检索结果-内蒙古大学图书馆

Parameter estimation and control for a neural mass model based on the unscented Kalman filter

Physical Review E 2013年第4期88卷 042905-042905页

作者： Xian Liu Qing Gao Key Lab of Industrial Computer Control Engineering of Hebei Province Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 China

Recent progress in Kalman filters to estimate states and parameters in nonlinear systems has provided the possibility of applying such approaches to neural systems. We here apply the nonlinear method of unscented Kalman filters (UKFs) to observe states and estimate parameters in a neural mass model that can simulate distinct rhythms in electroencephalography (EEG) including dynamical evolution during epilepsy seizures. We demonstrate the efficiency of the UKF in estimating states and parameters. We also develop an UKF-based control strategy to modulate the dynamics of the neural mass model. In this strategy the UKF plays the role of observing states, and the control law is constructed via the estimated states. We demonstrate the feasibility of using such a strategy to suppress epileptiform spikes in the neural mass model.

关键词： PARAMETER estimation MATHEMATICAL models ELECTROENCEPHALOGRAPHY KALMAN filtering EPILEPSY NONLINEAR systems

来源：评论

学校读者我要写书评

暂无评论

Research and application of flatness control for tandem cold rolling 37

Research and application of flatness control for tandem cold...

引用

37th Chinese control Conference, CCC 2018

作者： Xiaogang, Li Yiming, Fang Le, Liu Yanshan University Key Lab of Industrial Computer Control Engineering of Hebei Province Qinhuangdao066004 China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Qinhuangdao066004 China

ISBN: (纸本)9789881563941

Compound wave defect occurs in flatness during tandem cold rolling when high-end automobile and household appliance plate are produced, which has several impact on line speed and quality of final product. In this paper, a further research is done on sourcing cause of formation for the flatness defect. In combination with adjusting actuators and automatic flatness control principles, Achieving target flatness by rolls tilting, work rolls bending, middle rolls bending, and section cooling control. Adjustment control output of tilting, work rolls and middle rolls bending are calculated by the least square method. Section cooling control output of rolling is calculated by the typical fuzzy control theory. The least square method and fuzzy control algorithm are optimized so as to enhance control accuracy of automatic flatness, and at the same time largely improve flatness of steel strip, reduce working strength of operators and improve production efficiency of production line. © 2018 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Fuzzy control

来源：评论

学校读者我要写书评

暂无评论

Prediction of chaotic time series based on interval type-2 T-S fuzzy system

引用

Journal of Computational Information Systems 2014年第13期10卷 5403-5412页

作者： Wang, Shu'en Dou, Jinmei Liu, Yan Liu, Fucai Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao China

Fuzzy model based chaotic time series prediction has been extensively studied. However, traditional type-1 fuzzy system, whose membership functions are type-1 fuzzy set, has its limitation in handling uncertainties. Type-2 fuzzy system, whose membership functions are type-2 fuzzy set, has more adaptable parameters and design degree of freedom, making it more powerful in dealing with nonlinear and uncertain problems. In this paper, the interval type-2 fuzzy system, whose fuzzy space is divided by mesh diagonal method and consequent parameters are adapted by the forgetting factor recursive least square method while previous parameters remain unchanged, is applied to modeling and prediction of chaotic time series. Finally, the proposed scheme is tested by prediction of Mackey-Glass chaotic time series in case of noise free and noise condition, the simulation results show that the proposed scheme has a higher prediction accuracy and is powerful in handling uncertainties. © 2014 by Binary Information Press

关键词： Forecasting

来源：评论

学校读者我要写书评

暂无评论

Distributed containment control with dynamic leaders based on binocular vision

引用

Journal of Information and Computational Science 2015年第4期12卷 1319-1327页

作者： Shao, Nuan Li, Huiguang Liu, Le Li, Guoyou Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao China

In this paper, we study the distributed containment control problem for multi-robot system with dynamic leaders in the presence of parametric uncertainties. The binocular vision system is used as the sensing device to provide real-time status information for the followers, so firstly, a new binocular visual model for dynamic target is established. Then RBF neural networks are employed to approximate the unknown nonlinear functions in the system model of followers, and the approximated values are introduced into the designed sliding mode controllers to make compensation. Finally, simulation results are presented to show the validity of the proposed control strategy. ©, 2015, Binary Information Press

关键词： Multipurpose robots

来源：评论

学校读者我要写书评

暂无评论

The inverse kinematics analysis of the novel 6-DOF parallel mechanism

The inverse kinematics analysis of the novel 6-DOF parallel ...

引用

International Conference on Machine Learning and Cybernetics

作者： Wang, Hong-Rui Wang, Qing-Quan Alexander, Malikov Liu, Xiu-Ling Dong, Bin Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qin Huang Dao 066004 China Lab of Electronic and Information Engeering Hebei University Baoding 071002 China Kazan State Technical University Kazan Russia

ISBN: (纸本)9781424465262

In this paper, we present the inverse kinematical of a novel 6-DOF orthogonal parallel mechanism. The displacements Δli (i=1,...,6) of steering gears were deduced from the position and orientation of the moving platform. The desired trajectory was assumed to be more complex nonlinear curves, simulations are performed for the real time trajectory tracking of the mechanism. By using Matlab software, the analysis and simulation of mechanism can be carried out conveniently, and the efficiency of the design can be upgraded. The simulation curves of each displacement were provided and analyzed though simulative research. The results will be used for synthesis of the control law in the form of error feedback, and measurements results of actual movements by means of sensors. The analysis can help to realize the trajectory tracking control fast and accurately. © 2010 IEEE.

关键词： Inverse kinematics

来源：评论

学校读者我要写书评

暂无评论

Hopf Bifurcation Hybrid control Strategy for Mill Main Driving System Under Unsteady Lubrication

SSRN

引用

SSRN 2022年

作者： Liu, Shuang Meng, Qingfu Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Hebei066004 China Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Mr Hebei066004 China

Aiming at the vibration behavior of the main driving system of rolling mill when the lubrication condition changes, the Hopf bifurcation phenomenon of the system under unsteady lubrication condition is analyzed, and an improved hybrid control strategy is proposed to suppress the vibration of rolling mill. Firstly, according to the variation law of lubrication conditions in rolling process, the dynamic rolling moment of the main drive system under unsteady lubrication was given, and the torsional vibration mechanical model of the main drive system was established, and the Hopf bifurcation behavior of the system under boundary lubrication was analyzed. It is found that when the subcritical Hopf bifurcation occurs in the system, the main transmission system of the linker will experience sudden and destructive instability oscillations. Therefore, this paper proposes an improved hybrid control strategy to control the Hopf bifurcation behavior of the system. The traditional hybrid control strategy uses a single control parameter to control both parameter disturbance and state feedback. Here, two control parameters are used to control parameter disturbance and state feedback respectively. In the state feedback part, nonlinear feedback is used to replace the traditional linear feedback. After the control is added, the critical value of Hopf bifurcation can be changed and the stability region of the system can be increased by adjusting the control parameters of the disturbance part of the parameters. Here, direct Normal form calculation method is introduced to calculate the Hopf bifurcation specification of the system. By adjusting the control parameters of the state feedback part by the canonical coefficient, the system can be changed from subcritical bifurcation to supercritical bifurcation, the phase trajectory of the system can be changed from unstable limit cycle to stable limit cycle, and the amplitude of limit cycle can be controlled. The effectiveness of the proposed

关键词： Lubrication

来源：评论

学校读者我要写书评

暂无评论

Hybrid neural network based on ART2 - BP information fusion control in Circulating Fluidized Bed Boiler (CFBB)

Hybrid neural network based on ART2 - BP information fusion ...

引用

5th International Conference on Advances in Brain Inspired Cognitive Systems, BICS 2012

作者： Niu, Peifeng Ma, Yunfei Li, Pengfei Zhang, Yang Li, Guoqiang Zhang, Xiangye Key Lab. of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 China National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Qinhuangdao 066004 China

ISBN: (纸本)9783642315602

Circulating Fluidized Bed Boiler (CFBB) involves a kind of combustion boiler that can clean and desulfurize the coal efficiently in the combustion process. It is highly adapted to all kinds of high quality coals and low grade coals. CFB boiler has more superior performance, features and a wide range of applications than other boilers, accordingly, problems on automatic control underlined in the combustion process blocked its wide application. This is a typical thermal object, hard to control,and due to the special combustion type of CFBB that makes it a great inertia, multivariable, strong coupling, nonlinear, time-varying object. This paper designs an ART2-BP-BP Hybrid Neural Network of fusion cluster control system and completes data fusion from the data level, the feature level to the decision level. Results of simulation show that the control system in this paper is feasible and effective, in particular, the control system still has more satisfactory control effects in the case of a variety of sensor failures. © 2012 Springer-Verlag.

关键词： control systems

来源：评论

学校读者我要写书评

暂无评论

Output feedback control for T-S fuzzy models with unknown inputs

Output feedback control for T-S fuzzy models with unknown in...

引用

World Congress on Intelligent control and Automation (WCICA)

作者： Jianxiong Li Yiming Fang Chunyang Hu Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao Hebei Province China

This paper proposes an observer-based controller to stabilize Takagi-Sugeno (T-S) fuzzy models with unknown inputs, in which the unknown inputs need not satisfy the so-called observer matching condition. Firstly, an unknown input observer (UIO) is constructed to estimate the system states and unknown inputs, the observer gains are given in linear matrix inequality (LMI) terms. The controller is then developed under the framework of backstepping design, and a first-order filter is employed in each step of the recursive structure. The system stability is investigated based on the Lyapunov theory, and uniform boundedness property of the closed loop system is achieved. Finally, numerical simulation results are presented to illustrate the effectiveness of the proposed method.

关键词： Observers Output feedback Backstepping Numerical models Mathematical model Estimation error Closed loop systems

来源：评论

学校读者我要写书评

暂无评论

Bearing condition monitoring and fault diagnosis of a wind turbine using parameter free detection

引用

2011 International Conference on Electric and Electronics, EEIC 2011

作者： Yang, Shenggang Li, Xiaoli Liang, Ming Key Lab. of Industrial Computer Control Engineering of Hebei Province Institute of Electrical Engineering Yanshan University Qinhuangdao 066004 China Department of Mechanical Engineering University of Ottawa 770 King Edward Avenue Ottawa ON Canada

ISBN: (纸本)9783642217616

The most frequently used component of a wind turbine is bearing which failure could lead to malfunction and ultimately complete stall in a mission-critical equipment. Hence, bearing fault detection is an imperative part of preventive maintenance procedures in a wind turbine. This paper presents a free parameter approach to implement bearing condition monitoring and fault diagnosis. This approach extracts the amplitude and frequency modulations of faulty vibration signals that measured from a wind turbine system. The amplitude demodulation is inherent, and the fault frequency will be detected from the spectrums of the signal. The effectiveness of this approach has been validated by using simulated signal and experimental evaluation. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Fault detection

来源：评论

学校读者我要写书评

暂无评论

Predictive Cruise control for Connected Autonomous Vehicles Considering Communication Delay in Mixed Traffic

引用

IFAC-PapersOnLine 2024年第29期58卷 172-177页

作者： Xinyu Li Jin Zhang Jiaqi Xue Lin Qi Wenbin Tang Xiaohong Jiao Institute of Electrical Engineering Yanshan University Qinhuangdao China Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qinhuangdao 066004 Hebei Province China

The stochastic behaviors of human-driven vehicles (HDVs) and the communication delay of Vehicle-to-Everything (V2X) technique present challenges to the advancement of connected autonomous vehicles (CAVs) in mixed traffic comprising CAVs, uncertain numbers of HDVs and connected HDVs (CHDVs). Consequently, a predictive cruise control strategy based on V2X communication is proposed for CAVs in a mixed platoon. Firstly, a long-short-term memory (LSTM) network combined with a conditional linear Gaussian (CLG) model is adopted for speed prediction of the preceding vehicle considering the communication delay. Subsequently, the CAV's speed planning is conducted for passing continuous signalized intersections without stopping. Then, the planned speed is tracked in energy-efficient, safe, and comfortable manners under a stochastic model predictive control (SMPC) framework. The simulation results validate the effectiveness and advantages of the proposed strategy.

关键词： Connected autonomous vehicles Mixed traffic Communication delay Predictive cruise control

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：