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自 动 控 制 原 理第 四 章 复 域 分 析 法 - 根 轨 迹 法广 义 根 轨 迹 渐 近 线 与 实 轴 的 交 点 :− 3.8371 + 0.4186 +0.4186σa= =−1.53−1ϕa= ± π 22 取 K = 3,6,9 等 值 :开 环 零 、 极 点 :z 1 = 0;p p 1 = -2.6717,p p 2,3 = -0.1642 ± j1.0469开 环 零 、 极 点 :z 1 = 0 ; p 1 = -3,p 2,3 = ± j1.4142开 环 零 、 极 点 :z 1 = 0 ; p 1 = -3.24,p 2,3 = 0.12 ± j1.6623

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