{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"8211d12f-42ae-4ed6-80ed-8c228ba7681b","title":"生产力 工业自动化的社会史","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787300172651","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"8211d12f-42ae-4ed6-80ed-8c228ba7681b","id":"8211d12f-42ae-4ed6-80ed-8c228ba7681b","uuid":"8211d12f-42ae-4ed6-80ed-8c228ba7681b","title":"生产力 工业自动化的社会史","normalized_title":"生产力工业自动化的社会史","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787300172651","isbns":["9787300172651","0394512626"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":459,"navigation_url":"https://workshop.closeclaw.top/ai/book/8211d12f-42ae-4ed6-80ed-8c228ba7681b","title_url":"https://workshop.closeclaw.top/ai/title/%E7%94%9F%E4%BA%A7%E5%8A%9B%20%E5%B7%A5%E4%B8%9A%E8%87%AA%E5%8A%A8%E5%8C%96%E7%9A%84%E7%A4%BE%E4%BC%9A%E5%8F%B2","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/8211d12f-42ae-4ed6-80ed-8c228ba7681b/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/8211d12f-42ae-4ed6-80ed-8c228ba7681b/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/8211d12f-42ae-4ed6-80ed-8c228ba7681b","page_url":"https://workshop.closeclaw.top/api/ai/books/8211d12f-42ae-4ed6-80ed-8c228ba7681b/page","search_url":"https://workshop.closeclaw.top/api/ai/books/8211d12f-42ae-4ed6-80ed-8c228ba7681b/search"},"page":{"printed_page":"358 / /423","pdf_page":437,"physical_index":437,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"928237a6bc4b45c024fd4861ea606de3c8bc8d0939f4c80789bc8fdbb30b33cd"},"chapter":"第4章 关于自动化工厂的争议","content":"学的绝妙典范。车床的每根轴都实现了机动化，并由一部自动同步发电机来连接进给电动机，其中自动同步发电机是该系统的核心。该系统将直线动作转换为角度转动，再将角度转动转换成电压相位信号，反过来也一样。将发电机安装上同步装置，这意味着在几个关键变量中建立了一个固定的联系：沿着轴直线运动0.075英寸就等于旋转360°，或者说电压信号的一单位相移。\n\n在记录的时候，数根机器操作轴或跟踪指针的动作记录在磁带上不同的磁道，同时还生成相应的参照信号。每个动作信号都由同步装置的电压信号的相位来表示，后者又对位于同步转子的角度与机器部件的线性位置(纵长度进给、横向移动等)。在回放的时候，读取控制带，沿着每个磁道重新制造出动作信号，并将这些动作信号转换成相当的控制轴动作。与此同时，将参照信号发送给同步装置，同步装置生成一个电压信号，后者的相位对应于相应角度，再转换成机器各个部件的实际直线位置。同步装置的信号与磁带的动作信号将输入一个鉴相器，再将相差信号增强以开动进给电动机。电动机再改变机器部件的线性位置，它通过将同步装置的角度信号与相位信号对应于磁带的控制信号从而最大限度地减少误差。这是一个彻底的闭环控制系统，它确保机器部件在任何时候都能实际对应于所记录的信息，从而忠实而连续地记录了原初的动作。除了动作之外，通过对磁带的磁道上加入某些必要的信号，该系统也能用于记录和回放间隔性的（开一关）操作，比如轴马达、油泵、冷却液泵等。\n\n附录一\n\n358\n\n/423","previous_page":436,"next_page":438}