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Future Model for Efficient and Advanced Space Transportation: Exploration and Perspectives [PDF]

open access: yesResearch
Current space transportation employs a multistage rocket system to deliver the payload to its destination in a single launch, and this integrated model significantly constrains payload capacity for medium-high earth orbits and deep-space missions ...
Haipeng Chen   +4 more
doaj   +2 more sources

Progress and Bottlenecks in Large-Scale Commercial Space Transportation Systems [PDF]

open access: yesResearch
With global space activities shifting from an exploration-oriented focus to large-scale development and utilization, low-cost, “airline-mode”, and high-capability space transportation capabilities have become the critical foundation for supporting the ...
Xiaowei Wang, Zhengyu Song, Weimin Bao
doaj   +2 more sources

Guidance and Control Method for Vehicle with Strap-down Seeker [PDF]

open access: yesMATEC Web of Conferences, 2019
Guidance and control method was presented in this paper for flight vehicle with a strap-down seeker. Firstly, an extended Kalman filter was constructed in LOS (line of sight) coordinate system to estimate the guidance signal based on the information ...
Fugui Li   +6 more
doaj   +1 more source

Mixed Sensitivity Servo Control of Active Control Systems

open access: yesMachines, 2022
The aircraft control system of the future will be a combination of fly-by-wire technology and Active Control System (ACS) which, based on the artificial feel system, provides a control strategy for both position and force. The ACS has uncertainties, such
Yanjun Zhou   +3 more
doaj   +1 more source

A Novel Robust Adaptive Backstepping Method Combined with SMC on Strict-Feedback Nonlinear Systems Using Neural Networks [PDF]

open access: yesMATEC Web of Conferences, 2019
Adaptive backstepping methodology is a powerful tool for nonlinear systems, especially for strict-feedback ones, but its robustness still needs improvements.
Li Yahui   +7 more
doaj   +1 more source

Remaining useful life prognostics of lithium-ion batteries based on a coordinate reconfiguration of degradation trajectory and multiple linear regression

open access: yesFrontiers in Energy Research, 2023
Lithium battery has been widely applied as new energy to cope with pressures in both form environment and energy. The remaining useful life (RUL) prognostics of lithium-ion batteries have become more critical.
Zhiwei Chen   +5 more
doaj   +1 more source

Research on Aircraft Attitude Control Method Based on Linear Active Disturbance Rejection

open access: yesInternational Journal of Aerospace Engineering, 2022
In this paper, a dual-loop active disturbance rejection attitude controller design method is proposed for the attitude control of aircraft. Firstly, based on the nonlinear dynamic model of aircraft, the control system model with inner loop as angular ...
Zhiguo Song   +5 more
doaj   +1 more source

Efficient Non-Uniform Pilot Design for TDCS

open access: yesSensors, 2021
The Internet of Things (IoT) leads the era of interconnection, where numerous sensors and devices are being introduced and interconnected. To support such an amount of data traffic, wireless communication technologies have to overcome available spectrum ...
Cheng Chang   +4 more
doaj   +1 more source

Thermal performance evaluation of latent heat storage systems with plate fin-metal foam hybrid structure

open access: yesCase Studies in Thermal Engineering, 2021
The thermal performance of phase change materials (PCM) embedded with fins and metal foam is investigated. Plate fins are attached to the enclosure, and metal foam is embedded between adjacent fins to enhance heat transfer.
Chen Ding, Liang Wang, Zhiling Niu
doaj   +1 more source

Damage Boundary Study of Crystal Oscillators under Shock Environment

open access: yesShock and Vibration, 2020
The crystal oscillator is a widely used electronic component in a circuit, whose accuracy is strongly affected by the external mechanical environment. To depict the failure mechanism of the crystal oscillator, the damage boundary of this component under ...
Changjian Zhao   +5 more
doaj   +1 more source

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