voltage error and current observation error,presents the compensation methods for error of fundamental-wave magnitude of stator voltage and of dc component of stator voltage,and simulates them.It shows that this method is effective.
2.Accurate stellar trigonometric parallaxes may provide reliable data for studies on the physical properties and evolutional status of stars such as white dwarfs, red dwarfs, O and B stars, Herbig Ae and Be stars, and Ap and Am stars. Some fundamental parameters like absolute magnitude, effective temperature and radii of these stars and their positions in the HR diagram are of great importance in astronomical researches.
3.Based on wavelet transform theory, a novel method -integration of wavelet transform and simulating synchronous signal, is adopted for the detection of voltage flicker signal. And the fundamental, harmonics, emergence time, end time, magnitude and frequency of voltage flicker signal are precisely detected.
