A distributed adaptive fault-tolerant control method and system for nonlinear inline systems

By constructing a local objective function and error optimizer using a dynamic high-gain method, and designing an auxiliary system and control law, the impact of actuator failure on system output in a nonlinear inline system is resolved. Asymptotic tracking and stability under uncertain conditions are achieved, and computational complexity is reduced.

CN118483905BActive Publication Date: 2026-05-26BEIHANG UNIV
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Patent Information

Application Number
CN202410548724.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-05-06
Publication Date
2026-05-26
Estimated Expiration
2044-05-06

AI Technical Summary

Technical Problem

In existing distributed control technologies for nonlinear inline systems, the impact of actuator failures on system output performance has not been fully optimized, and many studies require the first derivative of the reference output signal to be known, making it difficult to apply to engineering systems and presenting complexity issues.

Method used

A local objective function, error optimizer, auxiliary system, and control law are constructed using a dynamic high-gain approach to generate the optimal error trajectory. The error optimizer is designed to adapt to uncertain parameters and actuator faults. Asymptotic tracking is achieved by tracking the fault-tolerant controller through the auxiliary system.

Benefits of technology

Without requiring known derivatives of the output trajectory, it effectively compensates for actuator failures and unknown strong internal coupling effects, achieving system stability and asymptotic tracking of the output signal while reducing computational complexity.

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Abstract

This invention discloses a distributed adaptive fault-tolerant control method and system for nonlinear inline systems, relating to the field of distributed control technology for nonlinear inline systems. The method includes: for each subsystem in the nonlinear inline system, constructing the actual output of each actuator in the subsystem based on the fault type of the actuator; the nonlinear inline system includes several subsystems; for each subsystem, constructing a local objective function, an error optimizer, an auxiliary system, high-gain parameters, and a control law, and generating an optimal error trajectory based on the local objective function and the error optimizer. At the upper level, this invention designs an error optimizer to generate the optimal error trajectory based on a local objective function that converges to zero; at the lower level, it designs a trajectory tracking fault-tolerant controller with the help of an auxiliary system, employing a dynamic high-gain approach to adaptively handle the effects of uncertain parameters, actuator faults, and unknown strong inline coupling.
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