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自 动 控 制 原 理第 五 章 频 域 分 析 法 - 频 率 法八 、 一 阶 不 稳 定 环 节传 递 函 数 :频 率 特 性 :对 数 幅 频 特 性 :Gs ( ) =1Ts −11G(j ω ) =jωT−1L( ω) = 20lg G(j ω) = 20lg对 数 相 频 特 性 :( ) G(j ω) arctanϕ ω1( ωT)2⎛ωT⎞=∠ =− ⎜−1⎟⎝ ⎠+ 1

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