Nonlinear Control of a Double Pendulum Electrodynamic Tether System

Kojima, Hirohisa; Sugimoto, Tetsuro

doi:10.2514/1.24537

Cited by 13 publications

(5 citation statements)

References 6 publications

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“…Kojima and Sugimoto employed the decoupling and model-following-decoupling methods to perform a nonlinear control of a double pendulum in electrodynamic tethers systems (EDT) [54]. They used nonlinear control of liberation motion to find the nonlinear control input where each output could be controlled independently.…”

Section: Decoupling Control Method/ Model-following-decoupling Contromentioning

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: Decoupling Control Method/ Model-following-decoupling Contromentioning

confidence: 99%

Review of Control Methods and Strategies of Space Tether Satellites

Tirop¹,

Zhang²

2019

AJTTE

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“…Kojima et al [99] proposed to control the librational motion of a three-mass TSS in an elliptic orbit by using the existing delayed feedback control, and designed an innovative control scheme, combining the delayed feedback control with model-following and decoupling-control method, to improve the control performance. 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.…”

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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“…(25) is set equal to Eq. (30), and β is assumed to be regular (i.e., β a0), then the following active force controller can be designed:…”

Section: Mission-function Control For Tethered Satellite/climber Systemmentioning

confidence: 99%

“…1 shows the model of TSS with a climber used in this study: tethered satellite/climber system (TSCS). This model is similar to the three-mass tethered satellite model [30,31] or two-bar model [32] except that the climber ascends and descends the tether, whereas the center satellite in the three-mass tethered satellite model [30,31] and the twobar model [32] do not. The climber is at a distance L 1 along the tether from the mother satellite, and the subsatellite is at a distance L 2 along the tether from the climber.…”

Section: Introductionmentioning

confidence: 96%