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Management and Practice of Large-Scale Modern Coal Enterprises
An Wang
《工程管理前沿(英文)》 2014年 第1卷 第1期 页码 13-17 doi: 10.15302/J-FEM-2014004
关键词: coal industry sustainable development the four-orientation model
Four-protein model for predicting prognostic risk of lung cancer
《医学前沿(英文)》 2022年 第16卷 第4期 页码 618-626 doi: 10.1007/s11684-021-0867-0
基于增益调度控制和高保真飞机模型的实时四维轨迹生成 Article
Olusayo Obajemu, Mahdi Mahfouf, Lohithaksha M. Maiyar, Abrar Al-Hindi, Michal Weiszer, Jun Chen
《工程(英文)》 2021年 第7卷 第4期 页码 495-506 doi: 10.1016/j.eng.2021.01.009
Aircraft ground movement plays a key role in improving airport efficiency, as it acts as a link to all other ground operations. Finding novel approaches to coordinate the movements of a fleet of aircraft at an airport in order to improve system resilience to disruptions with increasing autonomy is at the center of many key studies for airport airside operations. Moreover, autonomous taxiing is envisioned as a key component in future digitalized airports. However, state-of-the-art routing and scheduling algorithms for airport ground movements do not consider high-fidelity aircraft models at both the proactive and reactive planning phases. The majority of such algorithms do not actively seek to optimize fuel efficiency and reduce harmful greenhouse gas emissions. This paper proposes a new approach for generating efficient four-dimensional trajectories (4DTs) on the basis of a high-fidelity aircraft model and gainscheduling control strategy. Working in conjunction with a routing and scheduling algorithm that determines the taxi route, waypoints, and time deadlines, the proposed approach generates fuel-efficient 4DTs in real time, while respecting operational constraints. The proposed approach can be used in two contexts: ① as a reactive decision support tool to generate new trajectories that can resolve unprecedented events; and ② as an autopilot system for both partial and fully autonomous taxiing. The proposed methodology is realistic and simple to implement. Moreover, simulation studies show that the proposed approach is capable of providing an up to 11% reduction in the fuel consumed during the taxiing of a large Boeing 747 jumbo jet.
关键词: Aircraft model Intelligent taxiing Optimization Four-dimensional trajectory
Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI
《结构与土木工程前沿(英文)》 2022年 第16卷 第11期 页码 1424-1435 doi: 10.1007/s11709-022-0870-9
关键词: ECC fiber orientation distribution casting direction casting position
Landing control method of a lightweight four-legged landing and walking robot
《机械工程前沿(英文)》 2022年 第17卷 第4期 doi: 10.1007/s11465-022-0707-1
关键词: landing and walking robot lunar exploration buffer landing compliance control
Crystallographic orientation effect on cutting-based single atomic layer removal
Wenkun XIE, Fengzhou FANG
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 631-644 doi: 10.1007/s11465-020-0599-x
关键词: ACSM single atomic layer removal mechanism crystallographic orientation effect mechanical cutting Manufacturing III
Xiaolong ZHANG, Yu HUANG, Shuting WANG, Gen LI, Yuanlong XIE, Wei MENG
《机械工程前沿(英文)》 2021年 第16卷 第3期 页码 504-527 doi: 10.1007/s11465-020-0626-y
关键词: mobile robot multiple maneuvering mode motion planning tracking control receding horizon control
Tomographic diagnosis of defects in hydraulic concrete structure
ZHAO Mingjie, XU Xibin
《结构与土木工程前沿(英文)》 2008年 第2卷 第3期 页码 226-232 doi: 10.1007/s11709-008-0027-5
关键词: satisfactory processing orientation tomographic diagnosis orientation perpendicular
Pollution of NPEOs in four municipal sewage treatment plants in the north of China
HOU Shaogang, SUN Hongwen
《环境科学与工程前沿(英文)》 2007年 第1卷 第2期 页码 196-201 doi: 10.1007/s11783-007-0034-0
Planar jumping with stable landing through foot orientation design and ankle joint control
Qilong YUAN, I-Ming CHEN
《机械工程前沿(英文)》 2012年 第7卷 第2期 页码 100-108 doi: 10.1007/s11465-012-0318-3
This paper introduces a method to generate the planar jumping motion for biped robot. In this work, through determining the upper body posture trajectory in the flight phase, the foot landing posture is made to be flat while landing. Together with properly designing the trajectory for local center of gravity and the foot landing velocity, the soft landing trajectory is generated. A controller on the ankle joint is added to avoid significant impact with the ground and stabilize the robot after landing. Jumping motion with stable landing is achieved in a dynamic simulation environment based on this method.
关键词: biped jumping stable landing control jumping motion generation
Nonlinear dynamics and analysis of a four-bar linkage with clearance
Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU
《机械工程前沿(英文)》 2013年 第8卷 第2期 页码 160-168 doi: 10.1007/s11465-013-0258-6
In this paper, nonlinear dynamic behavior of a four-bar linkage considering clearance is studied. The dynamic model of the linkage with a clearance between coupler and rocker is developed firstly. Then the dynamic equations of this mechanism are solved by a numerical method. According to the calculated response, compliance, force and trajectory of pin in joint bearing are obtained. Effects of clearance magnitude and the relationship between a mechanism with clearance and without clearance are studied. By using Poincare Map, it is proved that strange attractors or chaos exist in the dynamic response. In addition, phenomena of chaos, periodic response and subharmonic response also can be found in the special condition. Bifurcation diagram is used to suggest that bifurcation and fractal phenomena exist in the dynamic response of this mechanism.
关键词: four-bar linkage chaos bifurcation strange attractors dynamics
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-022-0737-8
关键词: selective laser melting (SLM) build orientation determination multi-feature mechanical part (MFMP) fuzzy analytical hierarchy process multi-objective decision making (MODM)
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0753-3
关键词: four-wheeled mobile robot obstacle-circumventing adaptive control adaptive anti-disturbance terminal sliding mode control sub-target dynamic tracking regression obstacle avoidance
System construction of a four-side primary permanent-magnet linear motor drive mechanical press
Jintao LIANG, Zhengfeng MING, Peida LI
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 600-609 doi: 10.1007/s11465-020-0597-z
关键词: mechanical press direct drive primary permanent-magnet linear motor (PPMLM) servo system active disturbance rejection control (ADRC) prototype experiment
Performance investigation of artificial intelligence based controller for three phase four leg shunt
J. JAYACHANDRAN,R. MURALI SACHITHANANDAM
《能源前沿(英文)》 2015年 第9卷 第4期 页码 446-460 doi: 10.1007/s11708-015-0378-2
关键词: neural network DSTATCOM neutral current mitigation total harmonic distortion (THD) three phase four wire distribution system unbalanced and/or distorted source
标题 作者 时间 类型 操作
基于增益调度控制和高保真飞机模型的实时四维轨迹生成
Olusayo Obajemu, Mahdi Mahfouf, Lohithaksha M. Maiyar, Abrar Al-Hindi, Michal Weiszer, Jun Chen
期刊论文
Numerical investigation of the influence of casting techniques on fiber orientation distribution in ECC
Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI
期刊论文
Crystallographic orientation effect on cutting-based single atomic layer removal
Wenkun XIE, Fengzhou FANG
期刊论文
Motion planning and tracking control of a four-wheel independently driven steered mobile robot with multiple
Xiaolong ZHANG, Yu HUANG, Shuting WANG, Gen LI, Yuanlong XIE, Wei MENG
期刊论文
Pollution of NPEOs in four municipal sewage treatment plants in the north of China
HOU Shaogang, SUN Hongwen
期刊论文
Planar jumping with stable landing through foot orientation design and ankle joint control
Qilong YUAN, I-Ming CHEN
期刊论文
Nonlinear dynamics and analysis of a four-bar linkage with clearance
Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU
期刊论文
Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective
期刊论文
Obstacle-circumventing adaptive control of a four-wheeled mobile robot subjected to motion uncertainties
期刊论文
System construction of a four-side primary permanent-magnet linear motor drive mechanical press
Jintao LIANG, Zhengfeng MING, Peida LI
期刊论文