Method and apparatus for implementing a databus voter to select flight command signals from one of several redundant asynchronous digital primary flight computers
US5515282A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 25, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Apr 25, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/0077
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.