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2010 5th IEEE Conference on Industrial Electronics and Applications最新文献

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Implementation of a colorful RGB-LED light source with an 8-bit microcontroller 用8位微控制器实现一个彩色RGB-LED光源
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5515525
Yueh-Ru Yang
This paper depicts the implementation of a colorful RGB-LED light source with an 8-bit microcontroller. The microcontroller regulates LED light output with pulse-width modulation current and changes the light color with the current ratios of red, green and blue LEDs. While the LED light output varies with temperature, the microcontroller stabilizes the light output of LED with feed-forward compensation and reduces the color deviation in chromaticity diagram. The color deviation is measured with a miniature spectrometer and the calibration of white balance is executed based on the chromaticity coordinates of the used red, green and blue LEDs. Some color points inside the chromaticity diagram and along the blackbody locus are tested to verify the performance of the RGB LED light source. Test results show that an 8-bit microcontroller may effectively regulate the light colors and brightness of a RGB combinational light source. The implemented RGB LED light source can be a good light fixture for mood lighting in somewhere, such as, hotels, restaurants, hospitals, advertisement walls and others.
本文描述了用8位微控制器实现彩色RGB-LED光源。单片机以脉宽调制电流调节LED光输出,并根据红、绿、蓝LED的电流比改变光的颜色。当LED的光输出随温度变化时,单片机通过前馈补偿稳定LED的光输出,减少色度图中的颜色偏差。用微型光谱仪测量了色差,并根据所用红、绿、蓝led的色度坐标进行了白平衡标定。对色度图内部和黑体轨迹上的一些色点进行了测试,以验证RGB LED光源的性能。测试结果表明,一个8位微控制器可以有效地调节RGB组合光源的光色和亮度。实现的RGB LED光源可以作为一个很好的灯具,用于某些地方的情绪照明,如酒店,餐馆,医院,广告墙等。
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引用次数: 15
Multiple-model predictive control based on fuzzy adaptive weights and its application to main-steam temperature in power plant 基于模糊自适应权值的多模型预测控制及其在电厂主汽温中的应用
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5516996
Hou Guolian, Zhang Jinfang, Liu Junjun, Z. Jianhua
In order to solve the uncertainty and time-varying problems of the complex process during variable operations, a novel multiple-model predictive control system based on fuzzy adaptive weighted is investigated in this paper. Firstly, based on the model-set selecting method for multiple model adaptive control, this system preserves the performance of multiple-model approximating nonlinear property of controlled plant at close quarters, therefore the control system is robust. Secondly, fuzzy adaptive weighted control algorithm is proposed to overcome the output disturbance that caused by model switching. The weighted values are obtained by fuzzy decision-making. In this way the corresponding controller can be switched smoothly when the model is selected through switching. Thirdly, because the output predictive value of practical controlled plant is calculated by weighted average of respective sub-models output probabilities, it can rapidly image the variation of plant characteristic. Meanwhile, the output value of controller is optimized by dynamic matrix control algorithm, so the system has better dynamic performance. Furthermore, because of the convenient design and good real-time performance, this algorithm is of great significance and practical engineering value. This algorithm is applied to the main-steam temperature of a supercritical 600MW Once-through boiler; simulation experiments demonstrate the feasibility and good performance of the proposed approach compared to the former approaches.
为了解决复杂过程在变工况下的不确定性和时变问题,研究了一种基于模糊自适应加权的多模型预测控制系统。首先,基于多模型自适应控制的模型集选择方法,该系统保留了被控对象近距离多模型逼近非线性特性的性能,具有鲁棒性;其次,提出了模糊自适应加权控制算法,克服了模型切换引起的输出扰动。通过模糊决策得到权重值。这样在通过切换选择模型时,可以顺利切换相应的控制器。第三,由于实际被控对象的输出预测值是通过各子模型输出概率的加权平均来计算的,因此可以快速地反映被控对象特性的变化。同时,采用动态矩阵控制算法对控制器的输出值进行优化,使系统具有较好的动态性能。该算法设计方便,实时性好,具有重要的工程意义和实用价值。将该算法应用于某超临界600MW直通式锅炉主汽温度计算;仿真实验证明了该方法的可行性和良好的性能。
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引用次数: 9
Study on treated wastewater from power plant as circulating supplementary water 电厂废水处理后作为循环补充水的研究
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5515654
S. Liu, GuoHua Shi, Xutao Zhang
The water consumed by power plants is about half of the total annual industrial water consumption in China. Considering some characteristics of wastewater in power plants, the paper presented a new process to treat the wastewater. In the process, wastewater was made centralized treatment utilizing activated sludge firstly, then water purifying agent was put into the wastewater and they were coagulation sedimentation. The wastewater was treated by aeration and disinfection at last. In order to increase the efficiency, the ash conveying water was used as the cogulating aid in the process. The experimental results showed that the presented process was effective. The quality of the wastewater after treated was stabile and the ash conveying water was beneficial to the flocculation promotion. The effluent was well used for the circulating cooling water system. It can be concluded that the wastewater of power plants can be the supplementary water of the circulating cooling water system after appropriate treatment. The engineering practice indicated that the process can reveal the social, economical and environmental benefits and be helpful to the realization of the zero discharge of the power plants.
在中国,发电厂消耗的水约占每年工业总用水量的一半。针对电厂废水的特点,提出了一种处理电厂废水的新工艺。该工艺首先利用活性污泥对废水进行集中处理,然后在废水中加入净水剂,进行混凝沉淀。最后对废水进行曝气和消毒处理。为提高工艺效率,采用输灰水作为混凝剂。实验结果表明,该方法是有效的。处理后的废水水质稳定,输灰水有利于絮凝促进。废水很好地用于循环冷却水系统。可以得出,电厂废水经过适当处理后,可以作为循环冷却水系统的补充水。工程实践表明,该工艺具有良好的社会效益、经济效益和环境效益,有利于电厂实现零排放。
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引用次数: 0
Optimization of conventional power system stabilizer to improve dynamic stability 对常规电力系统稳定器进行优化,提高系统动态稳定性
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5517048
M. O. Hassan, S. Cheng, Z. Zakaria
In this paper, conventional power system stabilizer (CPSS) is designed to damp electromechanical oscillations. CPSS parameters settings are computed using linear control theory. A new technique based on Genetic Algorithms (GAs) is proposed to optimize the parameters settings of CPSS. The problem is formulated as an optimization problem, the objective is to compute the optimal parameters settings such that damping ratio maximized to predetermined value. The performance and robustness of optimized PSS (OPSS) is then, tested on multi-machine system and compared with CPSS. Simulation results show the effectiveness and robustness of the proposed OPSS over CPSS.
本文设计了常规电力系统稳定器来抑制电力系统的机电振荡。CPSS参数设置采用线性控制理论计算。提出了一种基于遗传算法的CPSS参数设置优化方法。将该问题表述为优化问题,其目标是计算使阻尼比达到预定值的最优参数设置。在多机系统上对优化后的PSS (OPSS)进行了性能和鲁棒性测试,并与CPSS进行了比较。仿真结果表明了该方法的有效性和鲁棒性。
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引用次数: 13
Research on the controller and human-computer interface for the voltage disturbance device 电压干扰装置控制器及人机界面的研究
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5514993
Shuhong Kong, Z. Yin
How to solve power quality problems is a research focus recently. It's of great significance to research and design the voltage disturbance device for the voltage compensation device's development and various experimental verifications. The all-digital controller is based on DSP and FPGA. The human-computer interface is designed by LabVIEW, a graphical software development environment most widely used in test, control and design fields currently. LabVIEW program runs on IPC and VISA technology is applied to realize the serial communication with DSP to control the device operation. Menu-driven interface is designed according to a novel design pattern combined with the state machine and the event structure. Based on the data signal processing technology and flexible graphical panel interface of LabVIEW's advantages, voltage disturbance experiments such as the voltage sag and swell, over voltage and under voltage, voltage fluctuation and flicker, voltage unbalance, harmonic and complex disturbances are carried out. In this paper, the working principle and design procedure of human-computer interface are researched. The verification tests are carried out to explain the functions. It's a successful application case of LabVIEW.
如何解决电能质量问题是近年来的研究热点。研究和设计电压扰动装置对电压补偿装置的研制和各种实验验证具有重要意义。基于DSP和FPGA的全数字控制器。人机界面采用LabVIEW设计,LabVIEW是目前在测试、控制和设计领域应用最广泛的图形化软件开发环境。LabVIEW程序在工控机上运行,采用VISA技术实现与DSP的串行通信,控制设备运行。菜单驱动接口是根据状态机和事件结构相结合的新颖设计模式设计的。基于LabVIEW数据信号处理技术和灵活的图形面板界面的优点,进行了电压跌落与膨胀、过压与欠压、电压波动与闪烁、电压不平衡、谐波与复杂扰动等电压扰动实验。本文研究了人机界面的工作原理和设计过程。进行了验证测试,以说明其功能。这是LabVIEW的一个成功应用案例。
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引用次数: 0
A novel power weighted synchronous control method for parallel inverters 一种新型功率加权并联逆变器同步控制方法
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5514880
W. Shuang, Ma Yundong, Wang Junqi, Jing XiaoLan
For parallel inverters, the sinusoidal output ac voltages in the same-phase should be ensured. This paper presents a power weighted synchronous control method, which is suitable for parallel inverters of different power capabilities. The key concept of the proposed strategy is that the sinusoidal reference signal is decided by the common synchronous pulse signal, which is determined by the majority of the inverters, and the power weighting factor is taken into account. By doing so, the sinusoidal reference signal cannot be interrupted even though one of the modules is fault or dropout. Firstly, the operation principle is described by comparing the conventional method and the proposed method in this paper. Secondly, the hardware implementation is given. Then a detailed reliability failure analysis of synchronous regulation is presented, which shows that higher precision of the control system is obtained compared with the existing methods. At last, the experimental results prove that the control strategy can be well achieved by the designed circuit, and the synchronization of each module is realized.
对于并联逆变器,应保证输出的正弦交流电压在同一相位。本文提出了一种功率加权同步控制方法,适用于不同功率容量的并联逆变器。提出的策略的关键概念是正弦参考信号由大多数逆变器确定的公共同步脉冲信号决定,并考虑功率加权因素。通过这样做,即使其中一个模块出现故障或丢失,正弦参考信号也不会中断。首先,通过对传统方法和本文提出的方法的比较,阐述了该方法的工作原理。其次,给出了硬件实现。然后对同步调节的可靠性失效进行了详细的分析,结果表明,与现有方法相比,该方法获得了更高的控制精度。最后,实验结果证明了所设计的电路能够很好地实现控制策略,并实现了各模块的同步。
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引用次数: 0
Dynamic threshold based keyframe detection 基于关键帧检测的动态阈值
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5516644
W. Yao, S. Rahardja
This paper proposes a simple dynamic threshold based method to detect abrupt scene changes for the coding of a video sequence. The detected frames are then encoded as keyframes aiming at improving the coding efficiency of the video sequence. The proposed detection method first replies on the number of INTRA macroblocks that are available during encoding process. The dynamic threshold, which is updated at the frame level, not only utilizes the statistical properties of video sequence but also takes the resolution and QP value into consideration. The detection process is fast and robust. Experimental results show that the proposed method achieves PSNR improvement.
本文提出了一种简单的基于动态阈值的视频序列编码中场景突变检测方法。然后将检测到的帧编码为关键帧,以提高视频序列的编码效率。所提出的检测方法首先对编码过程中可用的INTRA宏块的数量进行应答。动态门限在帧级更新,既利用了视频序列的统计特性,又考虑了分辨率和QP值。检测过程快速,鲁棒性好。实验结果表明,该方法能有效地提高PSNR。
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引用次数: 3
Improving the efficiency of mixed-structure charge pumps by the multi-phase technique 利用多相技术提高混合结构电荷泵的效率
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5516888
N. Huang, M. Shiau, Z. Hsieh, Hong-Chong Wu, Don-Gey Liu
In this paper, a new design for efficiency enhance switching-capacitor DC-DC voltage converter based on combination of traditional charge-transfer-switch charge pump and cross-coupled output stage. In order to get a high output power and pump-efficiency. By using multi-phase technique, its can increase both of pump-efficiency and power-efficiency. The propose multi-phase mixed-structure charge pump can operate at 1 MHz switching-frequency on the 0.1µF pump-capacitors. After the simulation by using HSPICE 0.35µm TSMC process, our work can converter the input low DC-voltage (VDD=1.5V) up near to 5 times of it (VOUT= 7.4688), the pump-efficiency can reaches to 99.58%, and the output power can be increased. The new proposed charge pump circuit is suitable for low-voltage applications in CMOS process because there is no threshold voltage drop in every stage even at the output stage. A great achievement has been obtained.
本文将传统的电荷转移开关电荷泵与交叉耦合输出级相结合,设计了一种新的提高效率的开关电容DC-DC电压变换器。以获得较高的输出功率和泵效率。采用多相技术,既能提高泵效率,又能提高功率效率。所提出的多相混合结构电荷泵可以在0.1µF的泵电容器上以1 MHz的开关频率工作。采用HSPICE 0.35µm TSMC工艺进行仿真后,我们的工作可以将输入低直流电压(VDD=1.5V)转换为其(VOUT= 7.4688)的近5倍,泵浦效率达到99.58%,输出功率得到提高。新提出的电荷泵电路适用于CMOS工艺中的低压应用,因为即使在输出级,每个级也没有阈值电压降。取得了巨大的成就。
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引用次数: 13
Efficiency optimal control in braking process for linear metro 线性地铁制动过程效率优化控制
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5514897
Jianqiang Liu, X. You, T. Zheng
In this paper, a new approach is proposed that increases the power efficiency in braking process for linear induction motor (LIM) drive. Based on the steady-state performance equations of the LIM, the establishment of equations to quantify the power loss in braking process can be deduced. In order to reduce the pump promotes voltage in regenerative braking and decrease the energy loss of linear metro system at the same time, a complex braking control algorithm based on regenerative braking and DC energy-consuming braking, combined with vector control strategy to drive the LIM, is proposed. This algorithm allows the pump promotes voltage in braking process of LIM drive to be restrained without braking resistor while keeping a good dynamic response. The simulated results presented show the validity of the proposed complex braking control method.
本文提出了一种提高直线感应电动机制动过程功率效率的新方法。基于LIM的稳态性能方程,可以推导出量化制动过程功率损失的方程的建立。为了降低再生制动时的泵升电压,同时降低线性地铁系统的能量损失,提出了一种基于再生制动和直流耗能制动的复合制动控制算法,并结合矢量控制策略驱动LIM。该算法可以在不需要制动电阻的情况下对LIM驱动制动过程中的泵升电压进行抑制,同时保持良好的动态响应。仿真结果表明了所提出的复杂制动控制方法的有效性。
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引用次数: 2
Multi-swarm particle swarm optimization based on mixed search behavior 基于混合搜索行为的多群粒子群优化
Pub Date : 2010-06-15 DOI: 10.1109/ICIEA.2010.5517044
Jing Jie, Wanliang Wang, Chunsheng Liu, Beiping Hou
The paper develops a Multi-swarm particle swarm optimization (MPSO) to overcome the premature convergence problem. MPSO takes advantage of multiple sub-swarms with mixed search behavior to maintain the swarm diversity, and introduces cooperative mechanism to prompt the information exchange among sub-swarms. Moreover, MPSO adopts an adaptive reinitializing strategy guided by swarm diversity, which can contribute to the global convergence of the algorithm. Through the mixed local search behavior modes, the cooperative search and the reinitializing strategy guided by swarm diversity, MPSO can maintain appropriate diversity and keep the balance of local search and global search validly. The proposed MPSO was applied to some well-known benchmarks. The experimental results show MPSO is a robust global optimization technique for the complex multimodal functions.
本文提出了一种多群粒子群优化算法来克服早熟收敛问题。MPSO利用具有混合搜索行为的多子群来保持群体多样性,并引入合作机制来促进子群之间的信息交换。此外,MPSO采用了一种以群体多样性为指导的自适应再初始化策略,有利于算法的全局收敛。通过混合局部搜索行为模式、协同搜索和基于群体多样性的再初始化策略,MPSO能够保持适当的多样性,有效地保持局部搜索和全局搜索的平衡。建议的MPSO已应用于一些知名基准。实验结果表明,MPSO是一种鲁棒的复杂多模态函数全局优化方法。
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引用次数: 12
期刊
2010 5th IEEE Conference on Industrial Electronics and Applications
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