检索结果-内蒙古大学图书馆

Chinese control Conference (CCC)

作者： Li Qin Xiao-Jing Jia Cai-Feng Liu Fu-Cai Liu Key Lab of Industrial Computer Control Engineering Yanshan University Qinhuangdao Hebei CN

ISBN: (纸本)9781509009107

All space manipulators are debugged on the ground and on-orbit serviced in space. Compared with in ground gravity environment their friction characteristics in space microgravity environment have great changes. For sake of tracking the desired trajectory, in both ground and space, considering these characteristics, a friction compensation control method based on an Active Disturbance Rejection control (ADRC) is proposed and its effectiveness is validated on a planar 2-DOF free-floating space manipulator. The friction models and the dynamic models under different gravity environment have been derived based on the torque balance, the Kane equation and the Lagrange method. Particle Swarm Optimization (PSO) is put forward to optimize parameters of ADRC so as to improve the efficiency of designing process. Compared with PD controller in tracking simulation under different gravity environment, the results verify the advantage of the proposed improved control method.

关键词： Friction Aerospace electronics Gravity Manipulator dynamics Torque Mathematical model

来源：评论

学校读者我要写书评

暂无评论

Joint Relay Selection and Power Allocation in Underwater Cognitive Acoustic Cooperative System with Limited Feedback

Joint Relay Selection and Power Allocation in Underwater Cog...

引用

IEEE Conference on Vehicular Technology (VTC)

作者： Lei Yan Xinbin Li Kai Ma Jing Yan Song Han Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University Qin Huangdao China

ISBN: (纸本)9781509016990

We study the problem of joint relay selection and power allocation in a underwater cooperative system with multiple users assisted by multiple relays. Due to the harsh underwater environments, the channel state information (CSI) at the transmitter is imperfect, which leads to the performance degrading in the underwater cooperative acoustic system. Therefore, we analyze the cooperative underwater acoustic channel with limited feedback to increase the sum-rate of the system. Meanwhile, different from other researches, we do not only focus on the single system scenario, but also consider the presence of nearby acoustic activities and the problem of joint relay selection and power allocation is solved in a cognitive acoustic (CA) scenario. Thus the codebook of interference CSI and the codebook of quantized relay selection and power allocation strategy are designed, respectively. Simulation results show that a few bits feedback can significantly improve the performance of the CA cooperative acoustic system.

关键词： Relays Resource management Interference Algorithm design and analysis Cooperative systems Underwater acoustics

来源：评论

学校读者我要写书评

暂无评论

Passivity-Based control of Tower Vibration of Offshore Wind Turbines 34

Passivity-Based Control of Tower Vibration of Offshore Wind ...

引用

第三十四届中国控制会议

作者： REN Lina YANG Huanhuan LIU Shuangshuang LIU Fucai Key Lab of Industrial Computer Control Engineering of Hebei Yanshan University

ISBN: (纸本)9781467374439

Considering the influence of the tower vibration such as fore-aft/ side-to-side in the offshore wind turbine, the Passivity-based control(PBC) method is proposed to suppress the tower vibration based on the offshore Permanent Magnet Synchronous Generator(PMSG). The PCH model of the tower is established and the energy compensation of the system is adopted to increase the damping of the tower. In comparison with PID controller, the PBC method not only suppresses the vibration of the tower effectively while reduce the fatigue load of tower, but also reduces the influence of maximum capture of wind energy and the drive-train torsional vibration, stabilizing the output power of the generator. The effectiveness and superiority of the PBC method proposed is verified by the theoretical analysis and the simulations by comparing with PID.

关键词： Permanent Magnet Synchronous Generator(PMSG) fore-aft tower vibration side-to-side tower vibration PCH model Passivity-Based control(PBC) PID

来源：评论

学校读者我要写书评

暂无评论

Distributed containment control for multi-robot system based on binocular vision and RBF neural network

International Journal of Control and Automation

引用

International Journal of control and Automation 2015年第9期8卷 139-152页

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

Aiming at the distributed containment control problem for Multi-Robot system with dynamic leaders, we use binocular vision as the sensing device, so firstly, a binocular visual model for dynamic target is established by introducing the pseudo depth variable, and it is used to provide Real-Time status information for the followers. Then, in the case that each follower can only get information from part of the leaders, even individual follower can not get any information from the leaders directly, the topological relationship among robots is built by using the graph theory. Once more, RBF neural networks are employed to approximate the uncertainties in the system model of followers, and L2robust control laws are used to restrain the influences of the approximation errors. Finally, a simulation is carried out on multiple 2 Degrees-Of-Freedom (DOF) robots, and results validate the designed controllers can drive the followers converge to the convex hull spanned by the leaders asymptotically and realize synchronization motion ultimately. © 2015 SERSC.

关键词： Multipurpose robots

来源：评论

学校读者我要写书评

暂无评论

Vibration suppress of flexible spacecraft considering the effects of gravity 34

Vibration suppress of flexible spacecraft considering the ef...

引用

第三十四届中国控制会议

作者： GAO Juan-juan CHEN Xin JIA Xiao-jing LIU Fu-cai Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University

ISBN: (纸本)9781467374439

Considering that gravity on the ground alignment phase is different from that in space application phase, an adaptive backstepping sliding mode control method is proposed to achieve the attitude control and vibration suppression of the flexible spacecraft under different gravity environment. Fully considering the change of dynamic models, the sliding mode controller is designed according to the backstepping theory to control the flexible spacecraft under the influence of model and disturbances uncertainties, and the adaptive control laws are proposed to estimate the disturbances and gravity item online. The control strategy can guarantee the stability of the system based on the Lyapunov theory. The simulation results show that the controller is effective in attitude control and vibration suppression of the flexible spacecraft under different gravity environment, and has important value for theoretical research and engineering application.

关键词： Flexible spacecraft,Gravity,Vibration suppression,Backstepping sliding mode,Adaptive

来源：评论

学校读者我要写书评

暂无评论

Visualization of flatness pattern recognition based on T-S cloud inference network

引用

Journal of Central South University 2015年第2期22卷 560-566页

作者：张秀玲赵亮臧佳音樊红敏 Key Laboratory of Industrial Computer Control Engineering of Hebei Province (Yanshan University) National Engineering Research Center for Equipment and Technology of Cold Strip Rolling

Flatness pattern recognition is the key of the flatness control. The accuracy of the present flatness pattern recognition is limited and the shape defects cannot be reflected intuitively. In order to improve it, a novel method via T-S cloud inference network optimized by genetic algorithm(GA) is proposed. T-S cloud inference network is constructed with T-S fuzzy neural network and the cloud model. So, the rapid of fuzzy logic and the uncertainty of cloud model for processing data are both taken into account. What's more, GA possesses good parallel design structure and global optimization characteristics. Compared with the simulation recognition results of traditional BP Algorithm, GA is more accurate and effective. Moreover, virtual reality technology is introduced into the field of shape control by lab VIEW, MATlab mixed programming. And virtual flatness pattern recognition interface is ***, the data of engineering analysis and the actual model are combined with each other, and the shape defects could be seen more lively and intuitively.

关键词： pattern recognition T-S cloud inference network cloud model mixed programming virtual reality visual recognition

来源：评论

学校读者我要写书评

暂无评论

A novel observer design method for neural mass models

引用

Chinese Physics B 2015年第9期24卷 68-72页

作者：刘仙苗东凯高庆徐式蕴 Key Laboratory of Industrial Computer Control Engineering of Hebei Province Institute of Electrical EngineeringYanshan University China Electric Power Research Institute

Neural mass models can simulate the generation of electroencephalography（EEG） signals with different rhythms,and therefore the observation of the states of these models plays a significant role in brain research. The structure of neural mass models is special in that they can be expressed as Lurie systems. The developed techniques in Lurie system theory are applicable to these models. We here provide a new observer design method for neural mass models by transforming these models and the corresponding error systems into nonlinear systems with Lurie form. The purpose is to establish appropriate conditions which ensure the convergence of the estimation error. The effectiveness of the proposed method is illustrated by numerical simulations.

关键词： observer design neural mass model Lurie system theory

来源：评论

学校读者我要写书评

暂无评论

A hybrid algorithm based on teaching-learning-based optimization and newton method for solving nonlinear equations

引用

ICIC Express Letters 2016年第1期10卷 103-109页

作者： Li, Xia Niu, Peifeng Zhao, Litong Li, Guoqiang Liu, Jianping Key Lab of Industrial Computer Control Engineering of Hebei Province Yanshan University No. 438 West Hebei Avenue Qinhuangdao China Department of Mathematics and Information Science Hebei Normal University of Science and Technology No. 360 West Hebei Avenue Qinhuangdao China

Solving nonlinear equations is an important problem in engineering eld. Therefore, the study of ecient algorithm is of great signicance. Teaching-LearningBased Optimization (TLBO) has the advantages of simple algorithm, less parameters, strong global convergence ability and insensitivity to initial point, but it is weak at local optimization and slow later convergence. On the other hand, Newton method has the advantage of local deep search and fast convergence rate, but it is sensitive to the initial point. Therefore, considering advantages and disadvantages of two methods above, this paper proposes a hybrid algorithm (TNHA) based on the TLBO and Newton method for solving nonlinear equations. The hybrid algorithm both combines all these merits of the TLBO and Newton method but does not have the defects. Finally, numerical examples verify the eciency of the TNHA. © 2016 ICIC International.

关键词： Newton-Raphson method

来源：评论

学校读者我要写书评

暂无评论

Stability and Hopf bifurcation of a nonlinear electromechanical coupling system with time delay feedback

引用

Chinese Physics B 2015年第1期24卷 345-353页

作者：刘爽赵双双王兆龙李海滨 Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University

The stability and the Hopf bifurcation of a nonlinear electromechanical coupling system with time delay feedback are studied. By considering the energy in the air-gap field of the AC motor, the dynamical equation of the electromechanical coupling transmission system is deduced and a time delay feedback is introduced to control the dynamic behaviors of the system. The characteristic roots and the stable regions of time delay are determined by the direct method, and the relationship between the feedback gain and the length summation of stable regions is analyzed. Choosing the time delay as a bifurcation parameter, we find that the Hopf bifurcation occurs when the time delay passes through a critical value.A formula for determining the direction of the Hopf bifurcation and the stability of the bifurcating periodic solutions is given by using the normal form method and the center manifold theorem. Numerical simulations are also performed, which confirm the analytical results.

关键词： electromechanical coupling time delay Hopf bifurcation stability

来源：评论

学校读者我要写书评

暂无评论

Grazing bifurcation analysis of a relative rotation system with backlash non-smooth characteristic

引用

Chinese Physics B 2015年第7期24卷 279-287页

作者：刘爽王兆龙赵双双李海滨李建雄 Key Laboratory of Industrial Computer Control Engineering of Hebei Province Yanshan University National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University

Grazing bifurcation of a relative rotation system with backlash non-smooth characteristic is studied along with the change of the external excitation in this paper. Considering the oil film, backlash, time-varying stiffness and time-varying error, the dynamical equation of a relative rotation system with a backlash non-smooth characteristic is deduced by applying the elastic hydrodynamic lubrication（EHL） and the Grubin theories. In the process of relative rotation, the occurrence of backlash will lead to the change of dynamic behaviors of the system, and the system will transform from the meshing state to the impact state. Thus, the zero-time discontinuous mapping（ZDM） and the Poincare mapping are deduced to analyze the local dynamic characteristics of the system before as well as after the moment that the backlash appears（i.e.,the grazing state）. Meanwhile, the grazing bifurcation mechanism is analyzed theoretically by applying the impact and Floquet theories. Numerical simulations are also given, which confirm the analytical results.

关键词： relative rotation system backlash grazing bifurcation zero-time discontinuous mapping

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：