{"title":"An improved PID control structure for unstable processes","authors":"Boulbaba Guedri, A. Chaari","doi":"10.1109/STA.2015.7505219","DOIUrl":"https://doi.org/10.1109/STA.2015.7505219","url":null,"abstract":"This paper presents a novel control scheme based on modified Proportional-Integral-Derivative (PID) control structure and improved Integral-Proportional (IP) control strategy for controlling unstable, resonant and integrating processes. The newly proposed control structure, named αIP-PD, ensures a good compromise between the above two strategies by giving relatively quick dynamic response with little or no overshoot towards the step input reference. Thus, it not only offers the opportunity to move the pole locations of the controlled plant to more convenient locations, but also its zeros. On the other hand, for setting the feedforward controller gain α, a tuning method is suggested based on minimization of multidimensional rough objective functions and using Artificial Bee Colony (ABC) algorithm. Finally, some examples of different styles of case studies are given, and the simulation results demonstrate that the αIP-PD is more efficient and robust compare to the regular PI-PD controller with optimum gains. Thereby, it leads to better transient behavior, good steady state accuracy, good disturbance rejection, and small parameter sensitivity.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121663723","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}
{"title":"Estimation of flux and speed of induction machine using non-singular terminal sliding-mode observers","authors":"Asma Zaidi, K. Dahech, T. Damak","doi":"10.1109/STA.2015.7505237","DOIUrl":"https://doi.org/10.1109/STA.2015.7505237","url":null,"abstract":"In this work, high-order non-singular terminal sliding-mode observers are presented. These observers are designed in order to estimate rotor fluxes and rotor speed of induction motors. The first observer provides the currents estimates which serve as an input for the second observer. The output of the second observer is the rotor fluxes estimates. Finally, estimates of the rotor fluxes are utilized to foresee rotor speed.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123220791","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}
{"title":"New phototransistor design to improve the electrical and optical performance using gate-engineering aspect","authors":"H. Ferhati, F. Djeffal, D. Arar","doi":"10.1109/STA.2015.7505143","DOIUrl":"https://doi.org/10.1109/STA.2015.7505143","url":null,"abstract":"Our objective in this work is to propose a novel optically controlled field effect transistor OC-FET design by using the gate engineering paradigm. Besides, analytical analysis has been conducted and investigated for the improvement of the electrical and optical criteria related to OC-FET-based applications. By using a compact modeling framework, the comparison between the proposed Dual Gate (DG) OC-FET design against its conventional counterpart has been exploited to validate the enhanced electrical efficiency of the presented structure in terms of increased gain voltage, ION/IOFF ratio and superior drain current driving capability. The obtained results are found to be in a good agreement in comparison to that provided by the numerical results, thus confirming the precision of our modeling approach.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131312438","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}
{"title":"Direct fractional adaptive pole placement control for minimal phase systems","authors":"S. Ladaci, Souad Chettah, K. Khettab","doi":"10.1109/STA.2015.7505181","DOIUrl":"https://doi.org/10.1109/STA.2015.7505181","url":null,"abstract":"This paper deals with direct adaptive pole placement control bases on polynomial control solution. The considered problem concerns many potential industrial applications. We propose a direct adaptive control algorithm by mean of fractional order pole assignment. A simulation example illustrates the enhancement obtained in system's dynamics comparatively to existing algorithms.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125496710","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}
{"title":"Hybrid SVD-DWT watermarking technique using AES algorithm for medical image safe transfer","authors":"Sondes Ajili, Mohamed Ali Hajjaji, A. Mtibaa","doi":"10.1109/STA.2015.7505164","DOIUrl":"https://doi.org/10.1109/STA.2015.7505164","url":null,"abstract":"This manuscript presents a watermarking method based on Discrete Wavelet Transform (DWT) and Singular Value Decomposition (SVD) with the Advanced Encryption Standard (AES) algorithm encryption applied on medical image. The proposed schema will be developed to increase the protection and robustness along with security. In our algorithm, after decomposing the original image into four sub-bands in the second level of the DWT, we apply the SVD transform to the high band, and embed the binary watermark (patient's data) by changing the singular values. For enhance robustness, AES encryption algorithm are used. After application various type of attacks (JPEG compression, median filter, Salt and pepper, and cropping), we used the serial turbo code in order to control identification and, if possible, correct the watermark, Experiments and analysis results demonstrated that low distortion and increased robustness have been made in the process of watermarking, simultaneously, elevated security has been proved in the encryption phase. The evaluation studies are applied on MRI medical image.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130213648","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}
{"title":"Antipodal Vivaldi antenna array with high gain and reduced mutual coupling for UWB applications","authors":"R. Herzi, H. Zairi, A. Gharsallah","doi":"10.1109/STA.2015.7505195","DOIUrl":"https://doi.org/10.1109/STA.2015.7505195","url":null,"abstract":"An Antipodal Vivaldi antenna (A VA) with enhanced radiation characteristics for UWB applications is presented in this paper. By using of a triangular director with high permittivity in the end of the antenna aperture, the directivity, the beamwidth and the mutual decoupling are ameliorated over the wideband applications. In order to achieve a compact structure with higher gain and ameliorated mutual decoupling, 1×4 planar antenna array is proposed.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134084182","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}
{"title":"Unbiased minimum variance state and fault estimation for nonlinear stochastic systems with unknown disturbances","authors":"Bessaoudi Talel, Herrili Marouen, F. Ben Hmida","doi":"10.1109/STA.2015.7505222","DOIUrl":"https://doi.org/10.1109/STA.2015.7505222","url":null,"abstract":"This paper investigated the problem of state and fault estimation for nonlinear discrete time systems in presence of unknown disturbances. A novel unbiased minimum variance filter (UMVF) is derived by reconstructing the non linear version of NUMV filter. In this work we assume that no prior knowledge about the dynamic of the disturbance and the fault are known. In this paper we considers that the fault affects both the system state and measurement equations, but the disturbance affects only the system state. The NUMV filter presented in this paper is an extension of the filter presented in [11]. The efficacy of the proposed filter is demonstrated by two simulation examples.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134346147","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}
{"title":"A graphical active fault tolerant control approach","authors":"H. Najari, R. El Harabi, M. Abdelkrim","doi":"10.1109/STA.2015.7505136","DOIUrl":"https://doi.org/10.1109/STA.2015.7505136","url":null,"abstract":"A fault tolerant control synthesis is a key solution for great and several issues which threat system safety and may have critical and dangerous consequences especially in aeronautics, medicines and chemical industry. This is why, in this present work, an Active Fault Tolerant Control (AFTC) framework is designed using a linear adaptive observer-based fault detection and estimation tasks, into graphical aspect, and a graphical PI controller in an additive form so as to ensure a control closed-loop strategy. Motivated by benefits of the Bond Graph (BG) tool as a useful method for multidisciplinary systems and which is characterized by structural, causal and behavioral properties, the proposed approach is presented. The efficiency and the relevance of the developed AFTC are proved through simulation results on a hydraulic process with two tanks together with and without fault scenarios.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132239915","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}
Nadia Gargouri, M. Hajri, D. Ben Issa, A. Kachouri, M. Samet
{"title":"Graphical optimization method applied to a 6 GHz single-ended ring oscillators","authors":"Nadia Gargouri, M. Hajri, D. Ben Issa, A. Kachouri, M. Samet","doi":"10.1109/STA.2015.7505191","DOIUrl":"https://doi.org/10.1109/STA.2015.7505191","url":null,"abstract":"In this paper, we present a graphical optimization method in order to optimize the CMOS Ring oscillators. The design constraints equations of phase noise, tuning range, power consumption and start-up condition are presented in the same plan to find the optimal sizing of all components of CMOS ring oscillators. The optimized ring oscillator characteristics a simulated phase noise of -111.25dBc/Hz at 10 MHz offset from a 6 GHz. The VCO turns from 7.74 GHz to 4.26 GHz with a tuning voltage that varies from 0.5 V to 1.4 V, and the designed oscillator dissipates only 7 mW at 6 GHz carrier. Simulation verifies the theory approximations done by the graphical optimization method.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"229 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113995660","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}
{"title":"Modeling and simulation of electric and hybrid vehicles for recreational vehicle","authors":"Mohamed Yaich, M. Hachicha, M. Ghariani","doi":"10.1109/STA.2015.7505098","DOIUrl":"https://doi.org/10.1109/STA.2015.7505098","url":null,"abstract":"This paper presents a modeling and simulation of three different vehicles topologies (electric vehicle, series hybrid electric vehicle and parallel hybrid electric vehicle) using the ADVISOR (ADvanced VehIcle SimulatOR). An accurate evaluation of the performance of a hybrid electric vehicle, as well as of its consumption and pollution level, requires a dynamic analysis of its behavior. Two kinds of simulation tools for electric and hybrid electric vehicles exist: steady state and dynamic tools. Tools using steady-state models are appropriate for system-level analysis, whereas tools that use dynamic models allow for information about the sublevel components behavior. An accurate evaluation of the vehicle performance requires a dynamic model that includes many components such as its electric motor, its batteries, its generator, and its combustion engine. In a first step, the vehicle components are sized, using a power flow analysis, to meet the requirements of energy and power of a typical “recreational vehicle”. In a second step, simulation results are presented and discussed to evaluate complexity, emission and consumption.","PeriodicalId":128530,"journal":{"name":"2015 16th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114403802","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}