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54th AIAA Aerospace Sciences Meeting, 2016

作者： Okai, Keiichi Himeno, Takehiro Watanabe, Toshinori Yachi, Yuusaku Shinozaki, Noboru The University of Tokyo Advanced Aeropropulsion Laboratory Department of Aeronautics and Astronautics 7-3-1 Hongo BunkyoTokyo113-8656 Japan The University of Tokyo Department of Aeronautics and Astronautics 7-3-1 Hongo BunkyoTokyo113-8656 Japan IHI Corporation Electronic Control Engineering Group Control System Engineering Department Research and Engineering Division Aero-Engine and Space Operation 229 Tonogawa Mizuho-machi Nishitama-gun Tokyo180-1297 Japan IHI Aerospace Co. Ltd Technologies Development Depertment 900 Fujiki TomiokaGunma370-2398 Japan

ISBN: (数字)9781624103933

ISBN: (纸本)9781624103933

In 2012, the first EcoDemonstrator flew to conduct various experiments. One of the experiments was a Regenerative Fuel Cell (RFC) system to compensate a demand-requirement gap separating the power in an aircraft system. The RFC comprises a Proton Exchange Membrane (PEM) Fuel Cell and Electrolyzer and other auxiliary components. Commercialization of this system requires restrictions of volume and mass for flight application. An important issue for PEM fuel cells is water management near the membrane. Compact PEM fuel cells require gravity-assisted water transport. This paper describes simplified cell channel paths to conduct numerical calculations to ascertain the effects of combined gas channels with an anode and cathode. The chosen parameters are a geometrical pattern and a flow rate (inflow velocity). Ion transport with water and a membrane water balance between the anode and cathode sides are simply incorporated. Although the calculations themselves do not include the gravity effect, the result suggests that a proper combination of the gas channels enhances proper water balance in the membrane. © 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

关键词： Anodes

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On asymptotic stability for nonlinear ADRC based control system with application to the ball-beam problem

On asymptotic stability for nonlinear ADRC based control sys...

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American control Conference

作者： Jie Li Xiaohui Qi Yuanqing Xia Zhiqiang Gao Department of Unmanned Aerial Vehicle Engineering Mechanical Engineering College Shijiazhuang 050003 China School of Automation Beijing Institute of Technology 100081 China Center for Advanced Control Technologies Cleveland State University Ohio 44115 USA

ISBN: (纸本)9781467386838

Active disturbance rejection control (ADRC) is a relatively new but very practical technology, which shows much promise in replacing PID as industry workhorse with unmistakable advantage in performance and practicality. This paper mainly concerns with a problem of fundamental nature: the asymptotic stability of nonlinear ADRC based control system, and applies ADRC to the ball-beam system to check the presented methods and the performance of ADRC. Firstly, the general nonlinear ADRC algorithm is introduced;then the asymptotical stability problem is transformed into that of determining whether a matrix or interval matrix is Hurwitz;finally the results of theoretical analysis are verified in simulations and experiments using the ball-beam platform, demonstrating the convenience and effectiveness of the proposed methods, in addition to the good performance of ADRC.

关键词： Asymptotic stability control systems Stability criteria Mathematical model Observers Analytical models asymptotic stability region control systems Stability criteria ANALYSIS MODELS Mathematical Model Observers control system applications stability problems beam system

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MoS2 heterostructure with tunable phase stability: Strain induced interlayer covalent bond formation

arXiv

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arXiv 2017年

作者： Ouyang, Bin Xiong, Shiyun Yang, Zhi Jing, Yuhang Wang, Yongjie National Center for Supercomputing Applications University of Illinois at Urbana-Champaign UrbanaIL61801 United States Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou JiangSu215123 China College of Physics and Optoelectronics Taiyuan University of Technology Taiyuan ShanXi030024 China Key Lab of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan ShanXi030024 China Department of Astronautical Science and Mechanics Harbin Institute of Technology Harbin Heilongjiang150001 China Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign UrbanaIL61801 United States Department of Electrical Engineering and Computer Engineering University of Michigan Ann ArborMI48109 United States

Due to the distinguished properties offered by different structural phases of monolayer MoS2, phase engineering design are urgently required for achieving switchable structural phase. Strain engineering is widely accepted as a clean and flexible method, however, can not be achieved in engineering monolayer MoS2 phase transition because the critical biaxial strain required (~15%) is much larger than measured elastic limit (~11%). In this study, employing density functional theoretical calculations, it has been found out that with the forming of heterostructure between MoS2 with buckled 2D materials such as silicence, germanene and stanene, only a small strain can trigger the phase transition. As being suggested by the constructed phase stability diagram, biaxial deformation as low as 3% in MoS2/silicene and MoS2/stanene sandwich structure, would be sufficient to induce the structural phase transition in MoS2 lattice. This strain falls well within experimental elastic limit, thus would be feasible to realize in experiment. The origin of such behavior can be understood as strain induced interlayer covalent bond formation, which finally make MoS2 lattice more sensitive to external strain. This theoretical work provides one realistic route for achieving flexible phase stabilities in experimental design. Copyright © 2017, The Authors. All rights reserved.

关键词： Molybdenum compounds

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Sensor Fault Diagnosis and Fault Tolerant control using intelligent-Output-Estimator Applied on Quadrotor UAV

Sensor Fault Diagnosis and Fault Tolerant Control using inte...

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International Conference on Unmanned Aircraft systems

作者： Younes A1 Younes Abdelhamid Rabhi Hassan Noura Ahmed El Hajjaji Mechanical Engineering Faculty at Higher Colleges of Technology Al Ain UAE and PhD student at the University of Picardie Jules Verne Amiens France Assistant Professor in Modeling Information & System Lab - Control & Vehicle Group- at University of Picardie Amiens France Professor and Chairman of Electrical Engineering Department at United Arab Emirates University A1 Ain UAE Professor in Modeling Information & System Lab - Control & Vehicle Group- at University of Picardie Amiens France

ISBN: (纸本)9781467393355

In this paper, Fault Diagnosis and Fault Tolerant control algorithms are proposed to compensate for a bias type sensor fault applied on the quadrotor vehicle. A novel output estimator design called intelligent Output-Estimator (iOE) is introduced to detect and isolate the sensor fault. The estimation of the fault magnitude is done through a proposed structured algorithm that senses the maximum error deviation between the output estimation and the measured outputs. Then the fault compensation is achieved by regenerating the desired path. Real-flight results validated the proposed algorithms and showed the sensor fault accommodation process.

关键词： iOE Sensor UAV

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vehicle-to-Infrastructure Communication Based Eco-Driving Operation at Multiple Signalized Intersections

Vehicle-to-Infrastructure Communication Based Eco-Driving Op...

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IEEE Conference on vehicle Power and Propulsion (VPPC)

作者： Qingfeng Lin Xuejin Du Shengbo Eben Li Zhennan Ye State Key Laboratory of Vehicle NVH and Safety Technology Chongqing Beijing Key Laboratory for Cooperative Vehicle Infrastructure System and Safety Control Beihang University Beijing China Department of Automotive Engineering Tsinghua University Beijing China Tianjin college University of Science and Technology Beijing Beijing China

ISBN: (纸本)9781509035298

Eco-driving using V2I communication at multiple intersections has significant fuel benefit for road transportation. This paper presents a fuel saving strategy for vehicle travelling in between two red signalized intersections. An optimal control problem (OCP) is formulated to minimize fuel consumption and solved by Legendre pseudo-spectral (LPS) method. It is found that the optimal driving operation falls into either two-stage or three-stage-mode. The occurrence of different states is related to intersection distance under certain speed limit. In addition, a sub-optimal operating strategy is proposed to determine the travelling trajectory for real time implementation, achieving a faster computational speed than LPS.

关键词： vehicles Acceleration Engines Fuels Optimization Roads vehicle dynamics

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PID parameters optimization research for hydro turbine governor by an improved fuzzy particle swarm optimization algorithm

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Open Electrical and Electronic engineering Journal 2016年 10卷 101-117页

作者： Chen, Gonggui Yangwei, Du Yanyan, Guo Shanwai, Huang Lilan, Liu Key Laboratory of Industrial Wireless Network and Networked Control of Ministry of Education Chongqing University of Posts and Telecommunications Chongqing400065 China Research Center on Complex Power System Analysis and Control Chongqing University of Posts and Telecommunications Chongqing400065 China The Department of Locomotive and Vehicle Engineering Wuhan Railway Vocational College of Technology Wuhan430205 China

Parameter optimization of water turbine regulating system (WTRS) is decisive in providing support for the power quality and stability analysis of power system. In this paper, an improved fuzzy particle swarm optimization (IFPSO) algorithm is proposed and used to solve the optimization problem for WTRS under frequency and load disturbances conditions. The novel algorithm which is based on the standard particle swarm optimization (PSO) algorithm can speed up the convergence speed and improve convergence precision with combination of the fuzzy control thought and the crossover thought in genetic algorithm (GA). The fuzzy control is employed to get better dynamics of balance between global and local search capabilities, and the crossover operator is introduced to enhance the diversity of particles. Two different types of WTRS systems are built and analyzed in the simulation experiments. Furthermore, the sum of regulating time and another number that is the integral of sum for absolute value of system error and the squared governor output signal is considered as the fitness function of this algorithm. The simulation experiments for parameter optimization problem of WTRS system are carried out to confirm the validity and superiority of the proposed IFPSO, as compared to standard PSO, Ziegler Nichols (ZN) algorithm and fuzzy PID algorithm in terms of parameter optimization accuracy and convergence speed. The simulation results reveal that IFPSO significantly improves the dynamic performance of system under all of the running conditions. © Gonggui et al.

关键词： Fuzzy control

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Corrigendum to “Stabilizing Parametric Region of Multiloop PID controllers for Multivariable systems Based on Equivalent Transfer Function”

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Mathematical Problems in engineering 2017年第1期2017卷

作者： Xiaoli Luan Qiang Chen Pedro Albertos Fei Liu Key Laboratory of Advanced Process Control for Light Industry Ministry of Education and the Institute of Automation Jiangnan University Wuxi 214122 *** Department of System Engineering and Automatica Universidad Politécnica de Valencia 46022 Valencia Spainupv.es

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Utilizing Fullerenols as Surfactant for Carbon Nanotubes Dispersions Preparation

Journal of Materials

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Journal of Materials 2017年第1期2017卷

作者： Jianlong Ji Chang Qiao Yali Liu Wendong Zhang Shengbo Sang Xing Yang Aoqun Jian Qianqian Duan Qiang Zhang Ying Liu Micro Nano System Research Center Key Lab of Advanced Transducers and Intelligent Control System of the Ministry of Education College of Information Engineering Taiyuan University of Technology Taiyuan 030024 *** Advanced Coal Mine Machinery and Equipment Collaborative Innovation Center of Shanxi Province College of Information Engineering Taiyuan University of Technology Taiyuan 030024 *** MEMS Laboratory Department of Precision Instruments and Mechanology Tsinghua University Beijing 100084 *** College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 ***

Dispersions of individual carbon nanotubes (CNTs) are crucial for nanodevices and polymer/CNTs nanocomposites. In this paper, stable and homogenous dispersions of individual multiwalled carbon nanotubes (MWCNTs) have been synthesized. The factors influencing the dispersibility mechanism, including the surfactant concentration and the pH value, have been investigated. SEM images display the impurities sticking on MWCNTs which have been removed. The oxygen-containing groups on the surface of MWCNTs sample have been detected through FT-IR and Raman spectra. All experimental results illustrate that using fullerenols as surfactant can greatly improve the dispersibility of MWCNTs. Moreover, the prepared dispersions exhibit good stability that the sediment percentage of fullerenols-MWCNTs is only 5.2% after 5 days.

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Design of the structural optimization for the upper limb rehabilitation robot

Design of the structural optimization for the upper limb reh...

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IEEE International Conference on Mechatronics and Automation

作者： Shuxiang Guo Jiange Gao Jian Guo Weijie Zhang Yuye Hu Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems and Biomedical Robot Laboratory Tianjin University of Technology Tianjin China Intelligent Mechanical Systems Engineering Department Kagawa University Takamatsu Japan Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin China

ISBN: (纸本)9781509023974

The exoskeleton robotic rehabilitation training system is a branch of the field of robotics, it is the external mechanical system that is consistent with the similar joints of the human body, and attached to the human body. With the development of exoskeleton rehabilitation robotic system, the biomechanics influence of device should be considered in rehabilitation training. This paper proposes a novel upper limb exoskeleton rehabilitation device based on biomechanics, which can be used in rehabilitation of upper limb for hemi paralysis patients. This system aims at helping hemi paralysis patients recover motor function of upper limb; in addition it is suitable for variety of patients. This system is portable and wearable, which consists of exoskeleton device, hepatic device (PHANTOM Premium), motor controllers and work station (computer). This paper proposes a structural optimization scheme in order to solve some problems of bowl's structure of the rehabilitation robot. The Pro/ENGINEER Wildfire (Pro/E) software is applied to get a three-dimensional modelling, kinematics simulation and dynamic analysis of the rehabilitation robot. From the analysis, the robot end motion simulation curves were obtained to verify the optimization structure reasonable and better motion characteristics. In the future, this structure will have a wide application prospect in the rehabilitation therapy field.

关键词： Robots Exoskeletons Wrist Jacobian matrices Gears Optimization Acceleration

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Design and kinematic simulation of a novel exoskeleton rehabilitation hand robot

Design and kinematic simulation of a novel exoskeleton rehab...

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IEEE International Conference on Mechatronics and Automation

作者： Shuxiang Guo Weijie Zhang Jian Guo Jiange Gao Yuye Hu Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems and Biomedical Robot Laboratory Tianjin University of Technology Tianjin China Intelligent Mechanical Systems Engineering Department Kagawa University Takamatsu Japan Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System Tianjin China

ISBN: (纸本)9781509023974

The rehabilitation exoskeleton robot is more and more used in the assisting stroke patients in implementing rehabilitation training. In this paper, a novel exoskeleton hand robot which was driven by cable has been proposed to aim at helping varieties of paralyses patients recover motor function. This exoskeleton hand rehabilitation robot system mainly consists of exoskeleton hand robot, EEG system, motor controllers unit, some sensors and a workstation. And the hand exoskeleton mechanism was portable, wearable and adjustable for patients doing home rehabilitation training. Based on the parameters from human hand, the kinematic model of hand robot was established to be used in designing and the kinematic simulation experiments about this exoskeleton hand robot were done. Through the simulation software ADAMS (Automatic Dynamic Analysis of Mechanical systems), the parameters of position, angle velocity and angle accelerated velocity (PVA) of proximate inter-phalanger (DIP) distal inter-phalanger joint were simulated. And then, the movement situation of the DIP joint was obtained according to the data from the position encoder. So the velocity curve and accelerated velocity curve were obtained by calculating the actual position function derivation. The simulated results showed that this exoskeleton hand robot has high movement ability to finish the continuous passive motion (CPM). Beside that, a comparison test was done to verify whether there were some motion blocks in wearing exoskeleton robot. Through analyzing the experimental data, the error between the actual position and the simulated position of the PIP joint of the finger was very small which verified the small interference of robot. These experiments demonstrated that the exoskeleton hand robot has high efficiency movement ability for stroke patients who need to do the finger rehabilitation training. In the future, the optimization design of the exoskeleton hand robot will be done in order to improve more mov

关键词： Exoskeletons Thumb Robot sensing systems Joints Training

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