Performance evaluation of spaceborne cryocooler micro-vibration isolation system employing pseudoelastic SMA mesh washer

Kwon, Seong-Cheol; Jeon, Su-Hyeon; Oh, Hyun-Ung

doi:10.1016/j.cryogenics.2015.01.002

Cited by 34 publications

(22 citation statements)

References 15 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The strategy to achieve the design goal of this study is to use the radial direction of the ring-type SMA mesh washer as a main axis to support the vibration sources. This strategy is in contrast with the applications of conventional mesh washers [16][17][18][19][20], in which vibration damping is effective only in the thickness direction of the washer.…”

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 89%

“…The outer diameter, inner diameter, and thickness of the SMA mesh washer were 16 mm, 8 mm, and 5 mm, respectively. The density and mass of the mesh washer were 1.7 g/cm 3 and 1.88 g. The density was 50% lower than that of the mesh washer used by Youn et al [18] and Oh et al [16,17,22]. Figure 2 shows an example of the representative static test results of the SMA mesh washer shown in Figure 1 during compressive loading and unloading in the thickness direction of the washer [21].…”

Section: Basic Characteristics Of Superelastic Sma Mesh Washermentioning

confidence: 99%

“…The effectiveness of the isolator was demonstrated by launch environment tests and a micro-vibration measurement test of the cooler. Oh et al [16,17] also proposed a strategy to use a compressed shape memory alloy (SMA) mesh washer on the existing cooler isolation system [15] to attenuate the microvibration induced by cryocooler operation in on-orbit environment. Additionally, the SMA washer effectively enhanced the vibration attenuation performance during severe launch environments when compared to the conventional isolation system [15].…”

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 99%

See 2 more Smart Citations

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 89%

Section: Basic Characteristics Of Superelastic Sma Mesh Washermentioning

confidence: 99%

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 99%

See 1 more Smart Citation

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…Space applications of SMAs seek to solve the exceptional problems of actuation, release, and vibration attenuation in the launch of a spacecraft or subsequent operations, in conditions of microgravity and zero atmosphere. A solution to this problem has been proposed by Kwon et al [36] with a pseudoelastic shape memory alloy mesh washer. Thanks to this device, vibration isolation is achieved in a severe launch vibration environment as well for micro-vibrations from the cryocooler on-orbit ( Figure 11).…”

Section: Space Applicationsmentioning

confidence: 99%

Shape Memory Alloys for Aerospace, Recent Developments, and New Applications: A Short Review

2020

View full text Add to dashboard Cite

Shape memory alloys (SMAs) show a particular behavior that is the ability to recuperate the original shape while heating above specific critical temperatures (shape memory effect) or to withstand high deformations recoverable while unloading (pseudoelasticity). In many cases the SMAs play the actuator's role. Starting from the origin of the shape memory effect, the mechanical properties of these alloys are illustrated. This paper presents a review of SMAs applications in the aerospace field with particular emphasis on morphing wings (experimental and modeling), tailoring of the orientation and inlet geometry of many propulsion system, variable geometry chevron for thrust and noise optimization, and more in general reduction of power consumption. Space applications are described too: to isolate the micro-vibrations, for low-shock release devices and self-deployable solar sails. Novel configurations and devices are highlighted too.Materials 2020, 13, 1856 2 of 16 and novelty of the proposals. Ni-Ti alloys are the most employed ones, but the subject is not limited to them. Origin of the Shape Memory EffectFor the comprehension of the basic principles regarding the shape memory effect and pseudoelasticity, many contributions are useful. The crystallography of martensite, the transformation temperatures, and rate of martensite formation are discussed in details by Nishiyama [6].Materials 2020, 13, x FOR PEER REVIEW 2 of 16 relevance, number of articles, and novelty of the proposals. Ni-Ti alloys are the most employed ones, but the subject is not limited to them. Origin of the Shape Memory EffectFor the comprehension of the basic principles regarding the shape memory effect and pseudoelasticity, many contributions are useful. The crystallography of martensite, the transformation temperatures, and rate of martensite formation are discussed in details by Nishiyama [6]. Figure 1. Binary phase diagram of Ti-Ni alloy [7]. Figure 1

show abstract

“…Compared to traditional polymer material (such as natural rubber), the EMWM has some outstanding advantages, such as high-low temperature resistance and corrosion resistance. Therefore, EMWM has been widely used in extreme environments, such as the vibration reduction in ship's foundations under high temperature [6], the micro-vibration isolation system of spaceborne cryocoolers [7], and the sealing of rotors for turbo-machinery [8].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Constitutive Model on Dynamic Compressive Mechanical Properties of Entangled Metallic Wire Material under Low-Velocity Impact

Bai

et al. 2020

Materials

View full text Add to dashboard Cite

In this paper, the dynamic compressive mechanical properties of entangled metallic wire material (EMWM) under low-velocity impact were investigated and the constitutive model for EMWM under low-velocity impact was established. The research in this paper is based on a series of drop-hammer tests. The results show that the energy absorption rate of EMWM is in the range from 50% to 85%. Moreover, the EMWM with a higher relative density would not plastically deform macroscopically and has excellent characteristics of repetitive energy absorption. With the increase in relative density, the maximum deformation of EMWM decreases gradually, and the impact force of EMWM increases gradually. With the increase in impact-velocity, the phenomenon of stiffness softening before reaching the maximum deformation of EMWM becomes more significant. A constitutive model for EMWM based on the Sherwood-Frost model was established to predict the dynamic compressive mechanical properties of EMWM. The accuracy of the model was verified by comparing the calculated results with the experimental data of the EMWM with different relative densities under different impact-velocities. The comparison results show that the established model can properly predict the dynamic compressive mechanical characteristics of EMWM under low-velocity impact loading.

show abstract

Performance evaluation of spaceborne cryocooler micro-vibration isolation system employing pseudoelastic SMA mesh washer

Cited by 34 publications

References 15 publications

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

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

Shape Memory Alloys for Aerospace, Recent Developments, and New Applications: A Short Review

Experimental and Constitutive Model on Dynamic Compressive Mechanical Properties of Entangled Metallic Wire Material under Low-Velocity Impact

Contact Info

Product

Resources

About