Dynamic modeling and vibration control of a large flexible space truss

Liu, Mei; Cao, Dengqing; Li, Jipeng; Zhang, Xiaoyun; Jin, Wu

doi:10.1007/s11012-022-01487-8

Cited by 18 publications

(6 citation statements)

References 34 publications

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“…Here x i is input, w ij is the weight of input layer, w j is the weight of hidden layer, O j is output of hidden layer. The output of whole network can be written as formula (1). In this paper, the hidden layer chooses sigmoid function, so the output of the hidden layer can be expressed as formula (2).…”

Section: "Source-based Vibration Control" Strategymentioning

confidence: 99%

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Experimental Study of Active Vibration Control for Flexible Truss by Using a Stewart Platform Manipulator

Luo,

Yu,

Feng

et al. 2024

Advances in Transdisciplinary Engineering

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Experiments of active vibration control for flexible truss are studied, with a Stewart platform manipulator (SPM) employed as an active device at the bottom of the truss. A back-propagation neural network is designed to identity the controlled object. And on the basis of the identification model, this work constructs a neural network adaptive inverse controller (NNAIC). Then based on the dSPACE real-time simulation system, the control test system for the truss is built, on which the neural network adaptive inverse control experiments are carried out. The vibration amplitude decreases more than 93.8% and 89.6% with the structure continuously being excited at the first-order and second-order resonant frequency respectively. The results indicate the effectiveness of the control conducted by using SPM, and NNAIC has a good performance.

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Section: "Source-based Vibration Control" Strategymentioning

confidence: 99%

“…Vibration control for large flexible space truss structure is a challenging work in the field of aerospace dynamics and control. Large flexible space structure is being widely used in astronautic purpose since it has a lot of advantages as lightweight, reliable, simple and adaptable for tasks etc [1].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Active Vibration Control for Flexible Truss by Using a Stewart Platform Manipulator

Luo,

Yu,

Feng

et al. 2024

Advances in Transdisciplinary Engineering

View full text Add to dashboard Cite

show abstract

“…Also, Ref. [9] investigates dynamic modeling and vibration control for a large flexible space truss. The space truss is a typical periodic triangular prism structure consisting of beams and rods.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Q and R Matrices with Genetic Algorithms to Reduce Oscillations in a Rotary Flexible Link System

Saldaña Enderica,

Llata,

Torre-Ferrero

2024

Robotics

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Automatic control of robots with flexible links has been a pivotal subject in control engineering and robotics due to the challenges posed by vibrations during repetitive movements. These vibrations affect the system’s performance and accuracy, potentially causing errors, wear, and failures. LQR control is a common technique for vibration control, but determining the optimal weight matrices [Q] and [R] is a complex and crucial task. This paper proposes a methodology based on genetic algorithms to define the [Q] and [R] matrices according to design requirements. MATLAB and Simulink, along with data provided by Quanser, will be used to model and evaluate the performance of the proposed approach. The process will include testing and iterative adjustments to optimize performance. The work aims to improve the control of robots with flexible links, offering a methodology that allows for the design of LQR control under the design requirements of controllers used in classical control through the use of genetic algorithms.

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“…The works in ref. [32] discretized the continuum model using the Galerkin method and limited consideration to the first three bending modes in LQR controller design. Both refs.…”

Section: Introductionmentioning

confidence: 99%

“…Both refs. [31,32] involved the discretization of the continuum model and distributed actuators were used for vibration control. In this present work, we delve into the boundary controller design of a satellite featuring a large truss structure, exclusively relying on the continuum model without any discretization or reduction.…”

Section: Introductionmentioning

confidence: 99%

Continuum Modeling and Boundary Control of a Satellite with a Large Space Truss Structure

Cao,

Yang,

Liu

2024

Aerospace

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Due to its advantages of easy deployment and high stiffness-to-mass ratio, the utilization of truss structures for constructing large satellites presents an appealing solution for modern space missions, including Earth observation and astronomy. However, the dimensions of the traditional finite element model for a satellite with a large space truss structure become exceedingly large as the structure’s size increases. The control system design process based on the finite element model is complex and time-consuming. This paper employs the continuum modeling method to represent the truss structure as a continuous entity. The bending vibrations of the truss structure are encapsulated by a simplified partial differential equation (PDE), as opposed to the more intricate traditional finite element model. Simultaneously, the satellite’s attitude motion is characterized by an ordinary differential equation (ODE). Building upon this coupled PDE-ODE model, a boundary control law that only requires sensors/actuators at the boundary is formulated to effectively mitigate structural vibrations and regulate the satellite’s attitude. The exponential stability of this closed-loop system is scrutinized using Lyapunov’s direct method. The simulation results affirm that the continuum modeling method is indeed well-suited for satellites endowed with substantial truss structures, and the proposed boundary law proves to be highly effective in both attitude tracking and vibration suppression.

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Dynamic modeling and vibration control of a large flexible space truss

Cited by 18 publications

References 34 publications

Experimental Study of Active Vibration Control for Flexible Truss by Using a Stewart Platform Manipulator

Experimental Study of Active Vibration Control for Flexible Truss by Using a Stewart Platform Manipulator

Optimization of Q and R Matrices with Genetic Algorithms to Reduce Oscillations in a Rotary Flexible Link System

Continuum Modeling and Boundary Control of a Satellite with a Large Space Truss Structure

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