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7th IEEE International Conference on Electronic Information and Communication technology, ICEICT 2024

作者： Xing, Zikang Liang, Qiuyan Xu, Rui Science and Technology on Electromechanical Dynamic Control Laboratory China Xi'an Institute of Electromechanical Information Technology Xi'an710065 China

ISBN: (纸本)9798350384437

This paper investigates the technology of silicon-based millimeter-wave low noise amplifiers (LNA). The LNA consist of two stages of amplifiers connected in cascade. The first stage circuit achieves low noise performance by utilizing minimum noise input matching. The second stage achieves high gain performance by utilizing high gain output matching.. The LNA in this paper achieves a gain S21 of 16 dB at a center frequency of 36 GHz with a noise figure (NF) as small as 5 dB. © 2024 IEEE.

关键词： Low noise amplifiers

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Flexible piezoelectric wind energy generator

Flexible piezoelectric wind energy generator

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2015 4th International Conference on Computer, Mechatronics, control and Electronic Engineering (ICCMCEE 2015)

作者： Wang Pengyingkai Sui Li Liu Guohua Shi Gengchen Science and technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology

ISBN: (纸本)9781510813465

This paper proposes the scheme of a flexible piezoelectric generator. The generator using direct piezoelectricity of PVDF, can covert wind power to charge output. It possesses such advantages as: light, small-sized and better flexibility. Using FEA method, this paper carries out modal analysis and harmonic response analysis for the generator. From the modal analysis results, we get the generator's the first for modal are 6.95 Hz, 43.51 Hz, 76.06 Hz and 122.84 Hz. From harmonic response analysis results, we get the amplitude-frequency characteristic curve of the generator's output voltage, and the results show that the generator will generate higher voltage when it vibration in second-order than first –order. In order to verify the accuracy of simulation, a series experiments are carried out. Simulation and experiment on the generator proved the reliability in the wind and shows the excellent quality of generating electric energy.

关键词： Piezoelectric generator Wind Flexible FEA method

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Joint radar and communication based on piece-wised LFM signals 4

Joint radar and communication based on piece-wised LFM signa...

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4th International Conference on Defence technology, ICDT 2024

作者： Wang, Xin Duu, Yingsen Zhang, Xiang Wu, Dan Zhang, Ke Xi'an Institute of Electromechanical Information Technology Xi'an China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

Existing joint radar detection and communication(JDC] systems suffer from high peak-to-average power ratiofPAPR] or distance blind spot zones. In this paper, we present a novel JDC system based on piece-wised linear frequency modulation(LFM] signals. Based on the proposed piece-wised LFM modulation signal, the novel JDC system can achieve linear frequency modulation continuous wave(LFMCW) detection, and the PAPR and blind zone issues are solved. Besides, spread spectrum communication can be simultaneously conducted with the same modulation signal. Simulation results show that the proposed JDC system has similar detection performance to the traditional sawtooth LFMCW detection scheme, and the bit-error rate of communication is less than 10~6 when the the bit rate is 500kbps and the signal-to-noise ratio is 10 dB. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Frequency modulation

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Object Detection Based on Digital Twin-Based Road Scenarios 2

Object Detection Based on Digital Twin-Based Road Scenarios

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2nd IEEE International Conference on control, Electronics and Computer technology, ICCECT 2024

作者： Yu, Zhang Huimin, Chen Weihan, Wang Beijing Institute of Technology Science and Technology on Electromechanical Dynamic Control Laboratory Beijing100081 China

ISBN: (纸本)9798350380958

With the rapid development of artificial intelligence and digital technology, digital twins are becoming more and more widely used in various fields, and have high application value in industrial production, architectural design and other fields. There are few datasets of extreme scenarios used in traditional object detection and vehicle autonomous driving training, resulting in unsatisfactory results of object detection and autonomous driving technology in complex environments. In this paper, a digital twin model of the road scene is built based on the rules of City Engine and the Unreal Engine 4 platform, which can be used to build a model of complex road scenes and shorten the model construction cycle. Based on the constructed digital twin model, the target detection task is carried out, and it is verified that the target detection and autonomous driving tests can be carried out in the digital twin model. It provides ideas for solving the problem of insufficient testing of autonomous driving and object detection tasks in complex and extreme scenarios. © 2024 IEEE.

关键词： Object detection

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A Tolerance Precision control Method Based on the Internal and External Double-layer Pressure Screw Limits 4

A Tolerance Precision Control Method Based on the Internal a...

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4th International Conference on Defence technology, ICDT 2024

作者： Sun, Chengcheng Ma, Hongping Tian, Zhongwang Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China Xi'an Institute on Electromechanical Information Technology Xi'an China

In order to solve the problem that the assembly axial clearance of large-diameter mechanical trigger fuze delay device is large in the fuze body, a tolerance precision control method based on the internal and external double-layer pressure screw limits is proposed. The internal and external double-layer screw threads constitute two sets of independent redundant dimensional chains in distribution direction and value. The final assembly accuracy of the delay device is adjusted by the internal and external double-layer pressure screw mutually. The minimum coaxiality deviation of assembly can achieve 0 deviation, and the average accuracy of assembly coaxiality is increased by about 30.69%, which has obvious effect in reducing axis eccentricity. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Screw threads

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Analysis and research of online measurement technology in inner bore of EML 7

Analysis and research of online measurement technology in in...

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2017 7th International Workshop on Computer science and Engineering, WCSE 2017

作者： Cao, Ronggang Dong, Erwa Xu, Xiangcai Beijing Institute of Technology Beijing China Science and Technology on Electromechanical Dynamic Control Laboratory China

ISBN: (纸本)9789811136719

With the development of science and technology, as a new concept weapon electromagnetic gun has important strategic significance. In the process of launch, there are some damages including wear, corrosion, gouging and transition for the rail-gun. In order to study damage mechanism of the electromagnetic rail-gun during launch, it is necessary to detect the bore profile of electromagnetic rail-gun. The bore of rail-gun has the structural characteristics of closed, invisible and narrow space makes inconvenience for the measurement of the contour, so the online measurement and analysis of the rail-gun bore is very important. By comparing different methods of measurement, laser triangle method of non-contact is the heart of the way using in this paper. The laser triangle method has the characteristics of high precision and non-contact, and can realize on-line nondestructive measurement of arbitrary cross section of the rail bore. Through the comparison of the ideal contour and the measured profile of the electromagnetic rail-gun, the damage profile can be obtained. Using this bore profile scanner of electromagnetic rail-gun designed by this method, we can get two-dimensional profile images.

关键词： Nondestructive examination

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Fuze dual-channel ballistic height fusion and prediction algorithm based on FCI-KF 4

Fuze dual-channel ballistic height fusion and prediction alg...

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4th International Conference on Defence technology, ICDT 2024

作者： Wu, Dan Zhang, Ke Wang, Xin Xu, Ruichen Yang, Jingang Xi'an Institute of Electromechanical Information Technology Xi'an China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

To improve the measurement accuracy of the ballistic height and anti-interference ability of fuze in complex environments, the fuze dual-channel ballistic height fusion and prediction algorithm based on Fast Covariance Intersection fusion Kalman Filter (FCI-KF) is proposed. Firstly, the state model and observation model are established, the improved Kalman Filter (KF) algorithm is used to predict the height of the single-channel and then the Fast Covariance Intersection (FCI) algorithm is used to fuse the dual-channel data. This algorithm does not need to calculate the cross-covariance matrix between channels, hence the amount of calculation is small, which is convenient for engineering realization. Finally, the algorithm is simulated and verified, the simulation results show that the measurement accuracy of the proposed algorithm can be significantly improved compared with the original measurement, and the measurement accuracy of the ballistic height is better than that of the traditional methods using only one channel, which verifies the effectiveness of the algorithm. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Kalman filters

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technology of in situ charge promotes the development of MEMS safety and arming device

Technology of in situ charge promotes the development of MEM...

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2012 2nd International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale, 3M-NANO 2012

作者： Jinlong, Zou Xiaojie, Li Yaru, Lei Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China Xi'An Institute of Electromechanical Information Technology Xi'an China

ISBN: (纸本)9781467345897

Based on the reading and the analyzing of relative literatures, this paper introduced basic concepts and fabrication processes of two in situ charge technologies - porous silicon energetic material and converting porous metal to primary explosive based on silicon process, and analyzed the structures and working principles of the micro-donators with two in situ charge technologies. This paper also introduced latest process of explosive train of the MEMS S&A. On these bases, the structure and working principle of silicon MEMS S&A proposed by US army was discussed, and this MEMS S&A is based on in situ charge and suitable for wafer-level mass fabrication. Some views about the development of the silicon MEMS S&A were also put forward. © 2012 IEEE.

关键词： Explosives

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Study on output of LD-pumped passively Q-switched subnanosecond microlasers

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4th International Conference on Optical, Electronic Materials and Applications, OEMA 2013

作者： Cheng, He-Jiao Chen, Hui-Min Cai, De Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing 100081 China

ISBN: (纸本)9783037857342

In recent years, the laser fuze has been widely used in minor caliber mortar projectiles and bombs because of its high accuracy in distance measurement, strong ability to resist electromagnetic interference, high angular resolution and good concealment. As a result, it becomes an irreversible tendency to miniaturize the high power of the laser, especially in military applications. This paper aims to study the factors on the output characteristics of the microlasers. Based on the variation of the inversion density of the particle in the resonant cavity derived from the oscillation equation of the LD-pumped passively Q-switched Cr4+:YAG/ Nd:YAG laser, this paper summarizes some key factors which have impacts on the output of LD-pumped passively Q-switched subnanosecond microlasers, including the initial transmission of the absorber, the reflection of output coupler, the length of the cavity and the radius of the pumping laser beam, and gives the conclusion of the simulation, which provides the basis for the design of the passive Q-switched micro lasers which have high power, high repetition frequency and narrow pulse width. © (2013) Trans Tech Publications, Switzerland.

关键词： Military applications

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Research on leakage current test method

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仪器仪表学报 2014年第S2期35卷 219-223页

作者： Li Dong Wang Yanlin Beijing Key Laboratory of Electromechanical System Measurement and Control Beijing Information Science and Technology University

In the leakage current test, through the high speed data collection and digital filtering to the output voltage of the human body impedance network, leakage current test that is in accordance with many kinds of electrical safety standards can be realized, and the frequency distribution information of the leakage current can be got as well, which can be used to much more completely evaluate the possible damage degree of the leakage current to the human body and analyze the reason for the appearance of the leakage current in the electric equipment.

关键词： leakage current test human body imspedance network

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