Title:
【発明の名称】アナログプロトコルコンバータシステムへのフェイルセーフデジタルバス
Document Type and Number:
Japanese Patent JPH07503090
Kind Code:
A
Abstract:
A failsafe avionics interface unit serves as a protocol converter system for translating data for control purposes from a digital communication bus to an analog control channel as an upgrade or interface to an existing analog control system. The avionics interface unit includes digital interface bus logic, a digital data processor module, an analog interface, and a mode selection circuit. Data communicated over the digital interface bus is periodically translated into equivalent analog control signals. For safety purposes, the avionics interface unit ensures the integrity of the system by repetitively looping back or wrapping the digital equivalents of the analog output signals and comparing them to commanded digital control values. The protocol converter system additionally monitors communications over the digital data bus for data continuity. If the difference between a wrapped digital equivalent of an analog output signal and an expected value exceeds tolerable limits or if communication fails, the system disconnects its interface from control using redundant software and hardware and returns control to the analog control system.
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Inventors:
Baker, john, arthur
Bow, otto, hobert
Berkland, Wayne, Erlin
Ed meds, robert, william
Bow, otto, hobert
Berkland, Wayne, Erlin
Ed meds, robert, william
Application Number:
JP50551894A
Publication Date:
March 30, 1995
Filing Date:
July 29, 1993
Export Citation:
Assignee:
Rear Astronix Corporation
International Classes:
G05B9/02; G05B9/03; G05D1/00; G06F11/00; B64C13/18; G06G7/48; G06G7/76; G06G7/78; G06J1/00; G06F11/16; (IPC1-7): G06G7/76; G05B9/02; G06G7/78
Attorney, Agent or Firm:
Akira Asamura (3 outside)