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作者： Zhao, Yu Huang, Biao Su, Hongye Chu, Jian State Key Lab. of Industrial Control Technology Institute of Cyber Systems and Control Zhejiang University Hangzhou 310027 China University of Alberta Canada Department of Chemical and Materials Engineering University of Alberta Edmonton AB T6G 2G6 Canada

This paper is concerned with the identification of multiple model process with transition using the output error (OE) method. Local multiple linear models with output error model structure are identified at fixed operating points first and then a global nonlinear model is approximated by interpolating the multiple linear models with exponential weighting functions. With all the obtained initial values of the system's parameters, nonlinear optimization strategy is implemented to find the optimal values of the parameters for both the local multiple models and their corresponding weighting functions. Finally a more accurate global model can be obtained. The effectiveness of the proposed approach is demonstrated through simulation examples. © 2011 Zhejiang University.

关键词： Errors

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Performance assessment of PID controller with time-variant disturbance dynamics

Performance assessment of PID controller with time-variant d...

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International Symposium on Advanced control of industrial Processes (ADCONIP)

作者： Mengfei Zhou Lei Xie Haitian Pan Shuqing Wang College of Chemical Engineering and Materials Science Zhejiang University of Technology Hangzhou China National Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control University of Zhejiang Hangzhou China

A method is proposed for performance assessment of PID control loops subject to time-varying disturbance dynamics, which is often observed in industrial processes. The proposed method optimizes overall performance of the processes and presents a PID tradeoff curve which provides a useful lower bound on the achievable performance of the PID controller in terms of both the most significant disturbance rejection and the representative disturbance rejection. One can choose an optional benchmark to assess the PID control performance according to the tradeoff curve. The developed performance assessment technique is illustrated by simulation and industrial examples.

关键词： Benchmark testing Process control Transfer functions Materials Petroleum Furnaces Transient analysis

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Output error method for identification of multiple-model process with transition

Output error method for identification of multiple-model pro...

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International Symposium on Advanced control of industrial Processes (ADCONIP)

作者： Yu Zhao Biao Huang Hongye Su Jian Chu University of Alberta Canada State Key Laboratory of Industrial Control Technology Institute of Cyber Systems and Control University of Zhejiang Hangzhou China Department of Chemical and Materials Engineering University of Alberta Edmonton AB Canada

关键词： Interpolation Spline Optimization Data models Coolants Numerical models Zinc

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Adaptive failure compensation of hysteric actuators in controlling uncertain nonlinear systems

Adaptive failure compensation of hysteric actuators in contr...

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作者： Cai, Jianping Wen, Changyun Su, Hongye Li, Xiaodong Liu, Zhitao State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 China Zhejiang Water Conservancy and Hydropower College Hangzhou 310018 China School of Electrical and Electronic Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Singapore Beijing Research Institute of Automation for Machinery Industry No.1 Jiao Chang Kou De Sheng Men Wai Beijing 100120 China

ISBN: (纸本)9781457700804

Hysteresis nonlinearity exists in many physical actuators and actuator failures seem inevitable in practice. However, there is still no result available to compensate for failures of hysteric actuators in the design of controllers based on adaptive approaches. In this paper, we address such a problem by considering controlling a class of unknown nonlinear systems with multiple hysteric actuators. Two schemes are presented to design control signals for these actuators. Both schemes can accommodate uncertain patterns, values and time of actuator failures, in addition to system parametric uncertainties. It is shown that the designed controllers can compensate for failure and hysteresis effects of the actuators in the sense that system stability and tracking performance are maintained no matter whether this is any actuator failure or not. © 2011 AACC American Automatic control Council.

关键词： Actuators

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A Constructive Procedure based on Dynamic Scaling for Adaptive control of Nonlinearly Parameterized Nonlinear systems

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IFAC Proceedings Volumes 2011年第1期44卷 120-125页

作者： Xiangbin Liu Romeo Ortega Hongye Su Jian Chu Advanced Control Systems Laboratory of School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 P. R. China. (Tel: 86-10-5168-4105) Laboratoire des Signaux et Systèmes CNRS–SUPELEC 91192 Gif–sur–Yvette France State Key Lab. of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 P. R. China

Abstract A new framework to design immersion and invariance adaptive controllers for nonlinearly parameterized, nonlinear systems was recently proposed by the authors. The key step is the construction of a monotone mapping, via a suitable selection of a controller tuning function, which has to satisfy some integrability conditions—this translates into the need to solve a partial differential equation (PDE). In this paper this result is extended providing some answers to the questions of characterization of “monotonizable” systems and solvability of the PDE. First, adding to the design a nonlinear dynamic scaling, we obviate the need to solve the PDE. Second, for the case of factorizable nonlinearities , the following results are established. (i) It is shown that the monotonicity condition is satisfied if a linear matrix inequality is feasible. (ii) Directly verifiable involutivity conditions that ensure the solution of the PDE are presented. (iii) An explicit formula for the required tuning function is given, provided the regressor matrix satisfies some rank conditions. Hence, adding a dynamic scaling, this yields a constructive solution to the problem.

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Output Feedback Adaptive Robust Learning control of a Class of Nonlinear systems with Periodic Disturbances

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IFAC Proceedings Volumes 2011年第1期44卷 4874-4879页

作者： Xiangbin Liu Zhongsheng Hou Bin Yao Hongye Su Mingxuan Sun Advanced Control Systems Laboratory School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 P. R. China. (Tel: 86-10-5168-4105) School of Mechanical Engineering Purdue University West Lafayette IN 47907 U.S.A. State Key Lab. of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 P. R. China College of Information Engineering Zhejiang University of Technology Hangzhou 310032 China

Abstract In this paper, a discontinuous projection-based output feedback adaptive robust learning control (OARLC) scheme is constructed for a class of nonlinear systems in a semi-strict feedback form by incorporating an observer and a dynamic normalization signal. Since only output signal is available for measurement, an observer is firstly designed to provide exponentially convergent estimates of the unmeasurable states. Using certain known basis functions to capture the characteristics of unknown general periodic disturbances, the discontinuous projection type adaptation law can then be used to tune the amplitudes of those basis functions on-line to recover the unknown general periodic disturbances asymptotically. The estimation errors due to the unknown initial states, uncompensated disturbances, and the uncertain nonlinearities are also effectively dealt with via certain robust feedback at each step of the proposed OARLC backstepping design. The resulting controller achieves a guaranteed transient and a prescribed final tracking accuracy for output tracking performance. In addition, when the general periodic disturbances fall within the approximation ranges of the periodic basis functions, asymptotic output tracking performance is achieved as well.

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Adaptive Failure Compensation of Hysteric Actuators in controlling Uncertain Nonlinear systems

Adaptive Failure Compensation of Hysteric Actuators in Contr...

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2011 American control Conference (ACC)

作者： Jianping Cai Changyun Wen Hongye Su Xiaodong Li Zhitao Liu Jianping Cai Hongye Su and Zhitao Liu are State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems University of Zhejiang Hangzhou China School of Electrical and Electronic Engineering Nanyang Technological University Singapore Singapore Beijing Research Institute of Automation For Machinery Industry Beijing China

关键词： Actuators Stability analysis Adaptive control Nonlinear systems Lyapunov methods Hysteresis Backstepping

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Robust Adaptive Failure Compensation of Hysteretic Actuators for Parametric Strict Feedback systems

Robust Adaptive Failure Compensation of Hysteretic Actuators...

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IEEE Conference on Decision and control

作者： Jianping Cai Changyun Wen Hongye Su Zhitao Liu Xiangbin Liu State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou 310027 P.R.China School of Electrical and Electronic Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Singapore School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 P.R.China

ISBN: (纸本)9781612848006

It is well known that hysteresis often exists and failures may occur in practical actuators during system operation. The compensation for uncertainties caused by unknown hysteresis and unknown failures is an important problem in ensuring system stability and performances. However, available results based on adaptive approaches to address such a problem are still very limited. In this paper, an adaptive tracking control scheme is proposed to solve such a problem. Simulation results also illustrate the effectiveness of the control scheme.

关键词： Feedback Hysteresis actuators Operating systems compensated System stability autocovariance air adjustment scheme Self tuning Parametric

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A new heuristic method combined with Lagrangian relaxation algorithm for Hybrid flow shop problem

A new heuristic method combined with Lagrangian relaxation a...

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IEEE International Conference on industrial Engineering and Engineering Management, IEEM2010

作者： Zhou, Xuanhao Lu, Yong-Zai State Key Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China

ISBN: (纸本)9781424485031

In this paper, a heuristic algorithm which embedded in the Lagrangian relaxation algorithm is proposed to obtain the near optimal solution to minimize the total weighted complete time in the Hybrid flow shop problem (HFS). Compared with the original precedence capacity relaxation algorithm proposed by Tang et al. in [6], our algorithm can produce a better solution in most cases. ©2010 IEEE.

关键词： Heuristic methods

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Plasma Kinetics and Biodistribution of Water-soluble CdTe Quantum Dots in mice:A Comparison Between Cd and Te

Plasma Kinetics and Biodistribution of Water-soluble CdTe Qu...

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第十一届全国生物无机化学学术会议

作者： Ying Han Guangyun Xie Ying Mu Sihai Han Na Liu Hui Wang Peili Huang Zhiwei Sun Department of Toxicology and Sanitary Chemistry School of Public Health and Family Medicine CapitalMedical University Beijing 100069 China Institute for Occupational Health and Poisoning Control Chinese Center for Disease Control and Prevention Beijing 100013 China Research Center for AnalyticalInstrumentation State Key Lab. Of Industrial Control Technology Institute of Cyber-Systems and ControlZhejiang University Hangzhou 310058 China. Department of Toxicology and Sanitary Chemistry School of Public Health and Family Medicine CapitalMedical University Beijing 100069 China

Water-soluble quantum dots (QDs) are effective reagents,have minimal toxicity,are compatible with biological system,and have shown potential as tumor diagnostic ***,little is known about their biological behaviors in *** recent in vivo studies concentrated on the biokinetics of cadmium telluride (CdTe) *** ICR mice were intravenously given a single dose (2.5 μmol/kg body weight) of water-soluble cadmium-telluride (CdTe) QDs (the QDs are approximately 4 nm in diameter and have maximal emission at 630 nm).Inductively coupled plasma mass spectrometry (ICP-MS) was used to measure the kinetic action of 111Cd and 125Te for 7 *** plasma kinetics of cadmium (Cd) and tellurium (Te) followed a two-compartment model,in which Te exhibited lower volume of distribution (107.41 ± 9.75 ml/kg vs.127.25 ± 5.65 ml/kg),AUC (15.28 ± 0.89 μg/ml?h vs.18.73 ± 2.29μg/ml?h),rapid elimination half-life (21.55 ± 0.24 h vs.49.28 ± 2.79 h),and clearance (10.38 ± 0.80 ml?kg-1?h-1 vs.14.81 ± 1.90 ml/kg?h),and a slower distribution half-life (7.17 ± 0.06 h vs.6.01 ± 0.58 h) compared to the *** to its relatively transient fate in the plasma,high levels of Cd persisted in the liver and kidneys throughout the experimental *** the kidneys,the tissue concentration showed an increase after *** with Cd,the overall half-life of Te in the body was very ***,Te accumulated primarily in the spleen,followed by liver and *** different plasma kinetics and distribution patterns of Cd and Te imply that CdTe QDs have been part of the degradation or aggregation in vivo.

关键词： Quantumdot Kinetics Biodistribution ICP-MS Mice

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