Pub Date : 2015-06-16DOI: 10.1109/MED.2015.7158845
R. Guidorzi, R. Diversi, Loris Vincenzi, Vittorio Simioli
The most common approach in Structural Health Monitoring (SHM) consists in performing accelerometric measures of the response of the monitored structures to natural or artificial stimuli (e.g. wind, urban traffic, seismic events etc.) and in modeling the dynamic behavior of the structure on the basis of these measures. The models can be used, in particular, to extract and compare the main modes i.e. the main resonant frequencies and in comparing these frequencies with those concerning the initial state of integrity of the building. This paper compares the results given by traditional AR and ARMA models with those offered by AR+noise models where an additive observation error is considered and shows that these models can offer some advantages in SHM applications in that describe more accurately the stochastic context of the process. The comparisons have been performed on two different sets of data: the first one has been collected on an industrial building in occasion of an heavy seismic event whereas the second one has been collected on a medieval tower excited by urban traffic.
{"title":"AR+ noise versus AR and ARMA models in SHM-oriented identification","authors":"R. Guidorzi, R. Diversi, Loris Vincenzi, Vittorio Simioli","doi":"10.1109/MED.2015.7158845","DOIUrl":"https://doi.org/10.1109/MED.2015.7158845","url":null,"abstract":"The most common approach in Structural Health Monitoring (SHM) consists in performing accelerometric measures of the response of the monitored structures to natural or artificial stimuli (e.g. wind, urban traffic, seismic events etc.) and in modeling the dynamic behavior of the structure on the basis of these measures. The models can be used, in particular, to extract and compare the main modes i.e. the main resonant frequencies and in comparing these frequencies with those concerning the initial state of integrity of the building. This paper compares the results given by traditional AR and ARMA models with those offered by AR+noise models where an additive observation error is considered and shows that these models can offer some advantages in SHM applications in that describe more accurately the stochastic context of the process. The comparisons have been performed on two different sets of data: the first one has been collected on an industrial building in occasion of an heavy seismic event whereas the second one has been collected on a medieval tower excited by urban traffic.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114801036","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 : 2015-06-16DOI: 10.1109/MED.2015.7158880
D. Csercsik, S. Imre
Assuming wireless communication in scale-free networks, the local routing model can be extended with a novel approach which takes spatial information into account as well. The properties of the proposed model are analyzed in this paper also when the nodes of the network are moving along straight lines in the unit square. Furthermore, we analyze how reconfiguration affects the throughput and energy efficiency of the network.
{"title":"Position guided local routing and reconfiguration in mobile telecommunication networks with scale-free topology","authors":"D. Csercsik, S. Imre","doi":"10.1109/MED.2015.7158880","DOIUrl":"https://doi.org/10.1109/MED.2015.7158880","url":null,"abstract":"Assuming wireless communication in scale-free networks, the local routing model can be extended with a novel approach which takes spatial information into account as well. The properties of the proposed model are analyzed in this paper also when the nodes of the network are moving along straight lines in the unit square. Furthermore, we analyze how reconfiguration affects the throughput and energy efficiency of the network.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114537164","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 : 2015-06-16DOI: 10.1109/MED.2015.7158859
C. Herrera, A. Ibeas
This paper presents a simulation model for a Cash Concentration and Disbursements System (CCDS) seen as an inventory management system, based on difference equations and systems engineering techniques. The model assumes the existence of delays due to banking procedures and analyzes the application of the zero balance accounts concept. The case of a generic company whose agencies are geographically distributed in different regions is proposed. The model assumes the existence of a centrally operated main account and minimum balance policy. This account receives money transfers from the revenues accounts of each agency and, also from the main account, money is transferred to the agencies' expense accounts in order to cover overdrafts. There exist an investment account into which any cash surpluses of the main account are deposited and a credit line in order to avoid the cash deficits. The operating rules for the CCDS are defined, and income and financial costs involved are considered. The model represents the flow of money between the identified elements of the system and the flow of money requirements or transfer orders. An equivalent model represented by algebraic equations through the Z-transform is derived, which opens perspectives for using rigorous control techniques in the field of finance.
{"title":"A simulation model for a Cash Concentration and Disbursements System","authors":"C. Herrera, A. Ibeas","doi":"10.1109/MED.2015.7158859","DOIUrl":"https://doi.org/10.1109/MED.2015.7158859","url":null,"abstract":"This paper presents a simulation model for a Cash Concentration and Disbursements System (CCDS) seen as an inventory management system, based on difference equations and systems engineering techniques. The model assumes the existence of delays due to banking procedures and analyzes the application of the zero balance accounts concept. The case of a generic company whose agencies are geographically distributed in different regions is proposed. The model assumes the existence of a centrally operated main account and minimum balance policy. This account receives money transfers from the revenues accounts of each agency and, also from the main account, money is transferred to the agencies' expense accounts in order to cover overdrafts. There exist an investment account into which any cash surpluses of the main account are deposited and a credit line in order to avoid the cash deficits. The operating rules for the CCDS are defined, and income and financial costs involved are considered. The model represents the flow of money between the identified elements of the system and the flow of money requirements or transfer orders. An equivalent model represented by algebraic equations through the Z-transform is derived, which opens perspectives for using rigorous control techniques in the field of finance.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123573285","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 : 2015-06-16DOI: 10.1109/MED.2015.7158748
T. D. Razafimahefa, N. Héraud, E. Sambatra, O. Wailly
An accurate model and reliable detection system of an induction motor is a very important tool for diagnostic and fault detection. This paper deals with modelling of an inter-turn short circuit in stator and rotor windings of an induction machine and the fault detection at start-up. Winding function approach is chosen for the fault modeling and time-frequency analysis is proposed for the detection of fault. The detection method is based on detection of sidebands at certain frequencies using Wigner-Ville Distribution.
{"title":"Comparative study of inter-turn short circuit fault in stator and rotor windings on a small and Medium Power Wound Rotor Induction Machine","authors":"T. D. Razafimahefa, N. Héraud, E. Sambatra, O. Wailly","doi":"10.1109/MED.2015.7158748","DOIUrl":"https://doi.org/10.1109/MED.2015.7158748","url":null,"abstract":"An accurate model and reliable detection system of an induction motor is a very important tool for diagnostic and fault detection. This paper deals with modelling of an inter-turn short circuit in stator and rotor windings of an induction machine and the fault detection at start-up. Winding function approach is chosen for the fault modeling and time-frequency analysis is proposed for the detection of fault. The detection method is based on detection of sidebands at certain frequencies using Wigner-Ville Distribution.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122100535","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 : 2015-06-16DOI: 10.1109/MED.2015.7158907
E. Kelasidi, K. Pettersen, J. Gravdahl
Energy efficiency is one of the main challenges for long-term autonomy of underwater robotic systems. In this paper, we present results regarding the power consumption of underwater snake robots. In particular, we investigate the relationship between the parameters of the gait patterns, the consumed energy and the forward velocity for different motion patterns for underwater snake robots. Based on a simulation study, we propose empirical rules to choose the parameters of the gait patterns, taking into account both the desired forward velocity and the power consumption of the system. The simulation results show that with respect to the cost of transportation metric, increasing the number of links the energy efficiency decreases for both lateral undulation and eel-like motion.
{"title":"Energy efficiency of underwater snake robot locomotion","authors":"E. Kelasidi, K. Pettersen, J. Gravdahl","doi":"10.1109/MED.2015.7158907","DOIUrl":"https://doi.org/10.1109/MED.2015.7158907","url":null,"abstract":"Energy efficiency is one of the main challenges for long-term autonomy of underwater robotic systems. In this paper, we present results regarding the power consumption of underwater snake robots. In particular, we investigate the relationship between the parameters of the gait patterns, the consumed energy and the forward velocity for different motion patterns for underwater snake robots. Based on a simulation study, we propose empirical rules to choose the parameters of the gait patterns, taking into account both the desired forward velocity and the power consumption of the system. The simulation results show that with respect to the cost of transportation metric, increasing the number of links the energy efficiency decreases for both lateral undulation and eel-like motion.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124527273","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 : 2015-06-16DOI: 10.1109/MED.2015.7158892
Ilias Katsoukis, G. Rovithakis
In this paper, we consider the leader-follower synchronization problem for a class of second order nonlinear multi-agent systems with unknown dynamics and environmental disturbances. The proposed scheme utilizes only local relative state information, it is fully distributed and solves the problem with transient and steady state performance guarantees. In fact, the designed controller has build-in the capability of enforcing pre-determined and designer specified performance bounds on the state tracking errors. Despite the high amount of uncertainty, the controller is structurally and computationally simple, avoiding the use of approximating structures i.e., neural networks, fuzzy systems etc. Simulations are also provided to clarify and verify the approach.
{"title":"Leader-follower tracking with prescribed transient and steady state performance guarantees for a class of unknown nonlinear multi-agent systems","authors":"Ilias Katsoukis, G. Rovithakis","doi":"10.1109/MED.2015.7158892","DOIUrl":"https://doi.org/10.1109/MED.2015.7158892","url":null,"abstract":"In this paper, we consider the leader-follower synchronization problem for a class of second order nonlinear multi-agent systems with unknown dynamics and environmental disturbances. The proposed scheme utilizes only local relative state information, it is fully distributed and solves the problem with transient and steady state performance guarantees. In fact, the designed controller has build-in the capability of enforcing pre-determined and designer specified performance bounds on the state tracking errors. Despite the high amount of uncertainty, the controller is structurally and computationally simple, avoiding the use of approximating structures i.e., neural networks, fuzzy systems etc. Simulations are also provided to clarify and verify the approach.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124655858","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 : 2015-06-16DOI: 10.1109/MED.2015.7158851
S. Arogeti, A. Ailon
The paper proposes controllers for a multi-Quad system that flies in a tight rigid formation. The considered model of the aerial vehicle are highly nonlinear. We propose a control strategy for avoiding collision between neighboring vehicles. The collision avoidance strategy applies in particular the flatness property of the considered system. Simulation results which demonstrate the controller effectivness, are presented.
{"title":"Collision avoidance strategies for quadrotors in tight formation flying","authors":"S. Arogeti, A. Ailon","doi":"10.1109/MED.2015.7158851","DOIUrl":"https://doi.org/10.1109/MED.2015.7158851","url":null,"abstract":"The paper proposes controllers for a multi-Quad system that flies in a tight rigid formation. The considered model of the aerial vehicle are highly nonlinear. We propose a control strategy for avoiding collision between neighboring vehicles. The collision avoidance strategy applies in particular the flatness property of the considered system. Simulation results which demonstrate the controller effectivness, are presented.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124673251","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 : 2015-06-16DOI: 10.1109/MED.2015.7158740
Giuseppe Bernieri, L. Faramondi, F. Pascucci
Degradation of the visual system reduces the mobility of a person that relies only on his sense of touch and hearing. This paper presents the prototype of a low cost smart glove to improve the mobility of the visually impaired people. The glove is equipped with range finders to explore the surroundings: it provides a vibro-tactile feedback on the position of the closest obstacles in range by means of vibration motors. The system is designed to operate with the white cane, enhancing the reliability of this traditional tool.
{"title":"A low cost smart glove for visually impaired people mobility","authors":"Giuseppe Bernieri, L. Faramondi, F. Pascucci","doi":"10.1109/MED.2015.7158740","DOIUrl":"https://doi.org/10.1109/MED.2015.7158740","url":null,"abstract":"Degradation of the visual system reduces the mobility of a person that relies only on his sense of touch and hearing. This paper presents the prototype of a low cost smart glove to improve the mobility of the visually impaired people. The glove is equipped with range finders to explore the surroundings: it provides a vibro-tactile feedback on the position of the closest obstacles in range by means of vibration motors. The system is designed to operate with the white cane, enhancing the reliability of this traditional tool.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127081499","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 : 2015-06-16DOI: 10.1109/MED.2015.7158838
Victoria Plaza-Leiva, J. A. Gómez-Ruiz, F. Ababsa, A. Mandow, J. Morales, A. García-Cerezo
Navigability assessment is useful for planning obstacles free trajectories in autonomous navigation tasks in 3D environments. Based on Geometric-Featured Voxel (GFV) maps developed in previous works, this paper proposes a method for 2D occupancy grid generation which is efficient for local navigation in natural environments. Built from a point cloud, a GFV map consists of voxels that are classified as tubular, planar, or scatter depending on the local spatial distribution of their inner points. Besides, each voxel is labelled as ground or non-ground considering slopes and rough surfaces found in unstructured scenarios. The proposed 2D occupancy grid represents accessible areas by considering the attributes and the height of each voxel over the ground level in relation to vehicle dimensions. The paper presents experimental results with 3D laser scans in natural environments.
{"title":"Occupancy grids generation based on Geometric-Featured Voxel maps","authors":"Victoria Plaza-Leiva, J. A. Gómez-Ruiz, F. Ababsa, A. Mandow, J. Morales, A. García-Cerezo","doi":"10.1109/MED.2015.7158838","DOIUrl":"https://doi.org/10.1109/MED.2015.7158838","url":null,"abstract":"Navigability assessment is useful for planning obstacles free trajectories in autonomous navigation tasks in 3D environments. Based on Geometric-Featured Voxel (GFV) maps developed in previous works, this paper proposes a method for 2D occupancy grid generation which is efficient for local navigation in natural environments. Built from a point cloud, a GFV map consists of voxels that are classified as tubular, planar, or scatter depending on the local spatial distribution of their inner points. Besides, each voxel is labelled as ground or non-ground considering slopes and rough surfaces found in unstructured scenarios. The proposed 2D occupancy grid represents accessible areas by considering the attributes and the height of each voxel over the ground level in relation to vehicle dimensions. The paper presents experimental results with 3D laser scans in natural environments.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129938559","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 : 2015-06-16DOI: 10.1109/MED.2015.7158841
T. Schild, Johannes Fütterer, Roozbeh Sangi, Rita Streblow, D. Müller
Energy efficiency of buildings has been identified as a core element in facing the climate change and the scarcity of energy resources. The energy supply system for a building is, especially with view on thermal interrelations, a highly complex and heterogeneous system that emerges jointly with the building construction, the user's behavior, the weather conditions and the surrounding energy and price policy to a real system-of-system. The building control system as the “intelligent instance” of the System of Systems (SoS) takes a special role in realizing the potential of the joint operating constituent systems due to the energy efficiency of the building or district. We apply SoS as an innovative engineering approach to a complex energy system.
{"title":"System of Systems theory as a new perspective on building control","authors":"T. Schild, Johannes Fütterer, Roozbeh Sangi, Rita Streblow, D. Müller","doi":"10.1109/MED.2015.7158841","DOIUrl":"https://doi.org/10.1109/MED.2015.7158841","url":null,"abstract":"Energy efficiency of buildings has been identified as a core element in facing the climate change and the scarcity of energy resources. The energy supply system for a building is, especially with view on thermal interrelations, a highly complex and heterogeneous system that emerges jointly with the building construction, the user's behavior, the weather conditions and the surrounding energy and price policy to a real system-of-system. The building control system as the “intelligent instance” of the System of Systems (SoS) takes a special role in realizing the potential of the joint operating constituent systems due to the energy efficiency of the building or district. We apply SoS as an innovative engineering approach to a complex energy system.","PeriodicalId":316642,"journal":{"name":"2015 23rd Mediterranean Conference on Control and Automation (MED)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130905173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：