Modeling and adaptive control for a spatial flexible spacecraft with unknown actuator failures

Z Liu, Z Han, Z Zhao, W He - Science China Information Sciences, 2021 - Springer
In this paper, we address simultaneous control of a flexible spacecraft's attitude and
vibrations in a three-dimensional space under input disturbances and unknown actuator …

Adaptive neural-network-based fault-tolerant control for a flexible string with composite disturbance observer and input constraints

Z Zhao, Y Ren, C Mu, T Zou… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
We propose an adaptive neural-network-based fault-tolerant control scheme for a flexible
string considering the input constraint, actuator gain fault, and external disturbances. First …

Finite-time convergence disturbance rejection control for a flexible Timoshenko manipulator

Z Zhao, Z Liu - IEEE/CAA Journal of Automatica Sinica, 2020 - ieeexplore.ieee.org
This paper focuses on a new finite-time convergence disturbance rejection control scheme
design for a flexible Timoshenko manipulator subject to extraneous disturbances. To …

Dead zone compensation and adaptive vibration control of uncertain spatial flexible riser systems

Z Zhao, CK Ahn, HX Li - IEEE/ASME Transactions on …, 2020 - ieeexplore.ieee.org
This article provides a framework of dead zone compensation and robust adaptive vibration
control for uncertain spatial flexible riser systems. First, nonsymmetric dead zone …

Asymmetric input–output constraint control of a flexible variable-length rotary crane arm

Y Liu, Y Mei, H Cai, C He, T Liu… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
This article demonstrates the realization of angle tracking and deformation suppression by
develo** two boundary controllers for a flexible variable-length rotary crane arm with …

Robust adaptive fault-tolerant control for a riser-vessel system with input hysteresis and time-varying output constraints

Z Zhao, Y Liu, T Zou, KS Hong… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Recently, with the development of the marine economy, marine risers have garnered
increasing attention as they present facile and reliable methods for oil and gas …

Unifying performance specifications in tracking control of MIMO nonlinear systems with actuation faults

K Zhao, FL Lewis, L Zhao - Automatica, 2023 - Elsevier
Guaranteeing prescribed performance is critical to maintaining system efficiency and
reliability. The state-of-the-art approaches achieve different performance specifications with …

Vibration control for spatial aerial refueling hoses with bounded actuators

Z Liu, X He, Z Zhao, CK Ahn… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
This article presents a control scheme for stabilizing a vibrating flexible hose used for aerial
refueling subject to bounded actuators for the rate and magnitude. A dynamical model of …

Adaptive fault-tolerant boundary control for a flexible string with unknown dead zone and actuator fault

Y Ren, P Zhu, Z Zhao, J Yang… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
This study focuses on an adaptive fault-tolerant boundary control (BC) for a flexible string
(FS) in the presence of unknown external disturbances, dead zone, and actuator fault. To …

Boundary constrained control of flexible string systems subject to disturbances

Z Liu, Z Zhao, CK Ahn - … Transactions on Circuits and Systems II …, 2019 - ieeexplore.ieee.org
This brief concentrates on controller design for flexible string systems subjected to external
disturbances, input constraints, and state constraints. The hyperbolic barrier Lyapunov …