Evaluation of Harpoon Tips for Debris Capture

Mataki, Takahiko; Akahoshi, Yasuhiro; Koura, Takao; Kitazawa, Yoshiaki; Shimamura, Kazuo; Izumiyama, Taku; Hashimoto, K.; Kawamoto, Satomi; Aoyama, Junichi; Fukuta, Tadao

doi:10.2322/tastj.14.pr_33

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…Campbell et al [10] and Aglietti et al [11] analyzed harpoons' velocity during harpoon impact experiments on aluminum honeycomb panels in the Remove DEBRIS project. Mataki et al [12] studied the influence of harpoon tip shape, launch velocity, incidence angle, low-temperature environment and self-locking structure on penetration results, but they lacked a study of ovoid harpoons. Wang et al [13], Fras et al [14], Kpenyigba et al [15], and Deng et al [16] studied the impact of blunt, hemispherical and bow-shaped projectiles at high intensities.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Simulation and Parameter Analysis of Harpoon Capturing Space Debris

Yue

Shi

et al. 2022

Materials

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This paper aims to study the penetration effect of harpoons on space debris to ensure the sustainable development of the space environment and solve the increasingly serious space debris problem. Firstly, a harpoon system was designed to capture space debris. Secondly, based on the Johnson–Cook dynamic constitutive model and fracture failure criterion, the finite element models of aluminum alloy plates were established. Then, the ballistic limit theory for the aluminum alloy target predicted the minimum launch velocity of the harpoon. Finally, the validation experiment was set up to verify the correctness of the model. The results show that the error between the simulation results of the speed for the harpoon embedded in the target and the theoretical results of the ballistic limit is 9.1%, which provides guidance for active space debris removal technology.

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Section: Introductionmentioning

confidence: 99%

Dynamic Simulation and Parameter Analysis of Harpoon Capturing Space Debris

Yue

Shi

et al. 2022

Materials

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“…There are several methods of attaching this structure, such as using a tethered anchor or a docking system with robotic arms, nets, or mechanical tentacles (Wormnes et al, 2013). Whereas docking systems require a complex structure for operation, using a tethered anchor is simple, and some studies have been conducted on tethered anchors in recent years (Dudziak et al, 2015, Mataki et al, 2015, Nguyen et al, 2017.…”

Section: Introductionmentioning

confidence: 99%

“…In their study, experiments with oblique collision were performed to evaluate the effect of the target angle on anchor penetration; however, the maximum considered target angle was only 40°, and the effect of the anchor point angle for an anchor with a conical tip was not investigated. Mataki et al (2015) performed experiments with different tip shapes and evaluated the influence of the tip shape on the impact; however, it was assumed that the anchor would pass through the target, and neither the penetration state nor the inclination of the target were investigated. Nguyen et al (2017) studied the effect of the anchor point and target angles but only considered target angles of up to 60° because of the limitations of their experimental equipment.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of the point angle and angle of incidence of a metal anchor on its docking state in a satellite structure for space debris mitigation

Nguyen

Tanaka

Hata

2018

Mechanical Engineering Journal

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The effects of the point angle of a metal anchor and the angle between the target and the plane perpendicular to the direction of travel of the anchor (target angle) on the docking state of the anchor in a satellite structure were experimentally and numerically evaluated. Projectile experiments were conducted using test plates at target angles of 0°, 30°, 45°, and 60° and two metal anchors with conical tips with different point angles (60° and 90°) to investigate the effects of the anchor point angle and the target angle and determine the minimum penetration velocity in each case. The experimental results indicate that the minimum penetration velocity increases as the target angle increases. Because of the limitations of the experimental equipment, performing experiments at certain target angles is difficult; thus, an accurate numerical simulation model was developed based on the experimental results to enable a more detailed investigation. The simulation results obtained using a bilinear isotropic hardening model and three Johnson-Cook models with different sets of parameters were compared with the experimental results to evaluate their applicability. Besides, the applicability of the numerical simulation model are also evaluated by experiments with different metal anchor shape and target plate thickness. It was confirmed that Johnson-Cook models can be used to effectively simulate the docking state and minimum penetration velocity of a metal anchor projection at different target angles. The effects of the point and target angles on the docking state of the metal anchors were investigated more quantitatively through numerical analysis. The numerical analysis results indicate that the minimum penetration velocities of the metal anchor with the smaller point angle (60°) are smaller than those of the metal anchor with the larger point angle (90°) when the angle of attack, which is the angle complementary angle to the target angle, is larger than half of the anchor point angle. When the angle of attack is smaller than this critical value, the metal anchor passes through the target at the minimum penetration velocity, and the conditions are not suitable for docking. The experimental and numerical simulation results indicate that a metal anchor with a smaller point angle can more easily penetrate a target plate and the angle of attack should be larger than half of the anchor point angle to achieve an adequate docking state.

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“…2) However, such designs create the potential for many problems, such as the expense and maintenance of a complex robotic system. Simplified methods for integrating debris mitigation systems with orbital debris have been proposed, [3][4][5] including the lodging of a tethered anchor into a defunct satellite.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Lodging a Metal Anchor into Free-falling Targets for Space Debris Mitigation

Nguyen

Tanaka

Hata

2018

Trans. Japan Soc. Aero. S Sci.

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An experimental system for lodging a metal anchor into free-falling targets has been developed and the lodging behavior has been investigated. Lodging a metal anchor into space debris to capture it is a good candidate for gathering the debris in space debris mitigation systems. Being one of the simplest methods, it can be applied to most any system, such as the electrodynamic tether system or a propulsion system. Basically, a tethered anchor is fired into space debris to capture it. In our experimental setup, a test plate representing the target space debris is initially attached to a rigid frame using two electromagnetic mounts. A specially designed projectile anchor is fired into the target, in precise coordination with the release of the target test plate into a free-fall condition (i.e., controlled by optical sensors mounted on the acceleration tube and electromagnetic mount). As a result, the metal anchor impacts the target while free-falling through space. The experimental results show that an adequate anchor accuracy can be achieved with the appropriate projectile velocity for a nonfixed (free-falling) target. Moreover, we show that the penetration velocity differs predictably between fixed and non-fixed targets, as well as that predictability changes based on the distance of the projectile's impact point from the target's centerof-mass (CM). The equations derived for predicting penetration velocities for free-falling targets were validated through physical testing and the required penetration velocities were accurately predicted.

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Evaluation of Harpoon Tips for Debris Capture

Cited by 8 publications

References 5 publications

Dynamic Simulation and Parameter Analysis of Harpoon Capturing Space Debris

Dynamic Simulation and Parameter Analysis of Harpoon Capturing Space Debris

Evaluation of the effect of the point angle and angle of incidence of a metal anchor on its docking state in a satellite structure for space debris mitigation

Experimental Study on Lodging a Metal Anchor into Free-falling Targets for Space Debris Mitigation

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