Pub Date : 2014-12-11DOI: 10.1109/CCA.2014.6981362
K. Atta, A. Johansson, M. Cervantes, T. Gustafsson
The Combinator is an important part in Kaplan turbine control. It ensures that the turbine will operate in an optimum way, in terms of maximum efficiency of the plant. This work suggests a new sinusoidal perturbation based extremum seeking algorithm based on the phasor of the output. We propose to use this algorithm for generating the required data to build and correct the combinator. Simulations are presented showing the applicability of the proposed methods.
{"title":"Phasor extremum seeking and its application in Kaplan turbine control","authors":"K. Atta, A. Johansson, M. Cervantes, T. Gustafsson","doi":"10.1109/CCA.2014.6981362","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981362","url":null,"abstract":"The Combinator is an important part in Kaplan turbine control. It ensures that the turbine will operate in an optimum way, in terms of maximum efficiency of the plant. This work suggests a new sinusoidal perturbation based extremum seeking algorithm based on the phasor of the output. We propose to use this algorithm for generating the required data to build and correct the combinator. Simulations are presented showing the applicability of the proposed methods.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132967212","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981485
K. Treichel, J. Reger, Remon Al Azrak
A novel approach for devising trajectory tracking controllers is presented. The approach is based on a combination of flatness-based controller design and L1 adaptive control. The nominal part of the tracking controller involves concepts from differential flatness. In order to preserve the nominal closed-loop dynamics in the presence of time-varying matched uncertainties the controller is augmented by an L1 adaptive controller component. We investigate the stability of the proposed scheme and show its effectiveness on an illustrative simulation example.
{"title":"On flatness based L1 adaptive trajectory tracking control","authors":"K. Treichel, J. Reger, Remon Al Azrak","doi":"10.1109/CCA.2014.6981485","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981485","url":null,"abstract":"A novel approach for devising trajectory tracking controllers is presented. The approach is based on a combination of flatness-based controller design and L1 adaptive control. The nominal part of the tracking controller involves concepts from differential flatness. In order to preserve the nominal closed-loop dynamics in the presence of time-varying matched uncertainties the controller is augmented by an L1 adaptive controller component. We investigate the stability of the proposed scheme and show its effectiveness on an illustrative simulation example.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130983471","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981325
Morten Juelsgaard, André Teixeira, M. Johansson, R. Wisniewski, J. Bendtsen
This work presents a distributed framework for coordination of flexible electricity consumption for a number of households in the distribution grid. Coordination is conducted with the purpose of minimizing a trade-off between individual concerns about discomfort and electricity cost, on the one hand, and joint concerns about grid losses and voltage variations on the other. Our contribution is to demonstrate how distributed coordination of both active and reactive consumption may be conducted, when consumers are jointly coupled by grid losses and voltage variations. We further illustrate the benefit of including consumption coordination for grid operation, and how different types of consumption present different benefits.
{"title":"Distributed coordination of household electricity consumption","authors":"Morten Juelsgaard, André Teixeira, M. Johansson, R. Wisniewski, J. Bendtsen","doi":"10.1109/CCA.2014.6981325","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981325","url":null,"abstract":"This work presents a distributed framework for coordination of flexible electricity consumption for a number of households in the distribution grid. Coordination is conducted with the purpose of minimizing a trade-off between individual concerns about discomfort and electricity cost, on the one hand, and joint concerns about grid losses and voltage variations on the other. Our contribution is to demonstrate how distributed coordination of both active and reactive consumption may be conducted, when consumers are jointly coupled by grid losses and voltage variations. We further illustrate the benefit of including consumption coordination for grid operation, and how different types of consumption present different benefits.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132946349","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981544
Jakub Bernat, J. Kołota, S. Stępień, G. Szymanski
The presented paper proposes a novel control method of Permanent Magnet Synchronous Machine. Thanks to a recent technique called adaptive backstepping, adjustment of all motor parameters is obtained considering well known dq model. Furthermore, the introduction of a new trajectory generator gives the possibility to limit the reference current without breaking the adaptation process. Examples are calculated to illustrate the properties of the new control method.
{"title":"Adaptive control of permanent magnet synchronous motor with constrained reference current exploiting backstepping methodology","authors":"Jakub Bernat, J. Kołota, S. Stępień, G. Szymanski","doi":"10.1109/CCA.2014.6981544","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981544","url":null,"abstract":"The presented paper proposes a novel control method of Permanent Magnet Synchronous Machine. Thanks to a recent technique called adaptive backstepping, adjustment of all motor parameters is obtained considering well known dq model. Furthermore, the introduction of a new trajectory generator gives the possibility to limit the reference current without breaking the adaptation process. Examples are calculated to illustrate the properties of the new control method.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114210059","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981390
R. Skarda, M. Cech, M. Schlegel
Nowadays, companies are facing a strong pressure for industrial plant and machine optimization in order to achieve energy and material savings and increase product quality. Control loop performance assessment techniques create one cornerstone of this challenge. In process control applications, the performance is frequently compared just to the minimum variance controller. It is known that when optimizing process controllers having fixed structure (e.g. PIDs) different concepts must be applied. In authors recent work, the systematic approach for a class of fractional-order processes was presented. The method uses only a limited a priori information about the process. The performance index is defined as a difference between reference and actual sensitivity function at selected frequencies. In this paper, a minimally invasive method for performance index estimation is proposed. It employs running discrete Fourier transform. Next, the paper discusses various practical aspects and verifies the method on real temperature process.
{"title":"Minimally invasive control loop performance evaluation","authors":"R. Skarda, M. Cech, M. Schlegel","doi":"10.1109/CCA.2014.6981390","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981390","url":null,"abstract":"Nowadays, companies are facing a strong pressure for industrial plant and machine optimization in order to achieve energy and material savings and increase product quality. Control loop performance assessment techniques create one cornerstone of this challenge. In process control applications, the performance is frequently compared just to the minimum variance controller. It is known that when optimizing process controllers having fixed structure (e.g. PIDs) different concepts must be applied. In authors recent work, the systematic approach for a class of fractional-order processes was presented. The method uses only a limited a priori information about the process. The performance index is defined as a difference between reference and actual sensitivity function at selected frequencies. In this paper, a minimally invasive method for performance index estimation is proposed. It employs running discrete Fourier transform. Next, the paper discusses various practical aspects and verifies the method on real temperature process.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114866948","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981385
Ruchir Goswami, A. Kelkar, J. Vogel
This paper presents a novel methodology for a control of aircraft using spatially distributed surface pressure sensors namely, flush air data sensors (FADS). The methodology combines the advantages derived from robustness properties of passivity-based control theory with richness of sensory information obtained from judiciously distributed network of highly sensitive (responsive) FADS. It is shown that FADS feedback can be effectively used to control aircraft motion. The redundancy in FADS is exploited using a sensor blending strategy that can render the input-output system passive over a range of parameters and thus making it amenable for robust feedback control. The paper presents some early results which show the potential of the proposed FADS-based control methodology. The results show that FADS can also be an alternative to using traditional motion sensors for control of aircraft systems. The paper discusses various aspects of FADS-based control concept including placement of sensors, feedback architecture, blending algorithms, and future potential for such a concept.
{"title":"Aircraft control using spatially distributed flush air data sensor feedback","authors":"Ruchir Goswami, A. Kelkar, J. Vogel","doi":"10.1109/CCA.2014.6981385","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981385","url":null,"abstract":"This paper presents a novel methodology for a control of aircraft using spatially distributed surface pressure sensors namely, flush air data sensors (FADS). The methodology combines the advantages derived from robustness properties of passivity-based control theory with richness of sensory information obtained from judiciously distributed network of highly sensitive (responsive) FADS. It is shown that FADS feedback can be effectively used to control aircraft motion. The redundancy in FADS is exploited using a sensor blending strategy that can render the input-output system passive over a range of parameters and thus making it amenable for robust feedback control. The paper presents some early results which show the potential of the proposed FADS-based control methodology. The results show that FADS can also be an alternative to using traditional motion sensors for control of aircraft systems. The paper discusses various aspects of FADS-based control concept including placement of sensors, feedback architecture, blending algorithms, and future potential for such a concept.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114597321","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981418
Hojin Jung, H. Jin, Sooyoung Kim, Seibum B. Choi
This paper describes simplified burnt gas fraction estimation method for turbocharged diesel engine with dual loop exhaust gas recirculation (EGR) system. According to the strengthening emission gas regulation in diesel engine, burnt gas fraction has become principal factor for diesel engine air path system. Previous burnt gas fraction estimation method was valid only for a few operating point because of many assumptions used to prove the observability. Or it limits the condition which is not appropriate for practical use. By introducing a simplified burnt gas fraction dynamics, observability can be proved only with a single assumption. Asymptotic stability of the burnt gas fraction observer was proved by Lyapunov analysis. The observer was validated on a 6L heavy duty diesel engine GT-POWER model with various engine operating points.
{"title":"Simplified burnt gas fraction estimation for turbocharged diesel engine with dual loop EGR system","authors":"Hojin Jung, H. Jin, Sooyoung Kim, Seibum B. Choi","doi":"10.1109/CCA.2014.6981418","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981418","url":null,"abstract":"This paper describes simplified burnt gas fraction estimation method for turbocharged diesel engine with dual loop exhaust gas recirculation (EGR) system. According to the strengthening emission gas regulation in diesel engine, burnt gas fraction has become principal factor for diesel engine air path system. Previous burnt gas fraction estimation method was valid only for a few operating point because of many assumptions used to prove the observability. Or it limits the condition which is not appropriate for practical use. By introducing a simplified burnt gas fraction dynamics, observability can be proved only with a single assumption. Asymptotic stability of the burnt gas fraction observer was proved by Lyapunov analysis. The observer was validated on a 6L heavy duty diesel engine GT-POWER model with various engine operating points.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114780979","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981461
L. Riccardi, G. Rizzello, D. Naso, B. Holz, S. Seelecke, H. Janocha, B. Turchiano
The need for mechatronic devices that are lightweight, less cumbersome and able to produce small, quick and precise movements or forces is ever increasing in many fields of engineering. Many recent design solutions are based on electrically, magnetically or thermally activated materials, often referred to as smart materials. This tutorial paper overviews the main properties and the resulting applications of two recently discovered smart materials, magnetic shape memory alloys (MSMAs) and electroactive polymers (EAPs), which have complementary characteristics and seem suitable to overcome some of the inherent limitations of other materials widely used in industrial applications, such as piezoelectric ceramics. As many other smart materials, MSMAs and EAPs exhibit nonlinear, hysteretic and time-varying behaviors, and therefore this tutorial discusses the main ways to model and effectively compensate these critical issues with advanced control strategies.
{"title":"Modeling and control of innovative smart materials and actuators: A tutorial","authors":"L. Riccardi, G. Rizzello, D. Naso, B. Holz, S. Seelecke, H. Janocha, B. Turchiano","doi":"10.1109/CCA.2014.6981461","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981461","url":null,"abstract":"The need for mechatronic devices that are lightweight, less cumbersome and able to produce small, quick and precise movements or forces is ever increasing in many fields of engineering. Many recent design solutions are based on electrically, magnetically or thermally activated materials, often referred to as smart materials. This tutorial paper overviews the main properties and the resulting applications of two recently discovered smart materials, magnetic shape memory alloys (MSMAs) and electroactive polymers (EAPs), which have complementary characteristics and seem suitable to overcome some of the inherent limitations of other materials widely used in industrial applications, such as piezoelectric ceramics. As many other smart materials, MSMAs and EAPs exhibit nonlinear, hysteretic and time-varying behaviors, and therefore this tutorial discusses the main ways to model and effectively compensate these critical issues with advanced control strategies.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134193162","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981330
H. Dahmani, O. Pagès, A. Hajjaji
In this paper, a fuzzy proportional integral (PI) state feedback controller has been developed in order to improve vehicle traction on slippery roads. A nonlinear model has been formulated from the vehicle longitudinal dynamics, the drivetrain model and the wheel motion. Takagi-Sugeno (TS) representation has been used in order to take into account the nonlinearities of the obtained model and to simplify the controller design. The objective of the proposed controller is to compute the optimal engine torque so that the longitudinal slip ratio does not exceed a desired value which is the limit of the optimal traction and the vehicle stability. Lypunov and H∞ approaches have been used in the controller design and stability conditions are given in terms of Linear Matrix Inequalities (LMI). In order to show the effectiveness of the developed approaches, the vehicle model has been simulated on a slippery road with and without traction control system.
{"title":"Fuzzy proportional-integral state feedback controller For vehicle traction control system","authors":"H. Dahmani, O. Pagès, A. Hajjaji","doi":"10.1109/CCA.2014.6981330","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981330","url":null,"abstract":"In this paper, a fuzzy proportional integral (PI) state feedback controller has been developed in order to improve vehicle traction on slippery roads. A nonlinear model has been formulated from the vehicle longitudinal dynamics, the drivetrain model and the wheel motion. Takagi-Sugeno (TS) representation has been used in order to take into account the nonlinearities of the obtained model and to simplify the controller design. The objective of the proposed controller is to compute the optimal engine torque so that the longitudinal slip ratio does not exceed a desired value which is the limit of the optimal traction and the vehicle stability. Lypunov and H∞ approaches have been used in the controller design and stability conditions are given in terms of Linear Matrix Inequalities (LMI). In order to show the effectiveness of the developed approaches, the vehicle model has been simulated on a slippery road with and without traction control system.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134490864","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 : 2014-12-11DOI: 10.1109/CCA.2014.6981372
S. Tabatabaeipour, T. Bak
In this paper, a computationally efficient set-membership method for robust fault detection of linear systems is proposed. The method computes an interval outer-approximation of the output of the system that is consistent with the model, the bounds on noise and disturbance, and the past measurements. If the output of the system does not belong to this interval, a fault is detected. To compute the output interval, we propose using support functions. Only two support functions for each output must be computed which results in a computationally efficient algorithm. Moreover, the method is trivially parallelizable. The method is demonstrated for fault detection of a hydraulic pitch actuator of a wind turbine. We show the effectiveness of the proposed method by comparing our results with two zonotope-based set-membership methods.
{"title":"Robust fault detection of linear systems using a computationally efficient set-membership method","authors":"S. Tabatabaeipour, T. Bak","doi":"10.1109/CCA.2014.6981372","DOIUrl":"https://doi.org/10.1109/CCA.2014.6981372","url":null,"abstract":"In this paper, a computationally efficient set-membership method for robust fault detection of linear systems is proposed. The method computes an interval outer-approximation of the output of the system that is consistent with the model, the bounds on noise and disturbance, and the past measurements. If the output of the system does not belong to this interval, a fault is detected. To compute the output interval, we propose using support functions. Only two support functions for each output must be computed which results in a computationally efficient algorithm. Moreover, the method is trivially parallelizable. The method is demonstrated for fault detection of a hydraulic pitch actuator of a wind turbine. We show the effectiveness of the proposed method by comparing our results with two zonotope-based set-membership methods.","PeriodicalId":205599,"journal":{"name":"2014 IEEE Conference on Control Applications (CCA)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133698515","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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