Advanced 1.5 Hz passive viscous isolation system

Davis, P.; Cunningham, David; Harrell, J. P.

doi:10.2514/6.1994-1651

Cited by 65 publications

(44 citation statements)

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“…Narkhede等人 [10] . 最早见于Honeywell公司研制的一系列基于流体阻尼的被动型隔振器, 并成功应用于哈勃望远镜中 [22,23] , 该类型阻尼器采用孔式结构来提供阻尼力, 隔振效果良好, 但是文献中并没有介绍其刚度及阻尼机理. 王杰等人 [24] 测定了基于流体阻尼的三参数隔振系统动态刚度和动态阻尼, 证明了高频激励下刚度和阻尼会随频率发生改变.…”

Section: 引言unclassified

Analytical model of micro vibration fluid viscous damper under medium and high frequency excitation

Jiao¹,

Ma²,

Zhao³

et al. 2017

Sci. Sin.-Tech.

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Section: 引言unclassified

Analytical model of micro vibration fluid viscous damper under medium and high frequency excitation

Jiao¹,

Ma²,

Zhao³

et al. 2017

Sci. Sin.-Tech.

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“…Davis et al [7] proposed a passive viscous-damped strut (D-strut) with a very low fundamental frequency of 1.5 Hz to isolate disturbance forces and torques from a Honeywell HM-1800 RWA with a frequency band from 2 to 300 Hz. In addition, it has been widely used in various space programs including the Hubble mission.…”

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 99%

Experimental Validation of Fly-Wheel Passive Launch and On-Orbit Vibration Isolation System by Using a Superelastic SMA Mesh Washer Isolator

Kwon

2017

International Journal of Aerospace Engineering

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On-board appendages with mechanical moving parts for satellites produce undesirable micro-jitters during their on-orbit operation. These micro-jitters may seriously affect the image quality from high-resolution observation satellites. A new application form of a passive vibration isolation system was proposed and investigated using a pseudoelastic SMA mesh washer. This system guarantees vibration isolation performance in a launch environment while effectively isolating the micro-disturbances from the on-orbit operation of jitter source. The main feature of the isolator proposed in this study is the use of a ring-type mesh washer as the main axis to support the micro-jitter source. This feature contrasts with conventional applications of the mesh washers where vibration damping is effective only in the thickness direction of the mesh washer. In this study, the basic characteristics of the SMA mesh washer isolator in each axis were measured in static tests. The effectiveness of the design for the new application form of the SMA mesh washer proposed in this study was demonstrated through both launch environment vibration test at qualification level and micro-jitter measurement test which corresponds to on-orbit condition.

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“…The most unique characteristic is the non-contacting interference, which helps ensure a friction-free mechanism and long service life. (Davis, et al, 1986) (Davis and Ginter, 1991) (Davis, et al, 1994). The Chandra X-ray Observatory of NASA employed a hexapod isolator for RW disturbance isolation (Pendergast, et al, 1998).…”

Section: -1) Installation Of Damping Materialsmentioning

confidence: 99%

Microvibration in spacecraft

Komatsu

Uchida

2014

Mechanical Engineering Reviews

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The limitation of technology to estimate the on-orbit microvibration of a spacecraft is shown in this review paper. At present, the mechanical engineering ability cannot meet the mission requirements and the configuration of the pre-flight ground tests is far from the on-orbit configuration from the microvibration point of view. It is also extremely difficult to correlate the mathematical dynamical model (Finite Element Model (FEM)) exactly to test data up to the mid-frequency range where microvibration can be problematic even if considerable manpower is committed to analyze the correlation. Accordingly, a safety factor of at least single digit range must be introduced as part of disturbance control management.

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Advanced 1.5 Hz passive viscous isolation system

Cited by 65 publications

References 0 publications

Analytical model of micro vibration fluid viscous damper under medium and high frequency excitation

Analytical model of micro vibration fluid viscous damper under medium and high frequency excitation

Experimental Validation of Fly-Wheel Passive Launch and On-Orbit Vibration Isolation System by Using a Superelastic SMA Mesh Washer Isolator

Microvibration in spacecraft

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