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Event-Driven Control for Networked Control Systems With Quantization and Markov Packet Losses.

Hongjiu Yang, Yang Xu, Jinhui Zhang

    IEEE Transactions on Cybernetics
    |June 1, 2016
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an event-driven approach for networked control systems (NCS) facing quantization and packet losses. The proposed method ensures system stability using a discrete event-detector and a feedback controller, validated with an inverted pendulum model.

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    Area of Science:

    • Control Systems Engineering
    • Networked Control Systems (NCS)
    • System Stability Analysis

    Background:

    • Networked control systems (NCS) are susceptible to performance degradation due to quantization and data packet losses.
    • Event-driven control strategies offer potential advantages in NCS by reducing communication load and improving efficiency.
    • Existing NCS stability analyses often do not fully account for combined effects of arbitrary quantization and probabilistic packet losses.

    Purpose of the Study:

    • To develop and analyze an event-driven control strategy for NCS subject to quantization and packet losses.
    • To guarantee the mean square stability of the closed-loop NCS under the specified uncertainties.
    • To design a feedback controller that ensures the stabilization of the NCS.

    Main Methods:

    • Utilizing a discrete event-detector to monitor system events.
    • Incorporating an arbitrary region quantizer and Markov jump packet loss models.
    • Applying zoom strategy and Lyapunov theory for stability analysis.
    • Designing a feedback controller for system stabilization.

    Main Results:

    • A complete proof guarantees the mean square stability of the closed-loop event-driven NCS.
    • The proposed event-driven controller effectively stabilizes the system despite quantization and packet losses.
    • The effectiveness of the approach is demonstrated through simulations on an inverted pendulum model.

    Conclusions:

    • The event-driven approach is effective for stabilizing NCS with quantization and packet losses.
    • The combination of discrete event-detection, zoom strategy, and Lyapunov theory provides robust stability guarantees.
    • The proposed method offers a practical solution for enhancing the reliability of NCS in real-world applications.