Active damping enhancement of flexible intelligent truss structures

Zhang, Lingmi; Liu, Fuqaing

doi:10.1117/12.388843

Cited by 5 publications

(3 citation statements)

References 0 publications

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“…and assuming (12) then, ẋ = λφ R e λt . Here the combined with expression (11), matrix Ψ R can be written as (13) where (14) Since M a , C a , and K a of the active structure are asymmetrical matrices, the structure system denoted by equation 7bis also asymmetrical, then the transposed system of equation 7bis a different one. Similar to equation 9, its eigenvalue problem is given by (15) where ψ L is an eigenvector of the transposed system (λA + B) T .…”

Section: Consideringmentioning

confidence: 99%

Model Analysis of Active Framed Structure

Yan

Gong

Rong

2010

Journal of Low Frequency Noise, Vibration and Active Control

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This paper is concerned with modal analysis of an active framed structure by means of complex mode method. Theoretical and numerical results show that left mode shapes and right mode shapes of the active framed structure take on orthogonality with regard to structural parameter matrices. Also, left mode and right mode shapes have different physical meanings: right mode shape is the actual mode shape related to displacement, but the left mode shape is only a participant mode of external excitation, in other words, which characterizes the disturbed factor of external excitation for the active framed structure. The mode of the active structure is a primary indicator of the structural properties, and also is a target function of structural design, so mode study of the active structure is valuable in theory and practice. Finally, a numerical example is adopted to verify the above conclusions.

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Section: Consideringmentioning

confidence: 99%

Model Analysis of Active Framed Structure

Yan

Gong

Rong

2010

Journal of Low Frequency Noise, Vibration and Active Control

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“…In the literature, integral force control [4,6,7], robust control [11], linear quadratic Gaussian (LQG) control [3], adaptive control [12], the H 1 technique [13] and neural network control [14] have been reported for active vibration suppression of truss-like structures. Among these methods, integral force control has the advantages of inherent stability [6,7], easy implementation and high efficiency [6].…”

Section: Control System Designmentioning

confidence: 99%

Active vibration control of a space truss using a lead zirconate titanate stack actuator

Song

Vlattas

Johnson

et al. 2001

Proceedings of the Institution of Mechanical Engineers, Part G:

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This paper presents design, implementation and experimental results of active vibration control of Naval Postgraduate School (NPS) space truss using a piezoelectric ceramic stack actuator. The NPS space truss represents a flexible spacecraft structure that may support interferometer, antenna and other vibration-sensitive instrumentation. To simulate the effects of a spacecraft disturbance on the truss, a proof mass actuator is incorporated on the structure to excite the truss. To reduce the vibrations caused by the proof mass actuator, an active strut member is installed along a diagonal of the base bay of the truss. The active strut element consists of a piezoelectric ceramic actuator stack, a force transducer and mechanical interfaces. An integral plus double-integral force controller is designed to suppress vibration of the truss. Experimental results demonstrate that the active piezoceramic strut actuator can effectively reduce truss vibration.

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“…Tang [3] conducted the aerodynamic characteristics test of the ribbon stabilized grenade, and the results showed that increasing the length and width of the ribbon would enhance the stability effect, but the too-long ribbon would lead to the twisting and oscillation of the ribbon, which could not obtain reliable stability moment. Zhang [4][5][6] established the engineering calculation formula of an aerodynamic force of the ribbon grenade based on experiment and theoretical analysis and proposed the design principle of a flexible ribbon stabilizer. Sun et al [7][8][9] studied the fluid-structure interaction process of flexible flags through wind tunnel experiments.…”

Section: Introductionmentioning

confidence: 99%

Fluid-structure Interaction Study on Drag Characteristics of Flexible Ribbon

Tan,

Ruan

2023

J. Phys.: Conf. Ser.

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The flexible ribbon can be used as a projectile stabilizing device to provide a stable moment for the projectile, and the research on its drag characteristics is of great significance. This paper uses the arbitrary Lagrange-Euler (ALE) method to simulate the fluid-structure interaction process of the ribbon swinging in the airflow. The numerical method is validated by comparing it with wind tunnel experimental results from previous literature. This study utilized numerical simulation to investigate the impact of inflow velocity, ribbon material properties, and ribbon shape on drag characteristics. The research concluded that for a single ribbon, the drag value increases as the incoming flow velocity, ribbon material density, elastic modulus, and length-width ratio increase. In addition, the drag value of the annular ribbon is greater than that of the double ribbon. The drag values of the double ribbon and the annular ribbon are averaged to one side, the unilateral drag of the annular ribbon is greater than that of the single ribbon, and the unilateral drag of the double ribbon is smaller than that of the single ribbon. The conclusions can provide a reference for studying flexible ribbon stabilized projectiles.

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Active damping enhancement of flexible intelligent truss structures

Cited by 5 publications

References 0 publications

Model Analysis of Active Framed Structure

Model Analysis of Active Framed Structure

Active vibration control of a space truss using a lead zirconate titanate stack actuator

Fluid-structure Interaction Study on Drag Characteristics of Flexible Ribbon

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