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自 动 控 制 原 理第 七 章 采 样 数 据 控 制 系 统 分 析1( t−kT) −1( t−kT − τ ) = τδ( t−kT)δ ( t−kT)∞∑k=0⎧∞ ,t== ⎨⎩ 0, t ≠kTkTe * () t = ∑e( kT) τδ( t−kT)将 持 续 时 间 τ 移 至 和 式 外∞*e t τ e kT δ t kT() = ∑ ( ) ( − )k=0=0取 采 样 过 程 的 数 学 描 述 为∞*e t = ∑ekT δ t−kTk=0() ( ) ( )

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