检索结果-内蒙古大学图书馆

Neural Networks, Information and Communication engineering (NNICE), International Conference on

作者： Zhe Li Juan Zhao Shanshan Lu General system designing department No.3 Xi'an Electronic Engineering Research Institute Xi'an China Sixth Sector Xi'an Modern Control Technology Research Institute Xi'an China Basic research department No.4 Xi'an Electronic Engineering Research Institute Xi'an China

Clutter Suppression Interference (CSI) is a common radar signal processing method, which efficiently suppresses ground clutter interference in radar received echoes and can greatly improve the signal-to-noise ratio of airborne synthetic aperture radar ground motion target indication (SAR/GMTI). However, the implementation of the clutter suppression algorithm in engineering is difficult because of the large number of filtering power coefficients to be calculated in real time. Based on this research background, this paper models the ground clutter of airborne radar, analyzes the principles and performance of three clutter suppression algorithms, CSI, ACSI and median cancellation ACSI, and performs engineering implementation. From the engineering experimental results, it can be seen that all three algorithms can improve the airborne radar signal-to-noise ratio and thus improve the recognition capability of moving targets, among which the median pair cancellation ACSI algorithm has the lowest false alarm probability and the greatest performance improvement.

关键词： Target recognition Radar clutter Airborne radar Signal processing algorithms Radar signal processing Real-time systems Clutter

来源：评论

学校读者我要写书评

暂无评论

K-BMPC: Derivative-based Koopman Bilinear Model Predictive control for Tractor-Trailer Trajectory Tracking with Unknown Parameters

arXiv

引用

arXiv 2023年

作者： Wang, Zehao Zhang, Han Wang, Jingchuan Department of Automation Institute of Medical Robotics Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Engineering Research Center of Intelligent Control and Management Shanghai200240 China

Nonlinear dynamics bring difficulties to controller design for control-affine systems such as tractor-trailer vehicles, especially when the parameters in the dynamics are unknown. To address this constraint, we propose a derivative-based lifting function construction method, show that the corresponding infinite dimensional Koopman bilinear model over the lifting function is equivalent to the original control-affine system. Further, we analyze the propagation and bounds of state prediction errors caused by the truncation in derivative order. The identified finite dimensional Koopman bilinear model would serve as predictive model in the next step. Koopman Bilinear Model Predictive control (K-BMPC) is proposed to solve the trajectory tracking problem. We linearize the bilinear model around the estimation of the lifted state and control input. Then the bilinear Model Predictive control problem is approximated by a quadratic programming problem. Further, the estimation is updated at each iteration until the convergence is reached. Moreover, we implement our algorithm on a tractor-trailer system, taking into account the longitudinal and side slip effects. The open-loop simulation shows the proposed Koopman bilinear model captures the dynamics with unknown parameters and has good prediction performance. Closed-loop tracking results show the proposed K-BMPC exhibits elevated tracking precision with the commendable computational efficiency. The experimental results demonstrate the feasibility of K-BMPC. © 2023, CC BY-NC-SA.

关键词： Model predictive control

来源：评论

学校读者我要写书评

暂无评论

Dynamic Performance Optimization research of Impeller-Baffle Compound Structure under Water 12

Dynamic Performance Optimization Research of Impeller-Baffle...

引用

12th IEEE International Conference on Mechanical and Intelligent Manufacturing Technologies, ICMIMT 2021

作者： Bai, Xianghua Chen, Chunlin Lv, Jiangang Gao, Fei Zhao, Qijin Army Academy of Armored Forces Weapons and Control Department Beijing China Army Engineering University Department of Vehicle Shijiazhuang Campus Shijiazhuang China Research Institute of System Engineering China

ISBN: (纸本)9780738144627

In order to improve the dynamic performance of the bionic impeller under water, this paper designs a kind of bionic impeller-baffle compound structure, builds the mechanics model of the bionic impeller-baffle mechanism underwater, analyzes its mechanics performance based on the finite volume method, and researches the influence rule of the bionic impeller mechanics performance and its fluid field under 20 kinds of baffle device in different physical parameters. The research results indicated that the bionic impeller-baffle compound structure can have a better dynamic performance under water through changing the shape design of the baffle. © 2021 IEEE.

关键词： Bionics

来源：评论

学校读者我要写书评

暂无评论

A research on Rapid Assessment of Cross-Domain Perceptual Fidelity for Practical Applications

A Research on Rapid Assessment of Cross-Domain Perceptual Fi...

引用

Fully Actuated system Theory and Applications (CFASTA), Conference on

作者： Wenguang Tao Xiaotian Wang Tian Yan Guodong Li Qingjie Zeng Ruitao Lu Unmanned System Research Institute Northwestern Polytechnical University Xi’an China Xi’an Modern Control Technology Research Institute Xi’an China Xi’an Guidance Technology Co. Ltd. Xi’an China Department of Missile Engineering Rocket Force University of Engineering Xi’an China

ISBN: (数字)9798350373691

ISBN: (纸本)9798350373707

With the rapid development of information technology, digital simulation technology plays a key role in improving training effects, providing accurate decision support, and promoting innovation and research and development. How to provide a more realistic training experience in simulation is particularly important. Guided by practical applications and based on cross-domain perception representation, this paper proposes a cross-domain perception fidelity evaluation algorithm oriented to application requirements. This method uses traditional methods to extract statistical features from the data and calculate feature similarity. Then, machine learning methods are used to extract structural, content and semantic features, effectively complete appearance and texture and calculate similarity. Finally, in order to ensure the effect in the actual application domain, the fidelity evaluation algorithm is designed based on the domain adaptation algorithm. Experimental results show that this method can well complete the cross-domain perceptual fidelity evaluation of simulation domain data and source domain data.

关键词： Training Technological innovation Machine learning algorithms Semantics Machine learning Reliability theory Feature extraction

来源：评论

学校读者我要写书评

暂无评论

Glare suppression focusing method for high polarization purity focus generation

引用

Optics Letters 2025年第12期50卷 4086-4089页

作者： Kaige Liu Hengkang Zhang Tianhao Zhang Bin Zhang Xing Fu Qiang Yuan Qiang Liu Key Laboratory of Photonics Control Technology (Tsinghua University) Ministry of Education Beijing 100084 China Tsinghua University State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instrument Beijing 100084 China Research Center of Laser Fusion China Academy of Engineering Physics Mianyang 621900 China Beijing Institute of Control Engineering Beijing 100190 China Beijing Institute of Electronic System Engineering Beijing 100854 China fuxing@*** yuanqiang2003@***

When a light beam propagates through strongly scattering media, not only does its amplitude and phase distribution become scrambled, but its polarization state also becomes randomized. This depolarization effect imposes significant limitations on the applications of vector light fields in scattering environments. In this Letter, we propose a glare suppression-based method for achieving highly polarization-pure scattering light focusing. For the target polarization direction, we employ the transmission matrix method to calculate the optimized focusing mask. While in its orthogonal-polarization direction, we utilize singular value decomposition (SVD) of the transmission matrix to identify low-eigenvalue transmission channels and reconstruct the focusing mask. Experimentally, we demonstrate over 40-fold enhancement in focal polarization ratio compared to a conventional method. We believe our method provides an effective solution for controlling full-polarization output using single-polarization input, which will be of interest in the fields of wavefront shaping and structured light.

关键词： Light beams Matrix methods Optical fields Phase conjugation Scattering media Spatial light modulators

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on the Operational Characteristics and Coupling Relationships of Burners, Heat Exchangers, and Reformers in a Kerosene Solid Oxide Fuel Cell

SSRN

引用

SSRN 2024年

作者： Liu, Yechang Ning, Zhi Wang, Lintao Zheng, Xuan Sun, Chunhua Wei, Yongqi Lv, Ming School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing100044 China Shanghai Marine Diesel Engine Research Institute Shanghai201108 China Electric Drive System Department of BAIC Research Institute Co. Ltd Beijing China

The burner, heat exchanger, and reformer are pivotal components of the solid oxide fuel cell (SOFC) power generation system, and their operational characteristics have a direct impact on the system's ability to achieve efficient and stable power output. This study has established an experimental platform for a kerosene SOFC system to investigate the operational characteristics and coupling relationships of the burner, heat exchanger, and reformer. The research findings indicate that the burner operates stably with an excess air ratio of 39.4, but experiences frequent extinguishing when the methane flow rate falls below 4 SLM. Reducing both methane and water flow rates leads to a more significant temperature decrease in the burner and combined heat exchanger compared to reducing methane flow alone. Increasing the kerosene flow rate by 15% causes a 2.5% change in the outlet temperature of the burner, a 2.15% change in the air heat exchanger's exhaust gas input temperature, and a 1.47% change in the flue gas inlet and outlet pressure drop. However, due to the presence of the heater, there is no significant variation in the input and exit temperatures of the reformer. By elevating the reformer temperature and steam-to-carbon ratio, it is possible to bring the hydrogen volume fraction after kerosene reforming closer to that after methane reforming, and even lower than that after methane reforming. The electric heater serves as a means of thermal compensation, mitigating the intricate coupling effects among the reformer, burner, and heat exchanger. © 2024, The Authors. All rights reserved.

关键词： Methane

来源：评论

学校读者我要写书评

暂无评论

Optimal control-based Motion Cueing Algorithm Design for 6DOF Motion Platform 4

Optimal Control-based Motion Cueing Algorithm Design for 6DO...

引用

4th IEEE International Conference on Knowledge Innovation and Invention, ICKII 2021

作者： Wei, Ming-Yen Chen, Shiaw-Wu National Chung-Shan Institute of Science and Technology Aeronautical System Research Division Simulation System Section Taichung Taiwan Feng-Chia University Department of Aautomatic Control Engineering Taichung Taiwan

ISBN: (纸本)9781665423076

Motion-cueing algorithm is the movement simulation system that calculates the platform's attitude to produce the feeling of real vehicle movement to the user considering the platform's mechanical restrictions in its calculation and algorithm. This paper presents the design of the kinematics model and motion-cueing algorithm for a 6-DOF motion platform. Firstly, the relationship between each axis coordinate is derived from the motion platform coordinate transformation and kinematics theory. Next, the optimized tracking motion-cueing algorithm is designed to improve the dynamic responses of the 6-DOF control system. Finally, a digital signal processor (DSP), TMS-320F-28377, is used as a control center to carry out the kinematic model and motion-cueing algorithms which combines MATLAB software to analyze the execution results of DSP. Simulation results validate the theoretical analysis to illustrate the practicability and correctness of the proposed method. © 2021 IEEE.

关键词： Kinematics

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on the Operational Characteristics and Coupling Relationships of Burners, Heat Exchangers, and Reformers in a Kerosene Solid Oxide Fuel Cell

SSRN

引用

SSRN 2024年

关键词： Methane

来源：评论

学校读者我要写书评

暂无评论

research on Optimization of Two-Stage Scheduling for Aluminum Extrusion Machine Manufacturing Line

Research on Optimization of Two-Stage Scheduling for Aluminu...

引用

Chinese Automation Congress (CAC)

作者： Aoran Zhou Lipeng Qiu Yali Wu Department of Information and Control Engineering Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing Xi'an University of Technology Xi'an China State Key Laboratory of Metal Extrusion and Forging Equipment Technology China National Heavy Machinery Research Institute Co Ltd Xi'an China

ISBN: (数字)9798350368604

ISBN: (纸本)9798350368611

In view of the problems of high energy consumption, long inventory time and low production efficiency in the production process of traditional aluminum extrusion machine, this paper establishes an efficient two-stage parallel scheduling optimization model based on the integration of flexible job shop scheduling and assembly sequence planning (IFJSS-ASP). On this basis, an evolutionary algorithm combining strong dominance relationship and simple grouping method (SDREA-SGM) is proposed. The algorithm utilizes a two-stage hybrid chromosome encoding and decoding method to establish a rational mapping from the decision space to the solution space. Furthermore, in order to prevent the model from easily falling into local optima, an adaptive intra-class and inter-class pairing selection strategy has been adopted by the algorithm. This enhances global search and improves local search flexibility. Finally, the feasibility and effectiveness of the algorithm are verified by solving problems of different scales.

关键词： Energy consumption Job shop scheduling Optimization models Aluminum Production Evolutionary computation Encoding Planning Decoding Optimization

来源：评论

学校读者我要写书评

暂无评论

Stability Analysis and Performance Evaluation of Delayed Bilateral Telerobotic systems over a Lossy Communication Channel

引用

Journal of systems Science & Complexity 2021年第1期34卷 157-179页

作者： BAKHSHI Ali ALFI Alireza TALEBI Heidar Ali SOURATGAR Amir Aboulfazl YOUSEFI Mahdi Faculty of Electrical and Robotic Engineering Shahrood University of TechnologyShahrood 36199-95161Iran Power Plants Control Systems Technology Development Plan Department of monitoring and ControlNiroo Research InstituteTehran 14665-517Iran Real-Time and Robotics system Laboratory Faculty of Electrical EngineeringAmirkabir University of TechnologyHafez AvenueTehran 15914Iran Electrical and Computer Engineering Department The University of British Columbia2385East MallVan couverBC V6T 1Z4Canada

The focus of this paper is to address a novel control technique for stability and transparency analysis of bilateral telerobotic systems in the presence of data loss and time delay in the communication channel. Different control strategies have been reported to compensate the effects of time delay in the communication channel;however, most of them result in poor performance under data loss. First, a model for data loss is proposed using a finite series representation of a set of periodic continuous *** improve the performance and data reconstruction, a holder circuits is also introduced. The passivity of the overall system is provided via the wave variable technique based on the proposed model for the data loss. The stability analysis of the system is then derived using the Lyapunov theorem under the time delay and the data loss. Finally, experimental results are given to illustrate the capability of the proposed control technique.

关键词： Lossy channel passivity stability telerobotic transparency

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：