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检索条件"机构=Science and Technology on Complex System"

共 1613 条记录，以下是51-60 订阅

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Research on Requirement Analysis Method of Space Equipment technology system based on capability 7

Research on Requirement Analysis Method of Space Equipment T...

引用

7th IEEE Information technology and Mechatronics Engineering Conference, ITOEC 2023

作者： Jian, Ping Xiong, Wei Liu, Desehng Space Engineering University Science and Technology on Complex Electronic System Simulation Laboratory Beijing China

ISBN: (纸本)9798350334197

"Demand traction and technology promotion"is the main law of equipment system construction and development. Scientific determination and quantitative evaluation of key technologies in the field of military equipment is the key and difficult point of system macro demonstration. Based on the analysis of the technical structure of space information equipment technology, this paper proposes a capability-based requirement analysis framework and process of space information equipment technology system, establishes a requirement analysis model of technology system, and constructs its technical system by taking space situation awareness system as an example. It provides technical basis for the requirement analysis of space information equipment technology system. © 2023 IEEE.

关键词： Construction equipment

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Research Status and Application of Mission Assignment Method and Cooperative Positioning and Navigation for Cluster Aircraft

Research Status and Application of Mission Assignment Method...

引用

International Conference on Guidance, Navigation and Control, ICGNC 2022

作者： Danting, Sheng Mingrui, Hao Science and Technology On Complex System Control and Intelligent Agent Cooperation Laboratory Beijing100074 China

ISBN: (纸本)9789811966125

In order to solve the problem of multi-aircraft cluster cooperative combat, this paper tries to classify and sum up the existing achievements on task assignment method and cooperative positioning and navigation. Among the distributed methods of task allocation, the contract net-based method of task allocation and the distributed method of simulating the complex and orderly collective behavior of social creatures are briefly described. According to the method of cooperative positioning of swarm aircraft, it is divided into measuring the relative distance of aircraft, measuring the relative angle of aircraft and layered cooperative navigation system. Combining with the classical research and application, this paper analyzes and summarizes the existing task allocation methods and the achievements of cooperative positioning and navigation, and forecasts the future engineering application in this field. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Aircraft

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Hyperspectral Image Anomaly Detection Based on Auto Encoder 4

Hyperspectral Image Anomaly Detection Based on Auto Encoder

引用

4th International Conference on Geoscience and Remote Sensing Mapping, GRSM 2022

作者： Li, Guanzhe Wu, Lingda Hao, Hongxing Science and Technology on Complex Electronic System Simulation Laboratory Space engineering university Beijing China

ISBN: (数字)9781510662179

ISBN: (纸本)9781510662162

The reason for the existence of small targets and sub-pixel targets in hyperspectral images is that the low spatial resolution leads to the phenomenon of mixed pixels, which makes some targets exist in the form of small targets and sub-pixel targets in the image. Moreover, the traditional anomaly detection algorithm introduces the regularization parameter into hyperspectral anomaly detection, but the regularization parameter needs to be manually set and adjusted. However, since the anomaly detection is carried out without prior information, in real situations, it is difficult to obtain the prior information of the target, so the regularization parameter may be difficult to determine. In addition, considering that traditional algorithms are not sensitive to small target pixel targets, a hyperspectral anomaly detection network based on self encoder is designed for hyperspectral images with small targets and sub-pixel targets. © 2023 SPIE.

关键词： Anomaly detection

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Analysis and Modeling of Magnetorheological Hydro-pneumatic Spring Based on Bouc-Wen Model 2nd

Analysis and Modeling of Magnetorheological Hydro-pneumatic ...

引用

2nd International Conference of Mechanical system Dynamics, ICMSD 2023

作者： Qian, Ruijing Jiang, Min Zhang, Yanni Wang, Guoping National Key Laboratory of Complex Multibody System Dynamics Institute of Launch Dynamics Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9789819980475

In order to accurately describe the dynamic characteristics of magnetorheological hydro pneumatic spring, its working performance was tested, and a nonlinear model which can accurately describe its hysteresis characteristics was proposed based on Bouc-Wen model. Firstly, the mechanical properties of hydro pneumatic spring were tested, and its working characteristics were analyzed based on the test results. Secondly, the analysis of the output influence of each parameter in the Bouc Wen model is completed. The analysis results show that the nonlinear hysteretic system can be flexibly described by adjusting the parameters. Thirdly, based on Bouc-Wen model, a non-linear model of hydro pneumatic spring was proposed, and the target interval was narrowed by several iterations using genetic algorithm, thus the identification of model parameters was completed. Then, the relation function of each parameter in the model with current was obtained by ordinary least squares, and the non-linear model of hydro pneumatic spring was established. Finally, the numerical analysis of the magnetorheological hydro pneumatic spring nonlinear model was completed. The analysis results show that the calculation results of the hydro pneumatic nonlinear model agree well with the test results under the same input. The hydro pneumatic spring nonlinear model established can accurately describe its operating characteristics. This paper firstly applies Bouc-Wen model to the nonlinear modeling of new magnetorheological hydro-pneumatic springs, which provides a reference for the dynamic modeling of related magnetorheological hydro-pneumatic devices. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Genetic algorithms

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Dynamic Control of Magnetorheological Hydro-Pneumatic Suspension 2nd

Dynamic Control of Magnetorheological Hydro-Pneumatic Suspen...

引用

2nd International Conference of Mechanical system Dynamics, ICMSD 2023

作者： Jiang, Min Rui, Xiaoting Yang, Fufeng Institute of Launch Dynamics Nanjing University of Science and Technology Nanjing China National Key Laboratory of Complex Multibody System Dynamics Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9789819980475

A magnetorheological hydro-pneumatic (MRHP) suspension and an effective control method were proposed to enhance vehicle’s ride comfort. Firstly, a testing system for the properties of the MRHP spring was established and its mechanical properties were tested. Secondly, the nonlinear model of the MRHP spring was established. Thirdly, a 9-DOF vehicle dynamics model of the MRHP suspension was established. Finally, an effective semi-active controller for the MRHP suspension was proposed using the On–Off control method. The numerical analysis results showed that the control method for MRHP suspension can significantly improve the ride comfort and handling stability. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Numerical methods

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Design and Application of Multi-body Dynamics Optimization Design Software Architecture 2nd

Design and Application of Multi-body Dynamics Optimization D...

引用

2nd International Conference of Mechanical system Dynamics, ICMSD 2023

作者： Yang, Shuai Rong, Bao Lin, Shengtan Institute of Launch Dynamics National Key Laboratory of Complex Multibody System Dynamics Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9789819980475

With the development of computer science, the optimization method has been widely used in the dynamic design process of complex multi-body systems. In the optimization design of complex multi-body systems in different fields, there are many problems, such as large amount of calculation, low efficiency and difficult optimization of complex optimization problems. In this paper, a multi-body dynamic optimization design software (MSTMM-OPT) is designed and implemented, which combines the transfer matrix method and the approximate model to realize the optimal design of single-multi-objective problems. The software has the main functions of sensitivity analysis, experiment design, approximate model construction, optimization and solving, and realizes each function and corresponding post-processing result display function combined with interface design. The software can realize the optimization design of complex systems. By calculating a series of standard test functions, the software is compared with the similar multidisciplinary optimization software ISIGHT software, which shows that the main functions of the software are equivalent to those of similar foreign software. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Sensitivity analysis

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Modeling and Simulation of Gear Transmission system of Tank Gun Steering Machine 2nd

Modeling and Simulation of Gear Transmission System of Tank ...

引用

2nd International Conference of Mechanical system Dynamics, ICMSD 2023

作者： Tan, Ziyi Zhang, Jianshu National Key Laboratory for System Dynamics of Complex Equipment Institute of Launch Dynamics of Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9789819980475

All-electric artillery control servo systems generally use gear transmission mechanisms to transfer power. However, the presence of gear-side clearance in these mechanisms can seriously affect the system’s dynamic characteristics. The backlash caused by it can also result in the servo system’s delayed response, significantly reducing the system’s control precision. This article takes the tank gun control directional servo system as the research object and establishes a directional engine force model considering the gear-side clearance and clearance elimination mechanism. It simulates and analyzes the effect of the mechanical structure parameters of the gear transmission system on the system’s dynamic characteristics. The analysis results are meaningful for future research on directional engines. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Servomechanisms

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Design and simulation of a two-stage linear inverted pendulum control system based on fuzzy LQR control 7

Design and simulation of a two-stage linear inverted pendulu...

引用

7th International Symposium on Autonomous systems, ISAS 2024

作者： Peng, Siting Ren, Jun Li, Lei Ma, Yichao Song, Zhichao The Beijing Electro-Mechanical Engineering Institute Science and Technology On Complex System Control and Intelligent Agent Cooperation Laboratory Beijing China

ISBN: (纸本)9798350363173

This paper introduces in detail the origin of the development of automatic control methods, applications and current research hotspots. It also introduces some control methods commonly used in industrial and agricultural production, and expounds the current application hotspots and new advanced control methods that are developing rapidly. The background, current situation and classification of the inverted pendulum platform are introduced in detail. In the first chapter, the LQR method in modern control theory is introduced in detail. The influence of parameters is analyzed through simulink space modeling and simulation control experiment. At the same time, the real-time experiment is also done in combination with the hardware platform. In the second chapter, the fuzzy control theory in intelligent control is introduced in detail. By combining fuzzy control with LQR method, suitable LQR parameters are calculated by pole assignment. After proper adjustment, reasonable fuzzy rules are adopted and adaptive fuzzy control principle is applied to adjust the control situation in real time. Using simulink space modeling, a good simulation control effect is obtained. Finally, the summary is made. © 2024 IEEE.

关键词： Fuzzy control

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Research on Motor-Mechanism Coupling Dynamics Model and Control of Tank Gun Stabilization system 2nd

Research on Motor-Mechanism Coupling Dynamics Model and Cont...

引用

2nd International Conference of Mechanical system Dynamics, ICMSD 2023

作者： Zheng, Huaqing Rui, Xiaoting Zhang, Jianshu Institute of Launch Dynamics Nanjing University of Science and Technology Nanjing China National Key Laboratory of Complex Multibody System Dynamics Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9789819980475

Tank gun stabilization systems are the automatic control system that drives and stabilizes the tank gun. It has a significant effect in improving the tank combat capability and exerting its firepower. Firstly, mathematical model of a drive motor is built in this paper, followed by the overall simulation of permanent magnet synchronous motor (PMSM) control system. After that, the stable state characteristics as well as the dynamic characteristics of PMSM are analyzed. Next, combined with the established 2 DOF (two degree of freedom) dynamic model of tank gun stabilization system, a motor-mechanism coupled dynamics model of tank gun stabilization system is established. Subsequently, a coupled dynamics model is controlled by the computed torque control algorithm. Finally, it is shown in the simulation results that the tank gun stabilization system is well controlled. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Permanent magnets

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Definition of Standard Input Data in Launch Dynamics of Multibody systems 2nd

Definition of Standard Input Data in Launch Dynamics of Mult...

引用

2nd International Conference of Mechanical system Dynamics, ICMSD 2023

作者： Li, Geng Zhou, Qinbo Wang, Guoping Li, Tang National Key Laboratory of Complex Multibody System Dynamics Nanjing University of Science and Technology Nanjing China Institute of Launch Dynamics Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9789819980475

At present, each program for launch dynamics of multibody systems (LDMS) has its own data structure without a unified standard, which is not beneficial to the program development and maintenance. To improve the program's versatility, it is important to study the standardization of the data structure and input data for the LDMS code. Based on the launching subsystem proposed in (Zhou et al., Def Technol 17(6), 2011–2026 [4]), we design a general data structure and standard input data (SID) for the codes of the launching subsystem dynamics in this work. Based on object-oriented programming (OOP) technology, the unified modeling language (UML) is adopted to describe the geometry, kinematics, kinetics and subjected forces of the launching subsystem. The UML class diagram is used to describe the variable properties, such as definitions, types, and default units within each data structure. At the same time, the relationship among various classes is represented by straight or dashed line segments with a specialized convention. Further, the input data structure of the launching subsystem dynamics code is designed: the SID is defined for parameter initialization, which is stored in an extensible markup language (XML) document and read by the program. This work provides a theoretical basis and important guidance for the program design of LDMS. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： XML

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