Event-based control for networked T-S fuzzy cascade control systems with quantization and cyber attacks     

Jinliang Liu  Yuda Wang  Lijuan Zha  Huaicheng Yan 《Journal of The Franklin Institute》2019,356(16):9451-9473

This paper investigates the event-based control for networked T-S fuzzy cascade control systems with quantization and cyber attacks. In order to solve the problem of limited communication resources, an event-triggered scheme and a quantization mechanism are adopted, which can effectively reduce the burden of communication and save the network resources of the system. By considering the influence of cyber attacks, a newly quantized T-S fuzzy model for networked cascade control systems (NCCSs) under the event-triggered scheme is established. By using the Lyapunov stability theory, sufficient conditions guaranteeing the asymptotical stability of networked T-S fuzzy cascade control systems are obtained. In addition, the controller gains are derived by solving a set of linear matrix inequalities. Finally, a numerical example is presented to verify the validity of the proposed method.  相似文献   

Finite/fixed-time synchronization control of coupled memristive neural networks     

Jiarong Li  Haijun Jiang  Cheng Hu  Ahmed Alsaedi 《Journal of The Franklin Institute》2019,356(16):9928-9952

Finite-time and fixed-time synchronization (FAFS) of coupled memristive neural networks (CMNNs) with discontinuous feedback functions are explored in this paper. Firstly, a more comprehensive stability theory is systematically established. Secondly, by designing adaptive feedback controller and discontinuous feedback controller, both finite-time and fixed-time synchronization can be realized through regulating the main control parameter. Thirdly, 1-norm and quadratic-norm Lyapunov functions are considered simultaneously in this article, while in estimating the settling time, the former one is more accurate than the latter one under the same synchronization criteria. Finally, in numerical simulation, the analysis and comparison of the proposed controllers are given to show the effectiveness of the corresponding results.  相似文献   

Asynchronous H∞ fixed-order filtering for LPV switched delay systems with mode-dependent average dwell time     

Yanhui Li  Peng Bo  Ji Qi 《Journal of The Franklin Institute》2019,356(18):11792-11816

This paper investigates the problem of robust H_∞ fixed-order filtering for a class of linear parameter-varying (LPV) switched delay systems under asynchronous switching that the system parameter matrices and the time delays are dependent on the real-time measured parameters. The so-called asynchronous switching means that there are time delays between the switching of filters and the switching of system modes. By constructing the parameter-dependent and mode-dependent Lyapunov-Krasovskii functional which is allowed to increase during the running time of active subsystem with the mismatched filter, and using the mode-dependent average dwell time (MDADT) switching method, the sufficient conditions for exponential stability and satisfying a novel weighted H_∞ criterion are derived. As there exist couplings between Lyapunov-Krasovskii functional matrices and system parameter matrices, we utilize slack matrices to decouple them. Based on the above results, a suitable weighted H_∞ fixed-order filter can be obtained in the form of the parameter linear matrix inequalities (PLMIs). By virtue of approximate basis function and gridding technique, the design of weighted H_∞ fixed-order filter can be transformed into the solution of the finite dimensional LMIs. Finally, a numerical example is presented to verify both the effectiveness and the low conservatism of the parameter-dependent and mode-dependent fixed-order filtering method proposed in this paper.  相似文献   

科技学术期刊作者贡献声明著录现状分析_^*     

徐文华  王景周 《科技管理研究》2019,(12)

学术论文的各种署名失范行为严重影响文献计量和学术评价的客观性和公正性,作者贡献声明对规范作者署名具有重要的约束作用。首先,以中国科学引文数据库(CSCD)2017—2018版来源期刊为研究对象,考察我国科技学术期刊的作者贡献声明著录现状,发现：1229种期刊中仅有2.6%(32/1028)的期刊注有作者贡献声明,其中中文语种期刊0.19%(2/1028),英文语种期刊14.93%(30/201)。其次,分析作者贡献声明在我国科技学术期刊中没有得到普及的原因及著录中存在的问题。最后,提出一些建议和措施,为规范作者署名、真实体现作者贡献、推动科技合作和学术评价提供参考。  相似文献   

Stability of mode-dependent linear switched singular systems with stable and unstable subsystems     

Jumei Wei  Huimin Zhi  Kai Liu  Xiaowu Mu 《Journal of The Franklin Institute》2019,356(5):3102-3114

This paper studies the E-exponential stability of mode-dependent linear switched singular systems with stable and unstable subsystems. First, by constructing an appropriate multiple discontinuous Lyapunov function, new sufficient conditions of E-exponential stability for linear switched singular systems are established. Considering the feature of mode-dependent average dwell time switching, we adopt the switching strategy where fast switching and slowing switching are respectively applied to unstable and stable subsystems. Compared with the existing results, our approach is more flexible and tighter bounds can be obtained. Finally, a numerical example is provided to illustrate the effectiveness of the proposed criteria.  相似文献   

A robust unscented transformation for uncertain moments     

Hugo T.M. Kussaba  João Y. Ishihara  Leonardo R.A.X. Menezes 《Journal of The Franklin Institute》2019,356(6):3797-3810

This paper proposes a robust version of the unscented transform (UT) for one-dimensional random variables. It is assumed that the moments are not exactly known, but are known to lie in intervals. In this scenario, the moment matching equations are reformulated as a system of polynomial equations and inequalities, and it is proposed to use the Chebychev center of the solution set as a robust UT. This method yields a parametrized polynomial optimization problem, which in spite of being NP-Hard, can be relaxed by some algorithms that are proposed in this paper.  相似文献   

Dynamic output feedback sliding mode control for spacecraft hovering without velocity measurements     

Kai Zhang  Guang-Ren Duan  Ming-Da Ma 《Journal of The Franklin Institute》2019,356(4):1991-2014

In consideration of target angular velocity uncertainty and external disturbance, a modified dynamic output feedback sliding mode control (DOFSMC) method is proposed for spacecraft autonomous hovering system without velocity measurements. As a stepping-stone, an additional dynamic compensator is introduced into the design of sliding surface, then an augmented system is reconstructed with the system uncertainty and external disturbance. Based on the linear matrix inequality (LMI), a sufficient condition is given, which guarantees the disturbance attenuation performance of sliding mode dynamics. By introducing an auxiliary variable, a modified version of adaptive sliding mode control (ASMC) law is designed, and the finite-time stability of sliding variable is established by the Lyapunov stability theory. Compared with other results, the proposed method is less conservative and can decrease the generated control input force significantly. Finally, two simulation examples are performed to validate the effectiveness of the proposed method.  相似文献   

Stabilization of discrete-time switched singular systems with state,output and switching delays     

Jinxing Lin  Xudong Zhao  Min Xiao  Jingjin Shen 《Journal of The Franklin Institute》2019,356(4):2060-2089

This paper is concerned with state feedback stabilization of discrete-time switched singular systems with time-varying delays existing simultaneously in the state, the output and the switching signal of the switched controller. On the basis of equivalent dynamics decomposition and Lyapunov–Krasovskii method, exponential estimates for the response of slow states of the closed-loop subsystems running in asynchronous and synchronous periods are first given. Exponential estimates for the response of fast states are also provided by establishing an analytic equation to solve the fast states and using some algebraic techniques. Then, by employing the obtained exponential estimates and the piecewise Lyapunov function approach with average dwell time (ADT) switching, sufficient conditions for the existence of a class of stabilizing switching signals and state feedback gains are derived, which explicitly depend on upper bounds on the delays and a lower bound on the ADT. Finally, two numerical examples are provided to illustrate the effectiveness of the obtained theoretical results.  相似文献   

Strong delay-independent stability of linear delay systems     

Fúlvia S.S. de Oliveira  Fernando O. Souza 《Journal of The Franklin Institute》2019,356(10):5421-5433

This paper presents a new necessary and sufficient condition for testing the strong delay-independent stability of linear systems subject to a single delay. The proposed method follows from the use of matrix polynomials constraints and the Kalman–Yakubovich–Popov lemma. The resulting condition can be checked exactly by solving a feasibility problem in terms of a linear matrix inequality (LMI). Simple numerical examples are given to show the effectiveness of the proposed method.  相似文献   

Event-triggered synchronization of delayed neural networks with actuator saturation using quantized measurements     

Liuwen Li  Wenlin Zou  Shumin Fei 《Journal of The Franklin Institute》2019,356(12):6433-6459

This paper studies event-triggered synchronization control problem for delayed neural networks with quantization and actuator saturation. Firstly, in order to reduce the load of network meanwhile retain required performance of system, the event-triggered scheme is adopted to determine if the sampled signal will be transmitted to the quantizer. Secondly, a synchronization error model is constructed to describe the master-slave synchronization system with event-triggered scheme, quantization and input saturation in a unified framework. Thirdly, on the basis of Lyapunov–Krasovskii functional, sufficient conditions for stabilization are derived which can ensure synchronization of the master system and slave system; particularly, a co-designed parameters of controller and the corresponding event-triggered parameters are obtained under the above stability condition. Lastly, two numerical examples are employed to illustrate the effectiveness of the proposed approach.  相似文献