Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376466
Shaofang Zou, Ping Xu, Weidong Xu, Yingle Fan
An automatic monitoring system was developed for simultaneous determination of trace zinc, cadmium, lead, copper, iron and arsenic in environmental aqueous media using electrochemical stripping voltammetry. The sensor was mercury-film silver-based electrode. With a potentiostat, several pumps and valves controlled by computer, the system realized in-situ real-time detection of the six heavy metal ions mentioned above without manual operation. Quantitative heavy metals analysis at parts-per-billion level was performed by standard addition method. One measurement can be completed in 20 min with only 10 ml sample.
{"title":"An Environmental Automatic Monitoring System for Heavy Metals","authors":"Shaofang Zou, Ping Xu, Weidong Xu, Yingle Fan","doi":"10.1109/ICCA.2007.4376466","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376466","url":null,"abstract":"An automatic monitoring system was developed for simultaneous determination of trace zinc, cadmium, lead, copper, iron and arsenic in environmental aqueous media using electrochemical stripping voltammetry. The sensor was mercury-film silver-based electrode. With a potentiostat, several pumps and valves controlled by computer, the system realized in-situ real-time detection of the six heavy metal ions mentioned above without manual operation. Quantitative heavy metals analysis at parts-per-billion level was performed by standard addition method. One measurement can be completed in 20 min with only 10 ml sample.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"252 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120977327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376613
J. Polendo, J.A. Franz, C. Qian
This paper considers a formulation for the global output feedback stabilization of a planar nonlinear system whose nonlinear functions are polynomially bounded in the unmeasurable states. The primary novelty of this method is the utilization of a dual observer approach, estimating linear and higher-order states in parallel.
{"title":"Homogeneous Domination Design using Dual Observers: A Tool for Global Output Feedback Stabilization of Nonlinear Systems with Polynomially Growing Unmeasurable States","authors":"J. Polendo, J.A. Franz, C. Qian","doi":"10.1109/ICCA.2007.4376613","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376613","url":null,"abstract":"This paper considers a formulation for the global output feedback stabilization of a planar nonlinear system whose nonlinear functions are polynomially bounded in the unmeasurable states. The primary novelty of this method is the utilization of a dual observer approach, estimating linear and higher-order states in parallel.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121087691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To nonstationary characteristics of surface electromyography (sEMG) signals, a novel sEMG pattern recognition method, which is based on wavelet packet transformation and support vector machine (SVM), is proposed. Raw four channels sEMG signals from four corresponding muscles are first analyzed with wavelet packet transformation. And then the energy of different frequency bands in the wavelet packet decomposition coefficients is extracted as the signal character to construct eigenvector. A new multi-class SVM classifier is designed with "one versus one" classification strategy and binary tree. Experiment results show that eight upper-limb movement patterns can be well identified after training by the SVM and average identification ratio is 99.375%, and that the SVM can sort out sEMG eight movement patterns more accurately than traditional BP neural network, Elman neural network and RBF neural network. And the SVM recognition result is robust. It offers a new method for sEMG pattern recognition, which can be directly applied to the other nonstationary bioelectric signals pattern recognition study.
{"title":"The Application of Support Vector Machine in Pattern Recognition","authors":"Jianguo Cui, Zhonghai Li, Jian Gao, Rui Lv, Xinhe Xu","doi":"10.1109/ICCA.2007.4376939","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376939","url":null,"abstract":"To nonstationary characteristics of surface electromyography (sEMG) signals, a novel sEMG pattern recognition method, which is based on wavelet packet transformation and support vector machine (SVM), is proposed. Raw four channels sEMG signals from four corresponding muscles are first analyzed with wavelet packet transformation. And then the energy of different frequency bands in the wavelet packet decomposition coefficients is extracted as the signal character to construct eigenvector. A new multi-class SVM classifier is designed with \"one versus one\" classification strategy and binary tree. Experiment results show that eight upper-limb movement patterns can be well identified after training by the SVM and average identification ratio is 99.375%, and that the SVM can sort out sEMG eight movement patterns more accurately than traditional BP neural network, Elman neural network and RBF neural network. And the SVM recognition result is robust. It offers a new method for sEMG pattern recognition, which can be directly applied to the other nonstationary bioelectric signals pattern recognition study.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127119968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376508
Licheng Wu, Shengping Liu, Zhen Lu
A manipulator with free joints is a class of under-actuated mechanisms. Control of such systems is one of major topics in robotics and control engineering. In this paper, we develop a nonlinear feedback controller to force a three-dof planar under-actuated manipulator affected by smooth, bounded uncertainties to globally asymptotically track a reference trajectory. This under-actuated manipulator moving in a horizontal plane has two prismatic actuated joints and one revolute free joint. The control development is based on some coordinate transformations, Lyapunov's direct method and popular integrator backstepping technique. Numerical simulations are presented that demonstrate the effectiveness of the controller.
{"title":"Robust Tracking Control of a Three-DOF Planar Under-actuated Manipulator","authors":"Licheng Wu, Shengping Liu, Zhen Lu","doi":"10.1109/ICCA.2007.4376508","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376508","url":null,"abstract":"A manipulator with free joints is a class of under-actuated mechanisms. Control of such systems is one of major topics in robotics and control engineering. In this paper, we develop a nonlinear feedback controller to force a three-dof planar under-actuated manipulator affected by smooth, bounded uncertainties to globally asymptotically track a reference trajectory. This under-actuated manipulator moving in a horizontal plane has two prismatic actuated joints and one revolute free joint. The control development is based on some coordinate transformations, Lyapunov's direct method and popular integrator backstepping technique. Numerical simulations are presented that demonstrate the effectiveness of the controller.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127203750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376391
Z. Qu, Jing Wang, Xin Li
This paper addresses the problem of applying the Lyapunov direct method to stability analysis of cooperative systems. In particular, cooperative stability and its associated Lyapunov function are sought in terms of the topological properties of a cooperative system. Along this direction, the only available result is for the time-invariant case, it requires irreducibility, and the corresponding Lyapunov function is of form V = Sigmai pix i T xi but its time derivative is only negative semi-definite. In this paper, cooperative control Lyapunov function is defined to be a function which is positive definite with respect to the consensus set x = c1 and whose value monotonically decreases along the system trajectory. A necessary and sufficient condition in terms of the properties of a topology is found for the existence of cooperative control Lyapunov function and, through the introduction and development of an average system, the necessary and sufficient condition is extended to the case of time-varying topology. It is also shown that, under the condition, the cooperative system has the desired stability property and the corresponding Lyapunov function is always of form V =Sigma i pi(xi-xk)T(xi-xk), where k can be determined using the proposed condition for any collection of time-varying topologies.
研究了将李雅普诺夫直接方法应用于合作系统稳定性分析的问题。特别地，从合作系统的拓扑性质出发，寻求合作稳定性及其相关的Lyapunov函数。沿着这个方向，唯一可用的结果是在定常情况下，它要求不可约，对应的Lyapunov函数的形式为V = Sigmai pix i T xi，但其时间导数仅为负半定。本文将合作控制Lyapunov函数定义为一个关于共识集x = c1的正定函数，其值沿系统轨迹单调减小。从拓扑的性质上找到了合作控制Lyapunov函数存在的充分必要条件，并通过对平均系统的引入和发展，将该充分必要条件推广到时变拓扑的情况。还证明了在此条件下，合作系统具有期望的稳定性，对应的Lyapunov函数总是形式为V =Sigma i pi(xi-xk)T(xi-xk)，其中k可以利用所提出的条件对任何时变拓扑集合确定。
{"title":"Quadratic Lyapunov Functions for Cooperative Control of Networked Systems","authors":"Z. Qu, Jing Wang, Xin Li","doi":"10.1109/ICCA.2007.4376391","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376391","url":null,"abstract":"This paper addresses the problem of applying the Lyapunov direct method to stability analysis of cooperative systems. In particular, cooperative stability and its associated Lyapunov function are sought in terms of the topological properties of a cooperative system. Along this direction, the only available result is for the time-invariant case, it requires irreducibility, and the corresponding Lyapunov function is of form V = Sigmai pix i T xi but its time derivative is only negative semi-definite. In this paper, cooperative control Lyapunov function is defined to be a function which is positive definite with respect to the consensus set x = c1 and whose value monotonically decreases along the system trajectory. A necessary and sufficient condition in terms of the properties of a topology is found for the existence of cooperative control Lyapunov function and, through the introduction and development of an average system, the necessary and sufficient condition is extended to the case of time-varying topology. It is also shown that, under the condition, the cooperative system has the desired stability property and the corresponding Lyapunov function is always of form V =Sigma i pi(xi-xk)T(xi-xk), where k can be determined using the proposed condition for any collection of time-varying topologies.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124923922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376498
X. Lu, Xiao Fan Wang, Xiang Li
Using a rewiring-edge method without changing the degree distribution of a network, we propose a weighted homogeneous small-world (HOSW) network model in which all nodes have the same degree. It is found that with the increase of the rewiring probability, which is defined as the ratio of the number of rewiring edges to the total edges in the network, both the average clustering and average path length decrease, however, the network synchronizability is enhanced. Contrary to the result that the synchronizability of NW small-world network is enhanced with the increase of the network size [6], we find that for the same value of rewiring probability, the synchronizability of HOSW network is weakened with the increase of network size.
{"title":"Synchronizability is Enhanced in Homogeneous Small-world Networks","authors":"X. Lu, Xiao Fan Wang, Xiang Li","doi":"10.1109/ICCA.2007.4376498","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376498","url":null,"abstract":"Using a rewiring-edge method without changing the degree distribution of a network, we propose a weighted homogeneous small-world (HOSW) network model in which all nodes have the same degree. It is found that with the increase of the rewiring probability, which is defined as the ratio of the number of rewiring edges to the total edges in the network, both the average clustering and average path length decrease, however, the network synchronizability is enhanced. Contrary to the result that the synchronizability of NW small-world network is enhanced with the increase of the network size [6], we find that for the same value of rewiring probability, the synchronizability of HOSW network is weakened with the increase of network size.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123541923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376379
D. You, M. Shao, Z. Zhou, Yuanyuan Li
A temperature measure & control method was presented in terms of the mold-temperature-control solidification (MTCS) process and validated by experiments. The applied system collects the temperature data using the data collection module and 8 thermocouples placed in the mold. By comparing the measured data with the set temperature control thresholds, the system signals to switch the heating pipes or electromagnetic valves fixed on the channels. The flow control was implemented by developing the application based on the MCGS configuration software. Two experimental control cases whose cooling start thresholds are 500degC and 400degC respectively were done. The results indicate that in case 1, the simultaneous opening of the side and bottom channels lead to the shrinkage cavities in upper center of the part, and in case 2, the forming quality was promoted because solidification was orderly completed from bottom to top by means of reasonably controlling the opening time of the side channels.
{"title":"Research on Temperature Measure and Control Method in Mold-Temperature-Control Solidification","authors":"D. You, M. Shao, Z. Zhou, Yuanyuan Li","doi":"10.1109/ICCA.2007.4376379","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376379","url":null,"abstract":"A temperature measure & control method was presented in terms of the mold-temperature-control solidification (MTCS) process and validated by experiments. The applied system collects the temperature data using the data collection module and 8 thermocouples placed in the mold. By comparing the measured data with the set temperature control thresholds, the system signals to switch the heating pipes or electromagnetic valves fixed on the channels. The flow control was implemented by developing the application based on the MCGS configuration software. Two experimental control cases whose cooling start thresholds are 500degC and 400degC respectively were done. The results indicate that in case 1, the simultaneous opening of the side and bottom channels lead to the shrinkage cavities in upper center of the part, and in case 2, the forming quality was promoted because solidification was orderly completed from bottom to top by means of reasonably controlling the opening time of the side channels.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123594658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376790
Tao Liang, Zhao-ming Lei, Hexu Sun, Tao Lin
This paper introduces a new NCS framework protocol, in which the plant and controller forgo the use of ZOHs, and instead choose to "ignore" the actuators and sensors that are not actively communicating. "Communication sequences" are used to describe the instantaneous medium access status of the sensors and actuators. The effect of medium access constraints can be modeled by cascading the underlying plant with a pair of "communication sequence matrices". We study the stabilization of NCSs under periodic medium access scheduling. One can always find (via a simple algorithm) periodic communication sequences that preserve the reachability and observability of a reversible linear plant. Using these effective communication sequences, an NCS can be exponentially stabilized by an observer-based controller.
{"title":"Modeling and Controller Design for a Class of MIMO Networked Control Systems","authors":"Tao Liang, Zhao-ming Lei, Hexu Sun, Tao Lin","doi":"10.1109/ICCA.2007.4376790","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376790","url":null,"abstract":"This paper introduces a new NCS framework protocol, in which the plant and controller forgo the use of ZOHs, and instead choose to \"ignore\" the actuators and sensors that are not actively communicating. \"Communication sequences\" are used to describe the instantaneous medium access status of the sensors and actuators. The effect of medium access constraints can be modeled by cascading the underlying plant with a pair of \"communication sequence matrices\". We study the stabilization of NCSs under periodic medium access scheduling. One can always find (via a simple algorithm) periodic communication sequences that preserve the reachability and observability of a reversible linear plant. Using these effective communication sequences, an NCS can be exponentially stabilized by an observer-based controller.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"11 21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123698564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376840
Yan Ji, B. Cui
This paper considers the global robust stability of neural networks with both time-varying and unbounded delays. By employing suitable Lyapunov functions, a set of sufficient conditions are derived for the existence, uniqueness, and global robust stability of the equilibrium point. The results are shown to improve and generalize a previously published result. A example is given to illustrate the correctness of our results.
{"title":"Global Robust Stability of Neural Networks With Both Time-Varying and Unbounded Delays","authors":"Yan Ji, B. Cui","doi":"10.1109/ICCA.2007.4376840","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376840","url":null,"abstract":"This paper considers the global robust stability of neural networks with both time-varying and unbounded delays. By employing suitable Lyapunov functions, a set of sufficient conditions are derived for the existence, uniqueness, and global robust stability of the equilibrium point. The results are shown to improve and generalize a previously published result. A example is given to illustrate the correctness of our results.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115018207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376850
Wei Zhang, D. Ma, Zhichao Shao, Changjun Wei, Yike Shi, Hongfeng Yao
A maintenance training simulator system by the method of hardware-in-loop simulation is developed to train the maintenance personal of a certain command and control equipment. This paper introduces the main functions, structure and design of the system's console and core hardware component. A case of fault point setting shows that the system can realize successfully the maintenance training functions of this equipment.
{"title":"Core Hardware Component's Design and Realization of the Maintenance Training Simulation System of a Command and Control Equipment","authors":"Wei Zhang, D. Ma, Zhichao Shao, Changjun Wei, Yike Shi, Hongfeng Yao","doi":"10.1109/ICCA.2007.4376850","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376850","url":null,"abstract":"A maintenance training simulator system by the method of hardware-in-loop simulation is developed to train the maintenance personal of a certain command and control equipment. This paper introduces the main functions, structure and design of the system's console and core hardware component. A case of fault point setting shows that the system can realize successfully the maintenance training functions of this equipment.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"259 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122613190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：