A self-tuning reaching law based sliding mode control(SMC)theory is proposed to stabilize the nonlinear continuous stirred tank reactor(CSTR).T-S fuzzy logic is used to build a global fuzzy state-space linear model.Co...A self-tuning reaching law based sliding mode control(SMC)theory is proposed to stabilize the nonlinear continuous stirred tank reactor(CSTR).T-S fuzzy logic is used to build a global fuzzy state-space linear model.Combing the traits of SMC and CSTR,three fuzzy rules can meet the requirements of controlled system.The self-tuning switch control law which can drive the state variables to the sliding surface as soon as possible is designed to ensure the robustness of uncertain fuzzy system.Lyapunov equation is applied to proving the stability of the sliding surface.The simulations show that the proposed approach can achieve desired performance with less chattering problem.展开更多
针对TCP(Transmission Control Protocol,传输控制协议)网络的拥塞控制问题,基于T-S(Takagi-Sugeno)模糊模型,采用滑模控制理论提出了一种新的AQM(Active Queue Management,主动队列管理)算法。考虑到TCP网络中存在的不确定和时变时滞因...针对TCP(Transmission Control Protocol,传输控制协议)网络的拥塞控制问题,基于T-S(Takagi-Sugeno)模糊模型,采用滑模控制理论提出了一种新的AQM(Active Queue Management,主动队列管理)算法。考虑到TCP网络中存在的不确定和时变时滞因素,首先利用T-S模糊模型对网络进行建模,然后利用线性矩阵不等式设计了一个渐近稳定的滑模面,而且还给出了一种能够明显减小滑模面附近抖振的趋近律,基于该趋近律设计的控制律能够有效地抑制路由器中队列长度的振荡,并使其快速收敛于期望值。仿真结果表明,该算法与普通的滑模控制算法相比具有更好的稳定性和鲁棒性,能够很好地适应复杂多变的TCP网络环境。展开更多
函数单向S-粗集(Function one direction singular rough sets)是用具有动态特性的R-函数等价类[u]定义的,函数单向S-粗集具有规律(函数)特征。利用函数单向S-粗集,给出F-粗规律(w-(x)F,w-(x)F)的结构,粗规律(w-(x),w-(x))的属性特征,...函数单向S-粗集(Function one direction singular rough sets)是用具有动态特性的R-函数等价类[u]定义的,函数单向S-粗集具有规律(函数)特征。利用函数单向S-粗集,给出F-粗规律(w-(x)F,w-(x)F)的结构,粗规律(w-(x),w-(x))的属性特征,属性距离,状态系数概念,利用这些概念,提出F-粗规律与它的属性控制,给出属性控制准则,属性控制定理与应用。F-粗规律与它的属性控制是函数S-粗集(Function singular rough sets)中的一个新的应用研究方向。展开更多
文摘A self-tuning reaching law based sliding mode control(SMC)theory is proposed to stabilize the nonlinear continuous stirred tank reactor(CSTR).T-S fuzzy logic is used to build a global fuzzy state-space linear model.Combing the traits of SMC and CSTR,three fuzzy rules can meet the requirements of controlled system.The self-tuning switch control law which can drive the state variables to the sliding surface as soon as possible is designed to ensure the robustness of uncertain fuzzy system.Lyapunov equation is applied to proving the stability of the sliding surface.The simulations show that the proposed approach can achieve desired performance with less chattering problem.
文摘针对TCP(Transmission Control Protocol,传输控制协议)网络的拥塞控制问题,基于T-S(Takagi-Sugeno)模糊模型,采用滑模控制理论提出了一种新的AQM(Active Queue Management,主动队列管理)算法。考虑到TCP网络中存在的不确定和时变时滞因素,首先利用T-S模糊模型对网络进行建模,然后利用线性矩阵不等式设计了一个渐近稳定的滑模面,而且还给出了一种能够明显减小滑模面附近抖振的趋近律,基于该趋近律设计的控制律能够有效地抑制路由器中队列长度的振荡,并使其快速收敛于期望值。仿真结果表明,该算法与普通的滑模控制算法相比具有更好的稳定性和鲁棒性,能够很好地适应复杂多变的TCP网络环境。
文摘函数单向S-粗集(Function one direction singular rough sets)是用具有动态特性的R-函数等价类[u]定义的,函数单向S-粗集具有规律(函数)特征。利用函数单向S-粗集,给出F-粗规律(w-(x)F,w-(x)F)的结构,粗规律(w-(x),w-(x))的属性特征,属性距离,状态系数概念,利用这些概念,提出F-粗规律与它的属性控制,给出属性控制准则,属性控制定理与应用。F-粗规律与它的属性控制是函数S-粗集(Function singular rough sets)中的一个新的应用研究方向。
