Tri-redundancy switching circuit applicable to aviation electrothermal control system

A control system and switching circuit technology, applied in general control systems, control/regulation systems, program control, etc., can solve problems such as reliability and testability that are difficult to meet requirements

Active Publication Date: 2019-10-18
TIANJIN JINHANG COMP TECH RES INST
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Problems solved by technology

[0002] With the development trend of more electric aircraft, the application of on-board electric heating system is becoming more and more extensive, and its importance is getting hi...

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  • Tri-redundancy switching circuit applicable to aviation electrothermal control system

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Embodiment Construction

[0022] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] Such as figure 1 As shown, the present invention provides a three-redundancy switching circuit applied to the aviation electrothermal control system. The circuit includes three sets of identical circuit modules. The functions of the three circuit modules are identical. At any time, only one set of circuit modules outputs , the remaining two groups of circuit modules are in backup state;

[0024] Each group of circuit modules includes a logic processing circuit, a power supply detection circuit, a relay switching circuit, an optocoupler isolation chip, and a Darlington tube; the logic processing circuit, an optocoupler isolation chip, and a Darlington tube are connected in sequence, and the logic processing circu...

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Abstract

The invention relates to a tri-redundancy switching circuit applicable to an aviation electrothermal control system, and belongs to the technical field of aviation electrothermal control systems. Thecircuit comprises three completely same circuits; each circuit comprises a logic processing circuit, a power supply detection circuit and a relay switching circuit; tri-redundancy design of the aviation electrothermal control system is realized; due to the switching logic, when failing, a current working circuit can be reliably switched to low-priority backup processor output; the fact that the output power supply in a circuit in the three same circuits is switched on at any time can be ensured; the problem that two or three output loop power supplies are switched on can be prevented; furthermore, the switch is switched through a relay; and thus, the problem that a backup circuit cannot perform normal output switching due to the fact that a failed circuit cannot disconnect output can be avoided.

Description

technical field [0001] The invention belongs to the technical field of aviation electrothermal control systems, and in particular relates to a three-redundancy switching circuit applied to aviation electrothermal control systems. Background technique [0002] With the development trend of more electric aircraft, the application of electric heating system on board is becoming more and more extensive, and its importance is getting higher and higher. The traditional electric heating control system mostly adopts single-redundant design, which is difficult to meet the requirements in terms of reliability and testability. . Contents of the invention [0003] (1) Technical problems to be solved [0004] The technical problem to be solved by the present invention is: how to design a three-redundancy switching circuit applied to the aeronautical electrothermal control system, so as to realize the three-redundant design of the aeronautical electrothermal control system. [0005] (...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0423G05B2219/25257
Inventor 仝步升袁盾刘强
Owner TIANJIN JINHANG COMP TECH RES INST
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