Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292538
M. Johnny, V. Vakili, M. Sheikhan
In this paper, the problem of estimating the direction of arrival of signals of which some may be perfectly correlated is considered. This method can be applied in the situation that the non-Gaussian independent and coherent signals coexist with unknown Gaussian noise. In this method at first via mappings, the virtual uniform linear array (ULA) and also the shifted versions of this virtual ULA by assuming that all the DOAs are located in one section are constructed. In order to avoid coloring the noise because of these mappings we use a cumulant matrix instead of a covariance ones. In this method since we construct all the subarrays virtually for detection of coherent signals we do not need the array with regular configuration. The advantages of this method are: increasing the array aperture, having the ability to find the DOAs with fewer sensors and also avoiding the coupling between sensors as much as possible in contrast to conventional spatial smoothing.
{"title":"Direction finding in multipath environment with arbitrary array","authors":"M. Johnny, V. Vakili, M. Sheikhan","doi":"10.1109/IRANIANCEE.2012.6292538","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292538","url":null,"abstract":"In this paper, the problem of estimating the direction of arrival of signals of which some may be perfectly correlated is considered. This method can be applied in the situation that the non-Gaussian independent and coherent signals coexist with unknown Gaussian noise. In this method at first via mappings, the virtual uniform linear array (ULA) and also the shifted versions of this virtual ULA by assuming that all the DOAs are located in one section are constructed. In order to avoid coloring the noise because of these mappings we use a cumulant matrix instead of a covariance ones. In this method since we construct all the subarrays virtually for detection of coherent signals we do not need the array with regular configuration. The advantages of this method are: increasing the array aperture, having the ability to find the DOAs with fewer sensors and also avoiding the coupling between sensors as much as possible in contrast to conventional spatial smoothing.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126792951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292488
M. Hasanzadeh, M. Jahed-Motlagh, M. Kazemi
In this paper, generalized extended state observer is implemented to the load-frequency control of a multi-area power system. By using this observer, there is no need to have an accurate dynamic model of the system and thus, leads to a more robust performance against the uncertainties of the system parameters and disturbances in comparison with conventional load-frequency control methods. Moreover, the higher order disturbances rather than just step disturbances can be rejected by the proposed method, because of estimating the both disturbance and its derivative. A generalized disturbance signal is defined for each area. It consists of unmodeled dynamics of the system, external disturbances, and the interactions of the other areas. In the proposed control strategy, the generalized disturbance is estimated using local input and output data by a local state observer. Then, the estimation of generalized disturbance is used in a local state feedback controller to reject it and track the related references. The simulation results show the effectiveness of the proposed method.
{"title":"Decentralized disturbance rejection control of multi-area power systems using generalized extended state observer","authors":"M. Hasanzadeh, M. Jahed-Motlagh, M. Kazemi","doi":"10.1109/IRANIANCEE.2012.6292488","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292488","url":null,"abstract":"In this paper, generalized extended state observer is implemented to the load-frequency control of a multi-area power system. By using this observer, there is no need to have an accurate dynamic model of the system and thus, leads to a more robust performance against the uncertainties of the system parameters and disturbances in comparison with conventional load-frequency control methods. Moreover, the higher order disturbances rather than just step disturbances can be rejected by the proposed method, because of estimating the both disturbance and its derivative. A generalized disturbance signal is defined for each area. It consists of unmodeled dynamics of the system, external disturbances, and the interactions of the other areas. In the proposed control strategy, the generalized disturbance is estimated using local input and output data by a local state observer. Then, the estimation of generalized disturbance is used in a local state feedback controller to reject it and track the related references. The simulation results show the effectiveness of the proposed method.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123852388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292323
M. Khani, S. Mousavi, A. Hodaei, A. Goodarzi, M. H. Majlesara
Because of the importance of ohmic contact in semiconductor devices, in this study, AuGeNi thin films were deposited by thermal evaporation technique at substrate deposition temperature from 80 °C to 230 °C and annealed at the same conditions. Then contact resistivity and surface morphology was investigated. Surface morphology was investigated by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The compositions of different zones have been determined by use of x- ray Energy-Dispersive Spectrum (EDS) analysis. Contact resistivity of the samples is measured using a conventional Transmission Line model (TLM) method. So from the I-V curves and the other mentioned analysis results, it is concluded that the sample which was deposited at 180°C indicates the best electrical and morphological properties.
{"title":"Transmission line model (TLM) method study of nanostructural AuGeNi/n-GaAs ohmic contact layer for different substrate deposition temperature","authors":"M. Khani, S. Mousavi, A. Hodaei, A. Goodarzi, M. H. Majlesara","doi":"10.1109/IRANIANCEE.2012.6292323","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292323","url":null,"abstract":"Because of the importance of ohmic contact in semiconductor devices, in this study, AuGeNi thin films were deposited by thermal evaporation technique at substrate deposition temperature from 80 °C to 230 °C and annealed at the same conditions. Then contact resistivity and surface morphology was investigated. Surface morphology was investigated by Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The compositions of different zones have been determined by use of x- ray Energy-Dispersive Spectrum (EDS) analysis. Contact resistivity of the samples is measured using a conventional Transmission Line model (TLM) method. So from the I-V curves and the other mentioned analysis results, it is concluded that the sample which was deposited at 180°C indicates the best electrical and morphological properties.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123688963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292328
Abolfazl Bijari, S. Keshmiri, A. Leenaphet, W. Wanburi, N. Chomnawang, C. Sriphung, R. Phatthanakun
This paper presents design and fabrication process of a bulk-mode ring resonator in x-ray LIGA technology. The fabrication process is used to achieve a high aspect ratio of 25 with 3-4 μm gap spacing. Rigid graphite serves as a low-cost primary substrate and plating base of nickel as structural material. Moreover, low-cost x-ray mask is developed based on silver electroplating procedure. Through the combination of x-ray and UV lithographies, the fabrication process needs only three lithography steps with one x-ray mask and two Mylar masks. The resonant behavior of the fabricated resonator is characterized as a function of the bias voltage using a fully differential drive and sense interface circuit. The results show that, the quality factor of the fabricated resonator in the extensional wine-glass resonant mode is about 156170 using a DC-bias voltage of 90 V at a resonance frequency of 9.37 MHz and vacuum pressure of 0.10 mbar.
{"title":"A novel low-cost fabrication process for bulk-mode resonators in X-ray LIGA technology","authors":"Abolfazl Bijari, S. Keshmiri, A. Leenaphet, W. Wanburi, N. Chomnawang, C. Sriphung, R. Phatthanakun","doi":"10.1109/IRANIANCEE.2012.6292328","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292328","url":null,"abstract":"This paper presents design and fabrication process of a bulk-mode ring resonator in x-ray LIGA technology. The fabrication process is used to achieve a high aspect ratio of 25 with 3-4 μm gap spacing. Rigid graphite serves as a low-cost primary substrate and plating base of nickel as structural material. Moreover, low-cost x-ray mask is developed based on silver electroplating procedure. Through the combination of x-ray and UV lithographies, the fabrication process needs only three lithography steps with one x-ray mask and two Mylar masks. The resonant behavior of the fabricated resonator is characterized as a function of the bias voltage using a fully differential drive and sense interface circuit. The results show that, the quality factor of the fabricated resonator in the extensional wine-glass resonant mode is about 156170 using a DC-bias voltage of 90 V at a resonance frequency of 9.37 MHz and vacuum pressure of 0.10 mbar.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121225099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292577
B. Solhjoo, M. Tinati
This paper presents a new localization algorithm in Wireless Sensor Networks. The RSSI (Received Signal Strength Indicator) is a localization method which provides an inexpensive and accurate solution for localization. However the time and location based fluctuations on the RSSI values and improper models cause a considerable localization error in the real applications. Most of the RSSI models suppose the radio range to be circular. In the proposed method the algorithm tries to find a relation between RSSI and distance for each anchor node in each direction adaptively and produce a noncircular model. The simulation results show that this method can reduce amount of the localization error considerably. Also unlike to the range free methods the proposed method can work properly in the low node densities.
提出了一种新的无线传感器网络定位算法。RSSI (Received Signal Strength Indicator，接收信号强度指示器)是一种定位方法，它提供了一种廉价而准确的定位解决方案。然而，在实际应用中，由于RSSI值在时间和位置上的波动以及模型的不合理，造成了相当大的定位误差。大多数RSSI模型假设无线电范围是圆形的。在该方法中，该算法试图自适应地寻找每个锚节点在每个方向上的RSSI与距离之间的关系，并产生非圆模型。仿真结果表明，该方法能显著降低定位误差。与无范围方法不同，该方法可以在低节点密度下正常工作。
{"title":"An adaptive environmental modeling localization method in Wireless Sensor Networks","authors":"B. Solhjoo, M. Tinati","doi":"10.1109/IRANIANCEE.2012.6292577","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292577","url":null,"abstract":"This paper presents a new localization algorithm in Wireless Sensor Networks. The RSSI (Received Signal Strength Indicator) is a localization method which provides an inexpensive and accurate solution for localization. However the time and location based fluctuations on the RSSI values and improper models cause a considerable localization error in the real applications. Most of the RSSI models suppose the radio range to be circular. In the proposed method the algorithm tries to find a relation between RSSI and distance for each anchor node in each direction adaptively and produce a noncircular model. The simulation results show that this method can reduce amount of the localization error considerably. Also unlike to the range free methods the proposed method can work properly in the low node densities.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114071260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292544
S. Ghaeminejad, A. Aghagolzadeh, Hadi Seyedarabi
Multisensory fusion has become an area of intense research activity in the past few years. The goal of this paper is to present a technique for fusing infrared and visible videos. In this technique we propose a fusion method that quickly fuses infrared and visible frames and gives a better performance. This is done by first decomposing the inputs using DWT and extracting two maps (resulted from Choose Max rule) from approximation sub frames and then fusing detail subframes according to these maps. After being compared to some of the popular fusion methods, the experimental results demonstrate that not only does this proposed method have a superior fusion performance, it can also be easily implemented in visual sensor networks in which speed and simplicity are of critical importance.
{"title":"Fusion of visual and infrared signals in visual sensor network for night vision","authors":"S. Ghaeminejad, A. Aghagolzadeh, Hadi Seyedarabi","doi":"10.1109/IRANIANCEE.2012.6292544","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292544","url":null,"abstract":"Multisensory fusion has become an area of intense research activity in the past few years. The goal of this paper is to present a technique for fusing infrared and visible videos. In this technique we propose a fusion method that quickly fuses infrared and visible frames and gives a better performance. This is done by first decomposing the inputs using DWT and extracting two maps (resulted from Choose Max rule) from approximation sub frames and then fusing detail subframes according to these maps. After being compared to some of the popular fusion methods, the experimental results demonstrate that not only does this proposed method have a superior fusion performance, it can also be easily implemented in visual sensor networks in which speed and simplicity are of critical importance.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116375403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292412
A. Solat, A. Deihimi
This paper proposes a novel scheme to improve distance protection of compensated transmission lines with Thyristor Controlled Series Capasitor (TCSC). The method uses the type of dynamic feed-forward neural networks called Time Delayed Neural Network (TDNN) to estimate instantaneous values of the voltage across TCSC and then compensates it from the relay voltage signal to mitigate its effects on the measured impedance by distance relays. This technique is simple and accurate and requires only local current at the relay bus. Extensive testing in detail using MATLAB demonstrate that this method is well suited for implementating in a distance relay to improve the reach measurement accurately and effectively.
{"title":"A novel scheme for distance protection of series compensated transmission lines with TCSC using artificial neural networks","authors":"A. Solat, A. Deihimi","doi":"10.1109/IRANIANCEE.2012.6292412","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292412","url":null,"abstract":"This paper proposes a novel scheme to improve distance protection of compensated transmission lines with Thyristor Controlled Series Capasitor (TCSC). The method uses the type of dynamic feed-forward neural networks called Time Delayed Neural Network (TDNN) to estimate instantaneous values of the voltage across TCSC and then compensates it from the relay voltage signal to mitigate its effects on the measured impedance by distance relays. This technique is simple and accurate and requires only local current at the relay bus. Extensive testing in detail using MATLAB demonstrate that this method is well suited for implementating in a distance relay to improve the reach measurement accurately and effectively.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121674524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292325
A. Nikfarjam, M. Darvishi
In this work we have synthesized bare and doped CdS nanoparticles and studied luminescence properties of these particles as an important II-VI semiconductor. The thermochemical method is used for synthesis of these nanoparticles. Thiols are usually used as the capping agent to prevent further growth. Na2S2O3 was used as the sulfur precursor, 3CdSO4.8H2O as the Cadmium precursor, Thioglycolic acid (TGA) as capping agent and Mn(NO3)2.4H2O as Manganese doping precursor in thermochemical and room temperature growth. The application of TGA as capping agent instead of TG was studied as a novel idea in this research and was used practically in the synthesis of semiconductor nanoparticles. Using this process resulted in particles with sizes between 3-7nm. Several samples were synthesized and characterized under various conditions such as variation of Mn ions doping ratio, different temperatures, and different TGA concentrations. Synthesis of CdS nanoparticles with large Mn ions concentration resulted in decrement of their luminescence. In other words luminescence of nanoparticles was increased by decreasing Mn:Cd doping ratio. In this work synthesized nanoparticles under different doping ratios, and two samples which had the best results were Mn:Cd=1:80 and Mn:Cd=1:160 respectively. The particles growth under various temperatures indicated that decreasing temperature resulted in small particles, but their luminescence intensity fell down because of dominance of Mn emission in low temperatures. Also the results of particles growth under various TGA concentrations indicate the decrement of particles size distribution with increase of TGA concentration.
{"title":"Fabrication of high luminescent Mn doped CdS semiconductor nanoparticles","authors":"A. Nikfarjam, M. Darvishi","doi":"10.1109/IRANIANCEE.2012.6292325","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292325","url":null,"abstract":"In this work we have synthesized bare and doped CdS nanoparticles and studied luminescence properties of these particles as an important II-VI semiconductor. The thermochemical method is used for synthesis of these nanoparticles. Thiols are usually used as the capping agent to prevent further growth. Na2S2O3 was used as the sulfur precursor, 3CdSO4.8H2O as the Cadmium precursor, Thioglycolic acid (TGA) as capping agent and Mn(NO3)2.4H2O as Manganese doping precursor in thermochemical and room temperature growth. The application of TGA as capping agent instead of TG was studied as a novel idea in this research and was used practically in the synthesis of semiconductor nanoparticles. Using this process resulted in particles with sizes between 3-7nm. Several samples were synthesized and characterized under various conditions such as variation of Mn ions doping ratio, different temperatures, and different TGA concentrations. Synthesis of CdS nanoparticles with large Mn ions concentration resulted in decrement of their luminescence. In other words luminescence of nanoparticles was increased by decreasing Mn:Cd doping ratio. In this work synthesized nanoparticles under different doping ratios, and two samples which had the best results were Mn:Cd=1:80 and Mn:Cd=1:160 respectively. The particles growth under various temperatures indicated that decreasing temperature resulted in small particles, but their luminescence intensity fell down because of dominance of Mn emission in low temperatures. Also the results of particles growth under various TGA concentrations indicate the decrement of particles size distribution with increase of TGA concentration.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124378220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292482
M. Ghorbani, A. Banazadeh
In This paper detailed frequency-domain system identification method is applied to identify steering dynamics of a naval coastal patrol vessel using a data analysis software tool, called CIFER. Advanced features such as Chirp-Z transform and composite windowing techniques are used to extract high quality frequency responses. An accurate, linear and robust transfer function models are derived for yaw and roll dynamics of the vessel. In addition, to evaluate the accuracy of the identified model, time-domain responses from a 45-45 zig-zag test are compared with the responses predicted by the identified model. The model shows excellent predictive capability that is well suited for simulation applications as well as control design.
{"title":"A comprehensive frequency domain identification of a coastal p atrol vessel","authors":"M. Ghorbani, A. Banazadeh","doi":"10.1109/IRANIANCEE.2012.6292482","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292482","url":null,"abstract":"In This paper detailed frequency-domain system identification method is applied to identify steering dynamics of a naval coastal patrol vessel using a data analysis software tool, called CIFER. Advanced features such as Chirp-Z transform and composite windowing techniques are used to extract high quality frequency responses. An accurate, linear and robust transfer function models are derived for yaw and roll dynamics of the vessel. In addition, to evaluate the accuracy of the identified model, time-domain responses from a 45-45 zig-zag test are compared with the responses predicted by the identified model. The model shows excellent predictive capability that is well suited for simulation applications as well as control design.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128015564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-15DOI: 10.1109/IRANIANCEE.2012.6292429
D. Nazari, M. Abadi, M. Khooban, A. Alfi, K. Beyki
Many articles associated with glucose-insulin control have been divulged in the last decades, and in these articles frequently supposed that all the system state variables are accessible for feedback. The states like blood glucose and blood insulin are easy to measure, but the measurement of other states such as remote compartment insulin is difficult. This paper proposes an optimized nonlinear Luenberger observer using with the aid of a heuristic algorithm namely Particle Swarm Optimization with Linearly Decreasing Weight (LDW-PSO) for the three-state minimal nonlinear Bergman model. The goal of this optimization is the best recovery of invalid states that are inaccessible or prohibitive to be recovered straightly from the system outputs. The proposed method is a general technique such that for each control input and each disturbance input, one can design an optimal Luenberger observer whereas all unavailable states are appropriately reconstructed. Numerical simulations demonstrate the feasibility of proposed approach.
{"title":"Design of optimized reduced order observer for glucose control with intelligent methods","authors":"D. Nazari, M. Abadi, M. Khooban, A. Alfi, K. Beyki","doi":"10.1109/IRANIANCEE.2012.6292429","DOIUrl":"https://doi.org/10.1109/IRANIANCEE.2012.6292429","url":null,"abstract":"Many articles associated with glucose-insulin control have been divulged in the last decades, and in these articles frequently supposed that all the system state variables are accessible for feedback. The states like blood glucose and blood insulin are easy to measure, but the measurement of other states such as remote compartment insulin is difficult. This paper proposes an optimized nonlinear Luenberger observer using with the aid of a heuristic algorithm namely Particle Swarm Optimization with Linearly Decreasing Weight (LDW-PSO) for the three-state minimal nonlinear Bergman model. The goal of this optimization is the best recovery of invalid states that are inaccessible or prohibitive to be recovered straightly from the system outputs. The proposed method is a general technique such that for each control input and each disturbance input, one can design an optimal Luenberger observer whereas all unavailable states are appropriately reconstructed. Numerical simulations demonstrate the feasibility of proposed approach.","PeriodicalId":308726,"journal":{"name":"20th Iranian Conference on Electrical Engineering (ICEE2012)","volume":"461 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115938011","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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