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H_∞ Static Output Feedback for Low-Frequency Networked Control Systems With a Decentralized Event-Triggered Scheme.

Hongjiu Yang, Peng Li, Yuanqing Xia

IEEE Transactions on Cybernetics

|March 21, 2019

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This study introduces a decentralized event-triggered scheme (DETS) for low-frequency networked control systems (NCS). The proposed H∞ static output feedback controller reduces network load while ensuring system stability and performance.

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Area of Science:

Control Systems Engineering
Networked Control Systems
Robust Control Theory

Background:

Networked Control Systems (NCS) face challenges like network-induced delays and data packet loss.
Optimizing communication load is crucial for efficient NCS operation.
Static output feedback controllers offer simplicity but require careful design for performance.

Purpose of the Study:

To develop an H∞ static output feedback controller for low-frequency NCS.
To reduce network communication loads using a decentralized event-triggered scheme (DETS).
To analyze and design controllers for time-delay systems with low-frequency constraints.

Main Methods:

Modeling the NCS with DETS as a time-delay system with low-frequency constraints.
Applying Integral Quadratic Constraint (IQC) and generalized Kalman-Yakubovich-Popov (KYP) lemma for H∞ performance analysis.
Developing a two-stage algorithm for H∞ static output feedback controller design.

Main Results:

The proposed DETS effectively reduces network communication loads in LF NCS.
The H∞ performance analysis framework is established using IQC and generalized KYP lemma.
A computational algorithm is presented for designing the H∞ static output feedback controller.

Conclusions:

The developed H∞ static output feedback controller with DETS is effective for LF NCS.
The proposed method offers superior performance and reduced network load compared to existing techniques.
The study provides a robust framework for designing controllers for NCS with communication constraints.