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检索条件"机构=Key Laboratory of Science and Technology on Aircraft Control for National Defence"

共 160 条记录，以下是21-30 订阅

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Dynamic stiffness simulation analysis of hydraulic dual-parallel actuation systems using Amesim

Dynamic stiffness simulation analysis of hydraulic dual-para...

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2024 CSAA/IET International Conference on aircraft Utility Systems, AUS 2024

作者： Li, Chuandong Wu, Shuai Wei, Renlei Chen, Taiqi Qin, Mingyuan Chu, Bing Yang, Yuliang Luo, Jianing School of Automation Science and Electrical Engineering Beihang University Beijing100191 China National Key Laboratory of Aircraft Integrated Flight Control Beihang University Beijing100191 China AVIC Shenyang Aircraft Design and Research Institute Ministry of Industry and Information Technology Beijing100191 China Key Laboratory of Advanced Aircraft Systems Beihang University Ministry of Industry and Information Technology Beijing100191 China

In the field of flight control systems, actuators play a crucial role, and dynamic stiffness stands as one of the pivotal metrics to gauge their performance, reflecting the actuators' resilience to external disturbances. Hence, investigating dynamic stiffness is paramount for enhancing the overall performance of flight control systems. This study focuses on a hydraulic dual-parallel actuator system, wherein a mathematical model is established to derive the expression for dynamic stiffness. Leveraging the Amesim software, a simulation model of the parallel actuator system is constructed to conduct an in-depth analysis of its dynamic stiffness characteristics. During simulation, sinusoidal loading forces of varying frequencies are applied at the output end of the actuator system, and displacement response data is collected. Subsequently, the Fast Fourier Transform (FFT) is employed to obtain dynamic stiffness, enabling an analysis of its variations. The relationship between the system's natural frequency and dynamic stiffness is explored, along with an investigation into the primary factors influencing dynamic stiffness. Simulation results indicate that enhancing both support and connection stiffness,reducing load mass and enlarging the piston area can enhance the system's dynamic stiffness, thereby meeting the performance requirements of flight control systems. © The Institution of Engineering & technology 2024.

关键词： Fast Fourier transforms

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OPTIMAL DESIGN OF THERMAL MANAGEMENT SYSTEM FOR AIRBORNE DIRECTED ENERGY WEAPONS

OPTIMAL DESIGN OF THERMAL MANAGEMENT SYSTEM FOR AIRBORNE DIR...

引用

2024 CSAA/IET International Conference on aircraft Utility Systems, AUS 2024

作者： Liu, Yide Li, Yang Cheng, Chaoqian Zhao, Longfei School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China National Key Laboratory of Aircraft Integrated Flight Control Beijing100191 China Key Laboratory of Advanced Aircraft Utility Systems Beihang University Ministry of Industry and Information Technology China Tianmushan Laboratory Hangzhou311115 China

Next-generation aircraft will carry directed energy weapons to ensure air superiority and significantly enhance both defensive and offensive capabilities. However, these weapons face severe thermal management challenges. This paper contributes by finely analyzing the heating mechanisms of core components within directed energy weapons and proposes a thermal management solution based on pump-driven two-phase flow. The thermal flow of the chip array layout is modeled and analyzed. The cold plate structure is optimized for the best-balanced thermal resistance and pressure drop. © The Institution of Engineering & technology 2024.

关键词： Directed-energy weapons

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Power-Hardware-in-the-Loop Motor Emulator under Four-Quadrant Operation Condition 10

Power-Hardware-in-the-Loop Motor Emulator under Four-Quadran...

引用

10th IEEE International Power Electronics and Motion control Conference, IPEMC 2024 ECCE Asia

作者： Zhang, Gengchen Guo, Hong Xu, Jinquan Wang, Gaoxiang Zhang, Li Jin, Wenbo Zhao, Xiaopeng Liu, Ying Beihang University School of Automation Science and Electrical Engineering Bejing China Southwest China Research Institute of Electronic Equipment Chengdu China Xian Flight Automatic Control Research Institute Xi'an China National Key Laboratory of Science and Technology on Aircraft Control Xi'an China

ISBN: (纸本)9798350351330

In order to solve the problems of long cycle and the difficulty of test, this paper proposes a method of power-in-the-loop motor simulator. Firstly, the topology of the motor simulator is proposed, composed of an interface filtering unit, a motor simulation unit and an energy management unit. Secondly, a discretization method for permanent magnet synchronous motor(PMSM) is designed for DSP control. Thirdly, this paper proposes a method combining quasi-proportional resonance control(QPR) and direct current control to ensure the control accuracy. Finally, the motor simulator is verified by experiments. © 2024 IEEE.

关键词： Permanent magnets

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Privacy - Preserving Event - Triggered Predefined Time Containment control for Networked Agent Systems 14

Privacy - Preserving Event - Triggered Predefined Time Conta...

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14th International Conference on Information science and technology, ICIST 2024

作者： Li, Weihao Yue, Jiangfeng Shi, Mengji Lin, Boxian Qin, Kaiyu School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu611731 China National Laboratory on Adaptive Optics Chengdu610209 China

ISBN: (纸本)9798350353334

This paper addresses the privacy-preserving event-triggered predefined time containment control problem for net-worked agent systems. A novel containment control scheme is developed that integrates privacy protection with event-triggered mechanisms, optimizing network efficiency b y minimizing un-necessary data transmission while ensuring robust containment within a specified time frame. T he proposed control scheme ensures the confidentiality of agents' information through output masking, thereby maintaining both privacy and control accuracy. Furthermore, it provides a distinct advantage over traditional finite-time and fi xed-time co ntrol me thods by gu aranteeing con-vergence to the desired state within a predefined time, regardless of initial conditions. Finally, some simulation results are given to verify the effectiveness of the proposed containment control scheme. © 2024 IEEE.

关键词： Differential privacy

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Trajectory Optimization and control Algorithm of Perch Landing for Fixed-Wing aircraft

Trajectory Optimization and Control Algorithm of Perch Landi...

引用

International Conference on Guidance, Navigation and control, ICGNC 2022

作者： Wang, Guanjie Song, Kepu Zhang, Xianglun AVIC Xi’an Flight Automatic Control Research Institute Xi’an710076 China National Key Laboratory of Science and Technology on Aircraft Control Xi’an710076 China AVIC Xi’an Aircraft Industry Group Company Ltd. Xi’an710089 China

ISBN: (纸本)9789811966125

Recent years, many researches have begun to study bird-like perch landing method. The advantage of perch landing for fixed-wing aircraft is that the landing time and space can be saved. However, the control problem of perch landing for fixed-wing aircraft at the high angle of attack is challenging because of the rapid change of the angle of attack and the unsteady airflow field. This paper considers the control problem of nonlinear motion equations with high angle of attack caused by perch landing, plans perch landing trajectory on the nonlinear motion model by the optimal control theory, and designs longitudinal control law based on system identification and lateral control law based on dynamic inverse. The simulation results show that compared with regular landing, the landing time and space can be significantly shortened by perch landing. Besides, the perturbation test results reveal good accuracy and stability of control algorithm. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Equations of motion

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Gradient-index curved acoustic lenses for high-precision imaging 4

Gradient-index curved acoustic lenses for high-precision ima...

引用

4th International Computational Imaging Conference, CITA 2024

作者： Zhang, Lei Li, Wei Liu, Zeru Zhang, Min Lian, Meng Cao, Tun School of Optoelectronic Engineering and Instrument Science Dalian University of Technology Dalian116024 China National Key Laboratory of Electromagnetic Information Control and Effects Shenyang110036 China Shenyang Aircraft Design and Research Institute Shenyang110036 China

ISBN: (纸本)9781510688834

Acoustic lens is widely used in ultrasound imaging to manipulate the focusing of sound beams. In this paper, a three-dimensional gradient-index multifunctional lens based on circuit control is proposed. Different from the previous acoustic lens based on phonon crystal or crimp-space design, the lens is easy to manufacture and only depends on the refractive index tunable material to fill the lens structure. Based on multiple variable refractive index of this article Einstein ring RineHart curved shell structure, building material and refractive index of the mapping relation of shell structure, electrically induced regulation method of refractive index is put forward, make the surface acoustic wave propagation in a three-dimensional curved surface lens effect and its propagation in 2 d plane lens effect, instead of being placed in the surface concave and convex lens interference of objects. Several strange acoustic phenomena, such as invisibility cloak, Luneburg lens and Fisheye Lens, have been realized by simulation. By adjusting the gradient distribution of refractive index of the lens electrically, acoustic devices with different functional waveforms can be switched. The research results provide theoretical guidance for the design of a new type of multifunctional lens. © 2025 SPIE.

关键词： Ultrasonic imaging

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A Review of aircraft Ground Taxi control Techniques

A Review of Aircraft Ground Taxi Control Techniques

引用

2024 CSAA/IET International Conference on aircraft Utility Systems, AUS 2024

作者： Li, Bingyu Liu, Xiaochao School of Automation Science and Electrical Engineering Beihang University Beijing100191 China National Key Laboratory of Aircraft Integrated Flight Control Beihang University Beijing100191 China Key Laboratory of Advanced Aircraft Systems Beihang University Ministry of Industry and Information Technology Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China Tianmushan Laboratory Hangzhou310023 China

The extensive utilization of aircraft as a mode of transportation and the accelerated expansion of the aviation market have imposed heightened expectations on airport scheduling capabilities. To enhance the efficacy of aircraft ground operations and diminish the duration of runway occupation, the analysis of aircraft motion characteristics and the management of their ground taxiing trajectories assume greater significance. This paper provides an overview of aircraft ground taxiing control technology. This paper provides a brief overview of the key parameters and trajectory prediction methods involved in the aircraft landing process. The nonlinear analysis theory is employed to introduce the aircraft brake system stability and heading stability. Subsequently, the results of significant research on ground skidding control laws are presented. The fourth section presents a summary of the issues and technological developments in aircraft ground skid run control and outlines future research priorities in anti-skid brake control. © The Institution of Engineering & technology 2024.

关键词： aircraft GROUND TAXI NONLINEAR control STABILITY ANALYSIS TRAJECTORY PREDICTION

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Adaptive Containment control for Uncertain Networked Agent Systems with Second-Order Dynamics 13

Adaptive Containment Control for Uncertain Networked Agent S...

引用

13th IEEE Data Driven control and Learning Systems Conference, DDCLS 2024

作者： You, Long Lin, Boxian Yue, Jiangfeng Shi, Mengji Qin, Kaiyu Ren, Zili School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu611731 China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu611731 China National Laboratory on Adaptive Optics Chengdu611731 China

ISBN: (纸本)9798350361674

This article proposes a neural network-based adaptive distributed containment controller for second-order integral multi-agent systems with nonlinear dynamics and external disturbances. Firstly, the proposed controller effectively suppresses the effects of nonlinear dynamics and external disturbances while achieving containment control. Secondly, for the adaptive update law of neural networks, unlike existing studies, we simultaneously consider the influence of position error and velocity error on the convergence speed of the weight matrix. Further, two positive definite matrices are constructed to prove the stability of the system based on Lyapunov theory, and the upper bound for the containment errors is provided. Finally, the effectiveness of the proposed method is verified through numerical simulation experiments. © 2024 IEEE.

关键词： Adaptive control systems

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Event-based Neuro-Adaptive Containment control for Uncertain Networked Agent Systems With External Disturbances 43

Event-based Neuro-Adaptive Containment Control for Uncertain...

引用

43rd Chinese control Conference, CCC 2024

作者： You, Long Lin, Boxian Yue, Jiangfeng Li, Weihao Shi, Mengji Qin, Kaiyu University of Electronic Science and Technology of China School of Aeronautics and Astronautics Chengdu611731 China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu611731 China National Laboratory on Adaptive Optics Chengdu610209 China

ISBN: (纸本)9789887581581

In this work, the robust containment control problem of uncertain networked agent systems is addressed. The dynamics of both the followers and the leaders involve uncertain nonlinear components. Theoretically, a neural network-based adaptive control scheme with the event-triggered mechanism is designed for the follower agents to approach the convex hull which is composed of the leader agents. Furthermore, a unified event-triggered mechanism is designed to ensure that the neural networks synchronize with the reduced update frequency of the robust controller, while ensuring that both are updated solely when the system error state reaches a predetermined triggering condition. The designed event-triggered containment control scheme minimizes unnecessary communication and computation resulting from periodic updates, thereby enhancing the efficiency of communication and computational resource utilization. Then, by utilizing the Lyapunov stability theorem, it is proven that all signals of the closed-loop system are globally uniformly ultimately bounded, and Zeno behavior is strictly excluded. Finally, the effectiveness of the proposed containment control scheme is verified through numerical simulation results. © 2024 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Adaptive control systems

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REDUNDANT DIGITAL BRAKE VALVE controlLER BIT DESIGN

REDUNDANT DIGITAL BRAKE VALVE CONTROLLER BIT DESIGN

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2024 CSAA/IET International Conference on aircraft Utility Systems, AUS 2024

作者： Jin, Hongtao Gao, Xiaolong Wu, Shuai Li, Chuandong School of Automation Science and Electrical Engineering Beihang University Beijing100191 China National Key Laboratory of Aircraft Integrated Flight Control Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China

High-speed switching valves are widely used in aerospace and other fields due to their simple structure and high resistance to contamination. The digital brake valve controller is the driving device of the digital brake valve, which requires high reliability. In this paper, a redundant digital brake valve controller scheme is proposed, and the corresponding BIT circuit is designed based on the structural characteristics of the brake valve driving circuit. The reliability model of the controller is established based on Markov process theory and analysed by simulation, and the results show that the reliability of this redundant digital brake valve controller is mentioned to be greatly improved. © The Institution of Engineering & technology 2024.

关键词： Markov processes

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