Effects of ascending and descending climbers on space elevator cable dynamics

Ishikawa, Yoshinori; Otsuka, Kiyotoshi; Yamagiwa, Yoshiki; Doi, Hinata

doi:10.1016/j.actaastro.2018.01.031

Cited by 24 publications

(9 citation statements)

References 4 publications

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“…Considering the definition of the system coordinates in Equation (7), the system mass matrix can be written as…”

Section: Modeling Of L-ttsmentioning

confidence: 99%

“…The space tether transportation system (TTS) has a wide scope of applications for low‐cost long‐range mass transportation missions 1–5 . Many researchers have devoted themselves to the developments of the field 6–10 . The TTS consists of one or two tethers with large flexibility, connecting end satellites and transferring payloads along with them by using several climbers 9 .…”

Section: Introductionmentioning

confidence: 99%

“…Cohen and Misra 3 verified the influence of transporting climbers on the dynamics of the space elevator and proposed several climber‐moving strategies to reduce these influences. By using the model of two‐piece dumbbell, Ishikawa et al 7 studied the influence of simultaneous operation of moving climbers in two opposite directions on the dynamics of TTS and found that this operation can effectively reduce the cable inclination.…”

Section: Introductionmentioning

confidence: 99%

“…Cohen and Misra 3 verified the influence of transporting climbers on the dynamics of the space elevator and proposed several climber-moving strategies to reduce these influences. By using the model of two-piece dumbbell, Ishikawa et al 7 studied the influence of simultaneous operation of moving climbers in two opposite directions on the dynamics of TTS and found that this operation can effectively reduce the cable inclination. Shi et al 21 proposed an optimal stabilization method of a multiclimber PSE based on the dumbbell model and found that changing the middle climber's relative velocity is effective in reducing the magnitudes of libration angles.…”

mentioning

confidence: 99%

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Dynamic modeling and analysis of the looped space tether transportation system based on ANCF

Yang

Wang

Zhang

et al. 2022

Int Journal of Mech Sys Dyn

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A high-fidelity multibody-system dynamic model of the looped tether transportation system (L-TTS) is proposed in this study to study its large deformation as well as large overall motion. The absolute nodal coordinate formulation (ANCF)-based gradient-deficient beam element is employed to establish the accurate model of the two flexible tethers subject to large deformations. The relative movement of climbers along tethers is described by using the sliding joint model based on ANCF.To reduce the collision risks between tethers and climbers, two libration suppression strategies, namely, the decelerated motion of climbers relative to tethers and multiple climbers per tether are investigated in this study. Several numerical simulations not only validate the effectiveness of the two strategies in reducing the collision risks between climbers and tethers, the overall librations of L-TTS, and the magnitudes of the longitudinal elastic force of tethers, but also verify the good performance of the high-fidelity model proposed in this study for dynamic simulation of the L-TTS in microgravity conditions.

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“…Considering the definition of the system coordinates in Equation (7), the system mass matrix can be written as…”

Section: Modeling Of L-ttsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Dynamic modeling and analysis of the looped space tether transportation system based on ANCF

Yang

Wang

Zhang

et al. 2022

Int Journal of Mech Sys Dyn

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“…Oguamanam [15] investigated the dynamic responses of an orbiting flexible beam under different travel profile of the moving mass and suggested a travel profile with minimum constant velocity phase duration. Ishikawa [16] addressed the effects of the climber motion on the space elevator cable dynamics in both ascending and descending situations, and suggested the simultaneous operation of two climbers to suppress the inclination of the cable. Li [3] investigated the libration suppression of partial space elevator with a moving climber and found the tether deployment at the subsatellites can produce positive effect to suppress the libration motion.…”

Section: Introductionmentioning

confidence: 99%

A novel vibration-reduction motion planning method for fast moving mass traveling along flexible structures

Wang

Xing

et al. 2023

Preprint

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Many classic components or equipment in the fields of aerospace, robotics, and civil engineering, can be classified into a flexible structure with moving components actively traveling on it, which constitutes a self-excited system and exhibits complex nonlinear dynamic coupling effects between the flexible substrate and moving mass. The excited structural vibration due to moving mass motion will bring challenges to the stability and mission effectiveness of the whole system, especially in the case of short-time and fast movement. Thereby, the paper presents analyses and optimization of the motion profiles of a moving mass traveling on a flexible simply supported beam with the goal of reducing the self-excited structural deflection and vibration. The dynamic responses imply that the moving mass would induce evident motion-induced dynamic deflection and residual vibration, and such effects highly depend on the motion profile. A high-efficiency motion planning approach is imposed by employing the quintic spline curve and Kriging surrogate model based optimization algorithm combined with the expected improvement infilling-sampling criterion. The favorable motion profiles can be found by using only 2 waypoints and approximately 100 samplings. In the case of minimization of the transient deflection amplitude, lower transient deflection, which is even lower than the static value, can be obtained using the optimized motion profile. In the case of minimization of residual vibration energy, a smooth deformation history of the substrate beam can be produced while the vibration energy has also been significantly reduced. Using the minimization of residual vibration energy as an objective function is recommended as a preferable way in the motion planning issue. Improved motion profiles with shorter terminal time are obtained and proved the effectiveness and robustness of the proposed optimization approach. The proposed approach and associated results could provide a feasible way to design a favorable moving mass motion from the perspective of vibration reduction for flexible structures.

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Dynamics of Partial Space Elevator with Parallel Tethers and Multiple Climbers

Zhu

2020

Lecture Notes in Electrical Engineering

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Effects of ascending and descending climbers on space elevator cable dynamics

Cited by 24 publications

References 4 publications

Dynamic modeling and analysis of the looped space tether transportation system based on ANCF

Dynamic modeling and analysis of the looped space tether transportation system based on ANCF

A novel vibration-reduction motion planning method for fast moving mass traveling along flexible structures

Dynamics of Partial Space Elevator with Parallel Tethers and Multiple Climbers

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