If sampling length doesn't adapt rotative velocity, the results of calculation by FFT or periodogram analysis will lead to pseudo-periods, which distorts the principal value function terms.
若采样长度与回转速度不吻合，将会出现伪周期，使主值函数项中提取周期成分后的信号失实。
2
The proposed controllers can achieve partial synchronization for the angular velocity with respect to the principal axes of inertia between angular velocity motions of the two rigid bodies discussed.
所设计的控制器可以实现两个刚体的角速度运动达到关于惯性主轴角速度的部分同步。
3
Abstract: Air velocity as a principal parameter of thermal load affects the regulation of thermal balance of poultry along with ambient temperature and humidity.