http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Wenpin Luo,Jun Yang,Xinzhi Liu 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.2
This paper studies the reliable H∞ control on stochastic delayed Markovian jump systems (SDMJSs) with asynchronous jumped actuator failure and uncertain transition rates (TRs). It is assumed that the actuator failure occurs randomly under a Markov process with its jumping mode different from the system’s one. A generalized functional Itô’s formula for the closed-loop SDMJSs with mixed asynchronous Markovian jump modes (AMJMs) is successfully established. By the generalized functional Itô’s formula and the mixed-mode-dependent Lyapunov functionals, a sufficient delay-dependent condition of the reliable H∞ controller design for the SDMJSs with mixed AMJMs is proposed via matrix manipulation and a relaxation method. Finally, an example on VTOL (vertical take-off and landing) helicopter system is given to demonstrate the feasibility and effectiveness of the presented controller design scheme.
Wenpin Luo,Jun Yang,Xin Zhao 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.4
This paper focuses on further improved stability criteria for uncertain T-S fuzzy systems with timevaryingdelay by delay-partitioning approach and Free-Matrix-based integral inequality. A modified augmentedLyapunov-Krasovskii functional (LKF) is established by partitioning the delay in all integral terms. Then, on thebasis of taking into account the independent upper bounds of the delay derivative in various delay intervals, somenew results on tighter bounding inequalities, such as Peng-Park’s integral inequality and the Free-Matrix-basedintegral inequality are employed to effectively reduce the enlargement in bounding the derivative of LKF, therefore,less conservative results can be expected in terms of es and LMIs. Finally, three numerical examples are includedto show that the proposed method is less conservative than existing ones.
Robust H_∞ DOF Control for Uncertain T-S Fuzzy Neutral Systems
Wenpin Luo,Jun Yang,Li Xiang,Shouming Zhong 제어·로봇·시스템학회 2011 International Journal of Control, Automation, and Vol.9 No.3
This paper investigates the problem of robust H_∞ dynamic output-feedback (DOF) control for a class of uncertain T-S fuzzy neutral systems with linear fractional parametric uncertainties. The aim is to design a full-order fuzzy DOF controller that ensures asymptotic stability of the closed-loop system and guarantees a prescribed H_∞ performance level on disturbance attenuation for all admissible uncertainties. Based on the Lyapunov-Krasoviskii functional and the Barbalat lemma, delay-dependent sufficient conditions for the solvability of this problem are presented in terms of LMIs. Finally, a simulation example is provided to demonstrate the effectiveness and applicability of the proposed method.
Wenpin Luo,Xinzhi Liu,Jun Yang 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.3
This paper investigates the general decay stability on systems represented by stochastic functional differential equations with semi-Markovian switching and Lévy noise (SFDEs-sMS-LN). Based on generalized multidimensional Itô’s formula and multiple Lyapunov functions, a new pth moment stability criterion with general decay rate is established. Meanwhile, as an applications of the presented stability criterion, we consider the stabilization problem of stochastic delayed neural networks with semi-Markovian switching and Lévy noise (SDNN-sMS-LN). A vertex approach is proposed to design the controller in terms of binary diagonal matrices (BDMs) and linear matrix inequalities (LMIs). Finally, a numerical example is presented to demonstrate the effectiveness of the proposed results.
Jun Yang,Wenpin Luo,Yong-Hu Wang,Chun-Sheng Duan 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.6
This paper focuses on the robust stability criteria of uncertain T-S fuzzy systems with timevarying delay by delay-partitioning approach. An appropriate Lyapunov-Krasovskii functional is established in the framework of state vector augmentation. Then, on the basis of the Finsler’s lemma, some tighter bounding inequalities (Seuret-Wirtinger’s integral inequality and Peng-Park’s integral inequality) are employed to deal with (time-varying) delay-dependent integral items. Therefore, less conservative delay-dependent stability criteria are obtained in terms of linear matrix inequalities (LMIs), which can be solved efficiently with the Matlab LMI toolbox. Finally, two numerical examples are provided to show that the proposed conditions are less conservative than existing ones.
Jun Yang,Wenpin Luo,Yong-Hu Wang,Jun Cheng 제어·로봇·시스템학회 2016 International Journal of Control, Automation, and Vol.14 No.2
This paper is concerned with improved stability criteria for uncertain T-S fuzzy systems with intervaltime-varying delay by means of a new (m;N)-delay-partitioning approach. Based on an appropriate augmented LKFestablished in the framework of state vector augmentation, some tighter bounding inequalities (Seuret-Wirtinger’sintegral inequality, Peng-Park’s integral inequality and the reciprocally convex approach) have been employed todeal with (time-varying) delay-dependent integral items of the derivative of LKF, therefore, less conservative delaydependentstability criteria can be obtained on account of none of any useful time-varying items are arbitrarilyignored. It’s worth mentioning that, when the delay-partitioning number m is fixed, less conservatism can beachieved by increase of another delay-partitioning number N, but without increasing any computing burden. Finally,one numerical example is provided to show that the proposed conditions are less conservative than existing ones.
Delay-dependent Stabilization for Stochastic Delayed Fuzzy Systems with Impulsive Effects
Jun Yang,Shouming Zhong,Wenpin Luo,Guihua Li 제어·로봇·시스템학회 2010 International Journal of Control, Automation, and Vol.8 No.1
This paper investigates the problem of stabilization for a class of stochastic delayed Takagi-Sugeno (T-S) fuzzy systems with impulsive effects. The time delay is assumed to appear both in the state and control input. The purpose is design of a state-feedback fuzzy controller such that the resulting closed-loop system is exponentially stable in the mean square. By means of Lyapunov-Krasovskii functional, the relaxed LMI approach and mathematical analysis technique, delay-dependent sufficient conditions for solvability of this problem are obtained in terms of linear matrix inequalities (LMIs). Finally, a simulation example is given to demonstrate effectiveness and applicability of the theoretical results.
High Efficiency Transformation by Electroporation of Yarrowia lipolytica
Jia-Hung Wang,Wenpin Hung,Shu-Hsien Tsai 한국미생물학회 2011 The journal of microbiology Vol.49 No.3
Yarrowia lipolytica was usually transformed by heat shock, but linearized integrative vectors always resulted in a low transformation efficiency when electroporation was used. To develop a high efficiency integrative transformation method by electroporation of Y. lipolytica, we report here that pretreatment of Y. lipolytica with 150 mM LiAc for 1 h before electroporation will approximately 30-fold of increase transformation efficiency. A cell concentration of 1010/ml and instrument settings of 1.5 kV will generate the highest transformation efficiencies. We have developed a procedure to transform Y. lipolytica that will be able to yield an efficiency of 2.1×104 transformants/μg for integrative linear DNA. With our modifications, the electroporation procedures became a very efficient and reliable tool for Y. lipolytica transformation.