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IEEE International Conference on Mechatronics and Automation

作者： Zhigang Wang Lingling Wang Zerong Yun Jinghui Wang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control Tianjin University of Technology Tianjin China National Institute of Metrology China Beijing China

Blackbody radiation source is a key equipment in the traceability process of temperature measurement. In infrared temperature measurement, stable and consistent temperature control of the blackbody radiation sources is required. And in the process of calibration, it is a key element that a blackbody radiation source can produce a fixed temperature. Effective control of its temperature is, therefore, crucial. Due to the change of parameters and the uncertainty of loads, the performance requirements for conventional Proportional, Integral and Differential (PID) controller are high. But the control effect of the conventional PID controller on the temperature control system is not perfect. So the Fuzzy-PID control algorithm is simulated with software for the temperature control system of the blackbody radiation source in this paper. Compared with the conventional PID control algorithm, the Fuzzy-PID control has advantages of quicker response, smaller overshoot and more stable performance. It is of a certain reference value to improve the temperature control performances in the actual industrial production applications.

关键词： Temperature control Temperature measurement PI control PD control Temperature sensors Cavity resonators

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Optimization of Emergency Load Shedding Following HVDC Blocking of Receiving-End Power systems Based on PSO

Optimization of Emergency Load Shedding Following HVDC Block...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Meng Liu Taoyanz Xu Fangfang Shi Yue Wu Jianjun Su Guohui Zhang Kuan Li Changgang Li Shandong Electric Power Research Institute Jinan China Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China

An emergency load shedding optimization model is proposed in this paper to solve the DC blocking fault of the multi DC receiving-end power grid. The model takes the load shedding of each node as the optimization variable and the minimum total load shedding as the optimization objective. It takes a variety of transient indicators as constraints and adopts Particle Swarm Optimization (PSO) combined with electromechanical transient simulation. The PSO algorithm is improved by adaptive parameter adjustment to improve its optimization ability. This paper improves the efficiency of the algorithm by parallel computing and verifies the feasibility of the algorithm by the provincial power grid model in China.

关键词： Libraries Optimization Load modeling Power system stability Power grids Particle swarm optimization

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An Algorithm for Quadruped Robot's Inverse Kinematic Problems Based on PSO

An Algorithm for Quadruped Robot's Inverse Kinematic Problem...

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Chinese control Conference (CCC)

作者： Wei Shen Min Li Junzheng Wang Changkun Chai Wen Zheng Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing Institute of Software Chinese Academy of Sciences Beijing Siemens China LTD Beijing

The inverse problem is an essential problem in robot kinematics. In order to deal with the inverse kinematic problems of hydraulic quadruped robot, the motion process of a single leg is modeled, simulated and analyzed. A new method based on particle swarm optimization (PSO) is proposed in this paper to overcome low computational efficiency, long calculation time and accumulative error. The proposed algorithm is attributed to: 1) limit the range of particles initialization; 2) select suitable compressibility factors; 3) employ linear interpolation method to improve the efficiency of the inverse algorithm. The simulation results demonstrate that the developed method can provide enhanced computational efficiency and significantly reduce the calculation time while ensuring the precision requirement, and can also eliminate the accumulative error.

关键词： Legged locomotion Robot kinematics Kinematics Trajectory Hip Hydraulic systems

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Flow Mechanism of Cooling Effectiveness Improvement for the Cylindrical Film Cooling Hole with Contoured Craters

Flow Mechanism of Cooling Effectiveness Improvement for the ...

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The 5th Advanced Materials,Mechanics and Structural Engineering Conference(AMMSE 2018)

作者： Linchao Bai Chao Zhang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology)

In this paper,a typical cylindrical hole with contoured craters is investigated in terms of the downstream flow field by numerical method at blowing ratios of 0.5,1 and *** flow field and the cooling effectiveness are analyzed using threedimensional Reynolds-averaged Navier-Stokes equations with the shear stress transport turbulence *** comparison to the cylindrical hole,the cratered hole shows a wider coolant coverage in lateral direction and a lower penetration into the mainstream flow due to the larger hole exit ***,the interaction between the coolant and the curved protrusion induces a new anti-kidney-shaped vortex pair,which can obviously improve the cooling coverage and thus the cooling *** areaaveraged cooling effectiveness for the cratered hole is always higher than that for the cylindrical hole at all three blowing ratios.

关键词： Flow Mechanism of Cooling Effectiveness Improvement for the Cylindrical Film Cooling Hole with Contoured Craters

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Comparison on Thermodynamic Performances Between Basic and Regenerative Sub-critical Organic Rankine Cycles Coupled with Low Grade Heat Source

Comparison on Thermodynamic Performances Between Basic and R...

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The 5th Advanced Materials,Mechanics and Structural Engineering Conference(AMMSE 2018)

作者： Pengfei Yuan Chao Zhang Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control National Demonstration Center for Experimental Mechanical and Electrical Engineering Education (Tianjin University of Technology)

The coupling effects of low grade heat source on thermodynamic performances of both the basic and regenerative sub-critical Organic Rankine cycle(ORC) systems are investigated and *** inlet pressure and turbine inlet temperature are treated as independent *** system exergy efficiency is selected as the thermodynamic performance *** low grade heat source are waste hot water with temperature range of 373.15 K to 423.15 *** studies are carried out using eight common organic working fluids to recover heat energy,and relevant operating conditions are obtained *** results indicate that both hot fluid inlet temperature and the allowable minimum hot fluid outlet temperature influence the optimal working fluid,relevant turbine inlet condition and system exergy *** system exergy efficiency increases monotonously with increasing of hot fluid temperature for both ORC *** comparison to the basic cycle configuration,optimal system exergy efficiency for the regenerative system using the same working fluid is not changed if relevant turbine inlet vapor is saturated,but is significantly improved if relevant turbine inlet vapor is ***,the optimal working fluid is dependent on the heat source temperature and specific cycle configuration.

关键词： Comparison on Thermodynamic Performances Between Basic and Regenerative Sub-critical Organic Rankine Cycles Coupled with Low Grade Heat Source Basic

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New method for stability of systems with time-varying delay via improved free-matrix-based integral inequality

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IFAC-PapersOnLine 2017年第1期50卷 1281-1285页

作者： Zhi Y.-L. He Y. Zhang C.-K. Wu M. School of Automation China University of Geosciences Hubei key Laboratory of Advanced Control Intelligent Automation for Complex Systems Wuhan 430074 China

This paper concerns the stability problem of systems with time-varying delay. A single integral of the second-order derivative is introduced to Lyapunov-Krasovskii functional for considering more delay-cross relationships. The improved free-matrix-based integral inequality is used to estimate the derivative of double integral of the second-order derivative. Some less conservative stability criteria for systems with time-varying delay are deduced in terms of linear matrix inequalities. Finally, a example is provided to demonstrate validity and superiority of the proposed method. © 2017

关键词： Improved free-matrix-based integral inequality linear matrix inequalities Lyapunov-Krasovskii functional Second-order derivative systems with time-varying delay

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Acoustic Source Tracking in Reverberant Environment Using A Novel PSO Particle Filter Framework

Acoustic Source Tracking in Reverberant Environment Using A ...

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Chinese Automation Congress (CAC)

作者： Jing Yang Xiuqin Shang Bin Hu Zhen Shen Gang Xiong Hui Wang College of Information Sciences and Technology Beijing University of Chemical Technology Beijing China State Key Laboratory for Management and Control of Complex Systems Institute of Automation Chinese Academy of Sciences Beijing China Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences Beijing China The Cloud Computing Center Chinese Academy of Sciences Dongguan China

In this paper, several methods are combined together and applied to a Particle Filter based on Particle Swarm Optimization acoustic source tracking framework in order to solve some problems of sound source tracking. The Time Difference of Arrival (TDOA), which is extracted from the audio signal received by the microphone pair, makes observations. The Langevin Model is used to describe the speaker's motion characteristics. The pseudo-likelihood function is constructed by using the Global Coherence Field (GCF) function to update the particle weight, in order to solve problem of the phenomenon of spurious source due to noise and reverberation. According to the iterative process and particle flight conditions, the inertial weights of the particles are adjusted nonlinearly and dynamically. The concepts of superior flight speed and inferior flight speed are introduced to Particle Swarm Optimization, which helps jump out of local optimum and solves the problem of lack of particle diversity. Thus, the faster tracking of sound source is realized. In the framework, with fewer particles, the robustness of tracking is enhanced and accuracy of tracking is improved. Finally, the effectiveness of this framework for acoustic source tracking is verified through several Monte Carlo simulation experiments.

关键词： Microphones Particle filters Particle swarm optimization Tracking Coherence Reverberation

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Publisher's Note: “Coupling analysis of transient aerodynamic and dynamic response of articulated heavy vehicles under crosswinds” [Phys. Fluids 34, 017106 (2022)]

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Physics of Fluids 2022年第2期34卷

作者： Qianwen Zhang (张倩文) Chuqi Su (苏楚奇) Makoto Tsubokura (坪倉誠) Zhen Hu (胡振) Yiping Wang (汪怡平) 1Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China 2Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China 3Hubei Research Center for New Energy and Intelligent Connected Vehicle Wuhan University of Technology Wuhan 430070 China 4Graduate School of System Informatics Kobe University Kobe Hyogo 657-8501 Japan 5Complex Phenomena Unified Simulation Research Team RIKEN Advanced Institute for Computational Science Kobe Hyogo 650-0047 Japan 6Shanghai Huawei Technology Co. Shanghai 201206 China

This article was originally published online on 7 January 2022 with an incorrect page number. The correct page number is 017106. All online versions of this art

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Trajectory tracking of under-actuated reentry vehicle based on time-varying SMC with RBF disturbance observer 5

Trajectory tracking of under-actuated reentry vehicle based ...

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5th International Workshop on Advanced Computational Intelligence and intelligent Informatics, IWACIII 2017

作者： Ji, Haibo Guo, Fuhui Liu, Xiangdong School of Automation State Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology Beijing100081 China

In this paper, an effective guidance scheme and a control scheme are proposed to realize trajectory tracking of hypersonic reentry vehicle(HRV) subject to aileron stuck in some position. The overload is adopted as virtual control instead of lift and lateral force, then guidance order can be obtained by torque coefficient function. In attitude subsystem, attack of angle and sideslip angle are controlled to track guidance order. Time-varying sliding mode control method is adopted to design guidance law and attitude controller. Besides, a RBF observer is designed to estimate the unknown external disturbance to soften the chattering caused by TVSMC. Simulations verify the proposed schemes.

关键词： Sliding mode control

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A Vision and Neural Network Based Air-Ground Coordinated control system

A Vision and Neural Network Based Air-Ground Coordinated Con...

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2017 IEEE International Conference on Unmanned systems (ICUS)

作者： Muyun Jiang Jiahui Shi Hongbin Ma You Li School of Automation Beijing Institute of Technology State Key Laboratory of Intelligent Control and Decision of Complex Systems Beijing Institute of Technology

ISBN: (纸本)9781538631089;9781538631072

This paper presents an air-ground coordinated system made up of an Unmanned Aerial Vehicle(UAV) and an Unmanned Ground Vehicle(UGV).The movement of UGV is totally controlled by UAV and multiple sensors are adopted in the system to ensure the stability.A novel neutral network algorithm is introduced to identify the location and orientation of *** component is introduced and tested in detail and the coordinated system performs a satisfying result.

关键词： Air-ground system Neutral Network

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