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自 动 控 制 原 理第 二 章 控 制 系 统 的 数 学 模 型6. 单 位 脉 冲 函 数 (δ 函 数 )δ(t)δ 函 数 的 表 达 式 为⎧∞t =0+∞δ () t = ⎨且 ∫ δ ()d t t = 10 t ≠ 0−∞⎩其 拉 氏 变 换 为OtL∫ 0+∞− stF( s) = [ δ( t)] = ∫ δ( t)e dt= 1

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