Pub Date : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356673
M. Fattahi, H. Momeni
In this paper, the problems of stability and stabilization will be discussed for linear discrete time-delayed systems with time-varying delays. At first, applying Lyapunov-Krasovskii functional method, sufficient condition for checking the stability of system is offered. Then, the stabilization of system is improved via dynamic state-feedback controller. In fact, the proposed condition is a criterion which results in increase of regions of stabilization for such systems. This result is in the linear matrix inequality (LMI) framework which can be solved easily by using the existing standard numerical software. Illustrative examples confirm the advantages of developed approach. In the sequel, the obtained stability and stabilization conditions will be extended to uncertain discrete time-delayed systems (UDTDS) with norm-bounded parameter uncertainties.
{"title":"Novel stabilization and robust stabilization conditions for linear discrete time-delayed systems","authors":"M. Fattahi, H. Momeni","doi":"10.1109/ICCIAUTOM.2011.6356673","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356673","url":null,"abstract":"In this paper, the problems of stability and stabilization will be discussed for linear discrete time-delayed systems with time-varying delays. At first, applying Lyapunov-Krasovskii functional method, sufficient condition for checking the stability of system is offered. Then, the stabilization of system is improved via dynamic state-feedback controller. In fact, the proposed condition is a criterion which results in increase of regions of stabilization for such systems. This result is in the linear matrix inequality (LMI) framework which can be solved easily by using the existing standard numerical software. Illustrative examples confirm the advantages of developed approach. In the sequel, the obtained stability and stabilization conditions will be extended to uncertain discrete time-delayed systems (UDTDS) with norm-bounded parameter uncertainties.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"33 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131878646","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356792
S. Sadeghzadeh, M. Korayem, V. Rahneshin, A. Homayooni
One of the applications of nano-robots is the automatic nano-manipulation process. The experimental results indicate that nano-manipulations that are performed in a long time span are not very precise, and often the existence of different error sources, including the tip damage, causes these results to deviate from the intended outcome. In this article, by focusing on the phenomenon of tip damage in the automatic manipulation mechanism, a shape-feedback controller has been introduced to decrease the positioning errors. For this purpose, the tip's root mean squares (RMS) changes have been calculated to use as a criterion of deformation level of tip and particle. Presented shape-feedback controller is a simple and reliable procedure for a more accurate nano-manipulation. At the end, some comparisons are provided for RMS and positioning errors with and without shape-feedback. These comparisons show the applicability and potential of present approach as a controller in automatic nano-manipulation process. Decreasing the positioning errors from 37.77% to 17.77% is the most significant result of this paper.
{"title":"A shape-feedback approach for more precise automatic nano manipulation process","authors":"S. Sadeghzadeh, M. Korayem, V. Rahneshin, A. Homayooni","doi":"10.1109/ICCIAUTOM.2011.6356792","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356792","url":null,"abstract":"One of the applications of nano-robots is the automatic nano-manipulation process. The experimental results indicate that nano-manipulations that are performed in a long time span are not very precise, and often the existence of different error sources, including the tip damage, causes these results to deviate from the intended outcome. In this article, by focusing on the phenomenon of tip damage in the automatic manipulation mechanism, a shape-feedback controller has been introduced to decrease the positioning errors. For this purpose, the tip's root mean squares (RMS) changes have been calculated to use as a criterion of deformation level of tip and particle. Presented shape-feedback controller is a simple and reliable procedure for a more accurate nano-manipulation. At the end, some comparisons are provided for RMS and positioning errors with and without shape-feedback. These comparisons show the applicability and potential of present approach as a controller in automatic nano-manipulation process. Decreasing the positioning errors from 37.77% to 17.77% is the most significant result of this paper.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133619835","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356653
E. Ataei, R. Afshari, M. Pourmina, M. Karimian
Solar energy has been accepted as an alternative source of energy worldwide recently. Current researches and markets have shown that Solar Photovoltaic (PV) is the fastest growing and most promising form of renewable energy used in generating electricity. Solar energy is rapidly advancing as an important means of renewable energy resource. More energy is produced by tracking the solar panel to remain aligned to the sun at a right angle to the rays of light. This paper presents an intelligent sun tracking system in which photo-resistors (sensors) are used to determine the direction of the sunlight. The hardware structure of the system consists of a TMS320F2812 DSP chip. The solar cell is used as the power supply of the controlling system. Finally, an intelligent solar power plant is implemented by means of the techniques mentioned above.
{"title":"Design and construction of a fuzzy logic dual axis solar tracker based on DSP","authors":"E. Ataei, R. Afshari, M. Pourmina, M. Karimian","doi":"10.1109/ICCIAUTOM.2011.6356653","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356653","url":null,"abstract":"Solar energy has been accepted as an alternative source of energy worldwide recently. Current researches and markets have shown that Solar Photovoltaic (PV) is the fastest growing and most promising form of renewable energy used in generating electricity. Solar energy is rapidly advancing as an important means of renewable energy resource. More energy is produced by tracking the solar panel to remain aligned to the sun at a right angle to the rays of light. This paper presents an intelligent sun tracking system in which photo-resistors (sensors) are used to determine the direction of the sunlight. The hardware structure of the system consists of a TMS320F2812 DSP chip. The solar cell is used as the power supply of the controlling system. Finally, an intelligent solar power plant is implemented by means of the techniques mentioned above.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121049409","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356628
A. Rahideh, T. Korakianitis
This paper presents the design and optimization procedure for slotless brushless DC (BLDC) motors. The motor optimization is achieved using a modified harmony search technique, though other optimization methods can also be used. The expressions of motor electromagnetic torque, speed, voltage, current, power losses, volume and cost are analytically represented as functions of motor geometric parameters. The objective function is a combination of motor power losses, volume and cost, and needs to be minimized subject to a set of electrical and mechanical requirements and limitations. Ten design parameters are considered including the number of poles, current density and the dimensions of magnet, stator, rotor, winding and air-gap. The effects of each design parameter on the brushless DC motor performance have been investigated. The method was originally conceived for the design of a small motor for a biomedical application, but in this paper one sample case of a larger motor illustrates the general use of the technique.
{"title":"Brushless DC motor design using harmony search optimization","authors":"A. Rahideh, T. Korakianitis","doi":"10.1109/ICCIAUTOM.2011.6356628","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356628","url":null,"abstract":"This paper presents the design and optimization procedure for slotless brushless DC (BLDC) motors. The motor optimization is achieved using a modified harmony search technique, though other optimization methods can also be used. The expressions of motor electromagnetic torque, speed, voltage, current, power losses, volume and cost are analytically represented as functions of motor geometric parameters. The objective function is a combination of motor power losses, volume and cost, and needs to be minimized subject to a set of electrical and mechanical requirements and limitations. Ten design parameters are considered including the number of poles, current density and the dimensions of magnet, stator, rotor, winding and air-gap. The effects of each design parameter on the brushless DC motor performance have been investigated. The method was originally conceived for the design of a small motor for a biomedical application, but in this paper one sample case of a larger motor illustrates the general use of the technique.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116892787","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356729
M. Faieghi, H. Delavari, A. Jalali
We address the problem of chaos suppression in Lorenz system with a novel fractional-order controller. Our approach relies on Caputo's differintegration. Indeed, we introduce a new concept of sliding mode control based on Caputo's definition of fractional derivative. Accordingly, a novel nonlinear fractional-order sliding surface is designed. Then an appropriate control law is established on the surface. Stability of the closed-loop system is presented via rigorous analyses by means of Lyapunov direct method. An adaptation law is derived for the switching gain which allows us to ensure the stability of control system without necessity of knowing the upper bounds of uncertainties and disturbances. The proposed method is also verified by numerical simulations and is compared with conventional sliding mode control. It is shown that the proposed control algorithm outperforms conventional sliding mode by providing higher performance and smaller control input. The controller provides fulfilling performance, high robustness and chattering free control effort.
{"title":"Control of Lorenz system with a novel fractional controller: A Caputo's differintegration based approach","authors":"M. Faieghi, H. Delavari, A. Jalali","doi":"10.1109/ICCIAUTOM.2011.6356729","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356729","url":null,"abstract":"We address the problem of chaos suppression in Lorenz system with a novel fractional-order controller. Our approach relies on Caputo's differintegration. Indeed, we introduce a new concept of sliding mode control based on Caputo's definition of fractional derivative. Accordingly, a novel nonlinear fractional-order sliding surface is designed. Then an appropriate control law is established on the surface. Stability of the closed-loop system is presented via rigorous analyses by means of Lyapunov direct method. An adaptation law is derived for the switching gain which allows us to ensure the stability of control system without necessity of knowing the upper bounds of uncertainties and disturbances. The proposed method is also verified by numerical simulations and is compared with conventional sliding mode control. It is shown that the proposed control algorithm outperforms conventional sliding mode by providing higher performance and smaller control input. The controller provides fulfilling performance, high robustness and chattering free control effort.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115421949","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356641
S. Hosseinnia, I. Tejado, B. Vinagre, V. Milanés, J. Villagrá
Highly non-linear vehicle dynamics plays an important role in autonomous driving systems, especially in congested traffic situations at very low speeds. Due to this fact, accurate controllers are needed in order to ensure safety during navigation. In this paper, based on a previous fractional order speed control, an improved fractional order control is presented to control a commercial Citroën C3 prototype - which has automatic driving capabilities - at low speeds, which considers a hybrid model of the vehicle. Specifically, two different fractional order PIα controllers are designed to act over the throttle and brake pedals, respectively. Concerning to the uncertain dynamics of the system during the brake action parameters are tuned to design a robust controller. In addition, the system is modeled as hybrid fractional order differential inclusions. Experimental and simulation results, obtained in a real circuit, are given to demonstrate the effectiveness of the proposed strategies for cruise control at low speeds.
{"title":"Low speed control of an autonomous vehicle using a hybrid fractional order controller","authors":"S. Hosseinnia, I. Tejado, B. Vinagre, V. Milanés, J. Villagrá","doi":"10.1109/ICCIAUTOM.2011.6356641","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356641","url":null,"abstract":"Highly non-linear vehicle dynamics plays an important role in autonomous driving systems, especially in congested traffic situations at very low speeds. Due to this fact, accurate controllers are needed in order to ensure safety during navigation. In this paper, based on a previous fractional order speed control, an improved fractional order control is presented to control a commercial Citroën C3 prototype - which has automatic driving capabilities - at low speeds, which considers a hybrid model of the vehicle. Specifically, two different fractional order PIα controllers are designed to act over the throttle and brake pedals, respectively. Concerning to the uncertain dynamics of the system during the brake action parameters are tuned to design a robust controller. In addition, the system is modeled as hybrid fractional order differential inclusions. Experimental and simulation results, obtained in a real circuit, are given to demonstrate the effectiveness of the proposed strategies for cruise control at low speeds.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115390828","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356809
A. Nazari, S. Moosavian, A. Hasani
In this paper, kinematics analysis and dynamic modeling of a novel spatial parallel robot is elaborated. The proposed mechanism is to be exploited in a compounded serial-parallel mobile robotic system to accomplish stabilized heavy object manipulation by a serial manipulator mounted on the parallel mechanism. In fact, this parallel mechanism has been designed to acquire a suitable maneuverability and fulfill the tipover avoidance of the aforementioned robotic system after grasping heavy objects. The proposed mechanism is made of three legs while each leg has one active degree of freedom (DOF) and consequently, the mechanism would be 3-DOF. In order to investigate this novel CRRR parallel robot, inverse kinematics of the mechanism is discussed. Next, the dynamic model of the mechanism is developed. Then, the verification of the obtained dynamic model is guaranteed utilizing two various rational maneuvers. Finally, the obtained results and remarks are concluded and the future research is expressed.
{"title":"Kinematics analysis, dynamic modeling and verification of a CRRR 3-DOF spatial parallel robot","authors":"A. Nazari, S. Moosavian, A. Hasani","doi":"10.1109/ICCIAUTOM.2011.6356809","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356809","url":null,"abstract":"In this paper, kinematics analysis and dynamic modeling of a novel spatial parallel robot is elaborated. The proposed mechanism is to be exploited in a compounded serial-parallel mobile robotic system to accomplish stabilized heavy object manipulation by a serial manipulator mounted on the parallel mechanism. In fact, this parallel mechanism has been designed to acquire a suitable maneuverability and fulfill the tipover avoidance of the aforementioned robotic system after grasping heavy objects. The proposed mechanism is made of three legs while each leg has one active degree of freedom (DOF) and consequently, the mechanism would be 3-DOF. In order to investigate this novel CRRR parallel robot, inverse kinematics of the mechanism is discussed. Next, the dynamic model of the mechanism is developed. Then, the verification of the obtained dynamic model is guaranteed utilizing two various rational maneuvers. Finally, the obtained results and remarks are concluded and the future research is expressed.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115658671","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356812
M. M. Naserimojarad, A. Tadayoninejad, M. Eghtesad
Nowadays MR dampers are used widely in vibration isolation and motion control applications. These actuators had lots of advantages in comparison to old shock absorbers such as controllability and adaption to vibrations with variable frequencies. One major problem of MR dampers which limits their performance in high frequency vibration applications is dullness and high response time. This dullness is caused by electrical circuit and mechanical delays. In this paper a theoretical and experimental investigation has been done to reduce electrical response time of MR dampers. Different solutions for driving MR dampers have been analyzed. An extra fast method for charging and discharging MR damper is proposed in this paper. The suggested method has been tested on a prototype MR damper. The experimental results are compared with simulation results and other current control methods. The proposed method can reduce response time of MR dampers from a few milliseconds to a few micro seconds.
{"title":"An innovative design of fast current controller circuit for MR dampers","authors":"M. M. Naserimojarad, A. Tadayoninejad, M. Eghtesad","doi":"10.1109/ICCIAUTOM.2011.6356812","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356812","url":null,"abstract":"Nowadays MR dampers are used widely in vibration isolation and motion control applications. These actuators had lots of advantages in comparison to old shock absorbers such as controllability and adaption to vibrations with variable frequencies. One major problem of MR dampers which limits their performance in high frequency vibration applications is dullness and high response time. This dullness is caused by electrical circuit and mechanical delays. In this paper a theoretical and experimental investigation has been done to reduce electrical response time of MR dampers. Different solutions for driving MR dampers have been analyzed. An extra fast method for charging and discharging MR damper is proposed in this paper. The suggested method has been tested on a prototype MR damper. The experimental results are compared with simulation results and other current control methods. The proposed method can reduce response time of MR dampers from a few milliseconds to a few micro seconds.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116179618","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356636
Y. Rasekhipour, A. Ohadi
Ride comfort is one of the main indexes of a comfortable vehicle, and engine mounts play an undeniable role in it. In this paper, a simplified model of an engine system is expressed to evaluate the performance of a semi-active MagnetoRheological (MR) engine mount and compare it with that of the passive Hydraulic Engine Mount (HEM) on which engine is originally mounted, to investigate if it is advantageous to be used in engine system instead of the HEM. Two methods are used to control the semi-active system including skyhook and robust μ-synthesis. It is attempted to improve two performance cases via the controlled MR engine mount: to reduce the force transmitted to the chassis initiating from engine forces, and to control the relative displacement of engine mount from road excitation. Considerable improvement is achieved over the HEM by applying the MR mount.
{"title":"Evaluating vibration performance of a semi-active MR engine mount","authors":"Y. Rasekhipour, A. Ohadi","doi":"10.1109/ICCIAUTOM.2011.6356636","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356636","url":null,"abstract":"Ride comfort is one of the main indexes of a comfortable vehicle, and engine mounts play an undeniable role in it. In this paper, a simplified model of an engine system is expressed to evaluate the performance of a semi-active MagnetoRheological (MR) engine mount and compare it with that of the passive Hydraulic Engine Mount (HEM) on which engine is originally mounted, to investigate if it is advantageous to be used in engine system instead of the HEM. Two methods are used to control the semi-active system including skyhook and robust μ-synthesis. It is attempted to improve two performance cases via the controlled MR engine mount: to reduce the force transmitted to the chassis initiating from engine forces, and to control the relative displacement of engine mount from road excitation. Considerable improvement is achieved over the HEM by applying the MR mount.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"617 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123809803","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 : 2011-12-01DOI: 10.1109/ICCIAUTOM.2011.6356821
M. Ayati
This paper presents a new chaos synchronization scheme based on the proposed stochastic adaptive sliding mode observer. The observer overcomes the drive system model uncertainties and unknown parameters to recover the drive system chaotic states form a scalar noisy coupling signal. Using the appropriate adaptation low the unknown parameters of the drive system are estimated and used to boost the state estimations. In addition, drive system state noise, channel noise, and measurement noise, are considered and the system and observer are modeled via stochastic differential equations. Stochastic stability of the drive-response system is proved through several theorems. These theorems guarantee that the mean values of the state estimation errors converge to zero as time goes to infinity. In the observer the adaptive sliding mode gains are always nonsingular even when the estimation error goes to zero. Presented numerical simulations confirm the effectiveness of the proposed observer and chaos synchronization scheme.
{"title":"Stochastically stable robust observer for uncertain chaotic systems with system and measurement noises","authors":"M. Ayati","doi":"10.1109/ICCIAUTOM.2011.6356821","DOIUrl":"https://doi.org/10.1109/ICCIAUTOM.2011.6356821","url":null,"abstract":"This paper presents a new chaos synchronization scheme based on the proposed stochastic adaptive sliding mode observer. The observer overcomes the drive system model uncertainties and unknown parameters to recover the drive system chaotic states form a scalar noisy coupling signal. Using the appropriate adaptation low the unknown parameters of the drive system are estimated and used to boost the state estimations. In addition, drive system state noise, channel noise, and measurement noise, are considered and the system and observer are modeled via stochastic differential equations. Stochastic stability of the drive-response system is proved through several theorems. These theorems guarantee that the mean values of the state estimation errors converge to zero as time goes to infinity. In the observer the adaptive sliding mode gains are always nonsingular even when the estimation error goes to zero. Presented numerical simulations confirm the effectiveness of the proposed observer and chaos synchronization scheme.","PeriodicalId":438427,"journal":{"name":"The 2nd International Conference on Control, Instrumentation and Automation","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128330305","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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