A dual-channel over-rotation protection parking system and its parking method

Abstract

The invention discloses a double-channel excess revolution protecting shutdown system which comprises two channels, at least one shutdown electromagnetic valve control circuit, two software control modules for collecting and judging a rotating speed signal and two or gates; the two channels are same in structure and comprise rotating speed sensors and excess revolution protecting devices, and the output ends of the rotating speed sensors are connected to the input ends of the excess revolution protecting devices; each of the shutdown electromagnetic valve control circuits comprises a shutdown electromagnetic valve coil and two switches connected thereto in series. The invention also provides a excess revolution protecting shutdown method which comprises the following steps of: collecting a rotating speed signal by using an independent excess revolution protecting device and an independent rotating speed sensor on each of the channels and judging excess revolution and outputting a shutdown signal; and additionally arranging an electronic controller software control module on each of the channels to collecting the rotating signal, and judging excess revolution and outputting the shutdown signal. The double-channel excess revolution protecting shutdown device is combined with the software control module to jointly achieve an excess revolution protecting shutdown function, so that the excess revolution protecting function reliability is high, the mistaken shutdown probability is small, and the system and method have obvious advantages.

Description

technical field [0001] The invention relates to an aeroengine control system, and more particularly, to a dual-channel over-rotation protection parking system and a parking method thereof. Background technique [0002] Aeroengine rotor over-rotation is a very dangerous state, and corresponding protection devices must be designed to prevent over-rotation from causing harm to the engine. The over-rotation protection function is realized by the engine control system. The system's over-rotation protection system performs a parking action to stop the engine. [0003] The existing advanced engine control system generally adopts full authority digital electronic control (FADEC), using a dual-channel electronic controller, and the control function is realized by hardware and software. Generally, similar redundancy is used, and the structure and function of the two channels are consistent. When a channel fails, it can quickly and smoothly switch to another channel to improve the rel...

AI Technical Summary

Problems solved by technology

[0005] The existing technology uses a dual-channel independent over-rotation protection device. Only when the two protection circuits generate protection stop signals, the over-rotation protection action is executed, which reduces the probability of accidental parking. However, as long as one over-rotation protection circuit fails, the The entire over-rotation protection function fails, and the reliability is low; in another solution, when any one of the protection circuits generates a protection stop signal, the over-rotation protection action is executed. The failure probability of the over-rotation protection function is low, but as long as one of the over-rotation protection circuits generates If there is a wrong stop signal, there will be a wrong stop failure, and the probability of a wrong stop is high

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