By using the exponential reaching law technology,a sliding mode controller was designed for Lorenz chaotic system subject to an unknown external disturbance.On this basis,considering the unknown disturbance,an adaptiv...By using the exponential reaching law technology,a sliding mode controller was designed for Lorenz chaotic system subject to an unknown external disturbance.On this basis,considering the unknown disturbance,an adaptive law was introduced to adaptively estimate the parameters of the disturbance bounds.Furthermore,to eliminate the chattering resulting from the discontinuous switch controller and to guarantee system transient performance,a new adaptive fuzzy sliding mode controller was designed.The results of the simulation show the effectiveness of the proposed control scheme.展开更多
In this paper, the synchronization of a unified chaotic system is investigated by the use of output feedback controllers; a two-input single-output feedback controller and single-input single-output feedback controlle...In this paper, the synchronization of a unified chaotic system is investigated by the use of output feedback controllers; a two-input single-output feedback controller and single-input single-output feedback controller are presented to synchronize the unified chaotic system when the states are not all measurable. Compared with the existing results, the controllers designed in this paper have some advantages such as small feedback gain, simple structure and less conservation. Finally, numerical simulations results are provided to demonstrate the validity and effectiveness of the proposed method.展开更多
This paper is devoted to the investigation of variable structure control in a nonlinear flexible robot system.With the help of the theory of functional analysis and the operator semigroup,we have proved that the given...This paper is devoted to the investigation of variable structure control in a nonlinear flexible robot system.With the help of the theory of functional analysis and the operator semigroup,we have proved that the given nonlinear flexible robot system is exponential stable under the appropriate sliding mode control.展开更多
对于二阶van der Pol混沌系统,采用不同的趋近律设计滑模控制器进行平衡控制。在滑模控制器的设计中,分别采用指数趋近律和快速幂次趋近律。采用指数趋近律时,控制输入出现了抖振现象。采用快速幂次趋近律时,控制输入没有出现抖振现象...对于二阶van der Pol混沌系统,采用不同的趋近律设计滑模控制器进行平衡控制。在滑模控制器的设计中,分别采用指数趋近律和快速幂次趋近律。采用指数趋近律时,控制输入出现了抖振现象。采用快速幂次趋近律时,控制输入没有出现抖振现象。通过MATLAB/Simulink软件建立采用不同趋近律的滑模控制仿真实验。该仿真实验,有助于学生对混沌控制和滑模控制的理论理解和工程应用。展开更多
基金supported by the National Natural Science Foundation of China (Grant No.69874008).
文摘By using the exponential reaching law technology,a sliding mode controller was designed for Lorenz chaotic system subject to an unknown external disturbance.On this basis,considering the unknown disturbance,an adaptive law was introduced to adaptively estimate the parameters of the disturbance bounds.Furthermore,to eliminate the chattering resulting from the discontinuous switch controller and to guarantee system transient performance,a new adaptive fuzzy sliding mode controller was designed.The results of the simulation show the effectiveness of the proposed control scheme.
基金Project supported by the National Natural Science Foundation of China (Grant Nos 60643003 and 0611051200)
文摘In this paper, the synchronization of a unified chaotic system is investigated by the use of output feedback controllers; a two-input single-output feedback controller and single-input single-output feedback controller are presented to synchronize the unified chaotic system when the states are not all measurable. Compared with the existing results, the controllers designed in this paper have some advantages such as small feedback gain, simple structure and less conservation. Finally, numerical simulations results are provided to demonstrate the validity and effectiveness of the proposed method.
文摘This paper is devoted to the investigation of variable structure control in a nonlinear flexible robot system.With the help of the theory of functional analysis and the operator semigroup,we have proved that the given nonlinear flexible robot system is exponential stable under the appropriate sliding mode control.
文摘对于二阶van der Pol混沌系统,采用不同的趋近律设计滑模控制器进行平衡控制。在滑模控制器的设计中,分别采用指数趋近律和快速幂次趋近律。采用指数趋近律时,控制输入出现了抖振现象。采用快速幂次趋近律时,控制输入没有出现抖振现象。通过MATLAB/Simulink软件建立采用不同趋近律的滑模控制仿真实验。该仿真实验,有助于学生对混沌控制和滑模控制的理论理解和工程应用。
