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作者： Du, Chunyan Xing, Guansheng Wu, Aiguo School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China School of Control Science and Engineering Hebei University of Technology Tianjin 300030 China

ISBN: (纸本)9789881725592

In this paper, a sliding mode controller is designed for a hydraulic press based on iterative approximation method. The nonlinear model of the hydraulic press is approached by a sequence of iterative linear time-varying systems, thus the control problem of the nonlinear system could be solved through these linear systems. Then a series of sliding controllers are designed for the sequence of linear time-varying approximations, these controllers will converge to a effective sliding mode controller of the original nonlinear system. Simulation results show that precise speed tracking could be achieved through this method. And when the bulk modulus and the reaction force change, the controller is robust. © 2011 Chinese Assoc of Automati.

关键词： controllers

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Strength analysis of 130t liquid iron tank shell

Strength analysis of 130t liquid iron tank shell

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International Conference on Electric Information and control engineering (ICEICE)

作者： Hongyu Liu Junqing Liu School of Mechanical Engineering and Automation Liaoning University of Science and Technology Anshan Liaoning China Department of Automatic Control Shenyang Institute of Engineering Shenyang Liaoning China

ISBN: (纸本)9781424480364

This paper took 130t liquid iron tank shell as research object. First, three dimensions solid model of 130t liquid iron tank shell model was constructed by ANSYS software. Then, relevant computation parameters were input, grid was divided, restriction and load were exerted. Finally, strength finite element analysis was made on 130t liquid iron tank shell finite element model under slow lifting working condition. The relevant equivalent stress distribution rule of liquid iron tank shell was found. 130t liquid iron tank shell can satisfy use under slow lifting working condition was proved. This research provides a scientific theory base for accurate design, reasonable weight loss and safe use of 130t liquid iron tank.

关键词： Iron Computational modeling Finite element methods Solid modeling Stress Analytical models Load modeling

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Hydraulic support entire strength research under four kinds of typical load working conditions

Hydraulic support entire strength research under four kinds ...

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International Conference on Mechanic automation and control engineering (MACE)

ISBN: (纸本)9781424494361

Hydraulic support is a key equipment of synthesis mechanization caving coal. Now, lots of countries in the world are increasing investment on hydraulic support design, manufacture and research. This paper took ZT6500/19.5/34 hydraulic support as an example. First, three dimensions solid model of the type simplified hydraulic support was constructed by three dimensions construction model software SolidWorks. Then, three dimensions solid model was led in ANSYS software. Finally, the strength test of the type hydraulic support was made under top beam both ends concentration load working condition, top beam torsion II working condition, top beam unbalance load working condition and top beam middle concentration load working condition by ANSYS software. The relevant total displacement distribution rule and equivalent stress distribution rule of the type simplified hydraulic support computation model were found. This research is benefit to the general optimal design and improvement on hydraulic support structure and strength before quantity production. This provides a practical and convenient research way on hydraulic support design and research.

关键词： Stress Load modeling Structural beams Computational modeling Finite element methods Employee welfare Solid modeling

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Phase-Based RMFDA Fault Diagnosis Method Using Bootstrap Technique

Phase-Based RMFDA Fault Diagnosis Method Using Bootstrap Tec...

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2011 International Conference on Mechanical engineering and Technology(ICMET 2011)

作者： Shu Wang Zhen Zhao Yu-qing Chang Fu-li Wang Information Science and Engineering School Northeastern University Key Laboratory of Integrated Automation of Process Industry Northeastern University School of Information & Control Engineering Liaoning University of Petroleum & Chemical Technology

The fault diagnosis performance of Fisher Discriminant Analysis(FDA) method is superior to Principle Component Analysis(PCA) by taking into account both normal and fault data for modeling. For the cases with insufficient fault data, a diagnosis strategy is developed based on Bootstrap and phase-based Recursive Multi-way Fisher Discriminant Analysis(RMFDA). By this method, modeling data was constructed by Bootstrap. Besides, the diagnosis information of the previous phase was introduced in the next phase for MFDA modeling by combining recursive method. The effectiveness of the proposed method is demonstrated by applying it to the hydraulic tube tester.

关键词： Bootstrap,sub phase,RMFDA,fault diagnosis

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Study on scheduling model and algorithm for inventory control of cold rolling line

Study on scheduling model and algorithm for inventory contro...

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World Congress on Intelligent control and automation (WCICA)

作者： Jun Zhao Wei Wang Fangjie Lou Zili Zhan Na Liu School of Control Science and engineering Dalian University of Technology Dalian Liaoning China Dalian Seasky Automation Company Limited Dalian Liaoning China

Considering the characteristics of cold rolling line, which is with a large number of product categories and complex production flow, the continuity of whole cold rolling line is mainly considered to establish an optimal scheduling model in this study on the basis of maintaining the order due time and the inventory control. A heuristic algorithm for solving the proposed scheduling model is designed, which adopts a reasonable combination between Tabu search and simulated annealing algorithm. For verifying the proposed model and its corresponding hybrid algorithm, the practical production data coming from Shanghai Baosteel Co. Ltd., China have been employed to implement the simulations. And the experiments results show that the proposed model and algorithm obtains remarkable effectiveness.

关键词： Job shop scheduling Algorithm design and analysis Optimal scheduling Coils Mathematical model Manufacturing

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Delay-independent stabilization of linear systems with multiple time-delays

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World Academy of science, engineering and Technology 2011年 51卷 1007-1011页

作者： He, Ping Lan, Heng-You Tan, Gong-Quan School of Automation and Electronic Information Sichuan University of Science and Engineering Zigong Sichuan 643000 China Department of Mathematics Sichuan University of Science and Engineering Zigong Sichuan 643000 China Research Institute of Information and Control Sichuan University of Science and Engineering Zigong Sichuan 643000 China

The multidelays linear control systems described by difference differential equations are often studied in modern control theory. In this paper, the delay-independent stabilization algebraic criteria and the theorem of delay-independent stabilization for linear systems with multiple time-delays are established by using the Lyapunov functional and the Riccati algebra matrix equation in the matrix theory. An illustrative example and the simulation result, show that the approach to linear systems with multiple time-delays is effective.

关键词： Matrix algebra

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Multiobjective fault detection observer design for a class of T-S fuzzy nonlinear systems

Multiobjective fault detection observer design for a class o...

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作者： Zhang, Dengfeng Han, Xiaodong Wang, Hong Wang, Zhiquan School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China Control Systems Centre University of Manchester M60 1QD Manchester United Kingdom Institute of Telecommunication Satellite China Academy of Space Technology Beijing 100094 China School of Automation Nanjing University of Science and Technology Nanjing 210094 China

This article presents the design of fault detection fuzzy observer with multiple performance constraints for a class of nonlinear system with Takagi-Sugeno fuzzy form. The multiobjective optimization and consistency analysis are applied to meeting the desirable transient behavior, steady output variance and H- index performance requirements. Thus, the rapidity of response to fault detection, robustness to noisy disturbances and sensitivity to faults are guaranteed simultaneously. One advantage of our design is that the determination of detection threshold makes full use of the information in the stage of observer design. Meanwhile, the multiple fuzzy Lyapunov function and the slack of variables are used for decreasing the conservatism of conventional single Lyapunove function method. Simulation results indicated the effectiveness of the proposed method. © 2011 Zhejiang University.

关键词： Fault detection

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Higher-order model-free adaptive control for a class of discrete-time SISO nonlinear systems

Higher-order model-free adaptive control for a class of disc...

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2011 China control and Decision Conference(2011中国控制与决策会议 CCDC)

作者： Shangtai Jin Zhongsheng Hou Ronghu Chi Advanced Control Systems Laboratory of School of Electronic and Information Engineering Beijing Jia Advanced ControlSystems Laboratory of School of Electronic and Information Engineering Beijing Jiaot School of Automation and Electrical Engineering Qingdao University of Science and Technology Qingd

A higher-order model-free adaptive control scheme is proposed for a class of discrete-time SISO nonlinear systems. The control scheme consists of the adaptive control law, parameter estimation law and reset mechanism. The controller design depends merely on the input and the output measurement data of the controlled plant. The proposed scheme can improve the control performance by using more error information derived from previous sampling time instants. The theoretical analysis shows that the proposed control scheme can guarantee the bounded input and bounded output (BIBO) stability. The simulation results further verify the effectiveness of the proposed control scheme.

关键词： Model-free adaptive control pseudo-partial derivative higher-order control scheme I/O data

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Effectiveness Research of Deep Brain Stimulation Operation for Patients with Parkinson's Disease Based on Polar Coordination System with Varied Origin

Effectiveness Research of Deep Brain Stimulation Operation f...

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2011 4th International Conference on Biomedical engineering and Informatics(第四届生物医学工程与信息学国际会议 BMEI 2011)

作者： Junzhong Zou Bei Wang Jian Zhang Min Wang Masatoshi Nakamura Department of Automation School of Information Science and Engineering East China University of Sci Department of Advanced System Control Engineering Saga University Saga 840-8502 Japan

Parkinson's disease (PD) is a common disease of central nervous system among the elderly, and its complex symptoms bring up some difficulties for the clinical diagnosis. And Deep Brain Stimulation (DBS) is an effective treatment method for patients with Parkinson's disease. In this study, a method based on polar coordination system with varied origin was proposed to quantitatively evaluate the availability of DBS operation for patients with Parkinson's disease. Totally, seven patients with Parkinson's disease were participated in the spiral drawing experiment and their scores under Unified Parkinson's disease Rating Scale (UPDRS) were also recorded. According to the characteristics of hand movement in spiral drawing, a set of parameters were defined and calculated before and after DBS operation. Compared with the UPDRS scores, experimental results showed that this method of evaluation was consistent with the clinical diagnosis. The proposed method based on polar coordinate system with varied origin is effective in clinical diagnosis, and it provides a basis for quantitative evaluating the effectiveness of surgery and treatment.

关键词： Parkinson's disease Polar coordinate system with varied origin Deep brain stimulation operation Unified Parkinson's Disease Rating Scale Quantitative effectiveness evaluation

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Discrete-time adaptive iterative learning control for permanent magnet linear motor

Discrete-time adaptive iterative learning control for perman...

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IEEE Conference on Cybernetics and Intelligent Systems

作者： Shangtai Jin Zhongsheng Hou Ronghu Chi Yongqiang Li Advanced Control Systems Laboratory of School of Electronic and Information Engineering Beijing Jiaotong University BJTU Beijing China School of Automation and Electrical Engineering Qingdao University of Science and Technology Qingdao China

A discrete-time adaptive iterative learning control approach (DAILC) is presented for improving the permanent magnet linear motor velocity tracking performance. The learning gain can be updated iteratively along the learning axis and pointwisely along the time axis. When the initial states are random and the reference trajectory and disturbance are iteration-varying, the DAILC can achieve the pointwise convergence over a finite time interval asymptotically along the iterative learning axis. The theoretical analysis and simulation results further verify the effectiveness of the proposed approach.

关键词： Trajectory Permanent magnet motors Permanent magnets Force Target tracking Convergence Pi control

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