Pub Date : 2007-11-05DOI: 10.1109/ICCA.2007.4376365
Jifeng Guo, Cunchen Gao
Synthesis and design of variable structure controller for time-invariant linear time-delay singular system is studied. Firstly, a new restricted system equivalent form is developed. In the case that uncertain part of the system satisfy matching conditions, the system is decomposed into two low dimensional subsystems: one is a normal linear differential difference system without input; another is a linear difference system with uncertain party and input. Secondly, based on some results on asymptotic stability of singular system with time-delay, switching function with integral compensator is studied, and sufficient conditions on asymptotic stability of sliding mode are given. Thirdly, variable structure controller is designed, which can force the solution trajectory of the system to arrive at slide manifold in finite time. Finally, two numerical examples are given to demonstrate feasibility and simplicity of the design method.
{"title":"Synthesis of Variable Structure Controller for Time-delay Uncertain Singular System","authors":"Jifeng Guo, Cunchen Gao","doi":"10.1109/ICCA.2007.4376365","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376365","url":null,"abstract":"Synthesis and design of variable structure controller for time-invariant linear time-delay singular system is studied. Firstly, a new restricted system equivalent form is developed. In the case that uncertain part of the system satisfy matching conditions, the system is decomposed into two low dimensional subsystems: one is a normal linear differential difference system without input; another is a linear difference system with uncertain party and input. Secondly, based on some results on asymptotic stability of singular system with time-delay, switching function with integral compensator is studied, and sufficient conditions on asymptotic stability of sliding mode are given. Thirdly, variable structure controller is designed, which can force the solution trajectory of the system to arrive at slide manifold in finite time. Finally, two numerical examples are given to demonstrate feasibility and simplicity of the design method.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"14 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":"130186683","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.2007.4376936
Wenjun Xiong, Jigui Jian, Jinde Cao
This paper deals with a Lotka-Volterra time-varying delays. By using a transformational approach, we change the nonlinear Lotka-Volterra system into a linear model. Then, we present some new and simple conditions to guarantee the globally exponential stability of the positive solution of the linear model. Finally, an illustrated example is given to demonstrate the effectiveness of our results.
{"title":"Novel Stability Criteria of A Lotka-Volterra System with Time-varying Delays","authors":"Wenjun Xiong, Jigui Jian, Jinde Cao","doi":"10.1109/ICCA.2007.4376936","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376936","url":null,"abstract":"This paper deals with a Lotka-Volterra time-varying delays. By using a transformational approach, we change the nonlinear Lotka-Volterra system into a linear model. Then, we present some new and simple conditions to guarantee the globally exponential stability of the positive solution of the linear model. Finally, an illustrated example is given to demonstrate the effectiveness of our results.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"52 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":"130450843","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.2007.4376824
Lei Yu, Shuxia Han, Dawei Qi, Haiyan Gu
In this paper, we apply computed tomography (CT) technology for log nondestructive testing and calculate the CT number range of different log tomography slices in statistic method, then the parameters of CT window level and window width in log testing procedure were set. Thus it provides a fast operation procedure in the log nondestructive testing based on CT. Because of the linear relationship between wood density and CT number the fitting linear formula between CT number and wood density was calculated. Therefore a new method is provided in the nondestructive testing of log defect and wood density.
{"title":"Automatic and Fast Testing of Wood Density Based on Computed Tomography","authors":"Lei Yu, Shuxia Han, Dawei Qi, Haiyan Gu","doi":"10.1109/ICCA.2007.4376824","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376824","url":null,"abstract":"In this paper, we apply computed tomography (CT) technology for log nondestructive testing and calculate the CT number range of different log tomography slices in statistic method, then the parameters of CT window level and window width in log testing procedure were set. Thus it provides a fast operation procedure in the log nondestructive testing based on CT. Because of the linear relationship between wood density and CT number the fitting linear formula between CT number and wood density was calculated. Therefore a new method is provided in the nondestructive testing of log defect and wood density.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"161 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":"134106825","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.2007.4376534
Renming Wang, D. Liao, Tangxian Chen
In this paper, stabilization problems for a particular class of non linear continuous model with time-delays in the form of Takagi-Sugeno(TS) are investigated. The considered models are of multiple time-delays in state. Some new sufficient conditions for stability and stabilizability are given. They are based on some PDC control laws and some matrix translation properties. First of all, we derive stability conditions of unforced and forced system of considering model, respectively. We then discuss stabilization problem with two cases: (i) unknown delays and (ii) known delays, and give stabilization conditions via LMI. All given conditions are in the form of LMI's and it's easy to be checked by means of MATLAB. Finally, two examples are worked out to illustrate the theory.
{"title":"Stabilization Conditions for Continuous T-S Fuzzy Systems with Time-Delays","authors":"Renming Wang, D. Liao, Tangxian Chen","doi":"10.1109/ICCA.2007.4376534","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376534","url":null,"abstract":"In this paper, stabilization problems for a particular class of non linear continuous model with time-delays in the form of Takagi-Sugeno(TS) are investigated. The considered models are of multiple time-delays in state. Some new sufficient conditions for stability and stabilizability are given. They are based on some PDC control laws and some matrix translation properties. First of all, we derive stability conditions of unforced and forced system of considering model, respectively. We then discuss stabilization problem with two cases: (i) unknown delays and (ii) known delays, and give stabilization conditions via LMI. All given conditions are in the form of LMI's and it's easy to be checked by means of MATLAB. Finally, two examples are worked out to illustrate the theory.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"15 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":"133976516","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.2007.4376631
Wei Chen, Xiaohong Hao, Jie Lin
Voltage sags have become an important power quality issue in power system over the past several years. Voltage sags are short duration reductions in RMS voltage, mainly caused by short circuits, transformer energizing, and starting on large motors. Aim of this paper is to show that there are certain types of voltage sags that should be considered in the analysis of monitoring data as showed the analysis of a large number of recordings. In the paper voltage sags were analyzed based on a PSB simulation model. Then presents a method to identify the voltage sag in distribution system using a novel combination of wavelet transform and support vector machines. The simulated waves were discomposed into 7 levers using wavelet transform, afterwards, the energy features, which was extracted from the wavelet coefficients under different levers, were employed as the inputs of the support vector machines to identify and classify the voltage sags. The results of simulation and case study show the proposed method is simple and validity.
{"title":"Identification of Voltage Sags in Distribution System Using Wavelet Transform and SVM","authors":"Wei Chen, Xiaohong Hao, Jie Lin","doi":"10.1109/ICCA.2007.4376631","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376631","url":null,"abstract":"Voltage sags have become an important power quality issue in power system over the past several years. Voltage sags are short duration reductions in RMS voltage, mainly caused by short circuits, transformer energizing, and starting on large motors. Aim of this paper is to show that there are certain types of voltage sags that should be considered in the analysis of monitoring data as showed the analysis of a large number of recordings. In the paper voltage sags were analyzed based on a PSB simulation model. Then presents a method to identify the voltage sag in distribution system using a novel combination of wavelet transform and support vector machines. The simulated waves were discomposed into 7 levers using wavelet transform, afterwards, the energy features, which was extracted from the wavelet coefficients under different levers, were employed as the inputs of the support vector machines to identify and classify the voltage sags. The results of simulation and case study show the proposed method is simple and validity.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"16 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":"132979364","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.2007.4376561
Yu Haijie, Liao Xiangyang, S. Sheng
The ecological industry chain is different from the conventional industry chain. Therefore, the price decisions for the conventional industry chain are not suitable for the ecological industry chain. In order to solve the price decision problem of the ecological industry chain, a two stages ecological industry chain system is took as the background. The upstream enterprise produces its main products according to the market demand and sells its byproducts (or wastes) to downstream enterprise. Price decisions of byproducts or wastes were studied based on game theory. Sequential interaction game equilibrium (Stackelberg equilibrium) and cooperative game equilibrium (coordination in price decision) were obtained. Efficiency comparisons of every decision were further analyzed. Finally, price decisions under the shortage of material situation were discussed.
{"title":"Price Decision Analysis Based on Game Theory for Two Stages Ecological Industry Chain","authors":"Yu Haijie, Liao Xiangyang, S. Sheng","doi":"10.1109/ICCA.2007.4376561","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376561","url":null,"abstract":"The ecological industry chain is different from the conventional industry chain. Therefore, the price decisions for the conventional industry chain are not suitable for the ecological industry chain. In order to solve the price decision problem of the ecological industry chain, a two stages ecological industry chain system is took as the background. The upstream enterprise produces its main products according to the market demand and sells its byproducts (or wastes) to downstream enterprise. Price decisions of byproducts or wastes were studied based on game theory. Sequential interaction game equilibrium (Stackelberg equilibrium) and cooperative game equilibrium (coordination in price decision) were obtained. Efficiency comparisons of every decision were further analyzed. Finally, price decisions under the shortage of material situation were discussed.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"48 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":"130985089","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.2007.4376322
Xiyun Yang, Lingfeng Xu, Y. Liu, Daping Xu
Doubly fed induction generator (DFIG) for variable speed wind turbines can capture more wind power. However active power and the reactive power have coupling characteristic to affect performance of conventional control. A multivariable predictive functional control (MPFC) based first-order model are proposed for doubly fed induction generator. Models the DFIG in d-q reference frame is given and are transferred first-order mode. The control law is optimized to obtain based multivariable first-order system. Decoupling task is part of MPFC algorithm. MPFC performances compared with PI with reference tracking and parametric robustness are carried out. Results show MPFC has rapid response and better robustness.
{"title":"Multivariable Predictive Functional Control for Doubly Fed Induction Generator","authors":"Xiyun Yang, Lingfeng Xu, Y. Liu, Daping Xu","doi":"10.1109/ICCA.2007.4376322","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376322","url":null,"abstract":"Doubly fed induction generator (DFIG) for variable speed wind turbines can capture more wind power. However active power and the reactive power have coupling characteristic to affect performance of conventional control. A multivariable predictive functional control (MPFC) based first-order model are proposed for doubly fed induction generator. Models the DFIG in d-q reference frame is given and are transferred first-order mode. The control law is optimized to obtain based multivariable first-order system. Decoupling task is part of MPFC algorithm. MPFC performances compared with PI with reference tracking and parametric robustness are carried out. Results show MPFC has rapid response and better robustness.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"55 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":"133309993","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.2007.4376376
Dechuan Chen, Hao Zhang, Meifang Wang
Magnetic powder brake is often taken as a functional element in strip unwinding tension control system. In view of the wide range variations of web radius and line transport velocity in strip unwinding process, as a rule, the strip tension control system is terribly disturbed by the abovementioned variations during unwinding process. To make the tension control system more robust, this paper has proposed a kind of intelligent varistructural adjustment method of auto-adapted compensation for change in web radius, and the feed-forward compensation for the change in velocity rate in the intelligent tension controller. In addition, the tension controller sends another output signal in "S shape" cosine curve as the set point to the control system line transport velocity. This paper has shown the results of simulation for the control system and its application, and has also introduced the scheme for achievement based on DSP of TMS320LF2407A as the core technology. This system has been successfully applied to a plastic film slitting machine.
{"title":"An Intelligent Tension Control System in Strip Unwinding Process","authors":"Dechuan Chen, Hao Zhang, Meifang Wang","doi":"10.1109/ICCA.2007.4376376","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376376","url":null,"abstract":"Magnetic powder brake is often taken as a functional element in strip unwinding tension control system. In view of the wide range variations of web radius and line transport velocity in strip unwinding process, as a rule, the strip tension control system is terribly disturbed by the abovementioned variations during unwinding process. To make the tension control system more robust, this paper has proposed a kind of intelligent varistructural adjustment method of auto-adapted compensation for change in web radius, and the feed-forward compensation for the change in velocity rate in the intelligent tension controller. In addition, the tension controller sends another output signal in \"S shape\" cosine curve as the set point to the control system line transport velocity. This paper has shown the results of simulation for the control system and its application, and has also introduced the scheme for achievement based on DSP of TMS320LF2407A as the core technology. This system has been successfully applied to a plastic film slitting machine.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"107 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":"133760181","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.2007.4376681
Lin Jian, Zhu Bangzhu
In this paper, a novel neural network ensemble model, i.e. NNEIPCABag, which combines the feature selection technique, the improved principal component analysis (IPCA), with the Bagging method, is presented. Then the proposed model is employed for time series forecasting with the favor results obtained, which shows that the generalization ability of the proposed model can be superior to that of neural network ensemble only with the Bagging method, .i.e. NNEBag.
{"title":"Neural Network Ensemble Based on Feature Selection","authors":"Lin Jian, Zhu Bangzhu","doi":"10.1109/ICCA.2007.4376681","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376681","url":null,"abstract":"In this paper, a novel neural network ensemble model, i.e. NNEIPCABag, which combines the feature selection technique, the improved principal component analysis (IPCA), with the Bagging method, is presented. Then the proposed model is employed for time series forecasting with the favor results obtained, which shows that the generalization ability of the proposed model can be superior to that of neural network ensemble only with the Bagging method, .i.e. NNEBag.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"44 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":"133767778","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.2007.4376574
Guangzhi Dai, Tiequn Chen
A new type of home intelligent cleaner adopted the ultrasonic and infrared sensor array, which has the function of the real-time environment perception, is introduced, and this cleaner driven by step-motor has the ability of autonomous working by itself and the functions of the automatic obstacle detection and obstacle avoidance. This paper adopts the grid scanning algorithm based on electric map realize floor coverage task, and designs synthesis detection system based on sensor array finding method technology according to algorithm characteristics, experimental results for obstacle detection by static finding indicate that the designed detection system improves cleaning robot's environment perception and path search ability greatly.
{"title":"Design on Measurement and Control System of Cleaning Robot Based on Sensor Array detection","authors":"Guangzhi Dai, Tiequn Chen","doi":"10.1109/ICCA.2007.4376574","DOIUrl":"https://doi.org/10.1109/ICCA.2007.4376574","url":null,"abstract":"A new type of home intelligent cleaner adopted the ultrasonic and infrared sensor array, which has the function of the real-time environment perception, is introduced, and this cleaner driven by step-motor has the ability of autonomous working by itself and the functions of the automatic obstacle detection and obstacle avoidance. This paper adopts the grid scanning algorithm based on electric map realize floor coverage task, and designs synthesis detection system based on sensor array finding method technology according to algorithm characteristics, experimental results for obstacle detection by static finding indicate that the designed detection system improves cleaning robot's environment perception and path search ability greatly.","PeriodicalId":301284,"journal":{"name":"2007 IEEE International Conference on Control and Automation","volume":"37 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":"124084433","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}
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