Observer-Based Fuzzy Sliding Mode Attitude Control for Flexible Spacecraft

Machine learning-based data-driven approaches have greatly improved system identification capabilities and facilitated the application of model-based control algorithms. However, techniques such as neural networks require significant amounts of training data and have limited generalization capabilities. To overcome this problem, we employ the sparse identification of nonlinear dynamics with control (SINDYc) for system identification, which considers both system states and control inputs. Based on the identified system, we design the controller using the backstepping control method. In order to make the algorithm more practical in real-world scenarios, we introduce an input saturation compensation system into the controller design. Additionally, we apply a command filter into the method to avoid deriving a virtual control signal and reduce the computational complexity of the controller. Through stability analysis, the proposed control algorithm ensures that the tracking error in the system is bounded. Finally, we verify the effectiveness of the proposed SINDYc-Backstepping framework by conducting simulations using a single-link robot arm.

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Smooth Time-Varying Feedback Control of Nonholonomic Systems with Applications to the Attitude Control of Underactuated Spacecraft

Zhou,

Zhang

2024

Guid. Navigat. Control

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This paper studies the control of chained nonholonomic systems by using smooth time-varying feedback. First, by using a time-varying state transformation, the chained nonholonomic system is transformed into a linear time-varying system. Second, with the aid of some properties of a class of parametric Lyapunov equations and time-varying systems theory, smooth time-varying state feedback controller is developed to ensure the exponential convergence of both the system states and controls. Different from existing results, the design parameters in the proposed control strategy are independent of the initial conditions of the system. Third, as an application of the proposed smooth time-varying feedback, the attitude control problem for underactuated axisymmetric spacecraft is addressed. Finally, a numerical simulation is presented to validate the effectiveness of the proposed method.

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Observer-Based Fuzzy Sliding Mode Attitude Control for Flexible Spacecraft

Cited by 3 publications

References 12 publications

Distributed Robust Learning Control for Multiple Unmanned Surface Vessels With Fixed-Time Prescribed Performance

Distributed Robust Learning Control for Multiple Unmanned Surface Vessels With Fixed-Time Prescribed Performance

Adaptive Tracking Control for Unknown Dynamics Systems with SINDYc-based Sparse Identification

Smooth Time-Varying Feedback Control of Nonholonomic Systems with Applications to the Attitude Control of Underactuated Spacecraft

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