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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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Research On The Layout Plan Of Inerting Gas Filling Inlet And Outler Of A Complex Fuel Tank

Research On The Layout Plan Of Inerting Gas Filling Inlet An...

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2022 CSAA/IET International Conference on aircraft Utility Systems, AUS 2022

作者： Wang, Chenchen Wang, Yangyang Li, Chaoyue AVIC Nanjing Engineering Institute of Aircraft Systems The Aviation Electromechanical System Integration of Aviation Science and Technology Key Laboratory Nanjing211106 China School of Mechanical and Electrical Engineering Jinling Institute of Technology Nanjing211169 China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

According to the inert gas filling requirements of a certain type of aircraft fuel tank, three different inlet and outlet layout plans are designed. Based on CFD, the simulation calculation of the inert gas filling effect of the fuel tank under different inlet and outlet layout plans is calculated. The changes of the oxygen volume fraction (Vo2) in the gas space in the tank under different inert gas flow rates, concentrations and fuel load are analyzed. The calculations show that with the increase of inerting time, the average Vo2 in the tank decreases, and finally tends to the Vo2 of inert gas. Considering the overall average Vo2 of the tank and the uniform distribution of inert gas in the gas space of each tank, it can be seen that the best inerting performance can be achieved by adopting the inlet and outlet layout plan 3. The calculation results can provide a basis for the optimization of the gas distribution design of the tank inerting system. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Volume fraction

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Deep Reinforcement Learning Based HVAC Optimization control Algorithm Application

Deep Reinforcement Learning Based HVAC Optimization Control ...

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2023 IEEE International Conference on Electrical, Automation and Computer Engineering, ICEACE 2023

作者： Zeng, Linzhe Cen, Jian Liu, Xi Wu, Yinbo Tan, Xiaowei School of Automation Guangzhou Intelligent Building Equipment Information Integration and Control Key Laboratory Guangdong Polytechnic Normal University Guangzhou China Co. Ltd Guangdong Sinro Air-conditioning Technology Co. Ltd Guangzhou China

ISBN: (纸本)9798350309614

To address the shortcomings of Heating, Ventilation, and Air Conditioning systems (HVAC) with low energy efficiency, this paper introduces the application and effectiveness of deep reinforcement learning in HVAC systems. Deep reinforcement learning mainly includes model-based algorithms and model-free algorithms. Model-based algorithms require a large amount of system and environment knowledge, which is usually difficult to obtain, while model-free algorithms do not need this knowledge to model the environment, so model-free deep reinforcement learning is of high research value. The applications of model-free deep reinforcement learning algorithms in the HVAC domain are reviewed and divided into three categories: value function-based methods, policy gradient-based methods, and actor-critic-based methods, and the three categories are also described in detail. Finally, the shortcomings of current deep reinforcement learning in HVAC control systems are summarized, and the future application directions are prospected. © 2023 IEEE.

关键词： actor-critic Deep reinforcement learning HVAC control system policy gradient value function

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Performance Analysis of Partial Closed-loop Air Cycle System with a Power Turbine

Performance Analysis of Partial Closed-loop Air Cycle System...

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2022 CSAA/IET International Conference on aircraft Utility Systems, AUS 2022

作者： Lu, Qihang Wu, Yan Gao, Zanjun Zhang, Dalin Key Laboratory of Aircraft Environment Control and Life Support Ministry of Industry and Information Technology Nanjing University of Aeronautics & Astronautics Nanjing China Nanjing Engineering Institute of Aircraft Systems AVIC Nanjing Jincheng China

ISBN: (数字)9781839537769

ISBN: (纸本)9781839537769

In this paper, a new architecture of Air Cycle System (ACS) is presented based on advanced F-15 ACS, F-35 ACS and other air cycle systems. The new architecture is a high-pressure water separation (HPWS) system driven by power turbine with a compressor as an independent air-supplying resource. In new ACS, the engine bleed air after driving power turbine is discharged into the atmosphere and the power turbine supplies shaft work to two compressors of the system. One compressor is the component of HPWS, and the other is the resource of pressurized cabin air supply which isolates the engine bleed air from ACS and improve supply air quality. The system performance is analysed which concludes energy consumption, adaptability, adjustability. The research is carried out in many aspects, such as cabin supply air flow, circulating pressure and airflow, flight altitude, flight speed and avionics heat loads. The results show that the new-type architecture reduces the engine bleed air and it is adjustable and adaptable which makes it flexible. The work done in the paper provides a new reference for ACS or integrated aircraft thermal management. © 2022 IET Conference Proceedings. All rights reserved.

关键词： Engines

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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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Evaluation of failure criteria for residual tensile strength of composite laminates with circular holes 63

Evaluation of failure criteria for residual tensile strength...

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63rd International Conference on Vibroengineering

作者： Hu, Botao Chen, Xiangming Deng, Fanchen Sun, Xiaobo National Key Laboratory of Strength and Structural Integrity Aircraft Strength Research Institute of China Xi’an710065 China Xi’an Modern Control and Technology Institute China North Industries Group Corporation Limited Xi’an710065 China

To evaluate the effect of circular holes on the mechanical properties of laminated composite plates with different sizes, static tensile destructive tests were carried out on four different types of composite laminated plates with different layups and aperture sizes. The experimental results showed that for the four types of layup, the strength of the specimens with a diameter of 6.35 mm decreased by 44.3 %, 51.3 %, 48.0 %, and 39.4 % compared to intact specimens, and the greater the proportion of 0° layup, the greater the strength decrease of the perforated specimens. Under the same layup, as the diameter of the circular hole increased, the tensile strength decreased rapidly with the constant ratio of diameter to width. Based on the experimental results, three commonly used models for predicting the residual strength of perforated laminated composite plates, including point stress criterion, average stress criterion, and stress field intensity method, were evaluated. The results showed that the average stress criterion had higher accuracy compared to the point stress criterion and the stress field intensity method. Copyright © 2023 Botao Hu, et al.

关键词： Tensile strength

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Attitude control for Flying-Wing UAV Based on Active Disturbance Rejection control

Attitude Control for Flying-Wing UAV Based on Active Disturb...

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International Conference on Guidance, Navigation and control, ICGNC 2024

作者： Shen, Boyuan Huang, Xi Li, Qingxian Qi, Pengyuan School of Automation 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

ISBN: (纸本)9789819622115

So as to deal with the poor static stability, strong nonlinear aerodynamic parameters and serious coupling of control rudder surface of flying-wing UAV. On the basis of the theory of active disturbance rejection control (ADRC), this attitude controller consists of two parts, which are outer angle controller and inner angle velocity controller. The simulation displays that this attitude controller shows advantageous control effect and strong robustness. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Disturbance rejection

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Design of a Reconfigurable Bandnotch Antenna for UWB Applications

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Progress In Electromagnetics Research C 2022年 127卷 101-112页

作者： Jing, Hua He, Ge Sun, Jiahao Wang, Shengyao School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu China Institute of Electronic and Information Engineering of UESTC in Guangdong Dongguan China Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province Chengdu China

—In order to improve the practicability and versatility of ultra-wideband (UWB) antennas, a reconfigurable band notch antenna is proposed in this paper. It has a compact size of 18 mm × 16 mm × 1.6 mm. The reconfigurable band notch function is realized by two small tunable units. The tunable unit makes up of a split ring resonator (SRR), a dielectric substrate, and a varactor diode. The simulation results show that the antenna combines the functions of band notch emergence, removal, and movement. The applied reconfigurable method can effectively broaden the continuous movement range of band notch. The measurement proves that the antenna has the band notch reconfigurable function, and the measured results are in good agreement with the simulation ones. The radiation patterns are measured, which are stable and consistent under two modes with and without band notch, showing omnidirectional radiation characteristics. These research results provide reference value for the design of band notch UWB antenna shielding civil narrowband communication band. © 2022, Electromagnetics Academy. All rights reserved.

关键词： Ultra-wideband (UWB)

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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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The Configuration of Medium Voltage Distribution Transformer for Extremely High Voltage laboratory 7

The Configuration of Medium Voltage Distribution Transformer...

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7th International Conference on Smart Grid and Smart Cities, ICSGSC 2023

作者： Duan, Zemin Si, Xiaoliang Zhang, Song Zhang, Xining Li, Hua National Key Laboratory of Electromagnetic Information Control and Effects Hefei China Aviat. Sci. and Technol. Key Laboratory of Strong Electromagnetic Environment Protection Technology Hefei China Anhui Province Key Laboratory of Aircraft Lightning Protection Hefei China Institute of Plasma Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China University of Science and Technology of China Hefei China

ISBN: (纸本)9798350305913

Transformer is the most important component in power distribution design, and its long-term operation cost determines the operation cost of power distribution system. Therefore, it is necessary to analyze the transformer configuration considering efficiency and economy for extremely high voltage laboratory, which is used for study the lightning impact and protection of aircraft. In this paper, a medium voltage distribution system is designed to adapt the operation of extremely high voltage laboratory for lightning test. We analyze the basic information such as the type of distribution transformer, power loss and core material Then the model and capacity selection of the transformer are calculated and compared based on the actual load category and operation curve. According to the above analysis, a transformer configuration network with the lowest total cost in thirty years is proposed. This scheme provides the technical support for the implementation of aircraft lightning protection experiments. At the same time, the research can also be extended to power generation and distribution, laboratories or buildings with similar power architecture, which has promising application value. © 2023 IEEE.

关键词： Lightning

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