Variable-structure PD controller for satellite attitude: Stability analysis and design for optimal performance

Abdallah Alansaari, Igor Boiko, Sean Swei

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A novel variable structure controller is investigated for satellite attitude control. This novel controller does not lead to a sliding mode, which avoids the chattering problem, making it suitable for practical implementation. Detailed formulation of the controller is presented along with analytical stability analysis for a second order system. The system having this nonlinear controller is homogeneous, which leads to a similar response at large and small deviations from the equilibrium. A procedure for tuning homogeneous controllers for all initial conditions is proposed. A detailed model of the satellite attitude dynamics, actuator dynamics, and delays in the system is utilized to optimize controller gains numerically. A comparative analysis shows the superiority of the proposed controller over a conventional PID controller in terms of better transients and lower energy consumption.

    Original languageBritish English
    Pages (from-to)9728-9753
    Number of pages26
    JournalJournal of the Franklin Institute
    Volume360
    Issue number13
    DOIs
    StatePublished - Sep 2023

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