输入信号y=Acos(2*pi*f*t+c)+B的 A B C 的值， 采样过程中，每两次采样的间隔称为采样周期(Ts)。每次采样所用的时间称为采样时间(τ)。 在程序设计中τ的选择要保证在τ时间内被调量基本保持不变，比较重要的是Ts的选择。-Input signal y = Acos (2* pi* f* t+c)+B the ABC value of the sampling process, the sampling interval is called every two sampling period (Ts). Each sampling time used is called sampling time (τ). In programming τ is selected to ensure that the amount to be transferred within the time τ remained basically unchanged, the more important is the choice of Ts.