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2nd International Conference on Precision Mechanical Instruments and Measurement technology, ICPMIMT 2014

作者： Yu, Li Ge Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Jiangnan University Wuxi China

ISBN: (纸本)9783038351948

This paper introduces a kind of spectral data acquisition system based on the linear CCD. The spectral acquisition circuit, data conversion and storage circuit were designed. The synchronization of the spectral data acquisition, data conversion and storage were achieved using VHDL. Finally, the spectrum contained noise is processed by the wavelet denoising theory. The experimental results show that the proposed scheme is feasible. © (2014) Trans Tech Publications, Switzerland.

关键词： Digital storage

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Fuzzy [Formula: see text] output-feedback control for the discrete-time system with channel fadings, sector nonlinearities, and randomly occurring interval delays and nonlinearities

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Advances in difference equations 2016年第1期2016卷 267页

作者： Xiaozheng Fan Yan Wang Manfeng Hu School of Science Jiangnan University Wuxi 214122 China. School of Internet of Things Jiangnan University Wuxi 214122 China. Key Laboratory of Advanced Process Control for Light Industry Ministry of Education Institute of Automation Jiangnan University Wuxi 214122 China.

In this paper, the fuzzy [Formula: see text] output-feedback control problem is investigated for a class of discrete-time T-S fuzzy systems with channel fadings, sector nonlinearities, randomly occurring interval delays (ROIDs) and randomly occurring nonlinearities (RONs). A series of variables of the randomly occurring phenomena obeying the Bernoulli distribution is used to govern ROIDs and RONs. Meanwhile, the measurement outputs are subject to the sector nonlinearities ( the sensor saturations) and we assume the system output is [Formula: see text], [Formula: see text]. The th-order Rice model is utilized to describe the phenomenon of channel fadings by setting different values of the channel coefficients. The aim of this work is to deal with the problem of designing a full-order dynamic fuzzy [Formula: see text] output-feedback controller such that the fuzzy closed-loop system is exponentially mean-square stable and the [Formula: see text] performance constraint is satisfied, by means of a combination of Lyapunov stability theory and stochastic analysis along with LMI methods. The proposed fuzzy controller parameters are derived by solving a convex optimization problem via the semidefinite programming technique. Finally, a numerical simulation is given to illustrate the feasibility and effectiveness of the proposed design technique.

关键词： Takagi-Sugeno (T-S) fuzzy system channel fadings fuzzy [Formula: see text] output-feedback control randomly occurring interval delays (ROIDs) randomly occurring nonlinearities (RONs) sector nonlinearities

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Observer-Based control for State Estimation of Uncertain Fuzzy Neural Networks With Time-Varying Delay 33

Observer-Based Control for State Estimation of Uncertain Fuz...

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第三十三届中国控制会议

作者： LOU Xuyang YE Qian CUI Baotong Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Jiangnan University School of IoT Engineering Jiangnan University Wuxi Institute of Technology

ISBN: (纸本)9781479947249

By ordinary Takagi-Sugeno(TS) fuzzy models, complex nonlinear systems can be represented to a set of linear submodels by using fuzzy sets and fuzzy reasoning. This paper is concerned with the problem of observer-based state estimation for fuzzy neural networks(FNNs) with time-varying structured uncertainties and time-varying delay. The problem addressed is to estimate the neuron states, through available output measurements, such that the dynamics of the estimation error is globally exponentially stable. An effective linear matrix inequality approach is developed to solve the neuron state estimation *** particular, we derive the conditions for the existence of the desired estimators of the delayed neural networks for all admissible parametric uncertainties. The designed controller simultaneously contains both the current state information and nonlinear disturbances on the network outputs and can be derived by solving a linear matrix inequality(LMI). A numerical example is included to illustrate the applicability of the proposed design method.

关键词： State Estimation,Fuzzy Neural Networks,Observer,Delay

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Co-simulation Research of Autonomous Landing control System 33

Co-simulation Research of Autonomous Landing Control System

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第三十三届中国控制会议

作者： WANG Zhaoning WU Shengxi DUN Xiangming GU Xingsheng Key Laboratory of Advanced Control and Optimization for Chemical Processes Ministry of Education East China University of Science and Technology Research Institute of Robotics Shanghai Jiao Tong University

ISBN: (纸本)9781479947249

In this paper, a control simulation of the autonomous landing process of a Vertical Take-Off and Landing(VTVL) Reusable Launch Vehicle(RLV) is proposed and we consider the effects of the inner liquid propellant sloshing, elastic vibration, disturbance force, disturbance torque and other complex conditions in the virtual RLV model. On the basis of dynamics modeling of the RLV, we analyzed RLV's landing process. The landing control system was designed under certain conditions. Co-simulation Research was achieved by ADAMS and MATLAB/Simulink. The simulation results show that the control system performs well.

关键词： vertical take-off and landing autonomous landing reusable launch vehicle control system co-simulation research

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Active Disturbance Rejection Trajectory Tracking control for Two-Joint Driven by Pneumatic Artificial Muscles

Active Disturbance Rejection Trajectory Tracking Control for...

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2015 International Conference on Fluid Power and Mechatronics

作者： Ling Zhao Linlin Ge Yafei Yang Hebei Province Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Key Laboratory of Advanced Forging & Stamping Technology and Science(Yanshan University) Ministry of Education of China School of Electrical Engineering Yanshan University

Active disturbance rejection control is proposed to study the problems on trajectory tracking and decoupling for a two-joint system driven by pneumatic artificial muscles. Because of coupling and nonlinearity, it is very hard to obtain good performance in trajectory tracking for the two-joint system. The active disturbance rejection nonlinear controller includes a tracking differentiator, an extended state observer and a nonlinear error feedback controller. The tracking differentiator is introduced to arrange a transitional process to track input signal and get differential signal. The extended state observer is designed to estimate the non-linearity of system. The nonlinear error feedback controller is designed to improve the performance of system. Simulation results are given to show the effectiveness of proposed controller in this paper.

关键词： Active disturbance rejection control two-joint system decoupling control pneumatic artificial muscle

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Incentives of nonlinear dynamics behaviors in electro-hydraulic servo system

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ICIC Express Letters 2015年第1期9卷 231-236页

作者： Zhu, Yong Jiang, Wanlu Liu, Siyuan Liu, Zhiqiang Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University No. 438 Hebei Street Qinhuangdao China Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education of China Yanshan University No. 438 Hebei Street Qinhuangdao China

Based on the nonlinear dynamics principle, the nonlinear dynamic model of electro-hydraulic servo system (EHSS) was established. The influence laws of nonlinear spring force and friction on dynamic characteristics of EHSS were explored. Moreover, the bifurcation characteristics arising from primary excitations were investigated. The incentives of nonlinear dynamics behaviors (NDBs) in EHSS were revealed. Results show that the dynamic differential equations of EHSS can be described by Duffing-Van Der Pol equation. When EHSS is in working, excitation force, spring force nonlinear term and damping can result in complicated NDBs. The results can provide theoretical guidance for the parameter optimization during EHSS designing.

关键词： Dynamics

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Investigation of the trigger voltage walk-in effect in LDMOS for high-voltage ESD protection

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Journal of Semiconductors 2014年第9期35卷 56-59页

作者：梁海莲董树荣顾晓峰钟雷吴健于宗光 Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Department of Electronic Engineering Jiangnan University ESD Laboratory Department of Information Science and Electronic Engineering Zhejiang University China Electronic Technology Group Corporation No.58 Research Institute

The trigger voltage walkin effect has been investigated by designing two different laterally diffused metal-oxide-semiconductor （LDMOS） transistors with an embedded silicon controlled rectifier （SCR）. By inserting a P＋ implant region along the outer and the inner boundary of the N＋ region at the drain side of a conventional LDMOS transistor, we fabricate the LDMOS-SCR and the SCR-LDMOS devices with a different triggering order in a 0.5/zm bipolar-CMOS-DMOS process, respectively. First, we perform transmission line pulse （TLP） and DC-voltage degradation tests on the LDMOS-SCR. Results show that the trigger voltage walk-in effect can be attributed to the gate oxide trap generation and charge trapping. Then, we perform TLP tests on the SCR-LDMOS. Results indicate that the trigger voltage walk-in effect is remarkably reduced. In the SCR-LDMOS, the embedded SCR is triggered earlier than the LDMOS, and the ESD current is mainly discharged by the parasitic SCR structure. The electric potential between the drain and the gate decreases significantly after snapback, leading to decreased impact ionization rates and thus reduced trap generation and charge trapping. Finally, the above explanation of the different trigger voltage walk-in behavior in LDMOS-SCR and SCR-LDMOS devices is confirmed by TCAD simulation.

关键词： electrostatic discharge laterally diffused metal-oxide-semiconductor silicon control rectifier triggervoltage walk-in effect

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Adaptive Local Outlier Probability for Dynamic process Monitoring

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Chinese Journal of Chemical Engineering 2014年第7期22卷 820-827页

作者：马玉鑫侍洪波王梦灵 Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education East China University of Science and Technology

Complex industrial processes often have multiple operating modes and present time-varying behavior. The data in one mode may follow specific Gaussian or non-Gaussian distributions. In this paper, a numerically efficient movingwindow local outlier probability algorithm is proposed, lies key feature is the capability to handle complex data distributions and incursive operating condition changes including slow dynamic variations and instant mode shifts. First, a two-step adaption approach is introduced and some designed updating rules are applied to keep the monitoring model up-to-date. Then, a semi-supervised monitoring strategy is developed with an updating switch rule to deal with mode changes. Based on local probability models, the algorithm has a superior ability in detecting faulty conditions and fast adapting to slow variations and new operating modes. Finally, the utility of the proposed method is demonstrated with a numerical example and a non-isothermal continuous stirred tank reactor.

关键词： Time-varying Complex data distribution Local outlier probability Multi-mode Fault detection

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COS-training: A new semi-supervised learning method for keyphrase extraction based on co-training and SMOTE

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ICIC Express Letters, Part B: Applications 2015年第1期6卷 233-238页

作者： Wang, Gang Yang, Shanlin Ma, Jian School of Management Hefei University of Technology No. 193 Tunxi Road Hefei China Ministry of Education Key Laboratory of Process Optimization and Intelligent Decision-Making Hefei University of Technology No. 193 Tunxi Road Hefei China Department of Information Systems City University of Hong Kong Tat Chee Avenue Kowloon Hong Kong

As keyphrase is a small set of words that can best represent a document, they play significant roles in varieties of text-related tasks. In recent years, many unsupervised and supervised methods have been proposed for keyphrase extraction. However, keyphrase extraction is an imbalanced classification problem in nature and contains many unlabeled data, which have not been paid attention to in the previous studies. In this research, a new semi-supervised learning method, COS-training, is proposed for keyphrase extraction based on co-training and SMOTE. For the testing and illustration purpose, a keyphrase extraction dataset is selected to verify the effectiveness of the proposed method. Empirical results reveal that COS-training is a potential solution for keyphrase extraction. Among the compared methods, COS-training gets the best result. Al l these results illustrate that COS-training can be used as an alternative method for keyphrase extraction.

关键词： Extraction

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Improved Kernel PLS-based Fault Detection Approach for Nonlinear Chemical processes

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Chinese Journal of Chemical Engineering 2014年第6期22卷 657-663页

作者：王丽侍洪波 School of Electrical and Electronic Engineering Shanghai Institute of Technology Key Laboratory of Advanced Control and Optimization for Chemical Processes of Ministry of Education East China University of Science and Technology

In this paper, an improved nonlinear process fault detection method is proposed based on modified kernel partial least squares(KPLS). By integrating the statistical local approach(SLA) into the KPLS framework, two new statistics are established to monitor changes in the underlying model. The new modeling strategy can avoid the Gaussian distribution assumption of KPLS. Besides, advantage of the proposed method is that the kernel latent variables can be obtained directly through the eigen value decomposition instead of the iterative calculation, which can improve the computing speed. The new method is applied to fault detection in the simulation benchmark of the Tennessee Eastman process. The simulation results show superiority on detection sensitivity and accuracy in comparison to KPLS monitoring.

关键词： nonlinear process fault detection kernel partial least squares statistical local approach

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