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自 动 控 制 原 理第 七 章 采 样 数 据 控 制 系 统 分 析其 中 z、w 均 为 复 变 量 , 可写 作z= x+j y(3)w= u+j v(4)将 式 (3) 代 入 式 (2), 整 理 后 得xj y1w u jv+ +x jy12 2x + y −1 2y= −j (5)2 2 2x − + y x− + y2( 1 ) ( 1)

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