Agile Multi- Targeting Spacecraft Control Via Backstepping-Sliding mode Approach

Kasiri, Ali; Saberi, Farhad Fani

doi:10.1109/icrom48714.2019.9071889

Cited by 1 publication

(1 citation statement)

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“…For a real example, when a servicer or delivery spacecraft is performing a docking or berthing mission in the proximity of the dead Envisat 10 , which has huge extendable solar panels, antennas, and many other external appendages, even a small control error or delay may cause a disastrous accident and produce countless amounts of debris. Consequently, in contrast to traditional space missions (remote sensing or communication), where preserving the attitude (usually in nadir condition) with high accuracy was the only crucial matter, the ability to make agile and large-angle attitude maneuvers are two additional requirements for chaser spacecraft that play an important role in OOS mission reliability/safety 11 . However, the impact of fuel slushing resulting from such maneuvers, which alter the chaser's moment of inertia, must not be disregarded.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear adaptive pose motion control of a servicer spacecraft in approximation with an accelerated tumbling target

Kasiri,

Fani Saberi

2024

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Removing a limited number of large debris can significantly reduce space debris risks. These bodies are generally exposed to extreme environmental disturbance torques or consecutive accidents due to their large wet area, which causes them to experience accelerated high-rate tumbling motion. The existing literature has adequately explored the approximation operations with non-cooperative targets exhibiting 3-axis tumbling motion. However, the research gap lies in the lack of attention given to addressing this approximation for targets undergoing accelerated motion. Agile, accurate, and large-angle maneuvers are three common necessities for safely capturing such targets. Changes in the moment of inertia brought on by fuel slushing cannot be disregarded during such a maneuver. To deal with nonlinearities, adverse coupling effects, actuator saturation constraints, time-varying moment of inertia, and external disturbances that worsen during accelerated agile large-angle maneuvers, a novel adaptive control approach is developed in this paper. The controller's main advantage is its adjustable desired acceleration, which maintains its performance even when dealing with accelerated motion. The control law is directly synthesized from the nonlinear relative equations of motion, without any linearization or simplification of the system dynamics, making it robust to a variety of orbital elements and target behaviors. Adaptation laws are extracted from the Lyapunov stability theorem in a way that guarantees asymptotic stability. Moreover, control actuator roles (delay, saturation, and allocation) are accounted for in modeling and simulation. Finally, a comprehensive numerical simulation based on three different realistic and strict scenarios is carried out to demonstrate the effectiveness and performance of the proposed control approach. The controller's robustness against time-varying dynamic parameters (sharp and sudden change, smooth and slow change, and periodic change) is extensively demonstrated through simulation.

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Section: Introductionmentioning

confidence: 99%