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第42届中国控制会议

作者： Yifang Tang Chaofang Hu Yongtai Hu School of Electrical and Information Tianjin University Aviation Key Laboratory of Science and Technology on Aircraft Control

Considering the special structural design and complex working conditions of flexible hypersonic vehicles, elastic vibrations can tremendously affect the control performance of hypersonic vehicles. In this paper, from the perspective of trajectory,a vibration suppression strategy for hypersonic vehicle including trajectory optimization and input shaping is proposed. The minimum sum of the squares of elastic modes and derivatives is selected as the performance index, and the optimal trajectory is calculated through direct collocation method. Then, an input shaper is designed for the first-order elastic mode to reshape the optimal trajectory. Meanwhile, the Tube model predictive control(Tube-MPC) is utilized to ensure the stable flight of the vehicle. Finally, the simulation results demonstrate the effectiveness of the proposed method.

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DEDNet: An Infrared and Visible Image Fusion Architecture based on Dual-Encoder and Channel-Picking/Gaussian-Filtering Models 8

DEDNet: An Infrared and Visible Image Fusion Architecture ba...

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8th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Li, Haitan Ding, Yan Huang, Xinliang Liang, Weidong Guo, Lingxi Key Laboratory of Dynamics and Control of Flight Vehicle Ministry of Education School of Aerospace Engineering Beijing Institute of Technology Beijing100081 China Science and Technology on Space Physics Laboratory Beijing China

ISBN: (数字)9781510653122

ISBN: (纸本)9781510653115

DenseFuse is a new approach for infrared and visible image fusion. Considering the single encoding strategy of DenseFuse, we propose a dual-encoder DenseNet (DEDNet), which develops a heterogenous image dual-encoder and a channel picking/Gaussian filtering based fusion strategy. The proposed method includes encoding layers, fusion strategy and decoder, in which encoding layers consist of dual encoders. Since infrared and visible images have different imaging mechanisms, the dual encoders can extract the features of infrared and visible images more effectively and improve the quality of fused images. The fusion strategy based on l1-norm's channel selection and Gaussian filtering improves the structural integrity and spatial correlation of the fused features. In the DEDNet, the infrared image is input to the infrared encoder to get the infrared features while the visible image is input to the visible encoder to get the visible features. Then, the fusion strategy fuses the infrared and visible features structurally and spatially. Finally, the decoder reconstructs the fused features to obtain the fused image. Experiments show that the DEDNet achieves competitive results in both subjective and objective evaluation metrics compared with other fusion approaches. © 2022 SPIE

关键词： Image fusion

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Multi-model Tube-MPC Fault-tolerant control for Flexible Hypersonic Vehicle 11

Multi-model Tube-MPC Fault-tolerant Control for Flexible Hyp...

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11th IEEE Data Driven control and Learning Systems Conference, DDCLS 2022

作者： Mi, Hanpeng Hu, Chaofang Yang, Xiaohe Hu, Yongtai School of Electrical and Information Engineering Tianjin University Tianjin300072 China Aviation Key Laboratory of Science and Technology on Aircraft Control Facri Xi'an710065 China

ISBN: (数字)9781665496759

ISBN: (纸本)9781665496759

For the large flight envelope and high maneuverability of flexible hypersonic vehicle, a Tube-Mpc fault tolerant control strategy based on multiple models is presented. First, the flight area is divided into subspaces. In each subspace, a control-oriented linearized submodel is constructed using the Jacobian linearization method, and fault and parameter uncertainties are included in the additional disturbance terms. Then, a fault-tolerant controller based on Tube-MPC is designed for the submodel to achieve the stability control of the aircraft in the local range. Finally, each submodel controller is weighted by an appropriate multi-model weighting strategy to obtain the final control law. This strategy ensures the stable flight of the flexible hypersonic vehicle in the failure state throughout the flight envelope. The simulation results show that the proposed control method is effective. © 2022 IEEE.

关键词： Hypersonic vehicles

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Precise orbit determination for TH02-02 satellites based on BDS3 and GPS observations

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Chinese Journal of Aeronautics 2023年第5期36卷 475-485页

作者： Houzhe ZHANG Bing JU Defeng GU Ying LIU Kai SHAO Xiaojun DUAN Zhiyong HUANG College of Science National University of Defense TechnologyChangsha 410073China National Key Laboratory of Science and Technology on Aerospace Flight Dynamics Beijing Aerospace Control CenterBeijing 100094China MOE Key Laboratory of TianQin Mission TianQin Research Center for Gravitational PhysicsFrontiers Science Center for TianQinCNSA Research Center for Gravitational WavesSun Yat-sen University(Zhuhai Campus)Zhuhai 519082China School of Artificial Intelligence Sun Yat-sen University(Zhuhai Campus)Zhuhai 519082China School of Physics and Astronomy Sun Yat-sen University(Zhuhai Campus)Zhuhai 519082China Information Engineering University Zhengzhou 450001China

The Tianhui-202(TH02-02)satellite formation,as a supplement to the microwave mapping satellite system Tianhui-201(TH02-01),is the first Interferometric Synthetic Aperture Radar(InSAR)satellite formation-flying system that supports the tracking of BeiDou global navigation Satellite system(BDS3)new B1C and B2a ***,the twin TH02-02 satellites also support the tracking of Global Positioning System(GPS)L1&L2 and BDS B1I&B3I *** the spaceborne receiver employs two independent boards to track the Global Navigation Satellite System(GNSS)satellites,we design an orbit determination strategy by estimating independent receiver clock offsets epoch by epoch for each GNSS to realize the multi-GNSS data fusion from different *** performance of the spaceborne receiver is evaluated and the contribution of BDS3 to the kinematic and reduced-dynamic Precise Orbit Determination(POD)of TH02-02 satellites is *** tracking data onboard shows that the average number of available BDS3 and GPS satellites are 8.7 and 9.1,*** carrier-to-noise ratio and carrier phase noise of BDS3 B1C and B2a signals are comparable to those of ***,strong azimuth-related systematic biases are recognized in the pseudorange multipath errors of B1C and *** pseudorange noise of BDS3 signals is better than that of GPS after eliminating the multipath errors from specific *** the GPS-based reduced-dynamic orbit with single-receiver ambiguity fixing technique as a reference,the results of BDS3-only and BDS3+GPS combined POD are *** Root Mean Square(RMS)of orbit comparison of BDS3-based kinematic and reduced-dynamic POD with reference orbit are better than 7 cm and 3 cm in three-Dimensional direction(3D).The POD performance based on B1C&B2a data is comparable to that based on B1I&*** precision of BDS3+GPS combined kinematic orbit can reach up to 3 cm(3D RMS),which has a more than 25%improvement relative to the GPS-only *** addi

关键词： BDS3 Multi-GNSS Precise orbit determination Spaceborne GNSS receiver TH02-02

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Hypersonic Vehicle Tube-MPC Fault-Tolerant control Method Based on Multi-objective Trajectory Optimization 18th

Hypersonic Vehicle Tube-MPC Fault-Tolerant Control Method Ba...

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18th Chinese Intelligent Systems Conference, CISC 2022

ISBN: (纸本)9789811962028

In order to reduce the complexity of controller design and improve the real-time performance of control, a hypersonic vehicle Tube-MPC fault-tolerant control method based on multi-objective trajectory optimization is proposed. For the maneuver trajectory tracking problem under actuator saturation and fault, the flight structure is divided into two layers: reference trajectory re-planning and fault-tolerant control. In the upper layer - trajectory reprogramming layer, in order to make the aircraft successfully complete the long-span maneuver task and reduce the computational burden of the control layer, combined with the dynamic characteristics of the aircraft, as well as the state and control input constraints, the multi-objective online trajectory optimization method based on fuzzy satisfaction order is studied, and the maneuver command is reprogrammed online. In the lower fault-tolerant control layer, a fault-tolerant controller based on Tube-MPC is designed to ensure the stability of the control system. Finally, the effectiveness of the proposed method is verified by simulation. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Hypersonic vehicles

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An Independent Degree-eight Mars Gravity Field Model and the Expected Results from the Tianwen-1 Mission

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Research in Astronomy and Astrophysics 2023年第10期23卷 267-276页

作者： Shanhong Liu Jianfeng Cao Jianguo Yan Hao Huang Xie Li Jean-Pierre Barriot National Key Laboratory of Science and Technology on Aerospace Flight Dynamics Beijing 100094China Beijing Aerospace Control Center Beijing 100094China State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China Department of Astronomy Beijing Normal UniversityBeijing 100875China Observatoire Géodésique de Tahiti University of French PolynesiaF-98702 Faa’aBP 6570 TahitiFrench PolynesiaFrance

Tianwen-1 is China's first independent interplanetary exploration mission,targeting Mars,and includes orbiting,landing,and rover *** to previous Mars missions,the Tianwen-1 orbiter was designed for polar orbits during the scientific mission period but has an exceptional eccentricity of approximately *** provide the first independent eight-degree Martian gravity field model in this paper,which was developed exclusively by a team working in China with our independent software as well,based on about two months of radiometric Doppler and range data from only the Tianwen-1 *** model is independent from the models created by the groups at NASA Jet Propulsion laboratory and Goddard Space flight Center in the United States,as well as the Centre National d'Etudes Spatiales in ***,in order to optimize the engineering and scientific benefits,we proposed a number of potential orbits for the extended Tianwen-1 *** order to solve a higher-degree independent Mars gravity field model,the viability of modifying the perigee height was investigated,with the priority considerations of fuel savings and implementation hazards being controlled.

关键词： gravitation planets and satellites:fundamental parameters methods:observational

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Pseudo-Augmentation Entropy Domain Adaptation for Video Unsupervised Action Recognition

Pseudo-Augmentation Entropy Domain Adaptation for Video Unsu...

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2024 China Automation Congress, CAC 2024

作者： Chen, Zhi Huang, Haibin Zhuang, Yufei Liu, Shuhua Zhong, Zhetao Shu, Hao School of Information Science and Engineering Harbin Institute of Technology Weihai Weihai264209 China School of Information Science and Engineering Harbin Institute of Technology Weihai China Weihai Key Laboratory ofAutonomous Control and Cooperation Technology for Unmanned Marine Systems Weihai Skysailing Technology Co. Ltd. Weihai264209 China Weihai Huamei Aviation Technology Co. Ltd Weihai264200 China

ISBN: (纸本)9798350368604

This research tackles the challenge of video unsupervised domain adaptation (VUDA) in human action recognition, focusing on deploying models trained in well-lit conditions to poorly-lit environments. Current unsupervised domain adaptation (UDA) techniques mitigate performance degradation by aligning source and target domains through adversarial training. However, these approaches fail to enhance low-light images, resulting in information loss and suboptimal performance in dark settings. To address this issue, we introduce Pseudo-Augmentation Entropy Domain Adaptation (PANDA), an entropy theory-based method that simultaneously complements unsupervised adversarial alignment by incorporating image enhancement as an auxiliary task. Evaluations on the HMDB-ARID datasets demonstrate that proposed PANDA outperforms standard VUDA baselines, boosting action recognition accuracy by an average of 6.3%. © 2024 IEEE.

关键词： Adversarial machine learning

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A RESEARCH OF THE DISCRETE DIGITAL BRAKE VALVE MATCHING DESIGN AND control FOR LARGE AIRCRAFT

A RESEARCH OF THE DISCRETE DIGITAL BRAKE VALVE MATCHING DESI...

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

作者： Wang, Yi Wu, Shuai Jin, Hongtao Li, Chuandong Gao, Xiaolong Jiao, Zongxia School of Automation Science and Electrical Engineering Beihang University Beijing100191 China National Key Laboratory of Aircraft Integrated Flight Control Beihang University Beijing100191 China Ministry of Industry and Information Technology Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China Tianmushan Laboratory Hangzhou310023 China

The aircraft braking system is a vital component of the aircraft, responsible for dissipating the kinetic energy of the aircraft and slowing it down to stop. In the field of aircraft braking systems, hydraulic systems with high power-to-weight ratios are currently the preferred choice. The brake control valve is a crucial component of the braking system, regulating the pressure of the essential components. The use of a discrete digital valve, designed to be pollution-resistant and fault-tolerant, can significantly enhance the performance of the braking system. The majority of existing designs and selections for discrete digital valves are based on experience, which may result in the unnecessary increase in system redundancy, volume and weight. This paper analyses the requirements of an aircraft braking system, combining the load situation and actual working conditions to determine the matching design of discrete digital valves. The efficacy of the designed brake valve in terms of performance and braking effectiveness is validated through the construction of a discrete digital valve braking system model. © The Institution of Engineering & technology 2024.

关键词： Aircraft hydraulic systems

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Adaptive wave-particle decomposition in UGKWP method for high-speed flow simulations

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Advances in Aerodynamics 2023年第1期5卷 518-543页

作者： Yufeng Wei Junzhe Cao Xing Ji Kun Xu Department of Mathematics Hong Kong University of Science and TechnologyHong KongChina School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Environment and Control for Flight Vehicle Xi’an Jiaotong UniversityXi’an710049China Department of Mechanical and Aerospace Engineering Hong Kong University of Science and TechnologyHong KongChina HKUST Shenzhen Research Institute Shenzhen 518057China

With wave-particle decomposition,a unified gas-kinetic wave-particle(UGKWP)method has been developed for multiscale flow *** the variation of the cell Knudsen number,the UGKWP method captures the transport process in all flow regimes without the kinetic solver’s constraint on the numerical mesh size and time step being determined by the kinetic particle mean free path and particle collision *** the current UGKWP method,the cell Knudsen number,which is defined as the ratio of particle collision time to numerical time step,is used to distribute the components in the wave-particle *** adaptation of particles in the UGKWP method is mainly for the capturing of the non-equilibrium *** this aspect,the cell Knudsen number alone is not enough to identify the non-equilibrium *** example,in the equilibrium flow regime with a Maxwellian distribution function,even at a large cell Knudsen number,the flow evolution can be still modelled by the Navier-Stokes *** specifically,in the near space environment both the hypersonic flow around a space vehicle and the plume flow from a satellite nozzle will encounter a far field rarefied equilibrium flow in a large computational *** the background dilute equilibrium region,the large particle collision time and a uniform small numerical time step can result in a large local cell Knudsen number and make the UGKWP method track a huge number of particles for the far field background flow in the original ***,in this region the analytical wave representation can be legitimately used in the UGKWP method to capture the nearly equilibrium flow ***,to further improve the efficiency of the UGKWP method for multiscale flow simulations,an adaptive UGKWP(AUGKWP)method is developed with the introduction of an additional local flow variable gradient-dependent Knudsen *** a result,the wave-particle decomposition in the UGKWP method is determined by both the cell and g

关键词： Adaptive wave-particle decomposition Multiscale modeling Acceleration method Non-equilibrium transport

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A Double Node Thin-Film Thermocouples for In-Situ Measurement

A Double Node Thin-Film Thermocouples for In-Situ Measuremen...

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2022 International Conference on Automation, Robotics and Computer Engineering, ICARCE 2022

作者： Ma, Rong Zhang, Meiju Zhang, Zhongkai Huang, Manguo Liang, Xiaobo Liu, Jiangjiang Liu, Zhaojun Tian, Bian Xi'An Jiaotong University State Key Laboratory for Mechanical Manufacturing Systems Engineering Xi'an China Aviation Key Laboratory of Science and Technology on Special Condition Monitoring Sensor Technology Beijing Changcheng Aeronautic Measurement and Control Technology Research Institute Beijing China

ISBN: (纸本)9781665475488

The design, fabrication, testing and implementation of a new high-performance tungsten-rhenium thin film thermocouple are introduced. In this paper, tungsten-rhenium TFTCs are taken as the research object, after simulation analysis in COMSOL software and design, it is made by screen-printing technology and magnetron sputtering. This kind of thin film thermocouple primarily utilizes two kinds of electrode materials with varying composition combination, mainly tungsten with 5% rhenium and tungsten with 26% rhenium. Furthermore, high-temperature annealing is performed to maintain the mechanical properties and thus improve thermoelectric performance. The results demonstrate that the performance is reliable in the temperature range of 150-600 C° with a repeatability of 2.02%, providing application value for high-temperature in-situ sensing. © 2022 IEEE.

关键词： Thermocouples

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