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Wen Gao, Yanqiang Bi, Xiyuan Li, Apeng Dong, Jing Wang and Xiaoning Yang
Hybrid airships, combining aerodynamic lift and buoyant lift, are efficient near-space aircraft for scientific exploration, observation, and surveillance. Compared to conventional airplanes and airships, hybrid airships offer unique advantages, including...
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Rong Li, Zhengliang Yang, Gaowei Yan, Long Jian, Guoqiang Li and Zhiqiang Li
This paper uses the adaptive dynamic programming (ADP) method to achieve optimal trajectory tracking control for quadrotors. Relying on an established mathematical model of a quadrotor, the approximate optimal trajectory tracking control, which consists ...
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Deli Jiang, Xuegeng Chen, Limin Yan, Jinhao Zhang, Tao Wu and Xuanhe Fu
Compared with the conventional horizontal conveyor-chain-type plastic-film-picking device, the longitudinal nail-tooth-chain-plate-type plastic-film-picking device developed by our team in the early stage has little tearing effect on the mulching film, a...
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Su-Jin Choi, Hongjae Kang, Keejoo Lee and Sejin Kwon
The Korean National Space Council recently released ?Mars Exploration 2045? as part of its future strategic plan. The operations for a Mars explorer can be defined based on domestically available capabilities, such as ground operations, launch, in-space ...
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Giovanni Mengali and Alessandro A. Quarta
A close observation of the near-Sun region, with in situ measurements, requires that a scientific probe be placed in a heliocentric orbit with a perihelion distance on the order of a few solar radii only. This is the solution adopted by the Parker Solar ...
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Pureum Kim and Sang-Young Park
This study investigates the preliminary trajectory design for high-thrust missions to near-Earth asteroids (NEAs), considering distance and phase angle constraints during the approaching phase to enable pre-rendezvous optical navigation and the scientifi...
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Shenghao Ye, Xinyu Xue, Shuning Si, Yang Xu, Feixiang Le, Longfei Cui and Yongkui Jin
Although there are existing interplant weed control devices for soybeans, they mostly rely on image recognition and intelligent navigation platforms. Simultaneously, automated weed control devices are not yet fully mature, resulting in issues such as hig...
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Yang Liu, Xintong Li, Pengcheng Wang, Xiaotian Zhang, Hao Zhu and Guobiao Cai
This paper proposed a multi-objective, multi-disciplinary design optimization and multi-attribute evaluation method for the manned lunar lander descent stage. A system design model is established considering multiple disciplines such as propulsion, struc...
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Xindan Qiao, Dequan Liu, Xiaolei Wang, Wang Li, Jiawei Wang and Decong Zheng
This article focuses on the low accuracy, poor stability, and other shortcomings of the traditional outer-groove buckwheat seed-metering wheel. A wheel-type large-ridge double-row seed-metering device with inner seed-filling holes was designed. The seed-...
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Xun Zhang, Ziqi Wang, Huijun Chen and Hao Ding
The control strategy of an underdriven unmanned underwater vehicle (UUV) equipped with front sonar and actuator faults in a continuous task environment is investigated. Considering trajectory tracking and local path planning in complex-obstacle environme...
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