外文翻译-双速率数据采样系统的仿真大学论文.doc Simulation of dual-rate sampled-data system

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外文翻译-双速率数据采样系统的仿真大学论文.doc 是一篇关于双速率采样系统仿真问题的论文。论文通过应用离散提升技术、快速采样算子和快速保持算子来研究双速率系统的仿真问题。该方法可以实现接近连续时间信号仿真的结果。论文利用MATLAB环境对一个实际例子进行了具体的仿真步骤和编程研究。关键词：双速率数据采样系统；离散提升技术；快速采样算子；快速保持算子 1. 引言采样控制系统是指对连续和数字系统进行对象控制的控制器。目前，大多数控制系统都是由计算机实现的离散采样控制系统控制对象的连续充电。随着连续输入信号的采样和保持变得越来越重要，这一领域的研究也变得越来越受关注。本文通过应用离散提升技术、快速采样算子和快速保持算子来研究双速率系统的仿真问题，提出了一种可以接近连续时间信号仿真的方法。具体地，本文利用MATLAB环境对一个实际例子进行了具体的仿真步骤和编程研究。

wHKSGHKSGIHGGz ])([

221211

�

��

Dual-rate sampling control system input and output channels, by adding a virtual

sampler and maintain fast, and as shown in Figure 1, the virtual fast sampler and

holder of the sampling period T / n.

Wd is the w to T / n for the sampling period of the sampling signal, when the input

signal mph time for the simulation, there Wd = w (kT / n), k = 0,1, ..., mn/p1

zd and the relationship between z Ibid. Clearly, when n → ∞ when, wd = w, zd = z.

To make the number of discrete-time sequence for positive integer, n as the integer

multiple of l. Study shown in Figure 1 of the simulation system, virtual box can be

dual-rate sampling control system input and output signals for the simulation results.

Figure 1 zd = Snz, w = Hnwd, it is by the type (2)

dnn

nnn

nnd

wGKSHHKSG

IHSGG

wHKSGHKSG

IHGGSzSz

])

([

])

([

1211

�

��

�

��

Which G11n, G12n, G21n to correspond to the cycle of T / n of the discretization.

Formula (4) is dual-rate sampling control system simulation expression.

2.2 Simulation of the calculation of expression

Expression of desire (4), first obtained G11n, G12n, G21n, SnH, SHn,

(I-KSG22H)-1K, etc. value. Which G11n, G12n, G21n continuous transfer function

of G11, G12, G21 single-cycle T / n of the discretization are easy to calculate.

Discussed below SnH, SHn, (I-KSG22H)-1K calculations.

(1) SnH calculation

Figure 2 Expressiong for Input and Output of SHn

Figure 2 of the cycle in Hn for T / n = lh / n, S the cycle ph, while x2 (0) = x1 (0), x2

(1) = x1 (n/p1), ..., x2 (m -1) = x1 ((m-1) n/p1), It is SHn =

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