Real time control of tethered satellite systems to de-orbit space debris

Razzaghi, Pouria; Khatib, Ehab Al; Bakhtiari, Shide; Hürmüzlü, Yildirim

doi:10.1016/j.ast.2020.106379

Cited by 23 publications

(3 citation statements)

References 27 publications

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“…This pulling force turns the potential energy of the debris into kinetic energy. Space tether systems are varying in terms of many different aspects, such as open-loop or closed-loop control (Sun and Zhong, 2020;Zhu et al, 2021) and rigid or elastic (Zhao et al, 2020;Razzaghi et al, 2021;Shan and Shi, 2021;Hu et al, 2022;Zhang et al, 2022). Space tethers are very famous and have a wide range of application areas.…”

Section: Tethering Methodsmentioning

confidence: 99%

ET-Class: An Energy Transfer-Based Classification of Space Debris Removal Methods and Missions

Yalçin¹,

Martinez²,

Delisle³

et al. 2022

Front. Space Technol.

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Space debris is positioned as a fatal problem for current and future space missions. Many effective space debris removal methods have been proposed in the past decade, and several techniques have been either tested on the ground or in parabolic flight experiments. Nevertheless, no uncooperative debris has been removed from any orbit until this moment. Therefore, to expand this research field and progressing the development of space debris removal technologies, this paper reviews and compares the existing technologies with past, present, and future methods and missions. Moreover, since one of the critical problems when designing space debris removal solutions is how to transfer the energy between the chaser/de-orbiting kit and target during the first interaction, this paper proposes a novel classification approach, named ET-Class (Energy Transfer Class). This classification approach provides an energy-based perspective to the space debris phenomenon by classifying how existing methods dissipate or store energy during the first contact.

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Section: Tethering Methodsmentioning

confidence: 99%

ET-Class: An Energy Transfer-Based Classification of Space Debris Removal Methods and Missions

Yalçin¹,

Martinez²,

Delisle³

et al. 2022

Front. Space Technol.

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“…The basic principle of closed-loop remote control have been studied in the literature of wireless networked control systems [5]. Nonetheless, the feasibility of these methods becomes questionable in the presence of mission-critical remote control applications including remote surgery [6], industrial internet of things (IIoT) control in a smart factory [7], autonomous vehicular platooning [8], low-earth-orbit (LEO) satellite maneuvering to avoid space debris [9], and so forth. These remote control applications not only impose extremely stringent communication latency requirements but also are unable to afford missing any single control command.…”

Section: Introductionmentioning

confidence: 99%

Predictive Closed-Loop Remote Control Over Wireless Two-Way Split Koopman Autoencoder

Girgis

Seo

Park

et al. 2022

IEEE Internet Things J.

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Real-time remote control over wireless is an important-yet-challenging application in 5G and beyond due to its mission-critical nature under limited communication resources. Current solutions hinge on not only utilizing ultra-reliable and low-latency communication (URLLC) links but also predicting future states, which may consume enormous communication resources and struggle with a short prediction time horizon. To fill this void, in this article we propose a novel two-way Koopman autoencoder (AE) approach wherein: 1) a sensing Koopman AE learns to understand the temporal state dynamics and predicts missing packets from a sensor to its remote controller; and 2) a controlling Koopman AE learns to understand the temporal action dynamics and predicts missing packets from the controller to an actuator co-located with the sensor. Specifically, each Koopman AE aims to learn the Koopman operator in the hidden layers while the encoder of the AE aims to project the non-linear dynamics onto a lifted subspace, which is reverted into the original non-linear dynamics by the decoder of the AE. The Koopman operator describes the linearized temporal dynamics, enabling long-term future prediction and coping with missing packets and closed-form optimal control in the lifted subspace. Simulation results corroborate that the proposed approach achieves a 38x lower mean squared control error at 0 dBm signal-to-noise ratio (SNR) than the non-predictive baseline.

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“…TSSs are a new class of space vehicle that join two or more spacecraft together into a single structure by using soft tethers [ 6 , 7 ]. TSSs are utilized in man-made microgravity environments [ 8 , 9 ], spacecraft orbit transfers [ 10 , 11 ] and space debris cleanup [ 12 , 13 ], and they exhibit stronger reliability, higher stability and more diversified functions [ 14 , 15 ] when compared to traditional satellites. Tethered satellites are in unstable states during deployment without effective control as a result of disturbances produced by the space environment [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior Analysis and Stability Control of Tethered Satellite Formation Deployment

Zhang

et al. 2021

Sensors

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In recent years, Tethered Space Systems (TSSs) have received significant attention in aerospace research as a result of their significant advantages: dexterousness, long life cycles and fuel-less engines. However, configurational conversion processes of tethered satellite formation systems in a complex space environment are essentially unstable. Due to their structural peculiarities and the special environment in outer space, TSS vibrations are easily produced. These types of vibrations are extremely harmful to spacecraft. Hence, the nonlinear dynamic behavior of systems based on a simplified rigid-rod tether model is analyzed in this paper. Two stability control laws for tether release rate and tether tension are proposed in order to control tether length variation. In addition, periodic stability of time-varying control systems after deployment is analyzed by using Floquet theory, and small parameter domains of systems in asymptotically stable states are obtained. Numerical simulations show that proposed tether tension controls can suppress in-plane and out-of-plane librations of rigid tethered satellites, while spacecraft and tether stability control goals can be achieved. Most importantly, this paper provides tether release rate and tether tension control laws for suppressing wide-ranging TSS vibrations that are valuable for improving TSS attitude control accuracy and performance, specifically for TSSs that are operating in low-eccentricity orbits.

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Real time control of tethered satellite systems to de-orbit space debris

Cited by 23 publications

References 27 publications

ET-Class: An Energy Transfer-Based Classification of Space Debris Removal Methods and Missions

ET-Class: An Energy Transfer-Based Classification of Space Debris Removal Methods and Missions

Predictive Closed-Loop Remote Control Over Wireless Two-Way Split Koopman Autoencoder

Dynamic Behavior Analysis and Stability Control of Tethered Satellite Formation Deployment

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