45,290 Result(s)
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Engineering
Vibration, Dynamical Systems, Control
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Article
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Article
Real-time hybrid method for maneuver detection and estimation of non-cooperative space targets
A novel hybrid scheme for the maneuver detection and estimation of a noncooperative space target was proposed in this study. The optical measurements, together with the range and range rate measurements from t...
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Initial orbit determination of some cislunar orbits based on short-arc optical observations
Ground- and space-based optical observation is an efficient way to catalog objects in the cislunar space. Initial orbit determination based on optical data is still an open problem for cislunar objects. The mo...
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Precise orbit determination for Tianwen-1 during map** phase
The map** phase is a key stage of the Tianwen-1 orbiter. It has the longest exploration time and gathers abundant radio tracking data via the Chinese deep space network. Thus, it also provides opportunities ...
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Precise orbit determination for low Earth orbit satellites using GNSS: Observations, models, and methods
Spaceborne global navigation satellite system (GNSS) has significantly revolutionized the development of autonomous orbit determination techniques for low Earth orbit satellites for decades. Using a state-of-t...
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Spaceborne and ground-based sensor collaboration: Advancing resident space objects’ orbit determination for space sustainability
The limited space around the Earth is getting cluttered with leftover fragments from old missions, creating a real challenge. As more satellites are launched, even debris pieces as small as 5 mm must be tracke...
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Perturbed initial orbit determination
An algorithm for robust initial orbit determination (IOD) under perturbed orbital dynamics is presented. By leveraging map inversion techniques defined in the algebra of Taylor polynomials, this tool returns a...
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Autonomous navigation of an asteroid orbiter enhanced by a beacon satellite in a high-altitude orbit
This study aims to assess the autonomous navigation performance of an asteroid orbiter enhanced using an inter-satellite link to a beacon satellite. Autonomous navigation includes the orbit determination of th...
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Message from the Guest Editors of the Special Issue on Precise Orbit Determination
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A comparative assessment of gravitational field modeling methods for binary asteroid landing
The tradeoff between accuracy and efficiency in gravitational field modeling for binary asteroid landing is one of the challenges in dynamical analyses. Four representative gravitational modeling methods are e...
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Open AccessNonlinear spatiotemporal characteristics of wind–rain flow around the trains passing through the tunnel entrance during rainstorms
Tropical storms present a significant risk to the safety of high-speed trains due to the extreme wind and rainfall they bring. This study employs Eulerian multiphase and Shear-Stress Transport k-ω turbulence mode...
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Impact of non-smooth threshold control on a reaction–diffusion predator–prey model with time delay
To explore the efficacy of integrated pest management, we modify the predator–prey (pest–natural enemy) model by incorporating Holling III functional response and transform it into a non-smooth Filippov contro...
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Response of hydraulic pipes to combined excitation in thermal environment
Generally, the hydraulic pipe of a warplane experiences the pulsating flow generated by the plunger pump and the strong excitation generated by the jet engine. Furthermore, the pipe is situated in a high-tempe...
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Open AccessStructural health monitoring of an onshore steel wind turbine
The study presents the development of a structural monitoring system installed in a 45-m-high steel wind tower located in Italy. The installed monitoring system was composed by 16 strain gauges placed in the t...
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Field monitoring of the movements and deformations of two subway tunnels during the construction of an overcrossing tunnel: a case study
During the construction of a new tunnel overcrossing existing tunnels at close proximity, the existing tunnels should be protected by protective structures and/or ground improvement measures. However, the cons...
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Dynamic rotation medical image encryption scheme based on improved Lorenz chaos
With the rapid development of AI technology and the continuous improvement of Internet technology, information technology and intelligent technology are gradually combined with medical treatment, which has giv...
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Open AccessDetermination of future creep and seismic behaviors of dams using 3D analyses validated by long-term levelling measurements
This study aims to assess the future structural performance of the Kozlu-Ulutan clay core rockfill (CCR) dam, one of the most significant water structures in the Black Sea region of Turkey, by utilizing 35 yea...
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Adaptive prescribed performance tracking control for a class of nonlinear systems with actuator faults via a quantized event-triggered control scheme
This paper focuses on the issue of adaptive quantized event-triggered prescribed performance control for a class of uncertain nonlinear systems subject to actuator faults from a new point of view. First, a so-...
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Intervention analysis for fake news diffusion: an evolutionary game theory perspective
Controlling the dissemination of fake news is paramount for societal well-being. This paper explores how to govern fake news on social media, considering the reputation of both government and social media plat...
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Mechanical mechanism and parameter optimization of a tuned inerter damper with delayed fractional-order PID
This paper aims to tackle three challenges in the vibration absorber system with the fractional-order PID, i.e., the rarity of vibration mechanism analysis, limitations in order-taking, and performance enhance...
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Dynamic analysis of gear pairs considering the actual contact state of truncated asperities on the 3D rough surfaces and force-dependent mesh stiffness
Aiming at the problem of calculating the contact characteristics of gear pairs at the mesh position caused by the actual contact state (number, size, position, etc.) of truncated asperities under the action of...
