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8th IEEE International Conference on Fluid Power and Mechatronics, FPM 2019

作者： Gao, DIanrong Zhang, Zongyi Sun, Yanan Zhang, Yan Yanshan University College of Mechanical Engineering Qinhuangdao China National Key Laboratory of Science and Technology Aircraft Control Facri Xi'an China

ISBN: (纸本)9781728103112

Axial piston hydraulic motor pump is an innovative type of electro-hydraulic integrated power unit which combines the structure and principle of axial piston hydraulic pump with high-speed motor. With developmental frontier and application prospects, high-speed motor pump has attracted much attention. However, the heat problem of high speed motor pump is an important obstacle to its design and development. In this paper, the basic structure and the operation principle of high-speed motor pump are initially introduces and the causes and calculation method of heat loss are analyzed. With the finite element method and analytical method, the losses of each part of high-speed permanent magnetic hydraulic pump plunger motor are calculated and the influence of key parameters on the loss are analyzed. This study provides evidence for a further analysis of the temperature field of high-speed motor pump and a reference for the design of high-speed motor pump. © 2019 IEEE.

关键词： Heat losses

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Design of a Real-Time UAV Fault Injection Simulation System

Design of a Real-Time UAV Fault Injection Simulation System

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2019 IEEE International Conference on Unmanned Systems, ICUS 2019

作者： Wen, Jiayun Ji, Hongxia Wang, Honglun Zhang, Menghua Li, Dawei Wu, Jianfa Beihang University Sch. of Automat. Sci. and Elec. Engineering Science and Technology on Aircraft Control Laboratory Beijing China

ISBN: (纸本)9781728137926

In order to train the capability of unmanned aerial vehicle (UAV) operators to deal with the fault, and verify the effectiveness of the fault detection and processing scheme, a UAV fault injection simulation system is designed. Based on the advanced distributed architecture, the system performs real-time simulation and has good scalability. Wide coverage of fault scenarios could reappear by the distributed closed-loop simulation system. This system ensures the accuracy of the simulation results and meanwhile provides an intuitive feeling in the visual display module. The application results show that the simulation system has good real-time performance, high fidelity, and immersion. It provides effective support for verifying the processing ability of the UAV system to deal with faults and the rationality of the emergency response plan. © 2019 IEEE.

关键词： Fault detection

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A New Simulation Environment Based on Airsim, ROS, and PX4 for Quadcopter aircrafts

A New Simulation Environment Based on Airsim, ROS, and PX4 f...

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International Conference on control, Automation and Robotics (ICCAR)

作者： Chenxiang Ma You Zhou Zhiqiang Li Aircraft swarm intelligent sensing and cooperative control Key Laboratory of Sichuan Province University of Electronic Science And Technology of China Chengdu Sichuan China

ISBN: (数字)9781728161396

ISBN: (纸本)9781728161402

In recent years, quadcopter aircrafts are widely used in various fields. Nowadays, the test methods for quadcopter can't meet the test requirements well. There are many shortcomings, such as it is inconducive for construction, not real enough, long development cycle, and so on. Aiming at these problems, this paper constructs a quadcopter aircrafts simulation environment based on AirSim, ROS, and PX4. Firstly, this paper introduces AirSim, ROS(Robot Operating System) and PX4 SITL (Software in the Loop). Secondly, this article describes the framework of this work and the communication way between different parts. Thirdly, two similar experiments were separately carried out in the simulation environment and the real environment. Finally, through the comparison of the test results, it proves that this simulation environment is real and efficient.

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A Quantum-behaved Pigeon-Inspired Optimization approach to Explicit Nonlinear Model Predictive controller for quadrotor

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International Journal of Intelligent Computing and Cybernetics 2018年第1期11卷 47-63页

作者： Ning Xian Zhilong Chen Science and Technology on Aircraft Control Laboratory Beihang University(BUAA)BeijingChina

Purpose–The purpose of this paper is to simplify the Explicit Nonlinear Model Predictive controller(ENMPC)by linearizing the trajectory with Quantum-behaved Pigeon-Inspired Optimization(QPIO).Design/methodology/approach–The paper deduces the nonlinear model of the quadrotor and uses the ENMPC to track the *** the ENMPC has high demand for the state equation,the trajectory needed to be differentiated many *** the trajectory is complicate or discontinuous,QPIO is proposed to linearize the *** the linearized trajectory will be used in the ***–Applying the QPIO algorithm allows the unequal distance sample points to be acquired to linearize the *** with the equidistant linear interpolation,the linear interpolation error will be *** implications–Small-sized quadrotors were adopted in this research to simplify the *** model is supposed to be accurate and differentiable to meet the requirements of ***/value–Traditionally,the quadrotor model was usually linearized in the *** this paper,the quadrotormodel waskept nonlinear and the trajectorywill be *** sample points were utilized to linearize the *** this way,the authors can get a smaller interpolation *** method can also be applied to discrete systems to construct the interpolation for trajectory tracking.

关键词： Explicit Nonlinear Model Predictive controller Linearized trajectory Quantum-behaved Pigeon-Inspired Optimization

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Sampled-Data Observer Design With Exponential Time-Varying Gains for Semilinear Parabolic PDE Systems

Sampled-Data Observer Design With Exponential Time-Varying G...

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Chinese Automation Congress (CAC)

作者： Zi-Peng Wang Huai-Ning Wu Han-Xiong Li Tingwen Huang Tao Shen School of Electrical Engineering University of Jinan Jinan China Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beihang University Beijing China City University of Hong Kong Hong Kong Science Program Texas A&M University at Qatar Doha Qatar HIT Robot Group Co. Ltd China

ISBN: (纸本)9781665426480

For semilinear parabolic PDE systems, the sampled-data observer (SDO) design under spatially point measurements (SPMs) with exponential time-varying gains is concerned. On basis of a Lyapunov functional, a SDO with exponential time-varying gains under SPMs via linear matrix inequalities is presented to guarantee the exponential stability of estimation error PDE system. Lastly, two numerical examples are provided to support the proposed SDO design approach.

关键词： Estimation error Automation Stability Observers Gain measurement Linear matrix inequalities control theory

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Fault-Tolerant control for Carrier Rocket Actuator Based on Adaptive control with Constraints

Fault-Tolerant Control for Carrier Rocket Actuator Based on ...

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Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Qiushi Niu Qingdong Li Yishi Liu Liang Han Zhang Ren School of Automation Science and Electrical Engineering Science and Technology on Aircraft Control Laboratory Beihang University Beijing China School of Sino-French Engineer Beihang University Beijing China

ISBN: (数字)9781728176840

ISBN: (纸本)9781728176857

A fault-tolerant control (FTC) for carrier rocket with actuator fault using model reference adaptive control (MRAC) method is proposed in this paper. Firstly, the model for the carrier rocket with actuator fault is established by treating the fault as disturbance. Based on the flight dynamic model, the linear quadratic regulator (LQR) technique is used as the basic controller to make the output response follow the command signal. Moreover, in the case of actuator constraints, the fault-tolerant controller is designed using MRAC to minigate the effect of actuator fault with anti-windup compensation. Finally, a numerical example is given to demonstrate the effectiveness of the proposed methods.

关键词： Actuators Rockets Fault tolerance Adaptation models Fault tolerant systems Mathematical model Adaptive control

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Missile Attitude control Based on Deep Reinforcement Learning

Missile Attitude Control Based on Deep Reinforcement Learnin...

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International Conference on control and Automation (ICCA)

作者： Bohao Li Fei Ma Yunjie Wu State Key Laboratory of Virtual Reality Technology and System Beihang University Beijing China School of Automation Science and Electrical Engineering Beihang University Beijing China Science and Technology on Aircraft Control Laboratory Beihang University Beijing China

ISBN: (数字)9781728190938

ISBN: (纸本)9781728190945

Deep reinforcement learning (DRL) has been one of the research hotspots in the areas of control. In this paper, we focus on the study of missile attitude control system using DRL. An novel PID controller based on deep deterministic policy gradient(DDPG) algorithm is presented, which could applied to the self-tuning of parameters. The framework of the adaptive DDPG-PID controller is given. The controller takes flight information as input and takes rudder angle as output. A reward function related to the system error is designed, which can be used to train the DDPG algorithm effectively. Simulation results show that the adaptive DDPG-PID controller has a faster convergence velocity, reduces the overshoot and oscillation, achieves higher accuracy tracking control to target.

关键词： Software algorithms Missiles Heuristic algorithms Earth Adaptation models Task analysis Solid modeling

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Sampled-Data Observer Design for Space-Varying Distributed Parameter Systems

Sampled-Data Observer Design for Space-Varying Distributed P...

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第三十九届中国控制会议

作者： Zi-Peng Wang Huai-Ning Wu Tingwen Huang School of Electrical Engineering University of Jinan Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical EngineeringBeihang University Science Program Texas A&M University at Qatar

This paper considers the sampled-data observer design problem of space-varying distributed parameter systems（DPSs）. By utilizing a Lyapunov functional, a sampled-data observer design is developed by spatial linear matrix inequalities（SLMIs） to guarantee the exponential stability for the estimation error DPS. Furthermore, to solve SLMIs, the sampled-data observer design for space-varying DPSs is formulated as an LMI feasibility problem. Lastly, simulation results of a numerical example are provided to illustrate the effectiveness of the proposed method.

关键词： Sampled-data observer distributed parameter systems（DPSs） spatial linear matrix inequality（SLMI）

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Robust Sliding Mode control for a 2-DOF Lower Limb Exoskeleton Base on Linear Extended State Observer

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Mechanical Engineering science 2020年第2期2卷 1-6,I0004页

作者： Zhenlei CHEN Qing GUO Yao YAN Dan JIANG School of Aeronautics and Astronautics University of Electronic Science and Technology of ChinaChengduChina Aircraft Swarm Intelligent Sensing and Cooperative Control Key Laboratory of Sichuan Province ChengduChina School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengduChina

For the 2-Degree of Freedom(DOF)lower limb exoskeleton,to ensure the system robustness and dynamic performance,a linearextended-state-observer-based(LESO)robust sliding mode control is proposed to not only reduce the influence of parametric uncertainties,unmodeled dynamics,and external disturbance but also estimate the unmeasurable real-time joint angular velocity ***,via Lyapunov technology,the stability of the corresponding LESO and controller is *** appropriate and reasonable simulation was carried out to verify the effectiveness of the proposed LESO and exoskeleton controller.

关键词： lower limb exoskeleton linear-extended-state-observer robust sliding model control uncertain nonlinearity

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Simulation and analysis of high-reliability braking system of aircraft based on self-feed energy nonsimilar margin

Simulation and analysis of high-reliability braking system o...

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CSAA/IET International Conference on aircraft Utility Systems 2020, AUS 2020

作者： Wang, Xiyu Shang, Yaoxing Hu, Haiying Qiu, Binghui Teng, Fengjian Zhang, Hao Jiao, Zongxia Liu, Xiaochao School of Automation Science and Electrical Engineering Beihang University Beijing100191 China AVIC Jiangxi Hongdu Aviation Industry Group Company Ltd Nanchang330000 China Beijing Aeronautical Technology Research Center Beijing100076 China Aerospace System Engineering Shanghai Shanghai201109 China Research Institute for Frontier Science Beihang University Beijing100191 China Science and Technology on Aircraft Control Laboratory Beihang University Beijing100191 China Ningbo Institute of Technology Beihang University Ningbo315800 China

ISBN: (纸本)9781839535635

As one of the key and important airborne systems, aircraft braking systems mostly use traditional centralized hydraulic sources. With the new concept of "multi-electric aircraft", the aircraft energy supply system has further branched. This article introduces an integrated hydraulic brake device. It does not require an on-board hydraulic source, and can directly convert the energy of the wheel rotation when the aircraft lands, to complete the braking function. Using Simulink/SimHydraulics module, a corresponding model of aircraft brake integrated hydraulic device was established. The function of this self-feeding hydraulic brake device was verified through simulation and analysis. This method provides a new way to further study the braking system. © 2020 Institution of Engineering and technology. All rights reserved.

关键词： Electric aircraft

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