Pub Date : 2013-06-23DOI: 10.1109/ASCC.2013.6606376
Dandan Liu, Qijun Chen
Prediction of energy consumption is an important task in energy conservation. Due to support vector regression has good performance in dealing with non-linear data regression problem, in recent years it often was used to predict building energy consumption. Based on the historical data we conclude the relationship between lighting energy consumption and its influencing factors is non-linear. To develop accurate prediction model of lighting energy consumption, the support vector regression with radial basis function was applied. The forecast results indicate that the prediction accuracy of support vector regression is higher than neural networks. The prediction model can forecast the building hourly energy consumption and assess the impact of office building energy management plans.
{"title":"Prediction of building lighting energy consumption based on support vector regression","authors":"Dandan Liu, Qijun Chen","doi":"10.1109/ASCC.2013.6606376","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606376","url":null,"abstract":"Prediction of energy consumption is an important task in energy conservation. Due to support vector regression has good performance in dealing with non-linear data regression problem, in recent years it often was used to predict building energy consumption. Based on the historical data we conclude the relationship between lighting energy consumption and its influencing factors is non-linear. To develop accurate prediction model of lighting energy consumption, the support vector regression with radial basis function was applied. The forecast results indicate that the prediction accuracy of support vector regression is higher than neural networks. The prediction model can forecast the building hourly energy consumption and assess the impact of office building energy management plans.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82817085","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606113
C. Y. Chen, W. Hxiao, Y. C. Chen, J. Tu
Dynamic substructuring is a hybrid testing strategy, which enables full-size, critical components of an entire engineering system to be physically tested, whilst the remaining parts are simulated numerically. Successful tests require a robust controller to compensate for unwanted dynamics introduced by supplemental actuators within the physical substructure and to achieve synchronized responses of the numerical and physical parts in real-time. The aim of this feasibility study tries to identify the relative strength and weakness of three types of substructuring control strategy in literature, including (i) emulated-system-based (ii) numerical-substructure-based, and (iii) output-based controllers. The first two controllers are synthesized via conventional dynamics-based approaches, while the third using forward-prediction and curve-fitting concepts is classified as a geometry-based strategy. A practical substructuring example using a shaking-table system is presented for control comparisons. In the presence of uncertainties with the actuators or specimens, simulation studies show that these controllers exhibit distinct robustness in different cases.
{"title":"Preliminary feasibility studies of real-time substructuring control strategies","authors":"C. Y. Chen, W. Hxiao, Y. C. Chen, J. Tu","doi":"10.1109/ASCC.2013.6606113","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606113","url":null,"abstract":"Dynamic substructuring is a hybrid testing strategy, which enables full-size, critical components of an entire engineering system to be physically tested, whilst the remaining parts are simulated numerically. Successful tests require a robust controller to compensate for unwanted dynamics introduced by supplemental actuators within the physical substructure and to achieve synchronized responses of the numerical and physical parts in real-time. The aim of this feasibility study tries to identify the relative strength and weakness of three types of substructuring control strategy in literature, including (i) emulated-system-based (ii) numerical-substructure-based, and (iii) output-based controllers. The first two controllers are synthesized via conventional dynamics-based approaches, while the third using forward-prediction and curve-fitting concepts is classified as a geometry-based strategy. A practical substructuring example using a shaking-table system is presented for control comparisons. In the presence of uncertainties with the actuators or specimens, simulation studies show that these controllers exhibit distinct robustness in different cases.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90050537","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606094
Chao Wang, Weiwei Mao, Xiaobo Li, Weisheng Chen, Jing Li
This paper studies the consensus problem for linear discrete-time second-order multi-agent system with quantized data under directed topologies. The necessary and sufficient conditions for consensus are given by using a quantized consensus protocol via positions and velocities. Also, the final consensus value is obtained if the design parameters satisfy the conditions of the quantized consensus and the length of quantization interval tends to zero. Furthermore, the observer-based quantized consensus is investigated as well when the velocities of agents are unavailable. Simulation examples are provided to verify and illustrate the theoretical results obtained in this paper.
{"title":"Quantized-data consensus of second-order multi-agent systems with directed topology","authors":"Chao Wang, Weiwei Mao, Xiaobo Li, Weisheng Chen, Jing Li","doi":"10.1109/ASCC.2013.6606094","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606094","url":null,"abstract":"This paper studies the consensus problem for linear discrete-time second-order multi-agent system with quantized data under directed topologies. The necessary and sufficient conditions for consensus are given by using a quantized consensus protocol via positions and velocities. Also, the final consensus value is obtained if the design parameters satisfy the conditions of the quantized consensus and the length of quantization interval tends to zero. Furthermore, the observer-based quantized consensus is investigated as well when the velocities of agents are unavailable. Simulation examples are provided to verify and illustrate the theoretical results obtained in this paper.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90252238","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606364
Jinna Qin, François Léonard, G. Abba
This paper proposes a non-linear observer to estimate not only the state (position and velocity) of links but also the external forces exerted by the robot during Friction Stir Welding (FSW) processes. The difficulty of performing this process with a robot lies in its lack of rigidity. In order to ensure a better tracking performance, the data such as real positions, velocities of links and external forces are required. However, those variations are not always measured in most industrial robots. Therefore, in this study, an observer is proposed to reconstruct those necessary parameters by using only measurements of motor side. The proposed observer is carried out on a 6 DOF flexible-joint industrial manipulator used in a FSW process.
{"title":"Experimental external force estimation using a non-linear observer for 6 axes flexible-joint industrial manipulators","authors":"Jinna Qin, François Léonard, G. Abba","doi":"10.1109/ASCC.2013.6606364","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606364","url":null,"abstract":"This paper proposes a non-linear observer to estimate not only the state (position and velocity) of links but also the external forces exerted by the robot during Friction Stir Welding (FSW) processes. The difficulty of performing this process with a robot lies in its lack of rigidity. In order to ensure a better tracking performance, the data such as real positions, velocities of links and external forces are required. However, those variations are not always measured in most industrial robots. Therefore, in this study, an observer is proposed to reconstruct those necessary parameters by using only measurements of motor side. The proposed observer is carried out on a 6 DOF flexible-joint industrial manipulator used in a FSW process.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89318955","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606304
Y. Cheon, Donghyun Lee, In-Beum Lee, S. Sung
This paper presents a new strategy of PID autotuning which is combined with an operational optimization for Molten Carbonate Fuel Cell (MCFC) systems to track the power demand with high efficiency. The PID auto-tuning methodology is based on frequency response identification and a model reduction to a fractional low order model. And the operational optimization problem is formulated by a radial basis functional neural network model. The proposed control strategy provides good control performance for the successive power demand changes and successfully compensates the nonlinearity of the MCFC system.
{"title":"A new PID auto-tuning strategy with operational optimization for MCFC systems","authors":"Y. Cheon, Donghyun Lee, In-Beum Lee, S. Sung","doi":"10.1109/ASCC.2013.6606304","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606304","url":null,"abstract":"This paper presents a new strategy of PID autotuning which is combined with an operational optimization for Molten Carbonate Fuel Cell (MCFC) systems to track the power demand with high efficiency. The PID auto-tuning methodology is based on frequency response identification and a model reduction to a fractional low order model. And the operational optimization problem is formulated by a radial basis functional neural network model. The proposed control strategy provides good control performance for the successive power demand changes and successfully compensates the nonlinearity of the MCFC system.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89940442","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606312
Marcos Orellana, R. Griñó
Nowadays, ac/dc power converters must fulfill more and more design constraints with respect to the electrical grid: harmonics reduction, operation with sags and swells and/or high grid impedances, etc. This is a challenge for the controllers, since they must be robust enough to ensure the stability of the system, specially when working the conditions are not the ideal ones. In this paper, a discrete-time control technique based on Adaptive Feed-forward Cancellation (AFC) is proposed for a three-phase three-wire rectifier with a LCL input filter. The continuous-time design method for resonators has been translated into the discrete-time domain. Thus, the controller has been entirely designed in discrete-time, avoiding approximate conversions of the controller from the continuous-time domain. Besides, the usual unit computational delay in sampled-data control systems is taken into account. The simulation results show that this kind of resonant control is not only robust, but also presents a good performance.
{"title":"Digital AFC control of a three-phase three-wire unity-power-factor PWM rectifier","authors":"Marcos Orellana, R. Griñó","doi":"10.1109/ASCC.2013.6606312","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606312","url":null,"abstract":"Nowadays, ac/dc power converters must fulfill more and more design constraints with respect to the electrical grid: harmonics reduction, operation with sags and swells and/or high grid impedances, etc. This is a challenge for the controllers, since they must be robust enough to ensure the stability of the system, specially when working the conditions are not the ideal ones. In this paper, a discrete-time control technique based on Adaptive Feed-forward Cancellation (AFC) is proposed for a three-phase three-wire rectifier with a LCL input filter. The continuous-time design method for resonators has been translated into the discrete-time domain. Thus, the controller has been entirely designed in discrete-time, avoiding approximate conversions of the controller from the continuous-time domain. Besides, the usual unit computational delay in sampled-data control systems is taken into account. The simulation results show that this kind of resonant control is not only robust, but also presents a good performance.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86762866","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606408
G. Duan
In this paper, a new type of nonhomogeneous second-order generalized Sylvester equations (GSEs) are proposed. A complete general parametric solution in a neat explicit closed form is established using the F-coprimeness condition. The primary feature of this solution is that the matrix F does not need to be in any canonical form, or may be even unknown a priori. The matrix R, together with the matrix F, may be both set undetermined and used as degrees of freedom beyond the completely free parameter matrix Z. The results provide great convenience to the computation and analysis of the solutions to this class of equations, and can perform important functions in many control systems analysis and design problems involving second-order dynamical systems.
{"title":"Solution to second-order nonhomogeneous generalized Sylvester equations","authors":"G. Duan","doi":"10.1109/ASCC.2013.6606408","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606408","url":null,"abstract":"In this paper, a new type of nonhomogeneous second-order generalized Sylvester equations (GSEs) are proposed. A complete general parametric solution in a neat explicit closed form is established using the F-coprimeness condition. The primary feature of this solution is that the matrix F does not need to be in any canonical form, or may be even unknown a priori. The matrix R, together with the matrix F, may be both set undetermined and used as degrees of freedom beyond the completely free parameter matrix Z. The results provide great convenience to the computation and analysis of the solutions to this class of equations, and can perform important functions in many control systems analysis and design problems involving second-order dynamical systems.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87416658","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606401
A. Cezayirli
We propose a new methodology in order to provide faster convergence in adaptive control of a class of nonlinear plants. Currently, each model in a multi-model adaptive system is evaluated as a whole, using a cost function derived from estimation errors. Therefore the number of fixed models required for improvement in transient response becomes quite large, for the plants having several unknown parameters. The proposed scheme removes this difficulty by considering each parameter sequentially and individually; and provides better convergence as compared to classical multi-model adaptive systems by using an assumption that a decrease in any element of the parameter error vector results in decrease in the state estimation error and vice-versa.
{"title":"A new technique in multi-model adaptive control: Sequential parameter discrimination and hybrid parameter vector","authors":"A. Cezayirli","doi":"10.1109/ASCC.2013.6606401","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606401","url":null,"abstract":"We propose a new methodology in order to provide faster convergence in adaptive control of a class of nonlinear plants. Currently, each model in a multi-model adaptive system is evaluated as a whole, using a cost function derived from estimation errors. Therefore the number of fixed models required for improvement in transient response becomes quite large, for the plants having several unknown parameters. The proposed scheme removes this difficulty by considering each parameter sequentially and individually; and provides better convergence as compared to classical multi-model adaptive systems by using an assumption that a decrease in any element of the parameter error vector results in decrease in the state estimation error and vice-versa.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88862363","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606306
E. Sariyildiz, Kemal Uçak, K. Ohnishi, Gülay Öke Günel, H. Temeltas
In this paper, three intelligent system methods namely Artificial Neural Network (ANN), Support Vector Machine (SVM) and Adaptive Neuro Fuzzy Inference Systems (ANFIS), are implemented to solve the inverse kinematics problem of the industrial robot arms. The main advantages of the intelligent system based solutions in the robot kinematics are that they can be easily implemented in analysis of complex mechanisms and their solutions do not suffer by the singularity that is one of the fundamental problems of inverse kinematics. The screw theory and quaternion algebra based kinematic model is used to improve the model efficiency by decreasing the computational complexity and load. The kinematics problem of the Staubli TX-60L industrial robot arm is analyzed by using the proposed intelligent system based solutions and simulation results are given.
{"title":"Intelligent systems based solutions for the kinematics problem of the industrial robot arms","authors":"E. Sariyildiz, Kemal Uçak, K. Ohnishi, Gülay Öke Günel, H. Temeltas","doi":"10.1109/ASCC.2013.6606306","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606306","url":null,"abstract":"In this paper, three intelligent system methods namely Artificial Neural Network (ANN), Support Vector Machine (SVM) and Adaptive Neuro Fuzzy Inference Systems (ANFIS), are implemented to solve the inverse kinematics problem of the industrial robot arms. The main advantages of the intelligent system based solutions in the robot kinematics are that they can be easily implemented in analysis of complex mechanisms and their solutions do not suffer by the singularity that is one of the fundamental problems of inverse kinematics. The screw theory and quaternion algebra based kinematic model is used to improve the model efficiency by decreasing the computational complexity and load. The kinematics problem of the Staubli TX-60L industrial robot arm is analyzed by using the proposed intelligent system based solutions and simulation results are given.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88872255","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 : 2013-06-23DOI: 10.1109/ASCC.2013.6606037
Wang Jing, Jiang Wei, Cao Liulin, Jin Qibing, Wang Wei
A dynamical search space harmony search (DSHS) algorithm in order to improve the efficiency of standard harmony search algorithm. The DSHS employs two strategies which are dynamically changing the search space and ancillary harmony-memory to increase the diversity of harmonies and the global search ability. First the ratio of twin-harmony is defined which is an index of identifying the diversity of harmonies in the Harmony Memory (HM). Then the search space is dynamically changed according to the max ratio of twin-harmony. Finally, ancillary harmony-memories are introduced to replace worse harmonies in the HM, which can keep the main HM from getting into troubles of HM diversity lacking and the local minimum point. Various benchmarks and PID tuning problem are performed to demonstrate the effectiveness of proposed algorithm.
{"title":"A dynamical search space harmony search for unconstrained optimization problems","authors":"Wang Jing, Jiang Wei, Cao Liulin, Jin Qibing, Wang Wei","doi":"10.1109/ASCC.2013.6606037","DOIUrl":"https://doi.org/10.1109/ASCC.2013.6606037","url":null,"abstract":"A dynamical search space harmony search (DSHS) algorithm in order to improve the efficiency of standard harmony search algorithm. The DSHS employs two strategies which are dynamically changing the search space and ancillary harmony-memory to increase the diversity of harmonies and the global search ability. First the ratio of twin-harmony is defined which is an index of identifying the diversity of harmonies in the Harmony Memory (HM). Then the search space is dynamically changed according to the max ratio of twin-harmony. Finally, ancillary harmony-memories are introduced to replace worse harmonies in the HM, which can keep the main HM from getting into troubles of HM diversity lacking and the local minimum point. Various benchmarks and PID tuning problem are performed to demonstrate the effectiveness of proposed algorithm.","PeriodicalId":6304,"journal":{"name":"2013 9th Asian Control Conference (ASCC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78963716","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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