Fault Estimation and Accommodation of Interconnected Systems: A Separation Principle
IEEE Transactions on Cybernetics
|August 7, 2018
Summary
This study introduces new principles for fault estimation and accommodation in interconnected systems, enabling separate designs for subsystems. These methods ensure system recoverability and enable distributed or decentralized fault-tolerant control strategies.
Area of Science:
- Control Systems Engineering
- Networked Systems Analysis
- Aerospace Engineering
Background:
- Interconnected systems face challenges in fault estimation and accommodation due to complex interactions.
- Existing methods often lack the flexibility for separate subsystem design in fault-tolerant control.
Purpose of the Study:
- To develop novel principles for fault estimation (FE) and accommodation in interconnected systems.
- To enable independent design of diagnostic observers and fault-tolerant controllers for each subsystem.
- To establish a framework for distributed and decentralized fault-tolerant control of interconnected systems.
Main Methods:
- Introduction of the interconnected separation principle and constrained interconnected separation principle.
- Development of fault recoverability conditions.
- Design of distributed and decentralized fault estimation and accommodation schemes.
Main Results:
- The proposed principles allow for separate design of diagnostic observers and fault-tolerant controllers within and between subsystems.
- Sufficient fault recoverability conditions were established.
- Effective distributed and decentralized FE and accommodation schemes were provided.
Conclusions:
- The new principles offer a robust framework for observer-based fault diagnosis and fault-tolerant control in interconnected systems.
- The methodology was successfully applied to a meta-aircraft configuration, demonstrating its practical efficiency.
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