检索结果-内蒙古大学图书馆

Hybrid optimization of dynamic deployment for networked fire control system

Journal of systems Engineering and Electronics 2013年第6期24卷 954-961页

作者： Chen Chen Jie Chen Bin Xin School of Automation Beijing Institute of Technology Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education

With applying the information technology to the military field, the advantages and importance of the networked combat are more and more obvious. In order to make full use of limited battlefield resources and maximally destroy enemy targets from arbitrary angle in a limited time, the research on firepower nodes dynamic deployment becomes a key problem of command and control. Considering a variety of tactical indexes and actual constraints in air defense, a mathematical model is formulated to minimize the enemy target penetration probability. Based on characteristics of the mathematical model and demands of the deployment problems, an assistance-based algorithm is put forward which combines the artificial potential field （APF） method with a memetic algorithm. The APF method is employed to solve the constraint handling problem and generate feasible solutions. The constrained optimization problem transforms into an optimization problem of APF parameters adjustment, and the dimension of the problem is reduced greatly. The dynamic deployment is accomplished by generation and refinement of feasible solutions. The simulation results show that the proposed algorithm is effective and feasible in dynamic situation.

关键词： deployment optimization artificial potential field （APF） constraint handling generation of feasible solutions memetic algorithm

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The generator start-up sequence optimization following a blackout

The generator start-up sequence optimization following a bla...

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中国电机工程学会电力系统专业委员会2014年学术年会

作者： Hainan ZHU Yutian LIU Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University17923 Jingshi RoadJinan 250061China

After black-start(BS) generator restarts successfully during system restoration process, it is a primary task to provide cranking power to non-black-start(NBS) generators.A two-step optimal generator start-up sequence method for power system restoration is proposed in this *** step Ⅰ, the generator which is easiest to restart is selected as the first generator for safe *** step Ⅱ, a multi-objective optimization model which has a primary objective and two secondary objectives is built with consideration of the influence of restoration paths.A neighborhood is designed by the neighborhood search method to ensure the quality of solutions according to the solution of the primary ***-EDA is applied to search pareto optimal solutions in the designed *** results of a practical power system demonstrate the two-step method can take less time to determine several pareto optimal generator sequences and corresponding restoration paths and has potential to be used to guide restoration process in real time.

关键词： power system restoration two-step method generator start-up sequence neighborhood search method multi-objective optimization model

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Valuation and Allocation of Spinning Reserve Considering Power Network Constraints

Valuation and Allocation of Spinning Reserve Considering Pow...

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IEEE Power and Energy Society General Meeting

作者： Kai Wang Xiaodong Chu Wen Zhang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan P. R. China

To ensure the reliable operation of power systems, adequate reserve capacity must be allocated properly. Considering transmission constraints, reserve capacity from various nodes has different effects on the system reliability. Spinning reserve is procured in this paper responding to the imbalance between load and generation, which influences system reliability level described by the value of lost load (VOLL). The reserve value is derived through VOLL. From the perspective of demand and supply equilibrium, a reasonable decision can be made for spinning reserve allocation at each node. Simulation results demonstrate the effectiveness of the proposed scheme.

关键词： Hafnium

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Mechanism analysis and simulation of coplanar multi-electrode capacitive ice thickness measuring sensor

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Sensors and transducers 2013年第11期158卷 27-32页

作者： Yinke, Dou Xiaomin, Chang College Electric and Power Engineering of Taiyuan University of Technology 030024 Tai Yuan China Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education Taiyuan 030024 China

In this paper, we use the coplanar multi-electrode for designing a rod-shaped sensor for measuring the ice thickness. In order to analyze and study mechanism and feasibility of ice thickness measurements using this technique, we use modes of mathematical model derivation and software simulation to study coplanar multielectrode capacitance sensors. It uses MAXWELL software to simulate the coplanar multi-electrode capacitance sensor under the models which are being approached by three different media, namely ice, air and water. Both mathematical model derivation and simulation results show that the sensor designed with coplanar multielectrode capacitance can be used to level the automated measurement of sea ice or river ice thickness. The accuracy is ± 1 cm. © 2013 by IFSA.

关键词： Thickness measurement

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Simultaneous Excitation and Emission Enhancements in Upconversion Luminescence Using plasmonic Double-resonant Gold Nanorods

Simultaneous Excitation and Emission Enhancements in Upconve...

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第三届等离激元光子学前沿国际会议

作者： Xin Liu Dangyuan Lei Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education and College of Physics and Optoelectronics Taiyuan University of Technology Department of Applied Physics The Hong Kong Polytechnic University Shenzhen Research Institute The Hong Kong Polytechnic University

＜正＞Enhancing the quantum efficiency of lanthanide-doped upconversion nanocrystals is crucial for applying them in fluorescence imaging,biosensing and optoelectronic applications[1,2].Here we demonstrate numerically...

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Stability control for biped walking based on phase modification during double support period

Stability control for biped walking based on phase modificat...

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IEEE International Conference on Robotics and Biomimetics

作者： Tongtong Li Zhangguo Yu Juan Chen Yan Liu Maoxing Zheng Libo Meng Gan Ma Wen Zhang Weimin Zhang Qiang Huang Ministry of Education The Key Laboratory of Intelligent Control and Decision of Complex System Beijing China North Navigation Control Technology Co. Ltd. China

ISBN: (纸本)9781479973989

This paper presents a control strategy based on phase modification during double support period to enhance a humanoid robot's walking stability. When the foot of the swing leg touches the ground, if Zero Moment Point(ZMP) is not in the stable margin, the phase modification will start. According to the position of ZMP and the relationship between the motion of Center of Gravity(COG) and ZMP position, the related parameters are solved. Series of experiments are taken, and the effectiveness of the method is validated repeatedly.

关键词： Legged locomotion Foot Stability analysis Planning Humanoid robots Robot kinematics

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Distributed differential evolution algorithm with adaptive parameters

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Kongzhi yu Juece/control and Decision 2014年第4期29卷 701-706页

作者： Zhang, Chun-Mei Chen, Jie Xin, Bin School of Automation Ministry of Education Beijing Institute of Technology Beijing 100081 China Key Laboratory of Complex System Intelligent Control and Decision Ministry of Education Beijing Institute of Technology Beijing 100081 China School of Electronic Information Engineering Taiyuan University of Science and Technology Taiyuan 030024 China

An adaptive distributed differential evolution algorithm is proposed based on the change of the individual's fitness value. Firstly, the initial population is divided into several subpopulations. When the migration condition is satisfied, the best individual in each subpopulation will replace the worst individual of its neighbor subpopulations according to the Von Neumann topology. The migration mechanism among subpopulations enables the information to be communicated in the whole population. Meanwhile, the adaptive mechanism of F and CR is presented for assigning different F and CR to each individual according to the individual's fitness. Numerical results show that, the proposed algorithm is beneficial to explore the solution space, which can avoid the premature convergence and search the excellent solutions.

关键词： Optimization

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Slip prevention of a humanoid robot by coordinating acceleration vector

Slip prevention of a humanoid robot by coordinating accelera...

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International Conference on Information and Automation (ICIA)

作者： Zhangguo Yu Jing Li Qiang Huang Xuechao Chen Gan Ma Libo Meng Si Zhang Yan Liu Wen Zhang Weimin Zhang Xiaopeng Chen Junyao Gao Key Laboratory of Biomimetic Robots and Systems Ministry of Education Beijing China Intelligent Robotics Institute Beijing Institute of Technology Beijing China Key Laboratory of Intelligent Control and Decision of Complex System Beijing China

A humanoid robot may suffer from slip since its two feet are not fixed on the ground. Slip occurrence may induce the loss of robot's balance. The previous literature focused on the detection or estimation of the slip occurrence, or only employed the translational acceleration regulation to overcome slip. This study proposes a slip prevention method by coordinating acceleration vector including the horizontal, vertical, and rotational acceleration components. The contribution of this paper is to regulate the translational and rotational acceleration together to prevent the slip occurrence. The effectiveness of our proposed method was verified by simulations and experiments on an actual humanoid robot.

关键词： Acceleration Robot kinematics Vectors Humanoid robots Mathematical model Equations

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Open Architecture and Its Implementation of Power system Numerical Simulation Software

Open Architecture and Its Implementation of Power System Num...

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2014 International Conference on Artificial,Intelligence and Software Engineering(AISE 2014)

作者： Wen-xin LYU Xin-huan JIANG Qun XU Heng-xu ZHANG Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Qingdao Power Company Shandong State Grid Corporation of China

An open architecture of power system numerical simulation software is proposed, the interface information between simulation engine and user program is exchanged by Client/Server implementation. The open application program interface is realized by establishing an identical and standardized database(a normalized function interface table) on both sides so that they can understand each other through table searching. The client-side secondary development is not limited to single programming language. Interface software packages have been developed for different programming languages including C++, Matlab and Python. It is verified that the proposed framework has powerful openness as well as flexibility, which will greatly improve the calculating and analyzing capabilities of the power system numerical simulation software.

关键词： Power system Numerical simulation Application program interface(API) Open architecture

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Coordinated obstacle avoidance with reduced interaction

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Neurocomputing 2014年 139卷 233-245页

作者： Jiaojie Li Wei Zhang Housheng Su Yupu Yang Hongtao Zhou Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 China Department of Measurement and Control Technology Shanghai Dian Ji University Shanghai 200240 China School of Automation Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology Luoyu Road 1037 Wuhan 430074 China

In this paper, we study the coordinated obstacle avoidance algorithm of multi-agent systems when only a subset of agents has obstacle dynamic information, or every agent has local interaction. Each agent can get partial measuring states information from its neighboring agent and obstacle. Coordinated obstacle avoidance here represents not only the agents moving without collision with an obstacle, but also the agents bypassing and assembling at the opposite side of the obstacle collectively, where the opposite side is defined according to the initial relative position of the agents to the obstacle. We focus on the collective obstacle avoidance algorithms for both agents with first-order kinematics and agents with second-order dynamics. In the situation where only a fixed fraction of agents can sense obstacle information for agents with first-order kinematics, we propose a collective obstacle avoidance algorithm without velocity measurements. And then we extend the algorithm to the case in switched topology. We show that all agents can bypass an obstacle and converge together, and then assemble at the opposite side of the obstacle in finite time, if the agents׳ topology graph is connected and at least one agent can sense the obstacle. In the case where obstacle information is available to only a fixed fraction of agents with second-order kinematics, we propose two collective obstacle avoidance algorithms without measuring acceleration when the obstacle has varying velocity and constant velocity. The switched topology is considered and extended next. We show that agents can bypass the obstacle with their positions and velocities approaching consensus in finite time if the connectivity of switched topology is continuously maintained. Several simulation examples demonstrate the proposed algorithms.

关键词： Obstacle avoidance Consensus Reduced interaction Circular motion Multi-agents

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