Pub Date : 2014-12-01DOI: 10.1109/STA.2014.7086680
Intan Najiha Binti Mohd Shukri, Bin Ibrahim Rosdiazli
Control valves are important components in control systems, which play a crucial role in ensuring plants run efficiently. The effect of valve failure is not only major production loss but also high maintenance cost. In a plant, a common technique used for valve maintenance is based on the valve condition replacement at fixed time interval. Most of the time the replacement only happens after the valve has obvious failure and during the plant shutdown. Common case of failure in valves is the internal valve seat leakage. The valve leak tightness test is conducted to detect the occurrence of internal leak in valve, however it is costly and time consuming to isolate the valve from the site and dismantling the valve. Significant money can be saved if leak in the valve can be detected early and if the test can be conducted online without having to isolate the equipment from the site. Therefore, this paper aims to study the effectiveness of Acoustic Emission technique in detecting early leakage in control valve on-site with fully closed position. The paper discusses a method based on different types of statistical analysis parameters such as variance, standard deviation, max amplitude on frequency domain analysis of AE signals to distinguish between healthy and unhealthy control valves. A real time AE measurement system is developed and tested. The acquired AE signatures are processed and analyzed using MATLAB.
{"title":"Implementation of Acoustic Emission technique in early detection of control valve seat leakage","authors":"Intan Najiha Binti Mohd Shukri, Bin Ibrahim Rosdiazli","doi":"10.1109/STA.2014.7086680","DOIUrl":"https://doi.org/10.1109/STA.2014.7086680","url":null,"abstract":"Control valves are important components in control systems, which play a crucial role in ensuring plants run efficiently. The effect of valve failure is not only major production loss but also high maintenance cost. In a plant, a common technique used for valve maintenance is based on the valve condition replacement at fixed time interval. Most of the time the replacement only happens after the valve has obvious failure and during the plant shutdown. Common case of failure in valves is the internal valve seat leakage. The valve leak tightness test is conducted to detect the occurrence of internal leak in valve, however it is costly and time consuming to isolate the valve from the site and dismantling the valve. Significant money can be saved if leak in the valve can be detected early and if the test can be conducted online without having to isolate the equipment from the site. Therefore, this paper aims to study the effectiveness of Acoustic Emission technique in detecting early leakage in control valve on-site with fully closed position. The paper discusses a method based on different types of statistical analysis parameters such as variance, standard deviation, max amplitude on frequency domain analysis of AE signals to distinguish between healthy and unhealthy control valves. A real time AE measurement system is developed and tested. The acquired AE signatures are processed and analyzed using MATLAB.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128573889","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 : 2014-12-01DOI: 10.1109/STA.2014.7086758
Amel Barhoumi, T. Ladhari, F. M'sahli
This paper addresses the estimation of non-measured states in waste water treatment process. Specifically, the extended Kalman filter has been investigated for this class of nonlinear systems. Of particular interest, it is shown that extended Kalman filter can be applied to estimate the states in our system and provide good estimations for the non-measurable states.
{"title":"The extended Kalman filter for nonlinear system: Application to system of waste water treatment","authors":"Amel Barhoumi, T. Ladhari, F. M'sahli","doi":"10.1109/STA.2014.7086758","DOIUrl":"https://doi.org/10.1109/STA.2014.7086758","url":null,"abstract":"This paper addresses the estimation of non-measured states in waste water treatment process. Specifically, the extended Kalman filter has been investigated for this class of nonlinear systems. Of particular interest, it is shown that extended Kalman filter can be applied to estimate the states in our system and provide good estimations for the non-measurable states.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129253351","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 : 2014-12-01DOI: 10.1109/STA.2014.7086773
Omnia Mezghani, M. Abdellaoui
In this paper, we focus on maximizing network lifetime of a Wireless Sensors Network (WSN) using mobile base station. This work is based on the modified LEACH protocol to develop our algorithm which supports node mobility and improves network lifetime. We consider a heterogeneous WSN which consists of a large number of sensor nodes, a few static cluster heads (CH) and a mobile Base Station (BS). Each sensor node periodically sends sensed event packets to its nearest CH. The CH should found an itinerary to send these event packets to the mobile BS. To show that the proposed approach achieves the required reliability and also maximize the network lifetime, we compare this protocol with an algorithm dedicated to a network formed by fixed nodes only. Simulation results show that the proposed mobile multi-hop algorithm, based on adaptive clustering protocol, effectively produces optimal energy consumption for the wireless sensors network and improves the network lifetime compared to other approaches.
{"title":"Improving network lifetime with mobile LEACH protocol for Wireless Sensors Network","authors":"Omnia Mezghani, M. Abdellaoui","doi":"10.1109/STA.2014.7086773","DOIUrl":"https://doi.org/10.1109/STA.2014.7086773","url":null,"abstract":"In this paper, we focus on maximizing network lifetime of a Wireless Sensors Network (WSN) using mobile base station. This work is based on the modified LEACH protocol to develop our algorithm which supports node mobility and improves network lifetime. We consider a heterogeneous WSN which consists of a large number of sensor nodes, a few static cluster heads (CH) and a mobile Base Station (BS). Each sensor node periodically sends sensed event packets to its nearest CH. The CH should found an itinerary to send these event packets to the mobile BS. To show that the proposed approach achieves the required reliability and also maximize the network lifetime, we compare this protocol with an algorithm dedicated to a network formed by fixed nodes only. Simulation results show that the proposed mobile multi-hop algorithm, based on adaptive clustering protocol, effectively produces optimal energy consumption for the wireless sensors network and improves the network lifetime compared to other approaches.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128368860","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 : 2014-12-01DOI: 10.1109/STA.2014.7086804
W. Rohouma
Simulation of Ground Power Supply Unit is very important to test the performance and effectiveness of the systems under different scenarios. It can provide a safe and cheaper test bed to operate and evaluate the performance of the system before realizing it in the physical world. In this paper the effect of switching frequency on the performance of a ground power supply unit based matrix converter is studied. Simulation results from a 7.5KVA converter presented at different switching frequencies.
{"title":"Effect of switching frequency on the performance of Ground Power Supply Unit","authors":"W. Rohouma","doi":"10.1109/STA.2014.7086804","DOIUrl":"https://doi.org/10.1109/STA.2014.7086804","url":null,"abstract":"Simulation of Ground Power Supply Unit is very important to test the performance and effectiveness of the systems under different scenarios. It can provide a safe and cheaper test bed to operate and evaluate the performance of the system before realizing it in the physical world. In this paper the effect of switching frequency on the performance of a ground power supply unit based matrix converter is studied. Simulation results from a 7.5KVA converter presented at different switching frequencies.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"44 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132365293","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 : 2014-12-01DOI: 10.1109/STA.2014.7086690
K. Baazouzi, A. Bensalah, S. Drid
The major problem of controlling a multi-variable electrical system comes mainly from the lack of information on its structure, which was supposed to always linear, a change in unexpected state may cause system instability, hence the requirement development of a new control structure incorporating nonlinear effects and time-varying phenomena while respecting the desired specifications on their stabilities. A new control scheme for speed induction motors is proposed in the present paper, called "passivity based control (PBC) on the principle of exchange control energy via state feedback was presented it allows to work in several areas. A port-controlled Hamiltonian (PCH) model of the induction motor is deduced to make the interconnection and damping of energy explicit on the scheme. The proposed controller is validated under computational simulations MATLAB.
{"title":"The PBC technical to control the induction motor","authors":"K. Baazouzi, A. Bensalah, S. Drid","doi":"10.1109/STA.2014.7086690","DOIUrl":"https://doi.org/10.1109/STA.2014.7086690","url":null,"abstract":"The major problem of controlling a multi-variable electrical system comes mainly from the lack of information on its structure, which was supposed to always linear, a change in unexpected state may cause system instability, hence the requirement development of a new control structure incorporating nonlinear effects and time-varying phenomena while respecting the desired specifications on their stabilities. A new control scheme for speed induction motors is proposed in the present paper, called \"passivity based control (PBC) on the principle of exchange control energy via state feedback was presented it allows to work in several areas. A port-controlled Hamiltonian (PCH) model of the induction motor is deduced to make the interconnection and damping of energy explicit on the scheme. The proposed controller is validated under computational simulations MATLAB.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132390578","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 : 2014-12-01DOI: 10.1109/STA.2014.7086667
Yassine Beddiaf, L. Chrifi-Alaoui, F. Zidani, S. Drid
This paper presents an improved method of rotor flux angle θs estimation for sensorless indirect oriented field control of induction motors based on a phase locked loop (PLL). A PLL is used to estimate the rotor flux angle taking account only the reference speed. The Extended Kalman Filter (EKF) is used to estimate speed and rotor flux. Extensive simulation and experimental tests confirm the effectiveness of the proposed approach.
{"title":"Modified speed sensorless indirect field-oriented control of induction motor using PLL","authors":"Yassine Beddiaf, L. Chrifi-Alaoui, F. Zidani, S. Drid","doi":"10.1109/STA.2014.7086667","DOIUrl":"https://doi.org/10.1109/STA.2014.7086667","url":null,"abstract":"This paper presents an improved method of rotor flux angle θs estimation for sensorless indirect oriented field control of induction motors based on a phase locked loop (PLL). A PLL is used to estimate the rotor flux angle taking account only the reference speed. The Extended Kalman Filter (EKF) is used to estimate speed and rotor flux. Extensive simulation and experimental tests confirm the effectiveness of the proposed approach.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131792358","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 : 2014-12-01DOI: 10.1109/STA.2014.7086678
R. Laajimi, M. Masmoudi
Modulator is one of the most significant building-blocks of analog Very Large Scale Integration (VLSI) used for Sigma-Delta Analog to Digital Converter (ADC). For high-performance analog circuit applications area and power consumption are the most important parameters to determine the performance of the modulator. Our design consumes only 1.16 mW of power at a supply voltage of 3V. Eventually the core chip size of the modulator without bonding pads is 76 μm × 110 μm by using the AMS 0.35 μm CMOS technology.
{"title":"High-performance 8-bit modulator used for Sigma-Delta Analog to Digital Converter","authors":"R. Laajimi, M. Masmoudi","doi":"10.1109/STA.2014.7086678","DOIUrl":"https://doi.org/10.1109/STA.2014.7086678","url":null,"abstract":"Modulator is one of the most significant building-blocks of analog Very Large Scale Integration (VLSI) used for Sigma-Delta Analog to Digital Converter (ADC). For high-performance analog circuit applications area and power consumption are the most important parameters to determine the performance of the modulator. Our design consumes only 1.16 mW of power at a supply voltage of 3V. Eventually the core chip size of the modulator without bonding pads is 76 μm × 110 μm by using the AMS 0.35 μm CMOS technology.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128814223","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 : 2014-12-01DOI: 10.1109/STA.2014.7086684
I. Benlaloui, S. Drid, L. Chrifi-Alaoui, D. Benoudjit
This paper deals with a Sensorless backstepping controller. In order to improve the robustness of the proposed approach, we estimate the rotor flux components and rotor speed of the induction motor using a sliding mode observer. The backstepping technique is appropriate for such as non linear system. The overall system stability is proved through appropriate Lyapunov functions. Experimental result is presented to prove the effectiveness and validity of the proposed Sensorless control.
{"title":"Sensorless speed backstepping control of induction motor based on sliding mode observer: Experimental results","authors":"I. Benlaloui, S. Drid, L. Chrifi-Alaoui, D. Benoudjit","doi":"10.1109/STA.2014.7086684","DOIUrl":"https://doi.org/10.1109/STA.2014.7086684","url":null,"abstract":"This paper deals with a Sensorless backstepping controller. In order to improve the robustness of the proposed approach, we estimate the rotor flux components and rotor speed of the induction motor using a sliding mode observer. The backstepping technique is appropriate for such as non linear system. The overall system stability is proved through appropriate Lyapunov functions. Experimental result is presented to prove the effectiveness and validity of the proposed Sensorless control.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123876396","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 : 2014-12-01DOI: 10.1109/STA.2014.7086726
O. Feki, T. Grandpierre, M. Akil, N. Masmoudi, Y. Sorel
Real-time embedded applications require high computational performances. Mixed Architectures which contain programmable and reconfigurable parts may be the solution to meet this computational requirement. FPGA vendors start to sell such mixed architectures. But the implementation of an algorithm on these architectures lead to a huge number of possible implementations that had to be explored in order to reach real-time and resource minimization. Therefore, the use of a rapid prototyping methodology is required to automate the partitioning task and the code generation in order to reduce time to market. Consequently there is a great need for dedicated tools, covering simultaneously both programmable and reconfigurable components in a unified framework. Architecture Algorithm Adequation (AAA) is one of those rapid prototyping methodologies implemented in two differents tools targeting programmables components on the one hand, and reconfigurable components on the other hand. Since AAA does not support mixed architectures, this paper presents an extension of this methodology, and a new tool that couples SynDEx for programmable components and SynDEx-IC for reconfigurable components. This tool is called SynDEx-Mix.
{"title":"SynDEx-Mix: A hardware/software partitioning CAD tool","authors":"O. Feki, T. Grandpierre, M. Akil, N. Masmoudi, Y. Sorel","doi":"10.1109/STA.2014.7086726","DOIUrl":"https://doi.org/10.1109/STA.2014.7086726","url":null,"abstract":"Real-time embedded applications require high computational performances. Mixed Architectures which contain programmable and reconfigurable parts may be the solution to meet this computational requirement. FPGA vendors start to sell such mixed architectures. But the implementation of an algorithm on these architectures lead to a huge number of possible implementations that had to be explored in order to reach real-time and resource minimization. Therefore, the use of a rapid prototyping methodology is required to automate the partitioning task and the code generation in order to reduce time to market. Consequently there is a great need for dedicated tools, covering simultaneously both programmable and reconfigurable components in a unified framework. Architecture Algorithm Adequation (AAA) is one of those rapid prototyping methodologies implemented in two differents tools targeting programmables components on the one hand, and reconfigurable components on the other hand. Since AAA does not support mixed architectures, this paper presents an extension of this methodology, and a new tool that couples SynDEx for programmable components and SynDEx-IC for reconfigurable components. This tool is called SynDEx-Mix.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129015289","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 : 2014-12-01DOI: 10.1109/STA.2014.7086718
A. Alouane, A. Ben Rhouma, Adel Kheder
The cost-effectiveness and the reliability in hybrid and electric propulsion system can be achieved by the use of reduced structure inverters. Within this trend, the paper develops a new DTC strategy dedicated to a reduced delta inverter “three-switch three phase inverter (TSTPI)” fed induction motor drive. A special attention is paid to the design of the vector selection table in an attempt to reduced ripple of the electromagnetic torque. Due to a particular rapidity, a great flexibility and a high integration of the FPGA board, we are interested in this paper to generate a XSG code in order to implement the DTC strategy on a Xilinx virtex5 board.
{"title":"FPGA implementation of a DTC strategy dedicated to three-switch three-phase inverter-fed induction motor drives","authors":"A. Alouane, A. Ben Rhouma, Adel Kheder","doi":"10.1109/STA.2014.7086718","DOIUrl":"https://doi.org/10.1109/STA.2014.7086718","url":null,"abstract":"The cost-effectiveness and the reliability in hybrid and electric propulsion system can be achieved by the use of reduced structure inverters. Within this trend, the paper develops a new DTC strategy dedicated to a reduced delta inverter “three-switch three phase inverter (TSTPI)” fed induction motor drive. A special attention is paid to the design of the vector selection table in an attempt to reduced ripple of the electromagnetic torque. Due to a particular rapidity, a great flexibility and a high integration of the FPGA board, we are interested in this paper to generate a XSG code in order to implement the DTC strategy on a Xilinx virtex5 board.","PeriodicalId":125957,"journal":{"name":"2014 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128944898","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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