Pub Date : 1999-07-12DOI: 10.1109/ISIE.1999.797010
Ž. Ivanović, B. Kuzmanovic
Zagreb Electrical Tramway plans to modernize its tram fleet. The first step is defining the modernization technical requirements. Initial measurements of motor drive operating conditions were performed in selected traffic sections in Zagreb city. The results show a rather different way of defining the technical requirements than was expected. This paper deals with reflection of measuring results on modernization principles of tram cars.
{"title":"Tracking system operating conditions of Zagreb's tram cars-a new view on technical requirements","authors":"Ž. Ivanović, B. Kuzmanovic","doi":"10.1109/ISIE.1999.797010","DOIUrl":"https://doi.org/10.1109/ISIE.1999.797010","url":null,"abstract":"Zagreb Electrical Tramway plans to modernize its tram fleet. The first step is defining the modernization technical requirements. Initial measurements of motor drive operating conditions were performed in selected traffic sections in Zagreb city. The results show a rather different way of defining the technical requirements than was expected. This paper deals with reflection of measuring results on modernization principles of tram cars.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121692075","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 : 1999-07-12DOI: 10.1109/ISIE.1999.801815
L. Ben‐Brahim, A. Gastli, M.A. Al-Hamadi
This paper describes a set of automatic tuning schemes for speed sensorless vector controlled induction motors. The importance of a self-commissioning inverter for sensorless drive systems is highlighted and a new tuning method of parameters needed for a sensorless drive system is proposed and explained. The tuning includes the estimation of the induction motor parameters used to estimate the speed and to control the motor. The proposed method is compared to recursive least-squares estimation (RLSE) which is conventionally used to identify the parameters of the motor.
{"title":"Auto-tuning for sensorless AC motor drive systems","authors":"L. Ben‐Brahim, A. Gastli, M.A. Al-Hamadi","doi":"10.1109/ISIE.1999.801815","DOIUrl":"https://doi.org/10.1109/ISIE.1999.801815","url":null,"abstract":"This paper describes a set of automatic tuning schemes for speed sensorless vector controlled induction motors. The importance of a self-commissioning inverter for sensorless drive systems is highlighted and a new tuning method of parameters needed for a sensorless drive system is proposed and explained. The tuning includes the estimation of the induction motor parameters used to estimate the speed and to control the motor. The proposed method is compared to recursive least-squares estimation (RLSE) which is conventionally used to identify the parameters of the motor.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124099198","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 : 1999-07-12DOI: 10.1109/ISIE.1999.796902
E. Bassi, F. Benzi, F. Moro, G. Buja
The paper presents two methodologies which are able to compensate for the disturbance forces produced in brushless AC linear motors. This force, while depending on a number of reasons, is mostly due to the cogging resulting from both the motor anisotropic reluctance and the edge effects. A short description of a linear motor drive is given and a model of the assembly is suggested. A series of laboratory tests are then presented in order to define the parameters of the system and to characterise the force disturbance. This force, which affects the motor trajectory path (speed and position), can be counteracted by the algorithms proposed. The first is based on a static feedforward compensation of the noise, implemented by reconstructing and compensating a disturbance with the same harmonic content derived from the measurements. A second technique is based on a closed loop regulator, which implements a state observer, also tuned on the basis of the laboratory tests. The results of simulation and comparison of the algorithms proposed both give encouraging results useful for their actual implementation.
{"title":"Force disturbance compensation for an AC brushless linear motor","authors":"E. Bassi, F. Benzi, F. Moro, G. Buja","doi":"10.1109/ISIE.1999.796902","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796902","url":null,"abstract":"The paper presents two methodologies which are able to compensate for the disturbance forces produced in brushless AC linear motors. This force, while depending on a number of reasons, is mostly due to the cogging resulting from both the motor anisotropic reluctance and the edge effects. A short description of a linear motor drive is given and a model of the assembly is suggested. A series of laboratory tests are then presented in order to define the parameters of the system and to characterise the force disturbance. This force, which affects the motor trajectory path (speed and position), can be counteracted by the algorithms proposed. The first is based on a static feedforward compensation of the noise, implemented by reconstructing and compensating a disturbance with the same harmonic content derived from the measurements. A second technique is based on a closed loop regulator, which implements a state observer, also tuned on the basis of the laboratory tests. The results of simulation and comparison of the algorithms proposed both give encouraging results useful for their actual implementation.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125767872","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 : 1999-07-12DOI: 10.1109/ISIE.1999.798666
V. Valouch
A few different power theories are presented and used in the control strategies of the shunt active filter in case of the unsymmetrical supply voltage system. The time responses of the currents, instantaneous powers and losses, obtained by the simulation, are shown and compared. Although for the symmetrical voltage system with only the fundamental harmonic, different power theories provide effectively the same results, those may differ substantially for unsymmetrical supply systems with harmonics. The results, summarised in the table, show that the applied power theories influence substantially the basic performance criteria: the shapes of the supply currents, instantaneous powers, and losses. With regard to the purpose of the use of a device for power quality improvement an appropriate control strategy must be implemented.
{"title":"Active filter control methods based on different power theories","authors":"V. Valouch","doi":"10.1109/ISIE.1999.798666","DOIUrl":"https://doi.org/10.1109/ISIE.1999.798666","url":null,"abstract":"A few different power theories are presented and used in the control strategies of the shunt active filter in case of the unsymmetrical supply voltage system. The time responses of the currents, instantaneous powers and losses, obtained by the simulation, are shown and compared. Although for the symmetrical voltage system with only the fundamental harmonic, different power theories provide effectively the same results, those may differ substantially for unsymmetrical supply systems with harmonics. The results, summarised in the table, show that the applied power theories influence substantially the basic performance criteria: the shapes of the supply currents, instantaneous powers, and losses. With regard to the purpose of the use of a device for power quality improvement an appropriate control strategy must be implemented.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"27 18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127930552","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 : 1999-07-12DOI: 10.1109/ISIE.1999.796880
S. Peresada, A. Tilli, A. Tonielli
In this paper a controller for doubly-fed induction motor is presented. It guarantees speed tracking and reactive power regulation at the stator side. A current-fed rotor is assumed and the speed measurement is required as feedback. An original approach is used to design the controller. It is based on the decomposition of the machine model in two coupled subsystems: the stator-flux and the speed subsystems. With the proposed solution, the controlled flux subsystem is exponentially stabilized independently of the speed behavior and the speed subsystem is asymptotically linearized and decoupled from the flux dynamics. The global asymptotic stability of the overall system is theoretically proven. Simulation results confirm the good quality of the proposed controller.
{"title":"Dynamic output feedback linearizing control of a doubly-fed induction motor","authors":"S. Peresada, A. Tilli, A. Tonielli","doi":"10.1109/ISIE.1999.796880","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796880","url":null,"abstract":"In this paper a controller for doubly-fed induction motor is presented. It guarantees speed tracking and reactive power regulation at the stator side. A current-fed rotor is assumed and the speed measurement is required as feedback. An original approach is used to design the controller. It is based on the decomposition of the machine model in two coupled subsystems: the stator-flux and the speed subsystems. With the proposed solution, the controlled flux subsystem is exponentially stabilized independently of the speed behavior and the speed subsystem is asymptotically linearized and decoupled from the flux dynamics. The global asymptotic stability of the overall system is theoretically proven. Simulation results confirm the good quality of the proposed controller.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127991402","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 : 1999-07-12DOI: 10.1109/ISIE.1999.796921
M. Kapus-Kolar
An algorithm is proposed for automated synthesis of protocols implementing coordination services for mobile objects. The distributed server might consist of an arbitrary number of components pairwise communicating over reliable FIFO channels. The required behavior of the components is derived given a specification of the expected service, i.e. interactions between individual service users and the server components to which they are currently attached. The adopted specification language is semantically close to Basic E-LOTOS.
{"title":"E-LOTOS-based synthesis of distributed coordinators for mobile objects","authors":"M. Kapus-Kolar","doi":"10.1109/ISIE.1999.796921","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796921","url":null,"abstract":"An algorithm is proposed for automated synthesis of protocols implementing coordination services for mobile objects. The distributed server might consist of an arbitrary number of components pairwise communicating over reliable FIFO channels. The required behavior of the components is derived given a specification of the expected service, i.e. interactions between individual service users and the server components to which they are currently attached. The adopted specification language is semantically close to Basic E-LOTOS.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"381 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115909348","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 : 1999-07-12DOI: 10.1109/ISIE.1999.801796
I. Nagy, J. Hamar, K.R. Jardan
The paper presents the CCM (continuous conduction mode) operation of the dual channel resonant DC-DC step down (buck) converter. However, as a result of certain limitations, sometimes the converter cannot be operated in CCM at all. The paper presents the mathematical analysis of CCM operation, explores the basic relations between input, output and control variables for the more general asymmetric operation and gives simplified solutions for symmetric operation. To verify the theory, simulation results are also presented together with a comparison between some relevant numeric values from calculations and simulations. Finally, the advantages and drawbacks of CCM operation are summarized.
{"title":"Dual channel DC-DC converter in continuous conduction mode","authors":"I. Nagy, J. Hamar, K.R. Jardan","doi":"10.1109/ISIE.1999.801796","DOIUrl":"https://doi.org/10.1109/ISIE.1999.801796","url":null,"abstract":"The paper presents the CCM (continuous conduction mode) operation of the dual channel resonant DC-DC step down (buck) converter. However, as a result of certain limitations, sometimes the converter cannot be operated in CCM at all. The paper presents the mathematical analysis of CCM operation, explores the basic relations between input, output and control variables for the more general asymmetric operation and gives simplified solutions for symmetric operation. To verify the theory, simulation results are also presented together with a comparison between some relevant numeric values from calculations and simulations. Finally, the advantages and drawbacks of CCM operation are summarized.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131978472","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 : 1999-07-12DOI: 10.1109/ISIE.1999.796926
S. Hong, T. Park
The fieldbus provides real-time communication among field devices in the manufacturing automation and process control systems. In this study, an experimental model of the Profibus-based manufacturing automation system is developed. The experimental model consists of two robots, two conveyor belts, NC machine, PLC, sensors and operator station. These machines are interconnected into the Profibus network and exchange their data through the services provided by FMS (Fieldbus Message Specification). The experimental model is used to measure the network-induced delay of variable and file data transmitted through FMS services. This study analyzes the network-induced delays at each sublayer of the Profibus protocol stack. The experimental results obtained from this study promote understanding the delay characteristics of the Profibus FMS.
{"title":"Experimental performance evaluation of Profibus-FMS in the manufacturing automation systems","authors":"S. Hong, T. Park","doi":"10.1109/ISIE.1999.796926","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796926","url":null,"abstract":"The fieldbus provides real-time communication among field devices in the manufacturing automation and process control systems. In this study, an experimental model of the Profibus-based manufacturing automation system is developed. The experimental model consists of two robots, two conveyor belts, NC machine, PLC, sensors and operator station. These machines are interconnected into the Profibus network and exchange their data through the services provided by FMS (Fieldbus Message Specification). The experimental model is used to measure the network-induced delay of variable and file data transmitted through FMS services. This study analyzes the network-induced delays at each sublayer of the Profibus protocol stack. The experimental results obtained from this study promote understanding the delay characteristics of the Profibus FMS.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130149478","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 : 1999-07-12DOI: 10.1109/ISIE.1999.801754
S. Sáez, J. Vila, A. Crespo, A. Garcı́a
The problem of jointly scheduling both hard deadline periodic tasks and soft aperiodic tasks has been the subject of considerable research in real-time systems. One of the most widely accepted solutions for this problem are slack stealing algorithms. However, these algorithms are rather impractical, since they all imply a considerable scheduler overhead. This paper faces the overhead problem by introducing a complete hardware architecture that implements slack stealing in hardware using an optimal algorithm that has been completely redesigned to perform efficiently in hardware. The proposed solution is a circuit that behaves as a kind of sophisticated interrupt controller that takes the task workload and the interrupts as inputs, and provides an output to inform the CPU which is the highest priority task. From the point of view of hardware design, the algorithm involves two main problems: first, to select the highest priority task at every moment and, second, to locate a set of slack gaps in a real-time computation. Locating slack gaps in a real-time computation is a problem that requires to "look forward in time" into the forecast schedule of a given workload. This paper presents a novel architecture that shows how to solve this problem in an efficient way using an event-driven simulation. A timing analysis of the proposed design is also presented.
{"title":"A hardware scheduler for complex real-time systems","authors":"S. Sáez, J. Vila, A. Crespo, A. Garcı́a","doi":"10.1109/ISIE.1999.801754","DOIUrl":"https://doi.org/10.1109/ISIE.1999.801754","url":null,"abstract":"The problem of jointly scheduling both hard deadline periodic tasks and soft aperiodic tasks has been the subject of considerable research in real-time systems. One of the most widely accepted solutions for this problem are slack stealing algorithms. However, these algorithms are rather impractical, since they all imply a considerable scheduler overhead. This paper faces the overhead problem by introducing a complete hardware architecture that implements slack stealing in hardware using an optimal algorithm that has been completely redesigned to perform efficiently in hardware. The proposed solution is a circuit that behaves as a kind of sophisticated interrupt controller that takes the task workload and the interrupts as inputs, and provides an output to inform the CPU which is the highest priority task. From the point of view of hardware design, the algorithm involves two main problems: first, to select the highest priority task at every moment and, second, to locate a set of slack gaps in a real-time computation. Locating slack gaps in a real-time computation is a problem that requires to \"look forward in time\" into the forecast schedule of a given workload. This paper presents a novel architecture that shows how to solve this problem in an efficient way using an event-driven simulation. A timing analysis of the proposed design is also presented.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134201976","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 : 1999-07-12DOI: 10.1109/ISIE.1999.796785
Pin-Lin Liu, Ho-Lung Hung
The stability of a bilinear system with stated delay and saturating actuator is discussed. Delay-dependent sufficient conditions for the uniform asymptotic stability of the closed-loop systems via a memoryless static state feedback controller is developed. The matrix measure and comparison theorem are employed to investigate the problem. The results obtained omit solving the Lyapunov function or Riccati equation and is less conservative than the delay-dependent criterion for the same example when delay is small. The authors' result is demonstrated by an illustrate example.
{"title":"Stability for bilinear time-delay systems with saturating actuators","authors":"Pin-Lin Liu, Ho-Lung Hung","doi":"10.1109/ISIE.1999.796785","DOIUrl":"https://doi.org/10.1109/ISIE.1999.796785","url":null,"abstract":"The stability of a bilinear system with stated delay and saturating actuator is discussed. Delay-dependent sufficient conditions for the uniform asymptotic stability of the closed-loop systems via a memoryless static state feedback controller is developed. The matrix measure and comparison theorem are employed to investigate the problem. The results obtained omit solving the Lyapunov function or Riccati equation and is less conservative than the delay-dependent criterion for the same example when delay is small. The authors' result is demonstrated by an illustrate example.","PeriodicalId":227402,"journal":{"name":"ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134233365","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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