Method for selecting control instruction of flight control computer

By adding communication lines between adjacent secondary computers in the flight control system, the problem of rudder force oscillation caused by the secondary computer entering the downgrade mode is solved, and the stable control of the aircraft and the automatic landing capability of CAT IIIb are realized.

CN120406415APending Publication Date: 2025-08-01COMMERCIAL AIRCRAFT CORP OF CHINA LTD +1
5 Cites 2 Cited by

Patent Information

Application Number
CN202510466437.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-14
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

After the computer enters the downgrade mode of the existing flight control system, the flight control system enters the hybrid mode, causing disputes in the rudder surface force oscillation, affecting the aircraft's handling performance and safety, and failing to meet the requirements of CAT IIIb automatic landing.

Method used

Increase communication lines between adjacent secondary computers, and pass the working mode status amounts between the secondary computers and select control instructions according to the working mode of the adjacent secondary computers to avoid the output of mixed mode instructions, ensuring that the back-end actuator is not actively controlled in the downgrade mode.

Benefits of technology

It avoids the flight control system entering hybrid working mode, improves the aircraft handling performance, supports CAT IIIb automatic landing function, and reduces the impact of the fatigue life of the rudder surface.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to a method for selecting flight control computer control instructions. The method includes: computing a degraded mode control instruction by a degraded mode link of a secondary computer; receiving an indication signal of an operating mode of a secondary computer adjacent to the secondary computer, wherein the indication signal is received through a communication line arranged between the adjacent secondary computer and the secondary computer and used for transmitting an operating mode state quantity; and if the neighboring secondary computer is in a normal mode, the degraded mode link of the secondary computer selects a default security instruction as a degraded mode link instruction, otherwise the degraded mode link of the secondary computer selects the degraded mode control instruction as a degraded mode link instruction.
Need to check novelty before this filing date? Find Prior Art