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Finite-time boundedness analysis and composite anti-disturbance control for uncertain semi-Markovian jump systems with time delay

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Science China(Information Sciences) 2022年第4期65卷 275-277页

作者： Tianbo XU xianwen gao Wenhai QI College of Information Science and Engineering Northeastern University School of Engineering Qufu Normal University

Dear editor,Markovian jump systems(MJSs) are a special type of hybrid systems that have been employed to yield a variety of results [1, 2]. Unlike MJSs, semi-Markovian jump systems(S-MJSs) relax the restriction requiring transition rate(TR) to always be constant. Due to their broad application prospects, S-MJSs have attracted the attention of many scholars. For example, the authors of [3, 4] addressed the problem of sliding mode control for S-MJSs. However,

关键词： semi-Markovian jump systems time delay finite-time boundedness composite anti-disturbance control uncertain system

Using the curve moment and the PSO-SVM method to diagnose downhole conditions of a sucker rod pumping unit

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Petroleum Science 2013年第1期10卷 73-80页

作者： Li Kun gao xianwen Tian Zhongda Qiu Zhixue College of Information Science and Engineering Northeastern University

Downhole working conditions of sucker rod pumping wells are automatically identified on a computer from the analysis of dynamometer cards. In this process, extraction of feature parameters and pattern classification are two key steps. The dynamometer card is firstly divided into four parts which include different production information according to the ＂four point method＂ used in actual oilfield production, and then the moment invariants for pattern recognition are extracted. An improved support vector machine （SVM） method is used for pattern classification whose error penalty parameter C and kernel function parameter g are optimally chosen by the particle swarm optimization （PSO） algorithm. The simulation results show the method proposed in this paper has good classification results.

关键词： Sucker rod pumping unit diagnosis of downhole conditions dynamometer card curvemoment support vector machine particle swarm optimization

Summary of Detection and Location for Oil and Gas Pipeline Leak

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Summary of Detection and Location for Oil and Gas Pipeline L...

第25届中国控制与决策会议

作者： Wang Lina Wang Jian gao xianwen Wang Mingshun School of Information Science and Engineering Northeastern University Shenyang Shallow Sea Oil Development Company Technology Research Institute of Liaohe Oilfield

ISBN: (纸本)9781467355339

This thesis introduces detection and location methods about oil and gas pipelines leak comprehensively in recent years. It introduces the domestic and foreign development situation about oil and gas pipelines leak;Based on the hardware and software method this essay introduces research results about methods of fault diagnosis of oil and gas pipeline in detail;also, points out the developing direction of leak detection and location techniques is described.

关键词： oil and gas pipelines leak detection leak location

Research on integrated modeling method and maximum power point tracking control of photovoltaic systems

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Research on integrated modeling method and maximum power poi...

第25届中国控制与决策会议

作者： Shaowu Li xianwen gao Yuchang Feng Nan Hu School of Information Engineering Hubei Institute for Nationalities College of Information Science and Engineering Northeastern university

ISBN: (纸本)9781467355339

To improve the energy sources efficiency, maximum power point tracking （MPPT） is usually used in the control of photovoltaic （PV） systems and is implemented by the buck converter, the boost converter and the buck-boost converter. In this article, through studying deeply the output current-voltage（V-I） characteristic of solar photovoltaic and the mathematic model of three basic DC/DC converters, an integrated modeling method interpreting the theoretical relationship between the output power and the control signal has been proposed by using MATALB software. After building the integrated model, the ranges of output loads of PV MPPT systems with the three different DC/DC converter have been studied respectively. Finally, the three integrated MATLAB models have been built and the experimental studies have been conducted respectively. The results of simulation experiments have shown the feasibility, availability and convenience of research on MPPT control of PV systems by using this integrated modeling method.

关键词： MATLAB PV systems integrated modeling method MPPT control DC/DC converter

基于和声搜索优化多T-S模糊神经网络的聚合釜过程软测量建模

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仪器仪表学报 2011年第3期32卷 495-500页

作者：高淑芝高宪文王介生东北大学信息科学与工程学院沈阳110819 沈阳化工大学信息工程学院沈阳110142

根据多个模型相加可以提高整体预测精度和鲁棒性的思想,提出一种基于模糊C均值聚类算法的多T-S模糊神经网络模型对聚氯乙烯(polyvinylchlorid,PVC)聚合生产过程中的氯乙烯(vinyl chloride monomer,VCM)转化率和转化速率进行预测。首先... 详细信息

根据多个模型相加可以提高整体预测精度和鲁棒性的思想,提出一种基于模糊C均值聚类算法的多T-S模糊神经网络模型对聚氯乙烯(polyvinylchlorid,PVC)聚合生产过程中的氯乙烯(vinyl chloride monomer,VCM)转化率和转化速率进行预测。首先采用主元分析来对软测量模型的辅助变量进行选择以降低模型维数,并提出和声搜索和最小二乘法相结合的混合优化算法来优化T-S模糊神经网络子模型的结构参数。仿真结果表明该模型能够显著提高PVC聚合过程中经济技术指标预测的精度和鲁棒性,可以满足聚合釜生产过程的实时控制要求。

关键词：聚合釜多T-S模糊神经网络主元分析软测量和声搜索

Disturbance-observer-based control for Markovian jump systems with saturation nonlinearity

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Disturbance-observer-based control for Markovian jump system...

第30届中国控制与决策会议

作者： Qian gao xianwen gao Wenhai Qi School of Information Science and Engineering Northeastern University School of Engineering Qufu Normal University

This paper is concerned with disturbance-observer-based control（DOBC） for Markovian jump systems（MJSs） with saturation nonlinearity. Firstly, by constructing an appropriate mode-dependent stochastic LyapunovKrasovskii functional, the anti-disturbance controller design method is proposed such that the resulting closed-loop system with saturation nonlinearity is stochastically stable. Then, the desired observer design, the controller design,and the estimate of the domain of attraction are presented by solving a convex optimization problem with linear matrix inequalities. Finally, simulation results illustrate the effectiveness of the proposed schemes.

关键词： disturbance-observer-based control Markovian jump systems domain of attraction linear matrix inequalities

光伏系统的一种VWP区间模糊MPPT控制策略

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太阳能学报 2016年第5期37卷 1167-1173页

作者：李绍武高宪文东北大学信息科学与工程学院沈阳110819 湖北民族学院科技学院恩施445000

在优化光伏系统最大功率跟踪(maximum power point tracking,MPPT)快速性、准确性和平稳性的同时,为简化模糊控制器的设计,提出一种可变天气参数(variable weather parameters,VWP)区间模糊MPPT控制策略。该策略以理想最大功率点(maximu... 详细信息

在优化光伏系统最大功率跟踪(maximum power point tracking,MPPT)快速性、准确性和平稳性的同时,为简化模糊控制器的设计,提出一种可变天气参数(variable weather parameters,VWP)区间模糊MPPT控制策略。该策略以理想最大功率点(maximum power point,MPP)所对应的控制量为中心建立一个VWP区间并将MPP的寻优范围限制在该区间内,可明显提高跟踪的快速性,同时通过减小模糊控制器的寻优步长保证搜索的准确性和平稳性。最后,仿真实验显示该控制策略的良好运行性能,验证该控制策略有比扰动观察法更好的MPPT暂态性能。

关键词：光伏系统模糊控制最大功率跟踪 VWP区间

Motor Power Based Inversion of Dynamometer Cards Using Hybrid Model

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Motor Power Based Inversion of Dynamometer Cards Using Hybri...

第32届中国控制与决策会议

作者： Dezhi Hao xianwen gao Xianyu Li School of Information Science and Engineering Northeastern University School of Automation and Electrical Engineering Shenyang Ligong University

The dynamometer card sensors’ poor real-time performance and high maintenance costs limit the control and diagnosis for sucker rod pumps（SRP） in oil exploitation. The motor which is the power source of the whole pumping process can reflect the working state of the entire equipment. The motor power can be accessed easily and ***, this paper proposes a method to measure the dynamometer cards based on the motor power. Firstly, a mathematical function relationship between the polished rod load and the motor power is established by fully considering many crucial factors in this process. Moreover, the data is compensated by the support vector machine for the top and bottom dead centers and the error of the mechanism model. At last, the proposed method is validated by a set of motor power data collected from wells by a self-developed device. The experimental result demonstrates the effectiveness of the proposed method for the inversion.

关键词： Sucker Rod Pump Dynamometer Card Motor Power Hybrid Modeling

Controllability of uncertain polynomial fuzzy singular systems

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Controllability of uncertain polynomial fuzzy singular syste...

第三十九届中国控制会议

作者： Bo Pang xianwen gao Xiang Sheng College of Information Science and Engineering Northeastern University Mechanical engineering University of Victoria

This paper considers I-controllability, R-controllability and C-controllability of uncertain nonlinear singular *** polynomial fuzzy model is constructed for uncertain to eliminate the upper and lower bounds restriction of states in the system and reduce the calculation quantity. Sufficient conditions, based on a polynomial fuzzy model, are proposed to guarantee the controllability of the system. Finally, an example is performed to verify the merits of the method proposed.

关键词： Controllability Singular System Polynomial Fuzzy System