Pub Date : 2012-09-01DOI: 10.1109/CCSII.2012.6470481
K. George, M. Krishnapur, R. Makam
The principal objectives in this paper are to achieve output tracking when the given unknown plant and the compensator are connected through a communication network, and to simultaneously address the effects of both network-induced delays and packet dropouts. Their effects are mitigated by using the available information intelligently. Further, we use the multiple models, switching, and tuning methodology to improve the transient performance.
{"title":"Improving performance in networked adaptive systems with multiple models","authors":"K. George, M. Krishnapur, R. Makam","doi":"10.1109/CCSII.2012.6470481","DOIUrl":"https://doi.org/10.1109/CCSII.2012.6470481","url":null,"abstract":"The principal objectives in this paper are to achieve output tracking when the given unknown plant and the compensator are connected through a communication network, and to simultaneously address the effects of both network-induced delays and packet dropouts. Their effects are mitigated by using the available information intelligently. Further, we use the multiple models, switching, and tuning methodology to improve the transient performance.","PeriodicalId":389895,"journal":{"name":"2012 IEEE Conference on Control, Systems & Industrial Informatics","volume":"302 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132617822","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 : 2012-09-01DOI: 10.1109/CCSII.2012.6470501
J. Okitsu, S. Sulaiman, K. Naono, N. Zakaria, A. Oxley
Free cooling has become widely used in the area of computer room thermal control, especially where the temperature constraint can be relaxed. However, in tropical regions, such as Malaysia, free cooling cannot be applied all of the time. This paper presents a strategy for grids that allows jobs to be executed on resources that are free cooled. The paper describes how a recommended period of time for using free cooled resources is predicted. The period is predicted from a historical analysis by using machine learning. Experiments on a classroom used for campus grid computing showed that, typically, free cooled resources can be used for 5 hours per day, when the temperature is less than 28 degrees Celsius. The result is of use to those developing campus grids in tropical countries.
{"title":"Towards greening a campus grid: Free cooling during unsociable hours","authors":"J. Okitsu, S. Sulaiman, K. Naono, N. Zakaria, A. Oxley","doi":"10.1109/CCSII.2012.6470501","DOIUrl":"https://doi.org/10.1109/CCSII.2012.6470501","url":null,"abstract":"Free cooling has become widely used in the area of computer room thermal control, especially where the temperature constraint can be relaxed. However, in tropical regions, such as Malaysia, free cooling cannot be applied all of the time. This paper presents a strategy for grids that allows jobs to be executed on resources that are free cooled. The paper describes how a recommended period of time for using free cooled resources is predicted. The period is predicted from a historical analysis by using machine learning. Experiments on a classroom used for campus grid computing showed that, typically, free cooled resources can be used for 5 hours per day, when the temperature is less than 28 degrees Celsius. The result is of use to those developing campus grids in tropical countries.","PeriodicalId":389895,"journal":{"name":"2012 IEEE Conference on Control, Systems & Industrial Informatics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128731811","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 : 2012-09-01DOI: 10.1109/CCSII.2012.6470507
L. N. Lioe, Y. Heryadi
A directory system is an indispensable and inseparable facility for a campus building. Numerous studies have been conducted on developing a building directory system for public visitors, however, to the best of our knowledge, little is known on a directory system for a campus building using 3D web-based simulation technology. This research paper presents a method to develop a building directory system which adopted 3D web-based simulation and conventional directory mode for each user interface. The system was developed using the user-center system design method which comprises of some iterative cyclesthat are aimed to achieved a usable design from user perspective. Although the system was primarily built based on the Joseph Wibowo Center Campus building as the model, the adopted technique is applicable to meet requirement of the various target building. The usability evaluation conformance test has shown promising results that the model was accepted by potential users.
{"title":"A method to build usable directory system using 3D web-based simulation and directory mode","authors":"L. N. Lioe, Y. Heryadi","doi":"10.1109/CCSII.2012.6470507","DOIUrl":"https://doi.org/10.1109/CCSII.2012.6470507","url":null,"abstract":"A directory system is an indispensable and inseparable facility for a campus building. Numerous studies have been conducted on developing a building directory system for public visitors, however, to the best of our knowledge, little is known on a directory system for a campus building using 3D web-based simulation technology. This research paper presents a method to develop a building directory system which adopted 3D web-based simulation and conventional directory mode for each user interface. The system was developed using the user-center system design method which comprises of some iterative cyclesthat are aimed to achieved a usable design from user perspective. Although the system was primarily built based on the Joseph Wibowo Center Campus building as the model, the adopted technique is applicable to meet requirement of the various target building. The usability evaluation conformance test has shown promising results that the model was accepted by potential users.","PeriodicalId":389895,"journal":{"name":"2012 IEEE Conference on Control, Systems & Industrial Informatics","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126517313","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 : 2012-09-01DOI: 10.1109/CCSII.2012.6470484
N. Shaharuddin, I. Darus
This paper presents an active vibration control strategy in order to prevent resonance occurrence in marine offshore vertical riser pipe. Experimental data collected by previous research are used as an input - output data for system identification. Both Least Squares (LS) and Recursive Least Squares (RLS) methods are employed to model the dynamic response of the riser pipe at a particular speed. An auto-tuned PID controller algorithm is developed and implemented for suppression of the riser pipe's vibration. The research revealed the superiority of RLS in modeling the system with the lowest mean squared error of 0.0062. Later, the transfer function obtained by RLS identification technique was utilized within Matlab SIMULINK environment for development of the PID active vibration controller (PID - AVC) using Iterative Learning Algorithm (ILA). The iterative learning PID - AVC controller's capability in suppressing the vortex induced vibration for marine riser and its robustness was tested, verified and proven.
{"title":"Active vibration control of marine riser","authors":"N. Shaharuddin, I. Darus","doi":"10.1109/CCSII.2012.6470484","DOIUrl":"https://doi.org/10.1109/CCSII.2012.6470484","url":null,"abstract":"This paper presents an active vibration control strategy in order to prevent resonance occurrence in marine offshore vertical riser pipe. Experimental data collected by previous research are used as an input - output data for system identification. Both Least Squares (LS) and Recursive Least Squares (RLS) methods are employed to model the dynamic response of the riser pipe at a particular speed. An auto-tuned PID controller algorithm is developed and implemented for suppression of the riser pipe's vibration. The research revealed the superiority of RLS in modeling the system with the lowest mean squared error of 0.0062. Later, the transfer function obtained by RLS identification technique was utilized within Matlab SIMULINK environment for development of the PID active vibration controller (PID - AVC) using Iterative Learning Algorithm (ILA). The iterative learning PID - AVC controller's capability in suppressing the vortex induced vibration for marine riser and its robustness was tested, verified and proven.","PeriodicalId":389895,"journal":{"name":"2012 IEEE Conference on Control, Systems & Industrial Informatics","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131320774","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 : 2012-09-01DOI: 10.1109/CCSII.2012.6470497
E. Setiawan, I. Hodaka, Y. Yamamoto, I. Jikuya
A Maximum Power Point Tracking (MPPT) is commonly applied in photovoltaic system in order to harvest the maximal power. One of the widely used MPPT techniques is so-called Perturb and Observe (P&O). However, P&O MPPT has a shortage on operating point swinging around maximum power point (MPP), where one can never achieve a MPP. In order to reduce the shortage, new nonlinear control is presented. The proposed control is applied for boost converter which is commonly used in photovoltaic system. The controller is designed based on state-space averaging and nonlinear control theory. In the experiment, the proposed controller is implemented in a real circuit that utilizes solar array simulator to displace the photovoltaic module. Experiment result shows that the proposed method can suppress the oscillation of MPPT.
{"title":"Improvement of Maximum Power Point Tracking based on nonlinear control of boost converter","authors":"E. Setiawan, I. Hodaka, Y. Yamamoto, I. Jikuya","doi":"10.1109/CCSII.2012.6470497","DOIUrl":"https://doi.org/10.1109/CCSII.2012.6470497","url":null,"abstract":"A Maximum Power Point Tracking (MPPT) is commonly applied in photovoltaic system in order to harvest the maximal power. One of the widely used MPPT techniques is so-called Perturb and Observe (P&O). However, P&O MPPT has a shortage on operating point swinging around maximum power point (MPP), where one can never achieve a MPP. In order to reduce the shortage, new nonlinear control is presented. The proposed control is applied for boost converter which is commonly used in photovoltaic system. The controller is designed based on state-space averaging and nonlinear control theory. In the experiment, the proposed controller is implemented in a real circuit that utilizes solar array simulator to displace the photovoltaic module. Experiment result shows that the proposed method can suppress the oscillation of MPPT.","PeriodicalId":389895,"journal":{"name":"2012 IEEE Conference on Control, Systems & Industrial Informatics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130364142","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 : 2012-09-01DOI: 10.1109/CCSII.2012.6470487
R. T. P. Eek, S. Sahlan, N. Wahab
This paper investigates the application of Model Order Reduction (MOR) technique to Waste Water Treatment Plant (WWTP) system. The mathematical model of WWTP is obtained by using System Identification. In this paper, Prediction Error Estimate of Linear or Nonlinear Model (PEM) is proposed as the System Identification method which is used to find the parameter of linear or nonlinear system in state-space model from an experimental input-output data WWTP. The result shows that the estimated model of WWTP is a high order system with good best fit with 91.56% and 80.19% compared to the original experimental model. To simplify the obtained model,the MOR technique is proposed to reduce the high order system to lower order system while still retaining the characteristics of the original system. In this paper, the balanced truncation and Frequency Weighted Model Reduction (FWMR) are proposed to obtain a lower order WWTP model. The result shows that by MOR techniques, the higher WWTP system can be simplified to lower order system with a low error of the reduced system. The result of reduced model will be represented in sigma graph and numerical value.
{"title":"Modeling of Waste Water Treatment Plant via system ID & model reduction technique","authors":"R. T. P. Eek, S. Sahlan, N. Wahab","doi":"10.1109/CCSII.2012.6470487","DOIUrl":"https://doi.org/10.1109/CCSII.2012.6470487","url":null,"abstract":"This paper investigates the application of Model Order Reduction (MOR) technique to Waste Water Treatment Plant (WWTP) system. The mathematical model of WWTP is obtained by using System Identification. In this paper, Prediction Error Estimate of Linear or Nonlinear Model (PEM) is proposed as the System Identification method which is used to find the parameter of linear or nonlinear system in state-space model from an experimental input-output data WWTP. The result shows that the estimated model of WWTP is a high order system with good best fit with 91.56% and 80.19% compared to the original experimental model. To simplify the obtained model,the MOR technique is proposed to reduce the high order system to lower order system while still retaining the characteristics of the original system. In this paper, the balanced truncation and Frequency Weighted Model Reduction (FWMR) are proposed to obtain a lower order WWTP model. The result shows that by MOR techniques, the higher WWTP system can be simplified to lower order system with a low error of the reduced system. The result of reduced model will be represented in sigma graph and numerical value.","PeriodicalId":389895,"journal":{"name":"2012 IEEE Conference on Control, Systems & Industrial Informatics","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121595587","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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