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Dual-channel selection method for airborne computer

An airborne computer and channel selection technology, which is applied to the redundancy in calculation and operation for data error detection and response error generation, etc.

Active Publication Date: 2016-05-04
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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Problems solved by technology

However, there is still no effective and reliable solution for how to perform dual-channel selection in computer work.

Method used

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  • Dual-channel selection method for airborne computer
  • Dual-channel selection method for airborne computer
  • Dual-channel selection method for airborne computer

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with accompanying drawing. What has been described is by way of explanation, not limitation, of the invention.

[0035] figure 1 It is a schematic diagram of channel health bit vector and health state priority table. BV_LOC is the channel health bit vector of this channel. BV_LOC has a total of n bits, each of which is set according to the fault priority in Table 1. The higher the priority of the fault, the smaller the X value in Table 1, and the greater the impact on the control system when the fault occurs. The fault with the highest priority is the ECUI fault, and its priority is 0, so the most significant bit of BV_LOC (assuming the bit number is 0) is set as the ECUI fault. Other failures are set in BV_LOC according to priority. The higher the priority of the fault, the smaller the bit number of the fault bit in BV_LOC.

[0036] Table 1 Health status priority table

[0037]

[0038]

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Abstract

The invention relates to a dual-channel selection method for an airborne computer. The method has relatively high fault tolerance for a cross channel data link fault. The method mainly comprises the following steps: (1) performing self-testing of each channel independently during the computer initialization stage and the periodic task execution period, and filling in a channel health bit vector according to a self-testing result of each channel by reference to a health state priority table; (2) after determining the channel health bit vector, sending the channel health bit vector of each channel to an opposite party by each channel, and performing comparison to obtain a channel internal selection result; and (3) participating in voting by the channel internal selection results to finally determine a main channel. According to the method, a health state of each channel can be effectively determined in the dual-channel airborne computer; the method has relatively high fault tolerance for the cross channel data link fault; and through theoretical analysis and experiments, a redundancy system using the method can effectively select an optimal channel, so that the system reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of airborne computers, and relates to an airborne embedded computer, especially a dual-channel selection method for an electronic controller. Background technique [0002] Aircraft and aerodynamic control systems have generally used onboard computers for digital electronic control. The use of computer for digital electronic control can improve the performance and reliability of the control system, enhance the communication ability between the control system and other systems, and reduce the maintenance cost of the control system. [0003] The onboard computer is the core component of the digital electronic control system. In order to ensure reliability, the airborne computer usually adopts a dual-channel structure, also known as a dual-redundancy system. Among them, one channel is used for calculation and control, and the other channel is used as a hot backup. Once the channel used for calculation and con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14G06F11/16
CPCG06F11/1428G06F11/1629
Inventor 王旭昊王济毛宁赵小勇
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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