Coordination and vibration control for two sets of flexible satellites with input constraints and actuator failures

Abstract

<jats:p> In this study, we considered the coordination and vibration control for two sets of flexible satellite systems with input constraints and actuator failures. The parameters of both systems were kept uniform, and one was called the master flexible satellite, and the other one was called slave flexible satellite. The two sets of the flexible satellite systems were modelled as partial differential equations. Coordination control laws were designed to turn the master flexible satellite system to the desired angle and then turn the slave system to the angle of the master satellite system. Furthermore, the hyperbolic tangent function was adopted to realize the control input constraint. The adaptive control laws were designed to ensure that the systems work normally even when the actuator fails. Lyapunov’s direct method was adopted and stability analysis was given. Finally, numerical simulations were conducted to validate the results. </jats:p>

Observer-based independent joint control for a coupled rigid-flexible manipulator with actuator saturation based on distributed parameter model

“…In this paper, we will focus on designing continuous anti-saturation controllers, in order to avoid the impact of controller discontinuity on the system. Besides, the anti-saturation control research results are all based on boundary control, which not only need joint input to control the joint position, but also need end-point boundary actuator input for the vibration suppression (Liu et al (2018b); Ji et al (2020); Zhang et al (2018)). However, for the flexible mechanical system with a payload at the end point, it is impractical to achieve boundary control by installing an actuator at the distal end of the mechanical arm.…”

Boundary Control of A Flexible Rotatable Manipulator in Three-Dimensional Space With Input Constraints and Actuator Faults

“…A novel adaptive boundary controller for flexible aircraft wing with actuator failure and input constraint is built to eliminate the bending and twist deformations [32]. For two sets of flexible satellites, coordination control is designed to handle with input constraints and actuator failures and fulfill coordinated tracking [33]. Motivated by the above discussions, this study focuses on the boundary control problem of a flexible rotatable manipulator in three-dimensional space with input constraints and actuator faults.…”