Dynamics and control of a smart flexible satellite moving in an orbit

Azadi, Mohammad; Eghtesad, Mohammad; Fazelzadeh, S. Ahmad; Azadi, Emad

doi:10.1007/s11044-014-9447-2

Cited by 36 publications

(14 citation statements)

References 33 publications

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“…Considering the fact that real mechanical systems always contain a certain level of flexibility, controller design and verification based on solely rigid model of a system may not lead to similar performance in real applications. Thus, the control problem of vibrational systems has become of great interest in recent studies 1–18 . These investigations are generally categorized into analytical and numerical approaches.…”

Section: Introductionmentioning

confidence: 99%

“…Another group is devoted to the problem of suppressing vibrations in continuum mechanics systems 5 . These researches are categorized into active vibration attenuation 6–10 using piezoelectric actuators or passive approaches through damping solutions like viscoelastic pads 11 or dampers 12 . In active vibration suppression, stationary systems like supported cantilever beams or shells 13 are generally utilized for closed‐loop performance evaluation.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al 8 focused their investigations on vibration suppression of flexible links rather than reference tracking of a mobile parallel mechanism via adaptive sliding mode approach. A few studies are also conducted supporting the idea of system control in presence of vibrations with reference tracking as main objective, 7–9 which is similarly followed in this paper. In these studies, the main challenge is to develop a robust control algorithm capable of both tracking reference values and maintaining system stability in presence of model uncertainties.…”

Section: Introductionmentioning

confidence: 99%

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Controlling uncertain nonlinear structural vibrations of moving continuum system by embedding a vibration monitoring unit to feedback algorithm

Homaeinezhad

FotoohiNia

2020

Struct Control Health Monit

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This paper proposes a practical solution to control a problem of a class of continuum mechanics systems in which spatial equations corresponding to vibrational motions are not resolvable through conventional analytical approaches. Control scheme is constructed based on discrete sliding mode technique regarding a rigid model of a system such that control inputs are selected between Lyapunov stability bounds to manipulate the system in tracking reference values. The stability bounds and control input signal proximity to either bounds are updated in every simulation step in accordance to system vibration level using a practical acceleration synchronization method aside from evolution of rigid model states. To this end, the severity of vibrations is analyzed online using a limited number of acceleration sensors. These sensors are installed on critical nodes that are generally characterized with high level of vibrations, and the synchronization process is employed through comparative analysis with other nodes of which exhibit more rigidity within the structure. In order to highlight controller performance, virtual plant is assumed to be constructed from viscoelastic materials (VEMs) featuring timevarying elasticity and viscosity, and Prony series parameters are involved in modeling VEMs in ANSYS ® mechanical APDL student edition. Eventually, controller capability in stabilization of closed-loop system and tracking reference values are evaluated in finite element analysis transient environment, and simulation results are compared with those of existing methods.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Controlling uncertain nonlinear structural vibrations of moving continuum system by embedding a vibration monitoring unit to feedback algorithm

Homaeinezhad

FotoohiNia

2020

Struct Control Health Monit

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“…However, as mentioned above, the coupling effect will result in unwanted perturbation of the orientation of the satellite, which will definitely deteriorate the attitude pointing accuracy and thus poses difficulties and challenges for the attitude control of the rigid-flexible coupling satellites. [3][4][5][6] In an endeavor to improve the attitude control of the rigid-flexible coupling satellite, some literatures proposed different methods. [7][8][9][10][11][12][13][14][15] However, most of the literature do not consider satellite faults when proposed to handle the attitude control of the rigidflexible coupling satellite.…”

Section: Introductionmentioning

confidence: 99%

Finite time fault-tolerant attitude control for rigid-flexible coupling satellites based on Legendre neural network

Xiao

Sun

2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper investigates the finite time fault-tolerant attitude control for rigid-flexible coupling satellites in large angle rapid maneuver when some of the actuators are in the fault condition. Based on the first-order approximate method, a more accurate dynamic model for rigid-flexible coupling satellites is set up. Then, Legendre polynomial-based neural network is introduced to estimate the lump perturbation including the estimation error of the fault control torque, high-order flexible coupling terms, external disturbances, and model uncertainties. With the estimation value as the compensation effort, a finite time fault-tolerant attitude controller is designed based on the nonsingular fast terminal sliding mode. And in order to guarantee that the output of the Legendre polynomial-based neural network stays inside the bound of the lump perturbation, a switch mechanism is introduced to generate a switching between the proposed fault-tolerant attitude controller and a robust controller. The proposed fault-tolerant attitude controller is shown to have the finite time stability, with fast convergence rate, high accuracy, disturbance rejection, chattering attenuation, flexible vibration damping through theoretical analysis and simulations, meanwhile the better representation capability of the Legendre polynomial-based neural network, whose basic functions are implemented using only the desired attitude, makes the controller design simple and efficient.

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“…In the past, active vibration control was often proposed for large space systems with the necessity to design space structures with distributed actuators and sensors. In these cases, the resulting smart structure is capable of measuring an augmented state of the system, including modal displacements and velocities, in order to effectively damp out the undesired vibrations, as in the work of Azadi [1]. Similarly, the possibility to have a dynamic vibration compensation that uses only attitude and angular velocity measures as sensors and piezoelectric patches as actuators was proposed by Di Gennaro [2].…”

mentioning

confidence: 99%

Integrated vibration suppression attitude control for flexible spacecrafts with internal liquid sloshing

Colagrossi

Lavagna

2020

Multibody Syst Dyn

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Vibration suppression during attitude control is a fundamental research topic whenever control of the rotational motion of a spacecraft with flexible appendages and internal liquid sloshing is of interest. The proposed method is based on an attitude control system with centralized sensors and actuators, without the usage of collocated devices for vibration management. In this way, it is possible to develop and implement a computationally efficient real-time control system that is suitable for any kind of spacecraft, even with advanced control capabilities. An integrated vibration suppression attitude control is designed and analyzed, exploiting also a numerical simulation verification procedure based on validated code. The developed attitude control system applies two fundamental control schemes: classical proportional-derivative (PD) control, with nonadaptive band-stop filters, and wave-based control. The proposed wave-based control implementation allows managing three-dimensional attitude dynamics in steady state pointing, without cross-coupling between the separate body axes. To overcome this limitation, the paper presents the integration of the wave-based control with the filtered PD control scheme, allowing us to have a complete three-dimensional real-time MIMO controller, with vibration suppression capabilities and robustness to system uncertainties. The paper also presents the development of an accurate dynamical model of a generic flexible spacecraft with internal liquid sloshing based on a multibody formulation. Keywords Flexible spacecrafts • Internal liquid sloshing • Vibration suppression • PD attitude control • Wave-based attitude control 1 Introduction Vibration suppression during attitude control of flexible spacecrafts with internal liquid sloshing is an active research topic intriguing the space engineering community for many B A. Colagrossi

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Dynamics and control of a smart flexible satellite moving in an orbit

Cited by 36 publications

References 33 publications

Controlling uncertain nonlinear structural vibrations of moving continuum system by embedding a vibration monitoring unit to feedback algorithm

Controlling uncertain nonlinear structural vibrations of moving continuum system by embedding a vibration monitoring unit to feedback algorithm

Finite time fault-tolerant attitude control for rigid-flexible coupling satellites based on Legendre neural network

Integrated vibration suppression attitude control for flexible spacecrafts with internal liquid sloshing

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