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METHOD AND APPARATUS FOR IMPLEMENTING A DATABUS VOTER TO SELECT THE COMMAND SIGNALS FROM ONE OF SEVERAL REDUNDANT ASYNCHRONOUS DIGITAL PROCESSING UNITS
METHOD AND APPARATUS FOR IMPLEMENTING A DATABUS VOTER TO SELECT THE COMMAND SIGNALS FROM ONE OF SEVERAL REDUNDANT ASYNCHRONOUS DIGITAL PROCESSING UNITS
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机译:实施数据总线投票器以从多个冗余异步数字处理单元之一中选择命令信号的方法和装置
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摘要
Asynchronous, triple redundant primary flight computers (PFC's) (12, 14, 16) produce output command signals carried over a data bus (18) to control redundant actuators (32, 34, 36) in an aircraft flight control system. To prevent the transmission of a fault and a force fight among the redundant actuators, which drive a common aircraft control surface (50), a databus voter (52, 54, 56) associated with each PFC receives all PFC commands and, in accordance with a selection algorithm, outputs a voted one of the PFC command signals. A databus voter monitor, (144) associated with each databus voter, deactivates its associated databus voter if it detects a voted command signal which is inconsistent with the selection algorithm.
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