An aircraft system dynamic memory event-triggered fault-tolerant control method based on an intermediate observer

By adopting a dynamic memory event triggering strategy based on intermediate observers, the problems of fault estimation and communication resource waste in aircraft systems are solved, achieving efficient fault detection and fault-tolerant control, and improving the stability and reliability of the system.

CN118034346BActive Publication Date: 2026-06-19NANJING TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING TECH UNIV
Filing Date
2024-03-12
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing technologies struggle to effectively estimate faults and perform fault-tolerant control in aircraft systems, especially when communication resources are limited, and event-triggered control suffers from network latency and data packet waste.

Method used

A dynamic memory event triggering strategy based on intermediate observers is adopted. Combining proportional-integral intermediate observers and dynamic memory event triggering mechanisms, a Markov model of the aircraft system is designed. The state and faults are estimated through modality-dependent intermediate observers, and the communication transmission frequency is dynamically adjusted to reduce resource waste.

Benefits of technology

It improves fault estimation accuracy and fault-tolerant control performance, reduces the use of communication resources, overcomes the effects of deception attacks and actuator failures, and achieves stochastic bounded stability of the system.

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Abstract

This invention discloses a dynamic memory event-triggered fault-tolerant control method for aircraft systems based on an intermediate observer. The method first establishes a Markov model of the aircraft system based on Markov jump system theory, considering a system model with a general transition rate. Next, a mode-dependent proportional-integral intermediate observer is designed to estimate the system state and actuator faults. A dynamic memory event triggering mechanism is then designed to reduce communication transmission frequency. Compared with existing memory event triggering schemes, this scheme can dynamically adjust the length of the memory buffer and introduces a threshold function and an internal dynamic factor, which can automatically adjust according to the triggering error. Finally, a memory event-triggered fault-tolerant controller based on reconstructed state and fault estimation is used to control an aircraft system. When applied to aircraft systems, this method improves the accuracy of state and fault estimation, ensuring the normal operation of the system under deception attacks and actuator faults.
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