检索结果-内蒙古大学图书馆

2024 International Conference on Image, Signal Processing, and Pattern Recognition, ISPP 2024

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

ISBN: (纸本)9781510680425

Addressing the current challenges of weak target azimuth detection and inadequate precision in frequency modulated continuous wave (FMCW) radar systems, this paper proposes a novel method for precise imaging based on a motion array using FMCW radar for accurate range and azimuth estimation. The approach involves the use of a millimeter-wave FMCW radar with a motion array to capture target angular information, leading to a substantial improvement in azimuth estimation resolution, particularly for munitions. Additionally, spatial Fourier transform array signal processing is employed to achieve two-dimensional precise imaging of radar targets, encompassing both range and azimuth dimensions. Experimental results validate the effectiveness of the proposed approach, showcasing an enhanced angular resolution of the millimeter-wave radar, reaching 2.6°. The method demonstrates favorable azimuth estimation outcomes in diverse scenarios, including those involving multiple and planar targets. Overall, the introduced technique significantly elevates the precise detection capability of automotive millimeter-wave radar systems. © 2024 SPIE.

关键词： Radar imaging

来源：评论

学校读者我要写书评

暂无评论

Research on Identification of Fire Signal of a Certain Type of Rocket 4

Research on Identification of Fire Signal of a Certain Type ...

引用

4th International Conference on Defence technology, ICDT 2024

作者： Guo, Pengda Wang, Yabin Luan, Donglin Yang, Shanglin School of Mechatronical Engineering Beijing Institute of Technology Beijing China Science and Technology on Electromechanical Dynamic Control Laboratory China

To assess the contradiction between ballistic safety and ignition reliability in traditional rocket projectile inertial initiation mechanisms, this study focuses on the recognition of graze bursting ignition signals for a specific type of rocket projectile. By utilizing a finite element numerical simulation method to model the small-angle impact of the rocket projectile on a target, the overload information can be extracted from the ignition mechanism. The accuracy of the simulation model can be validated by comparing it with data obtained from live ammunition tests. Through a series of simulations, the ignition threshold can be determined by the maximum velocity change vector within different time windows of the ignition mechanism. And the integration algorithm is used to accumulate the overload value of the ignition mechanism in the time window to judge whether the velocity change threshold is reached, and then judge whether to output the ignition signal. The algorithm verification shows that the algorithm can effectively identify the ignition signal under the set ignition threshold. This method provides a basis for recognizing the graze bursting ignition signal. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Projectiles

来源：评论

学校读者我要写书评

暂无评论

An Interference Mitigation Technique for Automotive Radar Based on Empirical Wavelet Transform and Maximum Correlation Coefficient 3

An Interference Mitigation Technique for Automotive Radar Ba...

引用

3rd International Conference on control Theory and Applications, ICoCTA 2023

作者： Zhou, Wen Hao, Xinhong Yang, Jin Yang, Qiuyan Science and Technique on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing China

ISBN: (纸本)9781839539824

With the development of autonomous driving technology, the probability of mutual interference between automotive radars has significantly increased. Aiming at the increasingly serious mutual interference problem among automotive radars, an interference mitigation technique based on empirical wavelet transform and maximum correlation coefficients is proposed. The technique achieves the reconstruction of clean target signals from interfered original signals by constructing an adaptive wavelet band-pass filter bank, and then locates the target echo signal by the maximum similarity coefficient to achieve the reconstruction of the target echo signal. The effectiveness of this technique has been verified through simulation experiments, and the experimental results show that the proposed technique can significantly reduce the impact of interference. Compared with several existing technologies, it further demonstrates the superiority of the proposed technique. © The Institution of Engineering & technology 2023.

关键词： Automotive radar

来源：评论

学校读者我要写书评

暂无评论

DBDB: de-bimodal defocus blur in joint infrared-visible imaging

引用

Visual Intelligence 2025年第1期3卷 1-12页

作者： Cao, Zhe Xu, Lixin Zhang, Jin Yang, Biwen Chen, Kaizheng Zhang, Ruiheng State Key Laboratory of Electromechanical Dynamic Control the School of Mechatronical Engineering Beijing Institute of Technology Beijing 100081 China

Despite the recent accomplishments in joint infrared-visible imaging, the bimodal defocus blur (BDB) phenomenon received scant attention. Our analysis reveals that BDB is predominantly attributable to disparities in optical parameters between cameras, resulting in two primary challenges: incomplete single-modal information and difficulty in cross-modal information interaction. With regard to the former, the infrared modality is the primary victim, as the deblurring networks’ bias toward high-frequency results in erroneous low-frequency reconstruction (e.g., over-sharpening). In the latter case, the relative nature of the blur effect can lead to ambiguity in determining which modality’s information should be prioritized for guidance, and conflicts may arise between the clear components of the blurred image and the blurry components of the clear image. To address these issues, we propose the first de-bimodal defocus blur (DBDB) method, which consists of a low-frequency semantic hold (LSH) module with a pre-trained infrared model and a cross-modal complementary feature induction (CCFI) module driven by a max-min blur entropy loss. LSH is designed to ensure that the low-frequency information captured by the infrared modality does not contain any misleading data, while CCFI facilitates the acquisition of accurate information by means of adaptive adjustment and the loss function. The experimental results of deblurring and downstream tasks on two synthetic datasets demonstrate the superiority of our method. © The Author(s) 2025.

关键词： Defocus blur Image reconstruction Multimodal learning Pre-training model RGBT

来源：评论

学校读者我要写书评

暂无评论

Study on the Characteristics of High Voltage Capacitance in Fuze Electronic Safety System 16th

Study on the Characteristics of High Voltage Capacitance in ...

引用

16th International Conference on Modelling, Identification and control, ICMIC 2024

作者： Yang, Liuzhu Mao, Ruizhi Zhou, Xiaodong Cheng, Xinya Chen, Yao Zhang, Lisha School of Mechatronical Engineering Beijing Institute of Technology Beijing100081 China Science and Technology on Electromechanical Dynamic Control Laboratory Beijing100081 China

ISBN: (纸本)9789819617760

High voltage capacitor discharges serve as the primary source of pulse current in fuze electronic safety systems. This study explores the impact of high voltage capacitors on charging time, discharge time, and pulse discharge capacity in such systems, focusing on characteristics like leakage current and dielectric material. Through simulations of charging and discharging circuits, it was observed that the capacitor's voltage increases when the charging current surpasses the leakage current, eventually reaching a steady-state value when equilibrium is achieved. Analysis of polarization-electric field (PE) curves for various capacitor materials revealed that antiferroelectric material is the most optimal choice for high-voltage capacitors in fuze electronic safety systems, followed by linear material capacitors and ferroelectric material capacitors. Notably, the discharge power of antiferroelectric material capacitors was found to be approximately three times greater than the other two types, making them more conducive to fuze miniaturization. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Capacitor bank

来源：评论

学校读者我要写书评

暂无评论

Evaluation Method for Anti-Chaff Jamming Performance of Typical Radio Fuze 4

Evaluation Method for Anti-Chaff Jamming Performance of Typi...

引用

4th International Conference on Defence technology, ICDT 2024

作者： Xiangli, Wenting Su, Hong Li, Tie Hou, Yali Cui, Dong Science and Technologo on Electromechanical Dynamic Control Laboratory Xi’an China Xi’an Institute of Electromechanical Information Technologhy Xi’an China

Chaff jamming is one of the common countermeasures in electronic warfare against radio fuze. Currently, there is no unified and effective evaluation criterion and method for the anti-chaff jamming capability of radio fuze. An evaluation method for the anti-chaff jamming performance of radio fuze during the missile-target encounter trajectory phase is proposed. A dynamic echo model of chaff clouds was established. The echo signals of the chaff cloud and the target were calculated and the fuze actuation were simulated and analyzed. The results show that this evaluation method can effectively assess the anti-chaff jamming performance of typical radio fuze. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Jamming

来源：评论

学校读者我要写书评

暂无评论

Monte Carlo Analysis and Optimization of Inertial Switch Tolerance of a Proximity Fuze 4

Monte Carlo Analysis and Optimization of Inertial Switch Tol...

引用

4th International Conference on Defence technology, ICDT 2024

作者： Zhao, Xin Sa, Haijing Qiu, Liliang Zhang, Wenyi Song, Rongchang CSSC Systems Engineering Research Institute Beijing China Science and Technology on Electromechanical Dynamic Control Laboratory beijing China

Aiming at the low operation rate of the firing mechanism of ammunition fuze, robustness analysis and probabilistic design methods were introduced into the fuze design to carry out system simulation research on performance prediction and optimization of the firing mechanism of ammunition fuze. In this paper, the dynamic model of the inertial impact switch of a proximity fuze is established, and the mechanism can be reliably triggered under nominal values by simulation method. Based on the Monte Carlo simulation of dimensional tolerance distribution, the trigger performance is evaluated. The contribution rate of each dimension variable to the target value is obtained by using the optimal Latin hypercube experiment design, and the variable tolerance with greater contribution rate is optimized by Pointer algorithm. After optimization, the range of variable Jdxh_f was optimized from 0.1274 to 0.1666 to 0.1274 to 0.1556. Finally, the optimized results were validated, with a uniform distribution yielding 0.003193517N, a bimodal distribution yielding 0.2230769N, and a normal distribution yielding *** validation analysis of these results shows that the target value distribution data after optimization meets the design *** study seeks a balance between performance reliability and manufacturing cost, which is of great significance to improve product performance and reduce manufacturing cost. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Normal distribution

来源：评论

学校读者我要写书评

暂无评论

引用

4th International Conference on Computer science, Electronic Information Engineering and Intelligent control technology, CEI 2024

作者： Zhou, Xulang Wen, Yongdiao Hu, Wenhui Li, Gang Li, Tie Xidian University School of Electric Engineering Xi'an China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an China

ISBN: (纸本)9798350378542

To address the challenge of effectively evaluating ISAR image similarity under multi-precision fusion processing, this paper proposes a Fine-Grained Weighted Entropy (FGWE)-based image similarity evaluation method. This approach fully considers the subtle structural features in radar images by assigning different entropy weights to various regions, thereby emphasizing the differences of the important structural information and then reflecting accurately the similarity between images. Experimental results demonstrate that, compared with traditional methods, when FGWE was used to evaluate radar images, it showed a greater sensitivity to structural feature differences, and more accurately trapped the image information loss which derived from multi-precision processing. The mentioned FGWE reveals great potential in the field of radar image precision evaluation. © 2024 IEEE.

关键词： Radar imaging

来源：评论

学校读者我要写书评

暂无评论

Research on Miniature Three-Axis Switch Used in Fuze 4

Research on Miniature Three-Axis Switch Used in Fuze

引用

4th International Conference on Defence technology, ICDT 2024

作者： Liang, Hanwen Jia, Senqing Guo, Hua Wang, Lifang Song, Rongchang Zhou, Xingzong Science and Technology on Electromechanical Dynamic Control Laboratory Beijing Institute of Technology Beijing China Electromechanical Dynamic Control Laboratory Xi'an China Huaihai Industry Group Co. Ltd. Changzhi China Beijing Power Machinery Research Institute Beijing China

This paper proposes a miniature three-axis switch based on precision mechanical processing technology. A dynamic analysis of the three-axis switch is conducted, and the standard S-type micro-spring is optimized for design requirements. A contact enhancement design with flexible contacts on the mass block is proposed, and the structural design of a layered three-axis sensitive three-axis switch is completed. Finite element simulation methods are used to analyze the stiffness modal properties, multi-directional closure thresholds, and contact performance of the three-axis switch. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Precision engineering

来源：评论

学校读者我要写书评

暂无评论

A X/Ka-Band Low-Profile Double-Conical-Beams Antenna with Vortex Electromagnetic Waves

A X/Ka-Band Low-Profile Double-Conical-Beams Antenna with Vo...

引用

2023 IEEE MTT-S International Wireless Symposium, IWS 2023

作者： Qin, Dongjie Li, Weishan Ma, Jie Zang, Yiping Zhao, Xu Xi'an Institute of Electromechanical Information Technology Xi'an710065 China Science and Technology on Electromechanical Dynamic Control Laboratory Xi'an710065 China

ISBN: (纸本)9798350336535

Antennas with conical beams have the advantage in anti-interference applications. This paper proposes a low-profile antenna with two conical beams working at X and Ka bands. To save space, a Ka-band multi-ring antenna composed of one circular plate and five concentric rings is placed on the center of an X-band uniform circular array (UCA) antenna formed by eight microstrip patches. A vortex electromagnetic wave (VEW) with mode 1 is generated with the UCA antenna with phase difference of the elements of 45 deg. With different phase difference, the higher modes of the VEW can be formed. The cylindrical cavity not only serves as the cavity of the Ka-band antenna, but also physically separates the two antennas which makes them do not interference with each other. The peak gain at 37.5GHz of Ka band is 12.4dBi, and the 3dB beamwidth is in the range of 6.9-24.4deg. The peak gain at 10GHz of X band is 8.2dBi, and the 3dB beamwidth is in the range of 12.8-43deg. © 2023 IEEE.

关键词： Vortex flow

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：