Output regulation problem of a class of pure-feedback nonlinear systems via adaptive neural control     

Fujin Jia  Junwei Lu  Yongmin Li 《Journal of The Franklin Institute》2021,358(11):5659-5675

In the paper, a control algorithm for output regulation problem of nonlinear pure-feedback systems with unknown functions is proposed. The main contributions of the proposed method are not only to avoid Assumptions of unknown functions, but also adopt a non-backstepping control scheme. First, a high-gain state observer with disturbance signals is designed based on the new system that has been converted. Second, an internal model with the observer state is established. Finally, based on Lyapunov analysis and the neural network approximation theory, the control algorithm is proposed to ensure that all the signals of the closed-loop system are the semi-globally uniformly ultimately bounded, and the tracking error converges to a small neighborhood of the origin. Three simulation studies are worked out to show the effectiveness of the proposed approach.  相似文献   

Distributed finite-time adaptive consensus tracking control for multiple AUVs with state constraints     

《Journal of The Franklin Institute》2021,358(17):9158-9177

Aiming at the consensus tracking control problem of multiple autonomous underwater vehicles (AUVs) with state constraints, a new neural network (NN) and barrier Lyapunov function based finite-time command filtered backstepping control scheme is proposed. The finite-time command filter is utilized to filtering the virtual control signal, the error compensation signal is constructed to eliminate filtering error due to the use of filter, and the NN approximation technology is used to deal with the unknown nonlinear dynamics. The control scheme can guarantee that the consensus tracking errors of position states converge into the desired neighborhood of the origin in finite-time while not exceeding the predefined constraints. Finally, simulation studies prove the feasibility of proposed control algorithm.  相似文献   

时机选择、追赶陷阱与企业能力重构     

臧树伟  张娜娜 《科研管理》2021,42(9):87-93

      后发企业在追赶过程中如何选择最佳追赶时机、如何规避追赶陷阱、如何进行能力重构等问题一直是学界和业界关注的焦点。本文采用案例研究方法,通过剖析一家芯片企业过去15年间的成败得失,对上述问题进行逐一解答。研究发现：市场需求状况、市场分层结构、技术迭代速率、技术获取成本、产业分工体系、产业知识流动等时机因素在后发企业快速崛起和高速发展过程中发挥着重要的作用。研究还发现：组织惯性陷阱、创新范式陷阱、品牌低端化陷阱是后发企业在追赶过程中所面临的主要陷阱,企业要想规避上述陷阱,需要从组织学习、组织保障、创新协同、创新来源、品牌定位、品牌维护等方面寻求相应的对策和方案。上述研究发现丰富了现有后发追赶理论体系,同时,为处在探索和追赶之中的中国后发企业提供了宝贵的经验和借鉴。  相似文献   

我国图书版权贸易可持续发展的优势分析     

刘勋 《科教文汇》2011,(3):199-200

文章从＂国内经济、政治要素,国际化要素,政府管理要素和人力资源要素＂四大因素入手,分析了影响我国图书版权贸易之利弊,并使用贸易优势指标和国际市场占有量指标进行了定量分析。  相似文献   

青岛市建设全国蓝色经济领军城市的成效和启示     

于忠珍 《青岛教育学院学报》2014,(4):13-17

青岛市提出建设“全国蓝色经济领军城市”的目标,是基于自身具有的发展蓝色经济的优势和国家战略支持的良好背景。近年来,青岛市通过规划引领、功能区带动、产业支撑、创新驱动和环境营造等举措着力建设蓝色经济领军城市,在蓝色经济发展、海洋经济功能区建设、蓝色城市影响力和知名度等方面取得了明显的成效,产生了较大的影响,也带来了一些启示。  相似文献   

基于公共服务的海上旅游发展问题研究——以青岛市为例     

丁金胜 《青岛教育学院学报》2014,(5):14-19

海上旅游具有重要的经济价值、社会价值和个人价值,是我国滨海城市竞相发展的新兴产业部门。青岛市虽然在海上观光和游艇等项目上取得了一定的进展,但基础设施较薄弱、产品体系不够完善、管理尚不到位、专业人才缺乏等问题还比较突出。对此,政府可在＂公共服务＂上着力,应加强海上旅游基础设施建设,完善海上旅游产品体系,提升海上旅游的管理水平,完备海上旅游营销系统,保护海洋生态环境,培养海上旅游人才,以推动青岛市海上旅游业持续健康地发展。  相似文献   

浅析《郑氏规范》的家庭管理思想     

董亚薇 《湖州师范学院学报》2014,(7):51-55

被朱元璋旌表为“江南第一家”的浦江郑氏家族,因其系统的治家思想和传世家训《郑氏规范》而被世人熟知。《郑氏规范》所体现的家庭管理思想,包括精细的家庭分工、勤俭持家的家庭理财思想、睦邻济贫的济世情怀以及为家族长远发展考虑的忧患意识等,对古代家庭管理思想研究,乃至今天的家庭管理、人际交往、居家理财、为人处世等,及扩展至社会和谐气氛的构建等方面都具有深远的意义。  相似文献   

Extended dissipative control for interval type-2 singular systems with nonhomogeneous Markovian switching     

《Journal of The Franklin Institute》2022,359(1):415-438

This paper investigates the problems of stochastic admissibility and extended dissipativity analysis as well as state feedback controller design for interval type-2 singular systems with nonhomogeneous Markovian switching. By utilizing matrix decomposition technique to deal with the time-dependent transition rates, a sufficient condition is established to guarantee that the systems under consideration are regular, impulse-free, stochastically asymptotically stable and extended dissipative. For developing the state feedback controller in light of the obtained sufficient condition, a novel lemma is proposed inspired by Projection lemma, based on which an approach of controller design is provided. It should be pointed out that no conservatism is introduced in controller design due to the sufficiency and necessity of this lemma. Finally, simulation examples are provided to show the effectiveness of the proposed approach.  相似文献   

Matrix approach to verification of finite multi-potential games     

《Journal of The Franklin Institute》2022,359(5):2229-2243

This paper studies the verification of multi-potential games with a given partition, and proposes a kind of multi-potential equation based on semi-tensor product of matrices. Firstly, the basis of each player’s potential function is constructed, based on which, a new formula is established for the calculation of each player’s potential function. Secondly, a new potential equation is proposed for the verification of potential games via each player’s potential function. Using the new potential equation, a kind of multi-potential equation is constructed for the verification of multi-potential games with a given partition. It is proved that a finite game is a multi-potential game with a given partition if and only if the multi-potential equation has solution. In addition, all possible potential functions are obtained for each group of the partition. An illustrative example is worked out to show the effectiveness of the obtained new results.  相似文献   

A robust predictive observer-based integral control law for uncertain LTI systems under external disturbance     

《Journal of The Franklin Institute》2022,359(13):6915-6938

The integral control is an effective way to track non-zero constant reference. In this paper, to utilize a robust predictive integral control strategy in the output-feedback case, the control requirement and the goals are formulated in a suitable form. Then, by introducing a novel matrix transformation, the controller designing issue is translated into an optimization problem subjected to some constraints. Such constraints are represented in terms of linear matrix inequality (LMI). By solving a minimization problem, the gains of the integral controller are determined and updated at some time instants. Finally, several numerical simulations are given to evaluate the advantages of the suggested robust control method over similar ones. The outcomes confirm the superiority of the proposed idea compared to the existing approach.  相似文献