Optimal Deployment/Retrieval of a Tethered Formation Spinning in the Orbital Plane

Williams, Paul

doi:10.2514/1.17093

Cited by 35 publications

(7 citation statements)

References 21 publications

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“…Williams applied these methods to the deployment and retrieval of a three-mass tethered formation spinning in the orbital plane [83]. He treated the slow orbital and fast liberation motions separately in the optimal control of the electrodynamic tether orbital transfer [84].…”

Section: Optimal Control Methodsmentioning

confidence: 99%

Review of Control Methods and Strategies of Space Tether Satellites

Tirop¹,

Zhang²

2019

AJTTE

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Space tether satellites systems are one of the most promising directions in the modern space industry. Such systems consist of two or more spacecraft connected to each other by very long tethers. Great extension and variable configuration of the system in the orbital flight conditions provide some dynamic features, which are not typical of conventional spacecraft. The concept of the tethered satellite system (TSS) promises to revolutionize many aspects of space exploration and exploitation. It provides not only numerous possible and valuable applications, but also challenging and interesting problems related to their dynamics, control, and physical implementation. The overarching theme of the paper is to show various control methods of the tethered satellites system (TSS) that have been undertaken recently, and also to emphasize on the importance of the TSS control method as an important aspect in the tether concepts, design, and missions. This review article presents the historical background and recent hot topics for the space tethers, and introduces the dynamics and control of TSSs in a progressive manner, from basic operating principles to the state-of-the-art achievements. The paper introduces the strategies and methods applied in controlling the TSS not excluding their advantages and disadvantages during the tether satellite deployment, retrieval, and station keeping procedures. At the end of the paper, a conclusion is made about the effectiveness of the control methods in stabilizing the libration and vibration motions of the TSS.

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Section: Optimal Control Methodsmentioning

confidence: 99%

Review of Control Methods and Strategies of Space Tether Satellites

Tirop¹,

Zhang²

2019

AJTTE

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“…Kojima and Sugimoto [100] later extended the investigation to the double pendulum EDT system, and used a decoupling control method and a modelfollowing-decoupling control method to stabilize the chaotic, librational motion of the EDTs by changing the current along the tethers. Williams [101] applied optimal control methods to the deployment and retrieval of a three-mass tethered formation spinning in the orbital plane, and used direct transcription methods to find the optimal trajectories for three kinds of tension-controlled maneuvers, including minimumtime reorientation, deployment and retrieval. He also made a systematic discussion on the dynamics and control of a triangular tethered formation spinning in the orbital plane and a double-pyramid Earth-pointing formation.…”

Section: Dynamics and Control Of Tethered Satellite Formationsmentioning

confidence: 99%

Advances in dynamics and control of tethered satellite systems

2008

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The concept of tethered satellite system (TSS) promises to revolutionize many aspects of space exploration and exploitation. It provides not only numerous possible and valuable applications, but also challenging and interesting problems related to their dynamics, control, and physical implementation. Over the past decades, this exciting topic has attracted significant attention from many researchers and gained a vast number of analytical, numerical and experimental achievements with a focus on the two essential aspects of both dynamics and control. This review article presents the historic background and recent hot topics for the space tethers, and introduces the dynamics and control of TSSs in a progressive manner, from basic operating principles to the state-of-the-art achievements.

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“…3.1. Similar models have also been used for optimal control of tether deployment and retrieval of a subsatellite from a shuttle in Keplerian orbit [6,43,160,161]. For the tether models, the spacecraft is in orbit and the gravity gradient is included, but it is still an easier model to solve because the spacecraft has a constant angular velocity relative to origin (Earth).…”

Section: Analytical Modelmentioning

confidence: 99%