Optimal target assignment for massive spectroscopic surveys

Macktoobian, Matin; Gillet, Denis; Kneib, Jean-Paul

doi:10.1016/j.ascom.2020.100364

Cited by 6 publications

(9 citation statements)

References 14 publications

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“…In previous sections, we used optimal target assignment [ 24 ] which supplies the maximum distribution of astrobots, i.e., their safety, and the minimum coordination, i.e., the minimum effort and time, required to arrange them in a desired coordination. In this section, we illustrate that quality of the coordination results of CSA are even resilient to various target distributions.…”

Section: Resultsmentioning

confidence: 99%

“…In previous sections, we used optimal target assignment [24] which supplies the maximum distribution of astrobots, i.e., their safety, and the minimum coordination, Direct coordination Two-phase coordination Fig. 7 Convergence times of 1000 tests on the experimental setup with respect to both coordination strategies.…”

Section: Target Distribution Influence On Completenessmentioning

confidence: 99%

See 1 more Smart Citation

Experimental evaluation of complete safe coordination of astrobots for Sloan Digital Sky Survey V

et al. 2020

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The data throughput of massive spectroscopic surveys in the course of each observation is directly coordinated with the number of optical fibers which reach their target. In this paper, we evaluate the safety and the performance of the astrobots coordination in SDSS-V by conducting various experimental and simulated tests. We illustrate that our strategy provides a complete coordination condition which depends on the operational characteristics of astrobots, their configurations, and their targets. Namely, a coordination method based on the notion of cooperative artificial potential fields is used to generate safe and complete trajectories for astrobots. Optimal target assignment further improves the performance of the used algorithm in terms of faster convergences and less oscillatory movements. Both random targets and galaxy catalog targets are employed to observe the coordination success of the algorithm in various target distributions. The proposed method is capable of handling all potential collisions in the course of coordination. Once the completeness condition is fulfilled according to initial configuration of astrobots and their targets, the algorithm reaches full convergence of astrobots. Should one assign targets to astrobots using efficient strategies, convergence time as well as the number of oscillations decrease in the course of coordination. Rare incomplete scenarios are simply resolved by trivial modifications of astrobots swarms’ parameters.

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Section: Resultsmentioning

confidence: 99%

Section: Target Distribution Influence On Completenessmentioning

confidence: 99%

Experimental evaluation of complete safe coordination of astrobots for Sloan Digital Sky Survey V

et al. 2020

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“…But none of the stated methods above effectively formulate and address those requirements in the course of assignments. In this regard, optimal target assignment [11] presents the first solution to the problem whose impact on the coordination phase is fully specified. Namely, this method performs assignment constrained to two performance and safety requirements.…”

Section: A Target-to-astrobot Assignmentmentioning

confidence: 99%

Astrobotics: Swarm Robotics for Astrophysical Studies

Macktoobian

Gillet

Kneib

2021

IEEE Robot. Automat. Mag.

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This paper introduces the emerging field of astrobotics, that is, a recently-established branch of robotics to be of service to astrophysics and observational astronomy. We first describe a modern requirement of dark matter studies, i.e., the generation of the map of the observable universe, using astrobots. Astrobots differ from conventional two-degree-of-freedom robotic manipulators in two respects. First, the dense formation of astrobots give rise to the extremely overlapping dynamics of neighboring astrobots which make them severely subject to collisions. Second, the structure of astrobots and their mechanical specifications are specialized due to the embedded optical fibers passed through them. We focus on the coordination problem of astrobots whose solutions shall be collision-free, fast execution, and complete in terms of the astrobots' convergence rates. We also illustrate the significant impact of astrobots assignments to observational targets on the quality of coordination solutions To present the current state of the field, we elaborate the open problems including next-generation astrophysical projects including ∼20,000 astrobots, and other fields, such as space debris tracking, in which astrobots may be potentially used.

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“…Careful path planning, with collision avoidance algorithms, prevents clashing of the positioners. [34][35][36][37] As the robots are limited in diameter, the available space in length is exploited. Figure 6 shows a cross-section of a single positioner.…”

Section: Positionermentioning

confidence: 99%