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2009 Chinese Control and Decision Conference最新文献

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Observer-based H∞ control for discrete-time T-S fuzzy systems 离散T-S模糊系统的观测器H∞控制
Pub Date : 2011-10-01 DOI: 10.1080/00207721003653708
Xiaoheng Chang, Guanghong Yang, Haibo Wang
This paper is concerned with the problem of observer-based H∞ control for discrete-time Takagi-Sugeno (T-S) fuzzy systems, and new design methods are presented. By defining a fuzzy Lyapunov function, a new sufficient condition guaranteeing the H∞ performance of the T-S fuzzy systems is derived, and the condition is expressed by a set of linear matrix inequalities (LMIs). In comparison with the existing literature, the proposed approach may provide more relaxed condition while ensuring better H∞ performance. The simulation results illustrate the effectiveness of the proposed approach.
研究离散时间Takagi-Sugeno (T-S)模糊系统基于观测器的H∞控制问题,提出了新的设计方法。通过定义模糊Lyapunov函数,导出了T-S模糊系统H∞性能的一个新的充分条件,该条件用一组线性矩阵不等式(lmi)表示。与已有文献相比,本文提出的方法可以提供更宽松的条件,同时保证更好的H∞性能。仿真结果表明了该方法的有效性。
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引用次数: 27
An approach to optimal design of stabilizing PID controllers for time-delay systems 时滞系统稳定PID控制器的优化设计方法
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5192414
Pingkang Li, Peng Wang, Xiuxia Du
A novel approach to find the optimal stabilizing regions for PID control systems with time-delay is proposed. The method is based on the observation that the stabilizing PID compensators form a set of polyhedral sets in the three-dimensional parameter space. To avoid the lack of constraints problem, which prohibits the optimization of three PID controller parameters, the robustness constraint is integrated into the stable region determination algorithm. The constraint defines a set of controller parameters such that the maximum sensitivities are less than prescribed values. Compared with previous results it is considerably simpler and faster to determine such parameter regions by combining a so-called dual-locus diagram with the maximum sensitivity constrains with the integral gain Ki as the system performance measure. The approach presented works well without sweeping over parameters, and do not need complex numerical calculations to achieve the required performance. The simulations have shown the effectiveness of the method.
提出了一种寻找具有时滞的PID控制系统最优稳定区域的新方法。该方法是基于观察稳定PID补偿器在三维参数空间中形成一组多面体集。为了避免缺乏约束而无法对PID控制器的三个参数进行优化的问题,在稳定区域确定算法中加入了鲁棒性约束。约束定义了一组控制器参数,使最大灵敏度小于规定值。与以往的结果相比,通过将具有最大灵敏度约束的所谓双轨迹图与积分增益Ki结合作为系统性能度量来确定这些参数区域要简单得多,而且速度要快得多。所提出的方法不需要扫过参数,也不需要复杂的数值计算来达到所需的性能。仿真结果表明了该方法的有效性。
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引用次数: 5
Research on airplane health forecast method based on the improved MGM(1, n) 基于改进MGM(1, n)的飞机健康预报方法研究
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5195044
Jianguo Cui, Desheng Song, Shiliang Dong, Mingzhuo Wang, Xiaopeng Liang, Xinhe Xu
There is strong randomness and uncertainty lying in the health status of airplane. Because the former grey models can not forecast the random signals efficiently, a new forecast method for the health state of airplane, based on the improved MGM(1, n), is presented in this paper. The advanced acoustic emission (AE) technique is used to collect the health state information. The original AE signals are decomposed with the wavelet transform. The energy values, eigenvalues and standard deviation of the third layer wavelet decomposition low frequency coefficients are respectively extracted to form eigenvectors. Then the improved MGM(1, n) is established by these eigenvectors. The improved algorithm is realized by feeding back the errors between the forecast values and the actual ones so as to improve the forecast precision. Experiments show that the improved MGM(1, n) can forecast the airplane stabilizer fatigue crack more accurately than the GM (1, 1). And this new method has been successfully applied to the forecast system of the health state of airplane structure components.
飞机健康状态具有很强的随机性和不确定性。针对以往灰色模型不能有效预测随机信号的问题,提出了一种基于改进MGM(1, n)的飞机健康状态预测方法。采用先进的声发射(AE)技术采集健康状态信息。用小波变换对原始声发射信号进行分解。分别提取第三层小波分解低频系数的能量值、特征值和标准差构成特征向量。然后利用这些特征向量建立改进的MGM(1, n)。改进算法通过反馈预测值与实际值之间的误差来实现,从而提高了预测精度。实验表明,改进的MGM(1,n)比GM(1,1)能更准确地预测飞机尾翼疲劳裂纹,并已成功应用于飞机结构部件健康状态的预测系统中。
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引用次数: 1
Stabilization control of the nonlinear system 非线性系统的镇定控制
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5191605
Shujing Wu, Dazhong Wang, S. Okubo
In this paper, we propose a new design by the stabilization control of the nonlinear system. With this method, we obtain a simple input control law. The internal state for the control is stable. Finally, an example is given to illustrate the effectiveness of the proposed method.
本文通过对非线性系统进行镇定控制,提出了一种新的设计方法。利用这种方法,我们得到了一个简单的输入控制律。控制的内部状态是稳定的。最后,通过一个算例说明了所提方法的有效性。
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引用次数: 0
Enhanced batch process monitoring using Kalman filter and multiway kernel principal component analysis 利用卡尔曼滤波和多路核主成分分析增强批处理监控
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5195053
Yongsheng Qi, Pu Wang, Shunjie Fan, Xuejin Gao, Jun-feng Jiang
Batch processes are very important in most industries and are used to produce high-value-added products, which cause their monitoring and control to emerge as essential techniques. In this paper, a new method was developed based on Kalman filter(KF) and multiway kernel principal component analysis(MKPCA) for on-line batch process monitoring. Three-way batch data of normal batch process are unfolded batch-wise. Then KPCA is used to capture the nonlinear characteristics within normal batch processes and set up the more accurate monitoring model of batch processes. The on-line monitoring uses a Kalman filter which can estimate the entire trajectory of the current batch run. Comparison of the monitoring performance of the method with that of the traditional multiway principal component analysis(MPCA) method on a benchmark fed-batch penicillin fermentation process shows that the proposed method had better monitoring performance, and that fewer false alarms and small fault detection delay were obtained. In both off-line analysis and on-line batch monitoring, the proposed approach can effectively extract the nonlinear relationships among the process variables.
批处理过程在大多数工业中非常重要,用于生产高附加值产品,这使得批处理过程的监测和控制成为必不可少的技术。提出了一种基于卡尔曼滤波(KF)和多路核主成分分析(MKPCA)的间歇过程在线监测方法。正常批处理过程的三向批数据按批展开。然后利用KPCA捕捉正常批处理过程的非线性特征,建立更精确的批处理过程监控模型。在线监测采用卡尔曼滤波,可以估计当前批次运行的整个轨迹。将该方法与传统的多路主成分分析(MPCA)方法对青霉素发酵过程的监测性能进行了比较,结果表明,该方法具有更好的监测性能,虚警少,故障检测延迟小。无论是离线分析还是在线批量监测,该方法都能有效地提取过程变量之间的非线性关系。
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引用次数: 3
Analysis of coordination and profit sharing with trade credit in supply chain 供应链中贸易信用的协调与利益分享分析
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5191674
Y. Liping, Hu Xiaoyuan
This paper considers a supply chain consisting of a supplier and a retailer. When the supplier offers the trade credit to the retailer, their target profit will change and supply chain's profit will increase due to coordination. We develop a coordination mechanism through trade credit that both of the parties can divide the additional profit or the total profit equitably for two cases, case 1: no pre-decided individual target profit for the two members; case2: with pre-decided target profit for the two members. The inventory model of trade credit in supply chain is developed, and the order quantity and the credit period for coordinating supply chain is educed, and the effect of the model for sharing the profit and supply chain's coordination is analyzed. Finally the results were analyzed by conducting numerical examples.
本文考虑一个由供应商和零售商组成的供应链。当供应商向零售商提供贸易信用时,他们的目标利润会发生变化,供应链的利润会因为协调而增加。在两种情况下,我们通过贸易信用开发了一种双方可以公平分配额外利润或总利润的协调机制:情况1:双方成员没有预先确定的个人目标利润;案例2:为两名成员预先设定目标利润。建立了供应链中贸易信用的库存模型,导出了协调供应链的订单数量和信用周期,并分析了利润共享模型和供应链协调的效果。最后通过数值算例对结果进行了分析。
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引用次数: 2
A new global asymptotic stability result for delayed cellular neural networks 时滞细胞神经网络的一个新的全局渐近稳定性结果
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5192532
Jing Liu, Ce Zhang
This paper studies the problem of global asymptotic stability for delayed cellular neural networks(DCNNs). A new stability condition is obtained by utilizing the Lyapunov functional method and the matrix inequality approach. This condition is less restrictive and generalizes some of the previous stability results derived in the literature.
研究了延迟细胞神经网络的全局渐近稳定性问题。利用李雅普诺夫泛函方法和矩阵不等式方法,得到了一个新的稳定性条件。这个条件限制较少,并且推广了以前文献中得出的一些稳定性结果。
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引用次数: 0
Fuzzy theory application in quality management 模糊理论在质量管理中的应用
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5191813
Liyan Wang, Jiafu Tang, L. Qian, Qiu Deyu
Modern manufacturing environments are complicating and evolving, which is random fuzzy in nature, but quality has always been the domain of accurate science, and the traditional methods for assessing the capability of manufacturing processes are dealing with precise quality, so the introduction of fuzzy quality is an overall comprehensive reflection of precise quality. Instead of precise quality, fuzzy quality and its relative contents with fuzzy theory are discussed here, especially fuzzy statistical process control (SPC)-fuzzy control chart and fuzzy process capability indices-PCIs, other applications in quality tools with fuzzy theory are also mentioned, and the results show that it is helpful.
现代制造环境是复杂多变的,本质上是随机模糊的,而质量一直是精确科学的研究领域,传统的制造过程能力评价方法都是针对精确质量的,因此模糊质量的引入是对精确质量的全面综合反映。本文讨论了模糊质量及其相关内容,特别是模糊统计过程控制(SPC)-模糊控制图和模糊过程能力指标- pci,并讨论了模糊理论在质量工具中的其他应用,结果表明它是有帮助的。
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引用次数: 0
Compensation of networked control systems with time-delay and data packet losses 具有时延和数据包丢失的网络控制系统补偿
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5195190
Ma Yongguang, Chen Wenying, Luo Guangxiao
With the incertitude of the network-induced time-delay and data packet losses in networked control systems(NCS), the performance of control systems would degrade, even destabilize. In this paper, a new design of controller is presented, here the controller uses event and time driving, and state observer is designed for estimating the states and compensation for time delay and dropout. Then the closed system is modeled as asynchronous dynamical system constrained by configuration event rate. Exponential stability theory is used to analyze the stability of the closed loop system, and the states feedback controller design method is presented. The result of simulation experiment shows the validity of the proposed method, which well guarantees the stability of networked control systems with uncertain network-induced time-delay and data packet losses.
在网络控制系统(NCS)中,由于网络引起的时延和数据包丢失的不确定性,控制系统的性能会下降,甚至不稳定。本文提出了一种新的控制器设计,该控制器采用事件和时间驱动,并设计了状态观测器来估计系统的状态并补偿系统的时延和时延。然后将封闭系统建模为受组态事件率约束的异步动态系统。利用指数稳定性理论分析了闭环系统的稳定性,提出了状态反馈控制器的设计方法。仿真实验结果表明了所提方法的有效性,能很好地保证具有不确定网络时延和数据包丢失的网络化控制系统的稳定性。
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引用次数: 6
Image matching based on ant colony algorithm 基于蚁群算法的图像匹配
Pub Date : 2009-06-17 DOI: 10.1109/CCDC.2009.5191495
Hongyan Shi, Zhaoyu Bei
Ant colony algorithm(ACA)is a kind of discrete, parallel and robust evolutionary algorithm with fuzzy clustering ability. ACA has been introduced into image matching from the aspect of fuzzy clustering. The gray value, gratitude and neighbourhood of pixels are considered synthetically. This method is shown as a new algorithm by the test on computer.
蚁群算法是一种具有模糊聚类能力的离散、并行、鲁棒的进化算法。从模糊聚类的角度将蚁群算法引入到图像匹配中。综合考虑像素的灰度值、感激度和邻域。在计算机上的试验表明,该方法是一种新的算法。
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2009 Chinese Control and Decision Conference
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