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2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control最新文献

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The Analysis of Sewers Inflammable Gas Based on PSO-SVR 基于PSO-SVR的下水道可燃气体分析
Wang Hong-qi, Cheng Xin-wen, Jiang Hua-long
Due to the non-liner, poor selectivity and cross-sensitivity of the combustible gas in the sewer, an analysis prediction model of the combustible gas in the sewer has been established based on the PSO-SVR machine, the model has introduced a new particle swarm algorithm to support the vector regression machine so that it can optimize the important parameters, realizing the automatic determination of parameters of the SVR machine, and be used for quantitative analysis of combustible gas in the sewer. The simulation results show that the model of the combustible gas in the sewer based on PSO-SVR machine is superior to the compared SVR model and it has better generalization performance and higher prediction accuracy.
针对下水道可燃气体的非线性、选择性和交叉灵敏度较差的特点,建立了基于PSO-SVR机的下水道可燃气体分析预测模型,该模型引入了新的粒子群算法来支持向量回归机对重要参数进行优化,实现了SVR机参数的自动确定。并用于下水道可燃气体的定量分析。仿真结果表明,基于PSO-SVR机的下水道可燃气体模型优于与之比较的SVR模型,具有更好的泛化性能和更高的预测精度。
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引用次数: 0
Adaptive Tracking Control of Hypersonic Re-entry Vehicle with Uncertain Parameters 参数不确定的高超声速再入飞行器自适应跟踪控制
Chen Bai, Chengbin Lian, Z. Ren, Yao Fan, P. Qi
The problem of hypersonic re-entry vehicle attitude control with uncertain parameters is addressed. Aimed at a class of affine nonlinear system, adaptive control with observer is proposed. It is proved that observer error of uncertain parameters and tracking error of system output can uniformly asymptotically converge to zero. For implementation on hypersonic re-entry vehicle, two-loop attitude control is designed with aerodynamic derivatives considered as uncertain parameters. Simulations on 6DOF model of HRV show that the proposed adaptive control can keep good tracking performance in case of uncertain parameters.
研究了具有不确定参数的高超声速再入飞行器姿态控制问题。针对一类仿射非线性系统,提出了带观测器的自适应控制方法。证明了不确定参数观测器误差和系统输出跟踪误差能一致渐近收敛于零。为实现高超声速再入飞行器的姿态控制,设计了考虑气动导数为不确定参数的双环姿态控制。对HRV六自由度模型的仿真表明,所提出的自适应控制在参数不确定的情况下仍能保持良好的跟踪性能。
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引用次数: 0
Ant Colony Algorithm and Its Application in Solving the Traveling Salesman Problem 蚁群算法及其在旅行商问题中的应用
Shi-gang Cui, Shaolong Han
With the modernization of the rapid development of science and technology, high technology has been more and more widely applied. Ant colony algorithm is a novel category of bionic meta-heuristic system and parallel computation and positive feedback mechanism are adopted in this algorithm. Ant colony algorithm, which has strong robustness and is easy to combine with other methods in optimization, has wide application in various combined optimization fields, but the basic ant colony algorithm is of slow convergence and easy to stagnation and easily converges to local solutions. many scholars did a lot of effort to improve these weaknesses, but the research still needs improving. This paper expounds the basic principle, model, advantages and disadvantages of ant colony algorithm and the TSP problem, the concrete realization process of ant colony algorithm is put forward in solving traveling salesman problem and the simulation shows that solution is feasible.
随着现代化科学技术的飞速发展,高新技术得到了越来越广泛的应用。蚁群算法是仿生元启发式系统的一个新范畴,该算法采用并行计算和正反馈机制。蚁群算法具有较强的鲁棒性和易于与其他优化方法结合的特点,在各种组合优化领域得到了广泛的应用,但基本蚁群算法收敛速度慢,容易停滞,容易收敛到局部解。许多学者做了大量的努力来改善这些弱点,但研究仍有待改进。阐述了蚁群算法和TSP问题的基本原理、模型、优缺点,提出了蚁群算法在求解旅行商问题中的具体实现过程,并通过仿真验证了算法的可行性。
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引用次数: 4
Optimal Dispatch Considering the Ability of Active Power Control of Wind Farms 考虑风电场有功控制能力的最优调度
Wei Wang, Guogang Jin, Ying Wang, Yanping Xu, Kaifeng Zhang
Wind power plants have ability to control the wind power output within a certain range. Considering the ability of active power control of wind farms, the wind power forecast will be more accurate. In this paper, a statistical model for wind power forecast distribution considering the wind farm active control is established. Then, based on the wind forecast error model proposed, an optimal dispatch model is formulated. An improved particle swarm optimization (PSO) algorithm is proposed to solve this problem. The case study shows that considering the ability of wind power control, the reserve requirement will be reduced and the operation cost will be decreased.
风力发电厂具有将风力输出控制在一定范围内的能力。考虑到风电场的有功控制能力,风电预测将更加准确。本文建立了考虑风电场主动控制的风电功率预测分布统计模型。然后,根据提出的风预报误差模型,建立了最优调度模型。针对这一问题,提出了一种改进的粒子群优化算法(PSO)。实例分析表明,考虑风电控制能力,可以降低备用需求,降低运行成本。
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引用次数: 0
Cabin Temperature Control System Simulation of Transportation Aircraft 运输飞机客舱温度控制系统仿真
Zhang Jian, Hao Guihe, Zhanglong Jing
Temperature control system of aircraft cabin is a large time-constant, nonlinear and time-varying complex system, and the accurate mathematical model of the controlled object is hard to establish. So it is difficult to achieve satisfying control effect by means of the traditional temperature control method. According to this situation, a new approach of cabin temperature control is proposed in this paper. A fuzzy controller is designed on the basis of the original temperature control system to realize cabin temperature compensation control. Simulation results show that the system with the fuzzy controller has better dynamic-response characteristics, comparing with the system using traditional control methods. The new cabin temperature control system has characteristics of smaller overshoot, fast transient time, and higher control accuracy in its controlling process.
飞机客舱温度控制系统是一个大时常数、非线性、时变的复杂系统,被控对象的精确数学模型难以建立。因此,采用传统的温度控制方法很难达到令人满意的控制效果。针对这种情况,本文提出了一种新的客舱温度控制方法。在原有温度控制系统的基础上设计了模糊控制器,实现了座舱温度补偿控制。仿真结果表明,与采用传统控制方法的系统相比,采用模糊控制器的系统具有更好的动态响应特性。该系统在控制过程中具有超调量小、瞬态时间快、控制精度高等特点。
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引用次数: 8
The BIM in Green Architectural Design Software Investigation BIM在绿色建筑设计软件研究中的应用
Peng Zhang, Xiao-xia Ma, Jingjin Zhong
It discussed the problems existed in the current green architectuarl design software combining with the architectural design process and green building evaluation standards in this paper. The architecture of constructing system frame for green architectural design software are analyzed. We put forward that BIM technology is an affective method to keep data consistent, data unique and to share resources in green architectural design software. The functions of building information model and corresponding data content in different stage of a building life cycle are discussed according to the green building evaluation standard. The concept of extended BIM are put forward through the analysis of BIM used in energy simulation software. The resaerch on BIM should be pay more attention.
本文结合建筑设计流程和绿色建筑评价标准,探讨了当前绿色建筑设计软件存在的问题。分析了构建绿色建筑设计软件系统框架的体系结构。我们提出BIM技术是绿色建筑设计软件中保持数据一致性、数据唯一性和资源共享的有效方法。根据绿色建筑评价标准,探讨了建筑信息模型在建筑生命周期不同阶段的功能和相应的数据内容。通过对BIM在能源仿真软件中的应用分析,提出了扩展BIM的概念。BIM的研究值得重视。
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引用次数: 0
Dynamic Large Terrain Rendering Algorithm in Aircraft Simulation Based on the ROAM Algorithm 基于ROAM算法的飞机仿真动态大地形绘制算法
Tian Feng, Du Rixu, Sun Fengqin, Feng Zhulei
According to the characteristics of aircraft simulation, we have designed a dynamic terrain rendering algorithm in aircraft simulation based on the ROAM algorithm. The algorithm uses three-level-simplify strategy. First, choose the level of the blocks according to different height between the viewpoint and the terrain blocks. Then tailor the terrain blocks on the level. Finally, perform simplification on the blocks we selected with the traditional ROAM algorithm to build the triangular grid.
根据飞机仿真的特点,我们设计了一种基于ROAM算法的飞机仿真动态地形绘制算法。该算法采用三级简化策略。首先,根据视点与地形块之间的不同高度选择块的水平。然后在关卡中裁剪地形块。最后,对传统ROAM算法选择的块进行简化,构建三角网格。
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引用次数: 0
Design of Polysilicon Nano-film Pressure Sensitive Chip Structure 多晶硅纳米膜压敏芯片结构设计
Chuai Rongyan, Wang Jian, Zhao Hao, Y. Lijian, D. Quan
In order to effectively applied mechanical properties of polysilicon and piezoresistive properties of polysilicon Nano-films to pressure sensors, the sacrificial layer pressure sensor with polysilicon Nano-film piezoresistors and polysilicon diaphragm is designed and developed. The sensor structure is designed by finite element software. The cavity height is determined for overload protection. The sensor samples are developed by design structure. The samples test results show that: span is 0~2.5MPa, working temperature range is -40~200°C, full-scale output voltage is 362mV, hysteresis is 0.2%, repeatability is 0.16%, nonlinear is 0.13%, thermal zero drift is 0.01% FS/°C, thermal sensitivity drift is 0.1% FS/°C and overload capacity is more than 10MPa. A feasible way is provided for the development of high sensitivity, low temperature drift, low cost and integrated pressure sensor.
为了有效地将多晶硅的力学性能和多晶硅纳米膜的压阻性能应用于压力传感器,设计开发了多晶硅纳米膜压阻和多晶硅膜片的牺牲层压力传感器。利用有限元软件对传感器结构进行了设计。空腔高度是为过载保护而确定的。通过结构设计开发了传感器样品。样品试验结果表明:量程为0~2.5MPa,工作温度范围为-40~200℃,满量程输出电压362mV,迟滞0.2%,重复性0.16%,非线性0.13%,热零漂移0.01% FS/°C,热敏漂移0.1% FS/°C,过载能力大于10MPa。为研制高灵敏度、低温度漂移、低成本的一体化压力传感器提供了一条可行的途径。
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引用次数: 0
The Moving Vehicle Detection and Tracking System Based on Video Image 基于视频图像的移动车辆检测与跟踪系统
Huang Huijie, Xu Chao, Zhao Jun, G. Wenjun
With the rapid development of motorized transportation, intelligent transportation systems have become increasingly important. Intelligent video surveillance system, as an important part of intelligent transportation subsystem, usually used in some important transportation regional, monitoring a certain period through a fixed camera. It is with great importance to achieve detection and real-time tracking of vehicles in video sequence. This paper focuses on studying the methods of the moving vehicles detection and tracking in traffic scene, considering the impact of shadow in video image, illumination changes and vehicles partially occluded.
随着机动交通的快速发展,智能交通系统变得越来越重要。智能视频监控系统作为智能交通子系统的重要组成部分,通常应用于一些重要的交通区域,通过固定摄像机对某一时间段进行监控。实现视频序列中车辆的检测和实时跟踪具有重要意义。本文重点研究了交通场景中运动车辆的检测与跟踪方法,考虑了视频图像中阴影、光照变化和车辆部分遮挡的影响。
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引用次数: 5
Study of Iterative Guidance Mode for Lunar Ascent 月球上升迭代制导模式研究
Wangwang Liu, Shengying Zhu, Weiren Wu, Zhe Zhang
Lunar ascent guidance is one of the key points for future lunar sample return and manned missions. This paper discusses the practicability of using iterative guidance mode for lunar ascent. The lunar ascent in this paper begins with a vertical rise followed by a single axis rotation and then a guided phase. The three-dimensional equations of motion for lunar ascent are derived over a flat moon with a uniform gravity field to extract the optimal control problem. Then the iterative guidance mode is deduced and extended for ascent over a spherical moon. Simulation results show that this guidance scheme satisfies all the final conditions with high accuracy. It is a feasible and effective guidance law for lunar ascent which merits consideration for actual application.
月球上升制导是未来月球样本返回和载人航天任务的关键之一。讨论了采用迭代制导方式进行月球上升的可行性。本文中的月球上升从垂直上升开始,然后是单轴旋转,然后是引导阶段。在均匀重力场条件下,推导了月球上升的三维运动方程,求解了最优控制问题。在此基础上,推导并推广了球面卫星上升的迭代制导模式。仿真结果表明,该制导方案满足所有最终条件,具有较高的制导精度。这是一种可行有效的登月制导律,值得在实际应用中加以考虑。
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引用次数: 3
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2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control
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