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IEEE International Conference on Electronic Information and Communication technology (ICEICT)

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

ISBN: (数字)9798350384437

ISBN: (纸本)9798350384444

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.

关键词： Low-noise amplifiers Noise figure Millimeter wave circuits Impedance matching Noise CMOS technology Silicon

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A sparse moving array imaging approach for FMCW radar with dual-aperture adaptive azimuth ambiguity suppression and adaptive QR decomposition

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Defence technology 2025年

作者： Han, Yanwen Yan, Xiaopeng Wang, Jiawei Zheng, Sheng Yu, Hongrui Dai, Jian Science and Technology on Electromechanical Dynamic Control Laboratory School of Mechatronical Engineering Beijing Institute of Technology Beijing100081 China

Range-azimuth imaging of ground targets via frequency-modulated continuous wave (FMCW) radar is crucial for effective target detection. However, when the pitch of the moving array constructed during motion exceeds the physical array aperture, azimuth ambiguity occurs, making range-azimuth imaging on a moving platform challenging. To address this issue, we theoretically analyze azimuth ambiguity generation in sparse motion arrays and propose a dual-aperture adaptive processing (DAAP) method for suppressing azimuth ambiguity. This method combines spatial multiple-input multiple-output (MIMO) arrays with sparse motion arrays to achieve high-resolution range-azimuth imaging. In addition, an adaptive QR decomposition denoising method for sparse array signals based on iterative low-rank matrix approximation (LRMA) and regularized QR is proposed to preprocess sparse motion array signals. Simulations and experiments show that on a two-transmitter-four-receiver array, the signal-to-noise ratio (SNR) of the sparse motion array signal after noise suppression via adaptive QR decomposition can exceed 0 dB, and the azimuth ambiguity signal ratio (AASR) can be reduced to below −20 dB. © 2025 China Ordnance Society

关键词： Signal to noise ratio

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Research on tolerance optimization method for aircraft thin-walled components based on improved particle swarm optimization algorithm 10

Research on tolerance optimization method for aircraft thin-...

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2024 10th International Forum on Manufacturing technology and Engineering Materials, ICMTEM 2024

作者： Xue, Dong Tian, Dalong Sun, Xing Zhou, Jiangtao Du, Han Xi'An Institute of Electromechanical Information Technology Xi'an710065 China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an710065 China Aviation Industry Development Research Center of China Beijing100029 China 210 Institute The Sixth Academy of China Aerospace Science & Industry Corp. Xi'an710065 China

The assembly accuracy of aircraft thin-walled components produced in the same batch is subject to fluctuations influenced by part tolerances and assembly processes. Significant variations in assembly precision can lead to increased assembly adjustment costs, severely affecting both efficiency and overall expenses. However, tolerance optimization that takes into account these fluctuations requires the integration of assembly deviation calculations, characterized by a high demand for large sample sizes and frequent iterative computations, which results in escalated computational costs. In this context, this paper establishes a data-driven mathematical model for tolerance optimization that comprehensively considers fluctuations in assembly accuracy, manufacturing costs, and quality losses, using a surrogate model as the core computational engine. Furthermore, to address the shortcomings of the traditional particle swarm optimization algorithm, namely, its tendency to get trapped in local optima and its insufficient local search capabilities, this study proposes an improved particle swarm optimization algorithm that integrates a chaotic local search strategy and second vibration particles. This enhanced algorithm is applied to the tolerance optimization problem of aircraft thin-walled components. © Published under licence by IOP Publishing Ltd.

关键词： Particle swarm optimization (PSO)

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Wide Solid Angle Scanning Conical Conformal Phased Array Antenna Based on Bidirectional Beam

Wide Solid Angle Scanning Conical Conformal Phased Array Ant...

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IEEE International Conference on Electronic Information and Communication technology (ICEICT)

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

ISBN: (数字)9798350384437

ISBN: (纸本)9798350384444

This paper presents a conical conformal antenna array with wide solid angle scanning range. The proposed antenna array employs two columns of conformal patch subarrays symmetrically distributed on the surface of a conical structure. With the symmetric structure, the antenna array can generate bidirectional beam to cover two symmetric azimuth sectors simultaneously. Given different phase distributions to the subarrays, the generated bidirectional beam exhibits different elevation angles, thus realizing scanning of the bidirectional beam with respect to the conical structure. Excited with four sets of phase difference, the proposed antenna array covers elevation range of -90° to -42° and 42° to 90° with 3dB beamwidth in azimuth plane of 138° to 170°. The conical conformal antenna array realizes wide solid angle scanning range with a simple structure, it is suitable for military detection and civil surveillance applications.

关键词： Phased arrays Military communication Azimuth Surveillance Solids Information and communication technology

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Analysis of the Response Characteristics of Ultra-Wideband Radio Fuze to Interference Signals 4

Analysis of the Response Characteristics of Ultra-Wideband R...

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4th International Conference on Defence technology, ICDT 2024

作者： Hao, Shijun Xie, Jialiang Liang, Yanbin Wu, Kaiwei Yang, Bing Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing China Air Force Armament Department Shenyang Regional Military Representative Bureau Jilin Regional Military Representative Office Jilin China

The response characteristics of the fuze to the interference signal with reasonable characteristic parameters are similar to the real echo signal, which may lead to the confusion of signal processing and recognition system. To solve this problem, this paper analyzes the influence of characteristic parameters of interference signal on the response characteristics of fuze in detail from two perspectives of time domain and frequency domain, Based on the analysis of receiver principle, the amplitude-frequency response model of sampling integral differential circuit is established, and the response characteristics of interference signal are analyzed from the perspective of frequency domain. Based on the analysis of the time-frequency characteristics of the echo signal of the UWB fuze, a time-frequency function cutting method is proposed to evaluate the anti-jamming performance of the UWB fuze. This methodology was applied to the evaluation of the anti-jamming performance of the UWB fuze to sinusoidal amplitude-modulation interference signal and the results show that the theoretical analysis and simulation results are consistent, and the research provides theoretical guidance for the anti-interference of fuze. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Jamming

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Object Detection Based on Digital Twin-Based Road Scenarios

Object Detection Based on Digital Twin-Based Road Scenarios

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

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

ISBN: (数字)9798350380958

ISBN: (纸本)9798350380965

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.

关键词： Training Roads Urban areas Object detection Digital twins Task analysis Artificial intelligence

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Effect of a typical smoke screen on pulsed laser fuze echoes 9

Effect of a typical smoke screen on pulsed laser fuze echoes

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9th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Shuai, Chen Mingkai, Yue Huimin, Chen School of Equipment Engineering Shenyang Ligong University Liaoning Shenyang110159 China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781510664432

In order to analyze the backscattering characteristics of pulsed laser fuze in typical smoke, copper powder and iron powder with a particle size range of 3~15 µm were selected, the detection model of pulsed laser fuzes in typical smoke was established based on Mie scattering theory and Monte Carlo method. The pulsed laser fuze is simulated to scatter echoes behind smoke curtains with different detection distances, different smoke screen thicknesses and different emitting laser pulse widths, and the echo intensities of copper powder smoke screens and iron powder smoke screens under the same smoke screen conditions are compared. The results show that the normalized echo intensity of copper powder smoke screen and iron powder smoke screen is negatively correlated with the detection distance. It is positively correlated with smoke screen thickness and emitted laser pulse width. In addition, under the same smoke screen environmental conditions, the echo intensity of the iron powder smoke screen is significantly stronger than that of the copper powder smoke screen, which can be explained that compared with the iron powder, copper powder is more suitable for use as a smoke generator material, the result can provide support for the anti-smoke interference of the laser fuze. © 2023 SPIE.

关键词： Particle size

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Current status and trends in the study of penetration fuze initiation control methods

Current status and trends in the study of penetration fuze i...

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2023 International Conference on Automation control, Algorithm, and Intelligent Bionics, ACAIB 2023

作者： Lu, Ying Sui, Li Wang, Dongya Shi, Gengchen Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China Northwest Industries Group Co. Ltd. Xi’an710043 China

ISBN: (纸本)9781510667662

With the development of the times, the concept of modern warfare is constantly changing and precision strikes have become an important mode and means of combat on the modern battlefield. It is of great strategic value to research and realise hard target penetration munitions that can strike accurately and effectively destroy high-value targets. The key to the efficient destruction of hard targets by penetration munitions is the penetration fuze, the core of which is the initiation control strategy in high overload conditions. By investigating the current state of research on intrusion fuze initiation strategies, the future trends of layer counting identification and cavity counting identification are envisaged. © 2023 SPIE.

关键词： Ammunition

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dynamic Accuracy Method of laser imaging system Based on MEMS mirror 3

Dynamic Accuracy Method of laser imaging system Based on MEM...

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3rd International Conference on Machine Learning and Computer Application, ICMLCA 2022

作者： Zhang, Jun Yang, Li Chen, Huimin School of Equipment Engineering Shenyang Ligong University Liaoning Shenyang110159 China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781510664814

As one of the important ways of laser imaging, Microelectromechanical system (MEMS)-based mirror imaging has the advantages of small volume and high frequency. In this paper, the relationship between key parameters of MEMS mirrors is studied. Also, the realization method of scanning imaging based on a one-dimensional MEMS mirror is studied. A method of controlling the number of scanning harnesses based on a MEMS mirror is proposed. The single-lens method is used to design and collimate the transmitting optical system with Zemax simulation software, and the effects of the different numbers of scanning wire harnesses are simulated. The result shows that the number of scanning wire harnesses can be controlled, indicating that the system's dynamic accuracy can be achieved. © 2023 SPIE.

关键词： MEMS

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Strength Calculation and Simulation Study of Threaded Connection of Penetration Fuze

Strength Calculation and Simulation Study of Threaded Connec...

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Artificial Intelligence, Networking and Information technology (AINIT), International Seminar on

作者： Pengzhao Xu Guangsong Ma Sen Wang Shaokang Cui Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China Xi'an Institute of Electromechanical Information Technology Xi'an China

ISBN: (数字)9798350385557

ISBN: (纸本)9798350385564

Aiming at the problem of whether the connection strength of the thread of the penetration fuze is sufficient the operating requirements under the impact load of penetrating multi-layer target plate. Using theoretical calculation and numerical simulation methods, under three different excitation conditions (axial, axial + radial (0.3 times axial), axial + radial (0.6 times axial)) under the impact load of the multi-layer target plate, the shear strength of the thread connecting the screw and the fuze shell and the extrusion strength of the thread tooth surface were studied. The results show that the design margins under the three excitation conditions are 0.9, 0.6 and 0.1, respectively, and all have certain design margins, indicating that the connection thread of the fuze meets the strength requirements when subjected to the impact load of the penetrating multilayer target plate.

关键词： Seminars Simulation Loading Fasteners Numerical simulation Nonhomogeneous media Synchronization

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