non-integral

An Analytic estimative formula of FFT leakage error for non-integral period sampling is analyzed and derived and in the case of the input signal including fundamental wave and higher harmonics, a new calculating method of realizing the self-adaptive Integral period sampling with FFT iterative calculation is obtained.

分析推导了非整周期采样时FFT泄漏误差的解析估计公式，得出了在输入信号含基波和高次谐波分量的情况下，利用FFT迭代计算来实现自适应整周期采样的一种新算法。

This paper gives the concept of asynchronous z-transform, by use of which the arbitary time-shift theorem is deduced for discrete-time systems with non-integral time-shifts, and a rational time-shift theorem is given.

本文提出了异步z-变换的概念，由此研究了具有非整时移离散序列任意时移定理，给出显式的有理时移定理。

Profilometry for phase measurement with non-integral times twin-frequency grating is proposed, lowering the errors transferring during phase-unwrapping. The simulating experiment compared with integral times twin-frequency grating shows that the measuring precision is improved.

提出了采用非整数倍双频光栅投影的相位测量轮廓术，减小在相位展开过程中误差的传递，与采用整数倍双频光栅投影测量进行了模拟对比实验，表明测量精度得到了提高。