检索结果-内蒙古大学图书馆

7th Chinese Conference on Swarm Intelligence and Cooperative Control, CCSICC 2023

作者： Fan, Yunfeng He, Shaoying Zhang, Xu Zhang, Mengjun Wei, Bingzhuo Shanghai Institute of Mechanical and Electrical Engineering Shanghai201109 China Nanjing University of Aeronautics and Astronautics Nanjing210016 China Key Laboratory of Avionics System Integration Technology China National Aeronautical Radio Electronics Research Institute Shanghai200233 China

ISBN: (纸本)9789819733279

In the scenarios of robot work, there are a large number of collaborative operation tasks. How to synchronize the control of robots to track a given trajectory in order to reduce errors is a problem in robot collaborative control. Considering the cooperative tracking problem of rigid and soft hybrid robots, an iterative learning predictive control is proposed. This strategy utilizes the camera feedback to track the trajectory, employs predictive control to handle the problem of tracking trajectory and the constraint problem in the hybrid robot. To reduce the uncertainty of the model, an input mapping method is proposed to accelerate the convergence of the control performance. Finally, based on this framework, the rigid and soft robots can eliminate the tracking error of the trajectory, simultaneously. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Trajectories

来源：评论

学校读者我要写书评

暂无评论

Research On Stability Characteristics Of Three-Wheel Refrigeration system

Research On Stability Characteristics Of Three-Wheel Refrige...

引用

2022 CSAA/IET International Conference on Aircraft Utility systems, AUS 2022

作者： Zhou, Yue Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing211106 China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

Simulation on three-wheel refrigeration system is carried out, the result of which is compared with the existing research data. Further, the temperature disturbance characteristics of the system is analysed combined with the main system disturbance source. Simulation results indicate that the temperature or moisture of the bleed air or ram air disturbance brings changes of system outlet temperature, the degree of which agrees with the disturbance element. Meanwhile the bleed air pressure disturbance to the three-wheel refrigeration system influence is most intense. This paper provides reference for the design and optimization of the environmental control system. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Environmental management

来源：评论

学校读者我要写书评

暂无评论

The Simulation Analysis of a Control Strategy for the Multi-Cabin Helicopter Vapor Compression Cycle system with the Amesim

The Simulation Analysis of a Control Strategy for the Multi-...

引用

2022 CSAA/IET International Conference on Aircraft Utility systems, AUS 2022

作者： Deng, Weishi Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing211106 China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

In order to improve the dynamic temperature regulation performances of a vapor compression cycle in multi-cabin helicopter, a control strategy is proposed and theoretically evaluated by using Amesim software. A model for a vapor compression cycle system of a certain type helicopter is established to verify this strategy. Dynamic response performances of the system when the cabin heat load sharply increases or decreases are studied. Results found that the target temperature can be controlled within ± 1 °C, which shows the system has a good dynamic response by using the strategy. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Dynamic response

来源：评论

学校读者我要写书评

暂无评论

Aeronautical Communication Traffic Simulation Based on Kernel Density Estimation Method 12

Aeronautical Communication Traffic Simulation Based on Kerne...

引用

12th IEEE Asia-Pacific Conference on Antennas and Propagation, APCAP 2024

作者： Zhang, Yingxi Jiang, Dapeng Shao, Fengwei Wu, Tong Liang, Xianling Chen, Jingfeng China Ship Development and Design Center Wuhan China Shanghai Spacecom Satellite Technology Ltd. Shanghai China Shanghai Jiao Tong University Shanghai China State Key Laboratory of Avionics Integration and Aviation System-of-Systems Synthesis China

ISBN: (纸本)9798350351019

Low Earth Orbit (LEO) satellite networks have been emerging as a revolutionary solution for ubiquitous communication in the upcoming sixth generation (6 G) wireless communication network. Efficient resource allocation in these satellite networks requires precise analysis of communication traffic demand. To simulate an accurate representation of the spatial-temporal communication traffic pattern worldwide, this paper utilizes Kernel Density Estimation (KDE) to simulate aircraft positions and employs a time-varying communication intensity model. The effectiveness of this approach is validated through numerical simulation results. © 2024 IEEE.

关键词： Satellite communication systems

来源：评论

学校读者我要写书评

暂无评论

Position Measurement Based Slave Torque Feedback Control for Teleoperation systems With Time-Varying Communication Delays

引用

IEEE/CAA Journal of Automatica Sinica 2023年第2期10卷 388-402页

作者： Xian Yang Jing Yan Changchun Hua Xinping Guan the Institute of Information Science and Engineering Yanshan University the Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Qinhuangdao 066004China IEEE the Institute of Electrical Engineering Yanshan UniversityQinhuangdao 066004China the Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China

Bilateral teleoperation system is referred to as a promising technology to extend human actions and intelligence to manipulating objects *** the tracking control of teleoperation systems,velocity measurements are necessary to provide feedback ***,due to hardware technology and cost constraints,the velocity measurements are not always *** addition,the time-varying communication delay makes it challenging to achieve tracking *** paper provides a solution to the issue of real-time tracking for teleoperation systems,subjected to unavailable velocity signals and time-varying communication *** order to estimate the velocity information,immersion and invariance(I&I)technique is employed to develop an exponential stability velocity *** the proposed velocity observer,a linear relationship between position and observation state is constructed,through which the need of solving partial differential and certain integral equations can be ***,the mean value theorem is exploited to separate the observation error terms,and hence,all functions in our observer can be analytically *** the estimated velocity information,a slave-torque feedback control law is presented.A novel Lyapunov-Krasovskii functional is constructed to establish asymptotic tracking *** particular,the relationship between the controller design parameters and the allowable maximum delay values is ***,simulation and experimental results reveal that the proposed velocity observer and controller can guarantee that the observation errors and tracking error converge to zero.

关键词： Asymptotic stability bilateral teleoperation time-varying delay velocity observer

来源：评论

学校读者我要写书评

暂无评论

Cooperative attack–defense decision-making of multi-UAV using satisficing decision-enhanced wolf pack search algorithm

引用

Soft Computing 2024年第17-18期28卷 9575-9586页

作者： Zhou, Tongle Chen, Mou Wang, Yuhui Zhu, Ronggang Yang, Chenguang College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing211106 China Key Laboratory of Avionics System Integrated Technology Shanghai200241 China Science and Technology on Electro-optic Control Laboratory Luoyang Institute of Electro-Optical Equipment of Avic Luoyang471000 China Bristol Robotics Laboratory University of the West of England BristolBS16 1QY United Kingdom

Unmanned aerial vehicles (UAVs) have shown their superiority for applications in complicated military missions. A cooperative attack–defense decision-making method based on satisficing decision-enhanced wolf pack search (SDEWPS) algorithm is developed for multi-UAV air combat in this paper. Firstly, the multi-UAV air combat mathematical model is provided and the attack–defense decision-making constraints are defined. Besides the traditional air combat situation, the capability of UAVs and target information including target type and target intention are all considered in this paper to establish the air combat superiority function. Then, the wolf pack search (WPS) algorithm is used to solve the attack decision problem. To improve efficiency, the satisficing decision theory is employed to enhance the WPS to obtain the satisficing solution rather than optimal solution. The simulation results show that the developed method can realize the cooperative attack decision-making. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Decision making

来源：评论

学校读者我要写书评

暂无评论

Electromagnetic Design of a Six-Phase Low-Inertia Fault-Tolerant Permanent Magnet Synchronous Machine 7

Electromagnetic Design of a Six-Phase Low-Inertia Fault-Tole...

引用

7th IEEE International Electrical and Energy Conference, CIEEC 2024

作者： Zhou, Ziyu Sui, Yi Qiu, Xiaoying Zheng, Ping Ma, Hui School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China Avic Nanjing Engineering Institute of Aircraft Systems Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9798350359558

Multiphase permanent magnet (PM) synchronous machine features the advantages of high reliability and high fault-tolerant capability, which has great potential in the fields like aviation servo and electric vehicles. In order to meet the design criteria of low moment of inertia and high post-fault torque performance, three different rotor structures are analyzed and compared for a low-inertia fault-tolerant permanent magnet synchronous machine(SLIFT-PMSM) by finite-element method. The influence of winding structure on torque performance is investigated, and the winding structure is optimized to improve the post-fault torque performance. The electromagnetic performance of the improved scheme is evaluated under both the normal and fault conditions. © 2024 IEEE.

关键词： Permanent magnets

来源：评论

学校读者我要写书评

暂无评论

Study on Performance of Autonomous Power Generation and Refrigeration system of the Jamming Pod

Study on Performance of Autonomous Power Generation and Refr...

引用

2022 CSAA/IET International Conference on Aircraft Utility systems, AUS 2022

作者： Luo, Kun Lv, Baohua Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration ShuiGe Road Nanjing China China Avionics Systems co. Itd Shuguangxili Courtyard Beijing China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

The traditional electronic jamming pod depends on the power supply of the carrier. Limited by the power supply of the carrier, its ability of electronic jamming is weak, and the difference between the power supply system of the pod and the carrier makes the loading flexibility of the electronic jamming pod poor, which restricts the improvement of the performance of the electronic jamming pod. Under this background, this paper puts forward three schemes of autonomous power generation and refrigeration integrated system of electronic jamming pod. Based on the proposed system scheme, the system simulation model is established to simulate and compare the maximum effective power generation and refrigeration capacity of electronic jamming pod in the whole flight envelope and the fuel penalty of the system in the whole mission curve. The results show that the maximum effective power generation of system scheme 1 is greater under the same working conditions in the whole flight envelope, and the overall cooling capacity of system scheme 3 is stronger. Under certain power generation and cooling demand, the applicable flight envelope range of system scheme 1 is larger when the altitude is more than 4000m, while the total fuel penalty of system scheme 1 is smaller for the given flight mission curve. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Fuels

来源：评论

学校读者我要写书评

暂无评论

UAV-Assisted Dynamic Avatar Task Migration for Vehicular Metaverse Services: A Multi-Agent Deep Reinforcement Learning Approach

引用

IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 430-445页

作者： Jiawen Kang Junlong Chen Minrui Xu Zehui Xiong Yutao Jiao Luchao Han Dusit Niyato Yongju Tong Shengli Xie IEEE School of Automation Guangdong University of TechnologyGuangzhou 510006China 111 Center for Intelligent Batch Manufacturing based on IoT Technology Guangzhou 510006China Key Laboratory of Intelligent Information Processing and System Integration of IoT Ministry of EducationGuangzhou 510006China School of Computer Science and Engineering Nanyang Technological UniversitySingaporeSingapore Pillar of Information Systems Technology and Design Singapore University of Technology and DesignSingaporeSingapore College of Communication Engineering Army Engineering University of PLANanjing 210007China National Natural Science Foundation of China Beijing 100085China Key Laboratory of Intelligent Detection and IoT in Manufacturing Ministry of EducationGuangzhou 510006China Guangdong Key Laboratory of IoT Information Technology Guangzhou 510006China

Avatars, as promising digital representations and service assistants of users in Metaverses, can enable drivers and passengers to immerse themselves in 3D virtual services and spaces of UAV-assisted vehicular Metaverses. However, avatar tasks include a multitude of human-to-avatar and avatar-to-avatar interactive applications, e.g., augmented reality navigation,which consumes intensive computing resources. It is inefficient and impractical for vehicles to process avatar tasks locally. Fortunately, migrating avatar tasks to the nearest roadside units(RSU)or unmanned aerial vehicles(UAV) for execution is a promising solution to decrease computation overhead and reduce task processing latency, while the high mobility of vehicles brings challenges for vehicles to independently perform avatar migration decisions depending on current and future vehicle status. To address these challenges, in this paper, we propose a novel avatar task migration system based on multi-agent deep reinforcement learning(MADRL) to execute immersive vehicular avatar tasks dynamically. Specifically, we first formulate the problem of avatar task migration from vehicles to RSUs/UAVs as a partially observable Markov decision process that can be solved by MADRL algorithms. We then design the multi-agent proximal policy optimization(MAPPO) approach as the MADRL algorithm for the avatar task migration problem. To overcome slow convergence resulting from the curse of dimensionality and non-stationary issues caused by shared parameters in MAPPO, we further propose a transformer-based MAPPO approach via sequential decision-making models for the efficient representation of relationships among agents. Finally, to motivate terrestrial or non-terrestrial edge servers(e.g., RSUs or UAVs) to share computation resources and ensure traceability of the sharing records, we apply smart contracts and blockchain technologies to achieve secure sharing management. Numerical results demonstrate that the proposed approach

关键词： Avatar blockchain metaverses multi-agent deep reinforcement learning transformer UAVs

来源：评论

学校读者我要写书评

暂无评论

A cloud-edge-device collaborative offloading scheme with heterogeneous tasks and its performance evaluation

引用

Frontiers of Information technology & Electronic Engineering 2024年第5期25卷 664-684页

作者： Xiaojun BAI Yang ZHANG Haixing WU Yuting WANG Shunfu JIN School of Information Science and Engineering Yanshan UniversityQinhuangdao 066004China Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province Yanshan UniversityQinhuangdao 066004China

How to collaboratively offload tasks between user devices,edge networks(ENs),and cloud data centers is an interesting and challenging research *** this paper,we investigate the offoading decision,analytical modeling,and system parameter optimization problem in a collaborative cloud-edge device environment,aiming to trade off different performance *** to the differentiated delay requirements of tasks,we classify the tasks into delay-sensitive and delay-tolerant *** meet the delay requirements of delay-sensitive tasks and process as many delay-tolerant tasks as possible,we propose a cloud-edge device collaborative task offoading scheme,in which delay-sensitive and delay-tolerant tasks follow the access threshold policy and the loss policy,*** establish a four-dimensional continuous-time Markov chain as the system *** using the Gauss-Seidel method,we derive the stationary probability distribution of the system ***,we present the blocking rate of delay-sensitive tasks and the average delay of these two types of *** experiments are conducted and analyzed to evaluate the system performance,and numerical simulations are presented to evaluate and validate the effectiveness of the proposed task offloading ***,we optimize the access threshold in the EN buffer to obtain the minimum system cost with different proportions of delay-sensitive tasks.

关键词： Edge computing Ofloading scheme Cloud-edge device collaboration Markov chain Cost function

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：