检索结果-内蒙古大学图书馆

Intelligent Computing and Human-Computer Interaction (ICHCI), International Conference on

作者： Jian Huo Xu Yang Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing China

ISBN: (纸本)9781665407656

Aiming at solving the problem that the precision of existing algorithms for sparse point cloud image is unsatisfactory, a target recognition algorithm based on the combination of target shape characteristics and LiDAR echo intensity is proposed. By analyzing and processing the linear array scanning data of the target, remove the ground point cloud by using the point cloud elevation information histogram and the adaptive threshold method of the number of point clouds. On this basis, the mathematical morphology algorithm is used to filter the typical nontarget objects. Finally, the algorithm combining the target shape characteristics and echo intensity is used to realize the accurate recognition of the target. The results show that the algorithm is efficient and easy to implement, and has a good recognition effect on sparse point cloud targets.

关键词： Point cloud compression Human computer interaction Histograms Laser radar Target recognition Shape Morphology

来源：评论

学校读者我要写书评

暂无评论

Design, Optimization and Performance Analysis of Permanent Magnet Synchronous Generator for Fuze

Design, Optimization and Performance Analysis of Permanent M...

引用

control, Electronics and Computer technology (ICCECT), IEEE International Conference on

作者： Zhaoxuan Guo Guanglin He Guangsong Ma Yulong Zhang Zenghui Qiao Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing China Xi’an Institute of Electromechanical Information Technology Xi’an China Beijing Electro-Mechanical Engineering Institution Beijing China PLA Strategic Support Force Tianjin China

In order to solve the power supply problem of the fuze on the small-caliber projectile and improve the reliability of the fuze power supply, a miniaturized fuze turbine permanent magnet synchronous generator (PMSG) is designed in this paper, which is a physical power supply driven by wind. In order to improve the electromagnetic performance of the design schemes, this paper proposes a methodology based on dimensional parameters optimization, optimizes the design parameters based on the Rotational Motor Expert (RMxprt) module, and then conducts electromagnetic performance analysis based on the Maxwell 2D module. Finally, according to the performance parameters, the scheme with 6-pole 9-slot mode is selected among the two schemes with different pole-to-slot ratio, its load line voltage is 21.53 V, and the rated load output power is 47.15 W, which meets the design requirements.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Path Planning for Mars Rovers Using Constraint-Based Approach on Path Length and Turning Radius

SSRN

引用

SSRN 2023年

作者： Dai, Juan Li, Jianfeng Zhu, Shengtao Su, Zhong Zhu, Cui Beijing Key Laboratory of High Dynamic Navigation Technology Beijing Information Science & Technology University Beijing100192 China Key Laboratory of Modern Measurement and Control Technology Ministry of Education Beijing100192 China School of Automation Beijing Information Science & Technology University Beijing100192 China School of Information and Communication Engineering Beijing Information Science & Technology University Beijing100101 China

An improved dynamic window approach is proposed for local path planning of the Mars rover based on its constraint characteristics and kinematic model. The dynamic window algorithm is commonly utilized in intelligent rover obstacle avoidance and unmanned driving due to its simple principle and easy implementation. The proposed approach can effectively satisfy the dynamic obstacle avoidance requirements of the Mars rover. However, the traditional dynamic window method may suffer from local motion dead zones and longplanned paths. To resolve the issue of dynamic obstacle avoidance for the Mars rover, a length limitation vector is proposed to alleviate the problem of motion dead zone and enable dynamic obstacle recognition. Moreover, a new dynamic window space is generated by incorporating a turning radius constraint to accommodate the Mars rover’s large turning radius. The evaluation function is optimized to achieve a safe, efficient, and smooth path plan for the Mars rover. © 2023, The Authors. All rights reserved.

关键词： Motion planning

来源：评论

学校读者我要写书评

暂无评论

Near-Field High-Speed Target InISAR Imaging Based on Wavenumber Domain Interpolation

Near-Field High-Speed Target InISAR Imaging Based on Wavenum...

引用

International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Yijiang Chen Guohua Wei Yuzhao Li Xu Wang Jichi Chen School of Information and Electronics Beijing Institute of Technology Beijing China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Remote Sensing Equipment Beijing China

In this paper, a near-field high-speed target InISAR imaging method based on wavenumber domain interpolation is proposed. The focusing of the ISAR image is accomplished by performing Stolt interpolation on the echo signal in the wavenumber domain. Three-dimensional imaging is achieved by interferometric imaging algorithms. The algorithm simulation is carried out using the scattering point model generated by the electromagnetic simulation software, and the validity and stability of the algorithm are verified.

关键词： Interpolation Solid modeling Three-dimensional displays Simulation Software algorithms Electromagnetic scattering Focusing

来源：评论

学校读者我要写书评

暂无评论

Near-field Echo Signal Model of Ground Background Based on Scattering Distribution Function

Near-field Echo Signal Model of Ground Background Based on S...

引用

International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Bo Tian Tie Li Wenhui Hu Sicheng Gao Science and Technology on Electromechanical Dynamic Control Laboratory Xi'anShaanxiChina710061

ISBN: (纸本)9781665418133

Aiming at the problem that the traditional millimeter wave proximity detector model using backscattering coefficients has a large height setting error when the background echo signal quality is poor and the signal-noise ratio is insufficient, a near-field millimeter wave echo signal model based on scattering distribution function for complex feature background is proposed. The model is optimized as an upper half-space scattering distribution function based on the characteristics of feature types to study the near-field scattering functions of soil, vegetation and other backgrounds, and the scattering signals of each microscattering unit in the irradiated area of the detector beam at different moments are calculated in real time by combining with the missile target encounter model, and the echoes received at the detector are obtained in real time after integration. The simulation results show that compared with the traditional method, the model can meet the requirements of detection simulation with higher accuracy of background echo calculation under the condition of lower signal-noise ratio.

关键词： Simulation Millimeter wave technology Scattering Detectors Vegetation Soil Feature extraction

来源：评论

学校读者我要写书评

暂无评论

Fabrication of a Pressure Sensor Using 3d Printed Light-Cured Piezoelectric Composites

SSRN

引用

SSRN 2023年

作者： Wang, Li Ma, Yong Wang, Ke Ma, Yao Lu, Bingheng Niu, Lanjie Li, Xiangyang Micro and Nanotechnology Research Center State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong University Shaanxi Xi'An710049 China Xi'an Institute of Electromechanical Information Technology Xi'An710065 China Science and Technology on Electromechanical Dynamic Control Laboratory China Dongguan University of Technology China

A 0-3 piezoelectric composite material composed of piezoelectric ceramic particles and polymers combines the performance advantages of both components and has broad prospects for applications in piezoelectric pressure sensors, and 3D printing technology provides a good solution for fabricating complex structures of piezoelectric pressure sensors. However, the current research on stereolithography 3D printing for fabricating piezoelectric appliances focuses on the printing of photosensitive piezoelectric composite slurry, and the piezoelectric output of piezoelectric composites prepared with slurry is low due to the low solid content of the slurry, and an inability to stably store the slurry for a prolonged duration. To improve the piezoelectric output performance, this study investigated the material system and structural design of stereolithography 3D printing of piezoelectric composites based on the dispersion stability of the piezoelectric ceramic paste. The results revealed that 72 wt% paste prepared with oleic acid-grafted and modified piezoelectric ceramic particles has good stability, and the piezoelectric voltage constant of the piezoelectric composites fabricated with paste was 220.2 × 10-3Vm‧N-1, and the piezoelectric sensitivity of the piezoelectric composite after topology optimization could reach 30 mV·kPa-1. A conformal pressure sensor prepared using photocuring 3D printing technology can effectively detect the compressive stress of curved surfaces. © 2023, The Authors. All rights reserved.

关键词： Pressure sensors

来源：评论

学校读者我要写书评

暂无评论

Elementary reaction kinetic model of an anode-supported syngas fueled solid oxide fuel cell considering the carbon deposition effect 17

Elementary reaction kinetic model of an anode-supported syng...

引用

17th International Symposium on Solid Oxide Fuel Cells, SOFC 2021

作者： Zhang, R. Wang, Y. Shi, Y. Wang, Y. Cao, H. National Key Laboratory on Electromechanical Dynamic Control Beijing Institute of Technology Beijing100081 China Department of Energy and Power Engineering Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua University Beijing100084 China

ISBN: (纸本)9781607685395

A one-dimensional transient elementary reaction kinetic model of an anode supported solid oxide fuel cell (SOFC) fueled with syngas is developed considering the carbon deposition effect. This model incorporates the coupling effect of heterogeneous elementary chemical and electrochemical reactions, the electrode microstructure and the charge and mass transport processes. The model is validated by both experimental I-V curves and electrochemical impedance spectra. The simulation results agree reasonably well with the experimental data. The numerical results of carbon deposition simulation indicate that the surface carbon coverage can be decreased by increasing the operating temperature and reducing the carbon dioxide, methane or carbon monoxide in the fuel. © 2021 Electrochemical Society Inc.. All rights reserved.

关键词： Carbon monoxide

来源：评论

学校读者我要写书评

暂无评论

Research on the Characteristics of Wireless Power Transfer in Ferromagnetic Metal Pipe 4

Research on the Characteristics of Wireless Power Transfer i...

引用

2020 4th International Conference on Electrical, Mechanical and Computer Engineering, ICEMCE 2020

作者： Li, Changsheng Sun, Wei Hu, Defu Liu, Yong Science and Technology on Electromechanical Dynamic Control Laboratory China Ministerial Key Laboratory of Zndy Nanjing University of Science and Technology Nanjing Jiangsu210094 China

With the development of society, radio energy transmission technology has been paid more and more attention. However, in the actual application environment, the surrounding metal environment has a significant impact on the radio energy transmission performance. Based on the technology of MRR radio energy transmission, this paper establishes a two coil radio energy transmission model, and analyzes the influence of metal environment on the coil self inductance L, mutual inductance m and coil resistance R of the radio energy transmission system by finite element simulation. On this basis, aiming at the ferromagnetic metal environment, the steel pipe is selected as the research object to study the relationship between coil diameter and mutual inductance in the metal pipe, and the relationship between coil diameter and metal pipe diameter when the maximum mutual inductance is obtained through fitting analysis. At the same time, through the experiment, the mutual inductance between the coils of the wireless energy system in the steel tube is verified, and the experimental results are very consistent with the theory. © Published under licence by IOP Publishing Ltd.

关键词： Ferromagnetic materials

来源：评论

学校读者我要写书评

暂无评论

Research on the characteristics of wireless power transfer in non-ferromagnetic metal pipe

Research on the characteristics of wireless power transfer i...

引用

2020 International Symposium on Electronic Information technology and Communication Engineering, ISEITCE 2020

作者： Li, Changsheng Liu, Yong Hu, Defu Sun, Wei Science and Technology on Electromechanical Dynamic Control Laboratory China Ministerial Key Laboratory of Zndy Nanjing University of Science and Technology Nanjing Jiangsu210094 China

With the development of various electronics, the way of transmitting energy by wire has brought increasingly negative effects on the operability and convenience of products. As wireless power transfer (WPT) technology requires no transmission lines, it has received increasingly wide attention. Most of the previous research on the technology of magnetic resonant coupling WPT mainly focused on the transmission of energy in the air. This paper establishes the wireless power transfer system model under non-ferromagnetic metallic environment and studies the effect of non-ferromagnetic metallic environment on coil self-inductance L, mutual inductance M and coil resistance R of WPT system. On this basis, the study on the relationship between coil diameter and mutual inductance is carried out for aluminium pipe, and the relationship between coil diameter and diameter of metal pipe at the maximum mutual inductance is fitted. Besides, experimental verification is conducted for the change of mutual inductance between the coils of WPT system in the aluminium pipe, presenting that the actual measurement results of mutual inductance in the aluminium pipe are consistent with the theory. © Published under licence by IOP Publishing Ltd.

关键词： Ferromagnetic materials

来源：评论

学校读者我要写书评

暂无评论

Microfluidic inertial switch with delay response characteristics 2

Microfluidic inertial switch with delay response characteris...

引用

2nd Spring International Conference on Defence technology, ICDT 2020

作者： Nie, Weirong Liu, Guowei Zhang, Runduo School of Mechanical Engineering Nanjing University of Science and Technology Nanjing China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

This paper proposes an innovation microfluidic inertial switch structure with precise time delay response characteristic, which can be used in the fuze safety and arming system. The switch works on the principle of fluidic inertial force and capillary valve, which makes it sensitive to the unidirection acceleration load and has the ability to recognize the acceleration amplitude. The microfluidic inertial switch has a structure of a J-shaped reservoir, capillary valves, a serpentine delay microchannel and a U-shaped latching microchannel. The acceleration threshold is analyzed theoretically considering the surface tension coefficient of the gas-liquid interface. The delay response time of the switch is studied by finite element simulation based on the Gambit 2.4 and Fluent 6.3 software. The prototype is fabricated by wet etching technology and magnetron sputtering metal technology. Many tests have been done to verify the functions of the switch. The experimental results are matched well to the results of calculation and simulation. When the capillary valve throat widths are 80μm, 120μm, 160μm, the thresholds of the switch are 75.1g, 46.6g, 36.5g. When the switch is loaded with a 75g acceleration load, the delay response is 146.7ms. Finite element simulation and experimental results show that the switch can effectively identify the acceleration threshold, and can achieve a precise delay response under a certain load. © Published under licence by IOP Publishing Ltd.

关键词： Microchannels

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：