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Article
Spider-inspired anti-impact hydraulics-based structure for on-orbit capture
An ever-growing number of malfunctioning satellites and space debris now pose a severe threat to space activities, such that on-orbit capture of non-cooperative targets has become an urgent task. During on-orb...
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Article
Optimal nutation suppressing method for detumbling satellites via a flexible deceleration device
Malfunctioning satellites are normally in tumbling state due to residual angular momentum, rendering direct capture impossible. Therefore, detumbling these objects is an indispensable phase for on-orbit safe c...
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Article
Decoupling and quasi-linearization methods for boundary value problems in relative orbital mechanics
Accurate and real-time orbit computational methods are highly required in space tasks of the space vehicles. A decoupling method and a quasi-linearization method are proposed to efficiently and accurately solv...
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Article
Dynamic analysis of detumbling a rotating satellite using flexible deceleration rod
Malfunctioning satellites are generally non-cooperative tumbling objects. Due to their complex tumbling motion, it is essential to stabilize the target within an acceptable rotating range in the pre-capture ph...
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Article
Hierarchical motion planning at the acceleration level based on task priority matrix for space robot
This paper addresses the motion planning problem for a free-floating redundant space robotic system at the acceleration level considering the strict task priority. The robot is primarily expected to track the ...
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Article
Clinical characteristics of 194 cases of COVID-19 in Huanggang and Taian, China
We aimed to report the clinical characteristics of 194 cases coronavirus disease-19 (COVID-19) in Huanggang, Hubei and Taian, Shandong.
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Article
Open AccessUncertainty-based Optimization Algorithms in Designing Fractionated Spacecraft
A fractionated spacecraft is an innovative application of a distributive space system. To fully understand the impact of various uncertainties on its development, launch and in-orbit operation, we use the stoc...
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Article
A comparison of classical Runge-Kutta and Henon’s methods for capturing chaos and chaotic transients in an aeroelastic system with freeplay nonlinearity
A typical two-dimensional airfoil with freeplay nonlinearity in pitch undergoing subsonic flow is studied via numerical integration methods. Due to the existence of the discontinuous nonlinearity, the classica...