检索结果-内蒙古大学图书馆

Design and realization of a polarized laser fuze without blind area

Binggong Xuebao/Acta Armamentarii 2012年第SUPPL2期33卷 312-315页

作者： Chen, Hui-Min Cheng, He-Jiao Cai, De Yang, Yu-Ying Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing 100081 China Department of Arms Engineering Academy of Armored Force Engineering Beijing 100072 China

In traditional pulsed laser fuze systems, the emission and receiving optical systems are independent, causing a blind area, and they have little capacity to resist cloud and interference. To solve these problems, a polarized laser fuze without blind area was designed based on the polarized property of laser. For the new laser fuze, a polarized beam splitter was used to realize a mode in which the emitter and receiver use the same aperture. At the same time, its anti-interference capacity was improved by using a nanosecond laser as emitting source. An experimental system was established, in which 1064 nm polarized laser with pulse duration of 1 ns was used, and a photodetector was used as the receiver. The echo characteristics of different objects within the range of 1 m were obtained.

关键词： Pulsed lasers

来源：评论

学校读者我要写书评

暂无评论

Equivalence study on dynamic simulation test method for fuze inertia arming device

引用

Binggong Xuebao/Acta Armamentarii 2012年第SUPPL2期33卷 321-325页

作者： Lv, Chao Song, Rong-Chang Wang, Jun-Bo Liu, Jun-Jie He, Guang-Lin Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing 100081 China Unit 63961 of PLA Beijing 100012 China Unit 61741 of PLA Beijing 100094 China

Using simulation test method to evaluate the performance of fuze is very helpful to reduce the cost of fuze and also speeds up the fuze research and development. Equivalence of simulation test method and real artillery launch test is a criterion to decide whether the test results are reliable. Fuze inertia arming device is taken as an example. Firstly, an equivalence criterion was proposed according to its working principle. Secondly, a mathematical model of fuze inertia arming device was established. Thirdly, a software simulation of the dynamic response of fuze inertia arming device in a series of simulated artillery launch environments and the real artillery launch environment were accomplished. At last, the simulation data analysis proved the feasibility of equivalence.

关键词： Computer software

来源：评论

学校读者我要写书评

暂无评论

Infrared image edge extraction based on the lateral inhibition network and a new denoising method

Infrared image edge extraction based on the lateral inhibiti...

引用

2012 International Conference on Modelling, Identification and control, ICMIC 2012

作者： Xu, Peng Li, Dong-Guang Cui, Xue-Jun Qin, Guo-Jie National Key Laboratory of Science and Technology on Electomechanical Dynamic Control Beijing Institute Technology China North Institute for Scientific and Technical Information Beijing China School of Information and Electronics Beijing Institute of Technology Beijing China

ISBN: (纸本)9780956715715

The infrared images processing method based on the lateral inhibition network has disadvantages like losing some details of the target or adding noise. Another problem is the parameter of lateral inhibition cannot be chosen adaptively. In the area of infrared guidance, these problems could increase possibility of misrecognition, and lower accuracy of hitting targets. In this paper, we review the theory behind the registration and reconstruction algorithms and their limitations. Because Exponential Function has no parameter to set, this study proposes a method that replaces Gauss Function with Exponential Function to solve the problem of details losing and adaptively image processing. Additionally a method is proposed to remove noise in infrared binary image according to analysis of the neighborhood pixels values of noise point. The results indicate that the method is effective and feasible. © 2012 Huazhong Univ of Sci & Tec.

关键词： Exponential functions

来源：评论

学校读者我要写书评

暂无评论

A Survey on Problems in Smart Grid with Large Capacity Wind Farm Interconnected

引用

Energy Procedia 2012年 17卷 776-782页

作者： Yang Peihong Liu Wenying Wei Yili School of Information Engineering Inner Mongolia University of Science and Technology Baotou China Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control Under Ministry of Education North China Electric Power University Beijing China

The basic concepts and development of smart grid is described. The influence of large capacity wind farm interconnected on the smart grid is analyzed particularly, following contents are emphatically presented: model of wind farm, basic operation performance, output forecasting of wind farm, power flow in smart grid including wind farm, balance of voltage and raeactive power, small disturbance stability, transient stability, faults and reliability, etc., in the hope of offering references for the fast development of smart grids absorbing more capacity of wind power.

关键词： smart grid power system wind farm stability

来源：评论

学校读者我要写书评

暂无评论

Design and application of wireless signal strength measurement system on the near-ground

引用

Journal of Measurement science and Instrumentation 2012年第3期3卷 205-210页

作者：孔祥善师新蕾王代华张志杰 North Automatic Control Technology Institute China North Industries Group Corporation Aero-instrument Co.Ltd. Aviation Industry Corporation of China Key Laboratory of Instrumentation Science and Dynamic Measurement(North University of China) Ministry of Education

The wireless communication system's performance is greatly constrained by the wireless channel characteristics,especially in some specific ***,signal transmission will be greatly impacted even if not in a complicated *** results show that it is hardly to characterize the radio propagation properties for the antenna installed on the *** order to ensure a successful communication,the radio frequency(RF)wireless signal intensity monitor system was *** can get the wireless link transmission loss through measuring signal strength from received *** test shows that the near-ground wireless signal propagation characteristics still can be characterized by the log distance propagation loss *** results will conduce to studying the transmission characteristic of Near-Earth wireless signals and will predict the coverage of the earth's surface wireless sensor network.

关键词： near-ground wireless signal transmission received signal strength test radio frequency(RF)wireless channel modeling

来源：评论

学校读者我要写书评

暂无评论

High-Efficiency Graphene Photo Sensor Using a Transparent Electrode

引用

Chinese Physics Letters 2011年第10期28卷 192-194页

作者： LIU Tao HUANG Zheng National Key Laboratory for Electronic Measurement Technology and Key Laboratory of Instrumentation Science and Dynamic Measurement North University of ChinaTaiyuan 030051 Xi'an Institute of Electromechanical Information Technology Xi'an 710065

We report the first implementation of transparent electrodes in bottom-gate graphene transistors used for photo *** to conventional nontransparent electrodes,the transparent electrodes allow photons to transmit through to the graphene beneath,providing an enlarged absorption area and thereby giving rise to an enhancement of photocurrent *** devices are fabricated with an asymmetric metallization scheme and the experimental results show that the maximum photocurrent density using the transparent electrodes(ITO and Pd/ITO)is over two times higher than that using the nontransparent electrodes(Ti and Pd),indicating a significant enhancement in the performance of graphene photo sensors.

关键词： transparent thereby asymmetric

来源：评论

学校读者我要写书评

暂无评论

Tracking control of a compliant XY nano-positioner under plant uncertainty using a transfigured loop-shaping H∞ controller

Tracking control of a compliant XY nano-positioner under pla...

引用

IEEE International Conference on Automation science and Engineering (CASE)

作者： Hui Tang Yangmin Li Qinmin Yang Department of Electromechanical Engineering Faculty of Science and Technology University of Macau Taipa Macao China Overseas Distinguished Professor at the State Key Laboratory of Robotics of Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Department of Control Science and Engineering Zhejiang University Hangzhou China

This paper presents tracking control of a compliant XY nano-positioner using a transfigured loop-shaping H ∞ (TLSH) control strategy, which is capable of achieving satisfied positioning performance. The employed compliant nano-positioner is featured with a symmetric 4-PP (P represents prismatic joint) structure in which four-bar flexures are designed as the prismatic joints, meanwhile two embedded piezoelectric ceramic actuators (PZT) are adopted. Based on the identified plant transfer function of the nano-positioner, the presented control strategy and the traditional PID controller are implemented with different input scanning frequencies of 0.5 Hz and 2.5 Hz for comparisons. Both the simulation results and the practical experimental results demonstrate that the presented TLSH control method obviously performs better than the traditional PID method in the presence of plant model uncertainty, which will be applied to perform practical micromanipulation tasks.

关键词： Mathematical model Uncertainty Hysteresis Nanobioscience Actuators Robustness

来源：评论

学校读者我要写书评

暂无评论

Evaluation of dual-mode UE MIMO system performance under UE local interference existence

Evaluation of dual-mode UE MIMO system performance under UE ...

引用

Asia-Pacific Conference on Microwave

作者： Hongli Peng Gan Guo Jinlong Zou Junfa Mao Electronic and Engineering Department Shanghai Jiaotong University Shanghai China China Academy of Telecommunication Research MIIT Beijing China Electromechanical Dynamic Control Laboratory Xi'an Science and Technology University Xi'an China

In this paper, a compact triple-band handset antenna (THA) and its three element array are presented for dual-mode user equipment (UE) applications, with their structures designed and performance validated by measurement. Then, based on the obtained electromagnetic parameters, a 2×2 TD-LTE multi-input and multi-output (MIMO) UE system with UE local DCS1800 interference is studied by simulation in such a realistic manner. Under given interference power level, non-linear relation models of the LTE system throughput and the system isolations are achieved, which can be used to evaluate these system performances.

关键词： Interference MIMO Antennas Throughput Arrays Frequency measurement Loss measurement

来源：评论

学校读者我要写书评

暂无评论

ISS-based vehicle yaw stability controller design in backstepping framework

ISS-based vehicle yaw stability controller design in backste...

引用

IEEE Conference on Decision and control

作者： Hongliang Zhou Zhiyuan Liu Hong Chen Department of Control Science and Engineering Harbin Institute of Technology 150001 Harbin China Department of Control Science and Engineering Jilin University (Campus NanLing) and with the National Automobile Dynamic Simulation Laboratory. 130025 Changchun China

ISBN: (纸本)9781612848006

A vehicle yaw stability controller is proposed to make vehicle yaw stable in critical cornering manoeuvres in the paper. Considering vehicle body dynamics, wheel dynamics and tire nonlinear characteristics, a discrete nonlinear time-varying model is firstly constructed, with disturbances standing for tire/road forces estimation error and unmodelled dynamics. Then, the controller is proposed based on sliding mode control in backstepping control framework, in which the control input is calculated step-by-step. The stability of the system is analyzed through input-to-state stability (ISS) theory. Finally, a group of simulations is carried out with a multi-body vehicle dynamics software to evaluate the controller and the results indicate that it can maintain vehicle stable in critical cornering situation.

关键词： course stability control input vehicle controllers backstepping control System stability corners Variable structure systems Backstepping controller design

来源：评论

学校读者我要写书评

暂无评论

Withdrawal of Chinese Physics Letters 28 (2011) 107301 "High-Efficiency Graphene Photo Sensor Using a Transparent Electrode" by LIU Tao and HUANG Zheng

引用

Chinese Physics Letters 2011年第12期28卷 312-312页

The authors withdraw the research paper“High-Efficiency Graphene Photo Sensor Using a Transparent Electrode”,which was published in Chinese Physics Letters 28(10),107301(2011),due to the major mistakes in management and experiment,which led to the authors adopting inappropriate data published without sufficient examination and permission processes.

关键词： Efficiency Photo mistake

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：