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CSAA/IET International Conference on Aircraft Utility systems (AUS 2020)

作者： T. Liu Y. Zhang W. Wang J. Ju W. Yu Shanghai Aircraft Design and Research Institute Department of Flight Control System China Commercial Aircraft Corporation of China Ltd. Department of Science and Technology Management China Shanghai Jiaotong University Department of Automation School of Electronic Information and Electrical Engineering China

In this paper, the development of power driving technology for high lift system of modern commercial aircraft is presented. Three kinds of power driving technical schemes of high lift system are demonstrated together with their characteristics. Various applications of power drive technology on present mainstream aircrafts have been addressed and analyzed respectively. In addition to the analysis of existing power drive technology, this work presented that distributed electric power drive technology could be a potential future development trend. The paper can be read as a reference for selecting power driving technical scheme of high lift systems at conceptual design phase of a commercial aircraft.

关键词： aircraft power systems aircraft design engineering electric drives

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Fault tolerant control for high-order multi-agent systems with switching interaction topologies 11

Fault tolerant control for high-order multi-agent systems wi...

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11th CAA Symposium on Fault Detection, Supervision, and Safety for Technical Processes, SAFEPROCESS 2019

作者： Wang, Qing Liu, Yu'Ang Zhong, Kewei Dong, Chaoyang Hou, Yanze School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Shanghai Aerospace Control Technology Institute Shanghai201100 China School of Aeronautic Science and Engineering Beihang University Beijing100191 China Institute of Manned Space System Engineer CAST Beijing100094 China

ISBN: (纸本)9781728106816

Fault tolerant control (FTC) for high-order multi-agent systems (MAS) with switching interaction topologies are investigated via active disturbance rejection control (ADRC) approach. The influence of the dynamics uncertainties and the actuator fault functions are estimated by the designed extended state observer (ESO), and compensated in the designed control strategy real time. The closed-loop system is proved to be stable despite the actuator fault. The algorithm for the chosen of the parameters is also given. The simulation results demonstrate the effectiveness of the designed controller, the MAS can achieve the predefined switching time-varying formation. © 2019 IEEE.

关键词： Multi agent systems

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Development of Sheet Palletizing Manipulator Based on Multi-link Mechanism

Research Square

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Research Square 2020年

作者： Chen, Zhihua Wang, Shoukun Liu, Quan Wang, Junzheng Key Laboratory of Intelligent Control and Decision of Complex Systems School of Automation Beijing Institute of Technology Beijing100081 China Key Laboratory of Servo Motion System Drive and Control Ministry of Industry and Information Technology School of Automation Beijing Institute of Technology Beijing100081 China New Energy Laboratory College of Mechanical and Electrical Engineering Beijing Information Science and Technology University Beijing100192 China

In view of the disadvantages of Traditional tandem joint type thin-plate palletizing robots using push-down adsorption sorting, such as moving path complexity, large occupied space, joint error stack and low end control precision, a novel multi-link mechanism thin-plate palletizing robot is developed. The kinematics analysis is carried out based on the analysis of the overall structure for the manipulator, a genetic algorithm based on the stroke speed ratio K, the transmission angle γ and the four-bar size is proposed to realize the optimal design of the four-link rocker arm mechanism. Secondly, a finite element based overall structure analysis method is proposed, which obtains the most affected part of the vibration process of a manipulator and performs load verification to prevent early warning and reference of faults caused by mechanical resonance. To solve the control problem of nonlinear strongly coupled dynamic systems, an iterative learning fuzzy adaptive control algorithm is proposed to achieve the smooth running of the manipulator and the high-precision tracking of the end centroid trajectory. The experimental results verify the feasibility and effectiveness of the proposed multi-link controllable thin-plate palletizing manipulator's overall structural design and iterative learning control method, which is well applied in practical engineering. © 2020, CC BY.

关键词： Manipulators

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Enhancing Adaptive Event-Triggered Protocols for Multi-Agent Consensus with External Disturbances

Enhancing Adaptive Event-Triggered Protocols for Multi-Agent...

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International Conference on control, automation, Robotics and Vision (ICARCV)

作者： Xianwei Li Yang Tang Bing Zhu Shaoyuan Li Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai China Key Laboratory of Advanced Control and Optimization for Chemical Processes East China University of Science and Technology Shanghai China Seventh Research Division School of Automation Science and Electrical Engineering Beihang University Beijing China

ISBN: (数字)9781728177090

ISBN: (纸本)9781728177106

This paper studies the design of adaptive event-triggered protocols for consensus of linear multi-agent systems (MASs) with external disturbances. Different from most of the existing results that deal with undirected graphs, this paper addresses directed graphs, specifically graphs that are assumed to be strongly connected. Inspired by a recent development [1], this paper devises novel adaptive event-triggered protocols for linear MASs with all agents subject to external disturbances. Two specific designs of composite triggering conditions are analysed and discussed. Compared with the disturbance-free case, additional constraints need to be introduced to deal with external disturbances and moreover the time-dependent terms are allowed to take any finite functions, rather than a class of L1 functions.

关键词： Protocols Eigenvalues and eigenfunctions Laplace equations Directed graphs Symmetric matrices Closed loop systems automation

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system modeling and simulation for flap system power drive unit of commercial aircraft

System modeling and simulation for flap system power drive u...

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CSAA/IET International Conference on Aircraft Utility systems (AUS 2020)

作者： T. Liu Y. Zhang Y. Qian J. Ju W. Yu Shanghai Aircraft Design and Research Institute Department of Flight Control System China Commercial Aircraft Corporation of China Ltd. Department of Science and Technology Management China University of Waterloo Department of Mechanical and Mechatronics Engineering Canada Shanghai Jiaotong University Department of Automation School of Electronic Information and Electrical Engineering China

This paper describes the use of mathematical modelling within flap system power driving unit for commercial aircraft. The modelling process is described from the architecture of flap system, the principle and mathematical model of electrical motors and its control loop structure. The model of power driving unit and its external load system are developed in Simulink. Basic retraction and deployment function of flap has been performed, and the response of power driving unit under a typical jam failure of the actuator is provided. This work highlights the advantages of system modelling and simulation to support the load analysis of driveline components (e.g. actuators, torque shafts, etc.) within the conceptual design phase.

关键词： mechanical engineering computing control engineering computing actuators aerospace components jamming design engineering aircraft power systems machine control computer simulation

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Research on Weld Quality Detection Method Based on Machine Vision and Computer Image Processing 5

Research on Weld Quality Detection Method Based on Machine V...

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2019 5th International Conference on Applied Materials and Manufacturing Technology, ICAMMT 2019

作者： Xue, Bin Ma, Shufang Chu, Huihui Liu, Kang Jiao, Shuangben Meng, Qingsen Engineering and Technology RandD Center of Mechanical and Electrical in Colleges of Shandong Qingdao Binhai University Qingdao Shandong266555 China School of Mechanical and Electrical Engineering Qingdao Binhai University Qingdao Shandong266555 China School of Material Science and Engineering Taiyuan University of Science and Technology Taiyuan Shanxi030024 China Qingdao Zhongzhuang Vision Automation System Control Co. Ltd. Shandong266555 China

In the weld quality inspection system based on machine vision and computer image processing, according to the principle of laser triangulation, a line laser is used to project structured light on the weld surface, and the weldment moves uniformly in a straight line on the moving platform. At the same time, the CMOS camera captures the structured light image and transmits it to the industrial computer through Gigabit Ethernet. The image is denoised by the median filtering algorithm on the industrial computer, then the image is segmented by the maximum inter-class error (Otus) method, and the image is binarized according to the threshold value. Then the center of the stripe is extracted by constructing four direction templates, and the 3D model is reconstructed by curve fitting. After the completion of the image processing, the geometric size of the weld is measured by mathematical formula. After the weld seam measurement is completed, the weld seam is transversely cut off at the same position, measured by manual method, and then the data measured by the two methods are compared. Through repeated measurements and comparisons of weld width, residual height and back forming, the precision of the system meets the practical requirements. The weld forming varies with the welding parameters within a certain range, but changes little and has good stability. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Computer vision

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Artificial Neural Network Based Maximum Power Point Tracking for PV system

Artificial Neural Network Based Maximum Power Point Tracking...

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第三十八届中国控制会议

作者： Al-wesabi Ibrahim Min Ding Xiaoling Jin Xianzhong Dai Mohammad Abu Sarhan Muhammed Badeaa Shafik Hao Zhou School of Automation China University of Geoscience Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex System State Grid Energy Research Institute School of electrical engineering and automation Wuhan university

Nowadays PV systems is suffering from two main problems: high production cost and low efficiency especially under variable weather conditions. Therefore, to reduce such associated problems, PV systems are being connected with various optimization controllers such as maximum power point tracking. In this paper, an artificial neural network maximum power point method has been designed to be linked between a PV system and DC-DC buck converter, and each part of the system is fully explained. The whole system was modeled under MATLAB/Simulink environment, simulation results demonstrated the efficiency of the proposed method. The proposed method has been examined to track the maximum power point under different weather conditions which shows a rapid and accurate tracking of the maximum power point(MPP) of PV system. The whole system which consists of PV arrays, Buck converter, ANN tracker, and load has been modeled using MATLAB/Simulink environment. This Simulink model has been examined using different levels of temperature and irradiation and the output results of both P-V and I-V characteristics, output power, and the system efficiency clearly demonstrate the validation of the modeled system. This demonstration has been done by comparing between the result of experimental platform and the results of simulated model which approves that ANN is highly recommended to be used in the field of maximum power point tracking of PV system.

关键词： Artificial neural network(ANN) Photovoltaic(PV) Maximum power point tracking(MPPT) Buck converter

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system modeling and simulation for flap system power drive unit of commercial aircraft

System modeling and simulation for flap system power drive u...

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CSAA/IET International Conference on Aircraft Utility systems 2020, AUS 2020

作者： Liu, Tong Zhang, Yue Qian, Yanjun Ju, Jiachen Yu, Wenbin Department of Flight Control System Shanghai Aircraft Design and Research Institute 5188 Jinke Rd. Shanghai201210 China Department of Science and Technology Management Commercial Aircraft Corporation of China Ltd. 1919 Shibo Ave. Shanghai200126 China Department of Mechanical and Mechatronics Engineering University of Waterloo 200 University Ave. W. WaterlooONN2L 3G1 Canada Department of Automation School of Electronic Information and Electrical Engineering Shanghai Jiaotong University 800 Dongchuan Rd. Shanghai200240 China

ISBN: (纸本)9781839535635

关键词： Actuators

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Noncontact Current Source Reconstruction Based on Independent Component Analysis-A Simulation Study

Noncontact Current Source Reconstruction Based on Independen...

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2019 IEEE PES Innovative Smart Grid Technologies Asia, ISGT 2019

作者： Nyaaba, Ayambire Patrick Huang, Qi Li, Jian Pan, Siming Gao, Bin Tian, Guiyun Zhang, Shijun Xiao, Bin Sichuan Provincial Key Lab of Power System Wide-Area Measurement and Control School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu611731 China School of Automation Engineering University of Electronic Science and Technology of China Chengdu611731 China No. 9 Research Institute China Electronic Technology Group China

ISBN: (纸本)9781728135205

This paper implemented a current reconstruction system based on independent component analysis and magnetic field sensors. In this paper both the normal approximation and interfered approximation of magnetic flux density generated by current carrying conductors and sensed by four magnetic sensors are presented and discussed. The output voltage of the sensor array with and without interference was calculated based on the comprehensive independent component analysis algorithm. The relative reconstruction error based on the algorithm for array output voltage are within acceptable levels for protective devices proving the feasibility of the algorithm for source reconstruction. © 2019 IEEE.

关键词： Independent component analysis

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Online Open-Circuit Fault Detection and Location utilizing Estimated Instantaneous Amplitudes

Online Open-Circuit Fault Detection and Location utilizing E...

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Fault Detection, Supervision and Safety for Technical Processes (SAFEPROCESS), CAA Symposium on

作者： Songbing Tao Yi Chai Bowen Liu Congmei Jiang Shuiqing Xu Key Laboratory of complex system safety and control Ministry of Education College of Automation Chongqing University Chongqing China College of Electrical Engineering and Automation Hefei University of Technology Hefei China

ISBN: (数字)9781728106816

ISBN: (纸本)9781728106823

As one of the most key parts of wind power generation systems (WPGSs), the grid-connected converter plays a significant role for energy conversion. It is meaningful to ensure the stability and safety of converters in WPGSs. In this paper, a novel signal processing based approach is proposed to detect and locate power switch failures in grid-connected converters of WPGSs, which is completely different from existing current based approaches. Based on the proposed weighted sliding Hilbert transform (WSHT) algorithm, instantaneous amplitudes of the three-phase output current can be estimated online without effects of the boundary problem. At last, simulation results demonstrate the effectiveness for open-circuit faults in the grid-connected converters.

关键词： Transforms Microsoft Windows Frequency estimation Fault detection Time-frequency analysis Wind power generation Monitoring

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