Research on frictional characteristics of a space split telescope deployable mechanism variable diameter internal drive device in the inter-stage transition phase

Guan, Yingjun; Huang, Weiqi; Wang, Hao; Lu, Huanquan; Yang, Huisheng

doi:10.1007/s11012-023-01700-2

Cited by 2 publications

(6 citation statements)

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“…Since the type of frictional contact at the time of collision is elastic rolling contact friction, the normal contact force 21 at this time is: where is the depth of indentation, and is the modulus of elasticity, and is the radius of the rubber wheel. The tangential friction at this point contains rolling resistance and hysteresis friction caused by deformation.…”

Section: Methodsmentioning

confidence: 99%

“…For the resistance, there is: where the normal contact forces, is the rolling speed, is the relaxation time, and is the rubber wheel radius. The interaction between hysteresis friction and adhesive friction has been discussed in detail in 21 : where and are constants; is the normal force; the exponent ; The and are the rubber loss and the composite modulus, respectively. Therefore, the instantaneous tangential friction is: …”

Section: Methodsmentioning

confidence: 99%

“…The viscoelastic material constitutive of the three-parameter collision model leads to the displacement equation as the unknown quantity, The stress changes ( ) during the displacement process were derived from earlier investigations into elastic friction contact occurring in the interstage transition stage 21 : where the equation: …”

Section: Methodsmentioning

confidence: 99%

“…1 . In this context, our analysis stems from prior research on the flexible multibody dynamics of the variable-diameter internal drive device and the investigation of elastic frictional contact characteristics during inter-stage transition phases 21 , 22 . This comprehensive study is complemented by the calculation of the fixed frequency of the elastic material (Emulsion-polymerized styrene butadiene rubber).…”

Section: Analysis Of Inter-stage Transition State In Variable Diamete...mentioning

confidence: 99%

“…Compared to traditional driving and tensioning devices in the space telescope's telescopic deployable mechanism, this innovative approach offers several advantages, including high deployment accuracy, significant stiffness, and extended deployment distance. However, as research progresses 21 , 22 , it becomes apparent that, owing to the nested configuration of the sleeve, a discontinuous stepped surface emerges during the deployment process. When the variable diameter internal drive device moves within the sleeve, the elastic material comes into contact with and collides against this discontinuous surface.…”

Section: Introductionmentioning

confidence: 99%

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Research space telescope deployable mechanism variable diameter internal drive device elastic collision contact characteristics in the inter-stage transition

Guan,

Huang,

Wang

et al. 2023

Sci Rep

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To address the problem of elastic contact discrepancies between a variable-diameter internal drive device and a non-continuous surface during the transition, caused by the vibrations resulting from elastic collision impact when the motion speed of the elastic body increases, the following steps were taken. First, we established models for elastic collision, impact, and vibration during the inter-stage transition to analyze how motion speed and preload affect the elastic contact characteristics between the two components. Subsequently, we employed the finite element method to further analyze the elastic contact state, using identical loads but varying motion speeds and radial preloads as boundary conditions. Finally, an experimental prototype was developed to validate the elastic contact state of the elastic body during the inter-stage transition. The results indicated that the amplitude of elastic body vibration increased with higher motion speed, while it decreased with higher radial preload. Therefore, it is necessary to adjust radial preload at different times to ensure effective elastic contact between the elastic body and the non-continuous surface during the inter-stage transition. This approach not only enhances deployment speed but also guarantees the stability of the inter-stage transition.

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