Results 21 to 30 of about 1,917,769 (262)

Continuous Fixed-Time Sliding Mode Attitude Controller Design for Rigid-Body Spacecraft

IEEE Access, 2020
Fast and high-precision attitude control for the rigid spacecraft is important for its broad applications in astronautics. In this paper, we address this problem via continuous nonsingular fixed-time sliding mode control approach.
Lei Wang, Zhuoyue Song
doaj   +1 more source

Prespecifiable fixed‐time control for uncertain nonlinear system with input quantization

IET Control Theory & Applications, 2023
This paper focuses on the global prespecifiable fixed‐time control problem of uncertain strict‐feedback nonlinear system with input quantization. In contrast to the existing fixed‐time control results, the signs of the control gains can be unknown in our
Yang Gao, Jiali Ma, Qingwei Chen, Yifei Wu, Chen Qian   +4 more
doaj   +1 more source

Fixed‐time attitude tracking control for rigid spacecraft

IET Control Theory & Applications, 2020
This study addresses the fixed‐time attitude tracking for rigid spacecraft with inertia uncertainties and external disturbances. Firstly, a new fixed‐time sliding surface based on the bi‐limit homogeneous theory is proposed. Secondly, a non‐singular sliding mode control is designed to solve the robust fixed‐time attitude tracking problem.
Zeng Wang, Yuxin Su, Liyin Zhang
openaire   +3 more sources

Robust Fixed-Time Stability: Application to Sliding-Mode Control [PDF]

IEEE Transactions on Automatic Control, 2022
This article deals with robust fixed-time stability and stabilization. First, new global robust fixed-time stability results are proposed for scalar systems by using constant and variable exponent coefficients. Then, they are applied to global robust fixed-time stabilization of a class of uncertain nonlinear second order systems by using sliding mode ...
Emmanuel Moulay, Vincent Léchappé, Emmanuel Bernuau, Franck Plestan   +3 more
openaire   +3 more sources

A Robust Fixed-Time Sliding Mode Control for Quadrotor UAV

Algorithms, 2023
This paper proposes a robust algorithm based on a fixed-time sliding mode controller (FTSMC) for a Quadrotor aircraft. This approach is based on Lyapunov theory, which guarantees system stability.
Jairo Olguin-Roque, Sergio Salazar, Iván González-Hernandez, Rogelio Lozano   +3 more
doaj   +1 more source

Fixed-Time Trajectory Tracking Control of Fully Actuated Unmanned Surface Vessels with Error Constraints

Journal of Marine Science and Engineering
This paper proposes a fixed-time prescribed performance control technique to address the challenge of precise trajectory tracking control for unmanned surface vessels (USVs) in the presence of external time-varying disturbances and input saturation.
Bowen Sui, Jianqiang Zhang, Zhong Liu, Junbao Wei   +3 more
doaj   +1 more source

Fixed-Time Parameter Adaptation for Safe Control Synthesis

CoRR, 2022
This paper introduces a parameter adaptation-based control law for a class of nonlinear, control-affine, safety-critical systems subject to additive, parameter-affine model uncertainty. It is shown that the uncertainty is learned in fixed-time, i.e., within a finite time independent of the initial parameter estimates, without requiring persistence of ...
Mitchell Black 0001, Ehsan Arabi, Dimitra Panagou   +2 more
openaire   +2 more sources

Fixed‐time fault‐tolerance attitude tracking control for spacecraft without unwinding

IET Control Theory & Applications, 2023
In this paper, the attitude tracking control problem is investigated for rigid spacecraft subjected to external disturbance, inertia uncertainties, and actuator faults. The rotation matrix is used to model the spacecraft attitude control system which can
Q. Huang, Y. Zhang
doaj   +1 more source

Fixed-Time Homogeneous Integral Controller

IFAC-PapersOnLine, 2018
Abstract We propose a homogeneous integral controller with positive homogeneity degree, for systems with relative degree two and three. Its design and the convergence proof is achieved by the construction of an explicit homogenous Lyapunov function. A combination of this controller, with a discontinuous one developed by the authors in a previous work,
Angel Mercado-Uribe, Jaime A. Moreno
openaire   +1 more source

Fixed-time input-to-state stability and applications to fixed-time sliding mode control

International Journal of Control
This paper investigates the robust stability properties of two simple fixed-time stabilizing controls tailored for scalar systems. These algorithms require a small amount of tuning parameter providing fixed-time stability, and ensuring trajectory robustness against disturbances and/or measurement noise.
Labbadi, Moussa, Efimov, Denis
openaire   +2 more sources