@article{Tao2019, 
author = {Jiawei Tao and Tao Zhang and Yongfang Nie},
title = {Adaptive Prescribed Performance Control for Flexible Spacecraft with Input Saturation and Actuator Misalignment},
year = {2019},
journal = {Tsinghua Science and Technology},
volume = {24},
number = {6},
pages = {694-705},
keywords = {flexible spacecraft, modal observer, vibration suppression, prescribed performance, input saturation, actuator misalignment},
url = {https://www.sciopen.com/article/10.26599/TST.2018.9010094},
doi = {10.26599/TST.2018.9010094},
abstract = {In this paper, a flexible spacecraft attitude control scheme that guarantees vibration suppression and prescribed performance on transient-state behavior is proposed. Here, parametric uncertainty, external disturbance, unmeasured elastic vibration, actuator saturation, and even configuration misalignment are considered. To guarantee prescribed performance bounds on the transient- and steady-state control errors, a performance constrained control law is formulated with an error transformed function. An elastic modal observer is employed to estimate the unmeasured flexible modal variables, and a command filter is adopted to avoid the tedious analytical computations of time derivatives of virtual control inherent in the control design. Subsequently, a novel auxiliary system is developed to compensate the adverse effects of the actuator saturation constraints, and a compensation term is integrated into the control law to tackle the configuration misalignment. A comparative simulation study is carried out to illustrate the effectiveness and advantages of the proposed approach.}
}