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19th IFAC World Congress on International Federation of Automatic control, IFAC 2014

作者： Haber, R. Schmitz, U. Zabet, K. Institute of Process Engineering and Plant Design Laboratory of Process Automation Cologne University of Applied Science Betzdorfer Str. 2 KölnD-50679 Germany Department for APC and Process Control Technology Rheinland Refinery Shell Deutschland Oil GmbH Ludwigshafener Strasse 1 WesselingD-50389 Germany

ISBN: (纸本)9783902823625

PFC (Predictive Functional control) is a simple but very effective SISO (Single-Input SingleOutput) predictive controller which does not require any matrix inversion or numerical minimization of a cost function, therefore it is easy to realize in a PLCs (Programmable Logical controllers) or a DCS (Decentralized control Systems). The manipulated variable and/or its increment, as well other variables can be constrained easier than when using PI(D) (Proportional, Integrating, and Derivating) controller. Furthermore PFC handles the dead time process better than with PI(D) controller. Three industrial applications of PFC for two distillation columns and a reactor in a petro-chemical plant were implemented and the experiences are presented here. © IFAC.

关键词： controllers

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Analysis of the impact of translating cowl on hypersonic vehicle performance

Analysis of the impact of translating cowl on hypersonic veh...

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第26届中国控制与决策会议

作者： Liqian Dou Yuye Shen Ran Ji School of Electrical Engineering & Automation the Tianjin Key Laboratory of Process Measurement and ControlTianjin University

For the power plant of hypersonic vehicle – scramjet, this work mainly studies the effects of the translating cowl of inlet on the static and dynamic performance of the hypersonic vehicle. The results indicate that the effects of the cowl on lift and drag can be negligible, while the effects of the cowl on thrust and pitching moment are significant. The cowl makes thrust-drag ratio bigger and the accelerated conditions corresponding angle of attack range larger. The cowl increases the degree of flexible deformation, but in total this effects can be negligible. For the balance states, the elevator deflection angle needed becomes bigger to offset the additional pitching moment;a smaller angle of attack and stoichiometrically normalized fuel equivalence ratio(FER) needed generate enough thrust to reach a certain speed and height, thereby the flight left margin considering viscous is expanded. The article also analyzes the effects of a translating cowl on open-loop poles and zeros of the typical transfer function of the linear model, and found the RHP unstable zeros was away from the imaginary axis, the flight control system bandwidth limit can be slightly widened. This article provides the basis theoretical study for further controller design of the hypersonic vehicle.

关键词： translating cowl of inlet thrust-drag ratio structure flexible zero-pole point flying boundary

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Regional Stabilization of Continuous-Time Systems with Saturated Quantizer and Packet Dropouts

Regional Stabilization of Continuous-Time Systems with Satur...

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第三十三届中国控制会议

作者： Zhiqiang Zuo Dianjie Ma Yijing Wang Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and AutomationTianjin University

ISBN: (纸本)9781479947249

This paper addresses the problem of regional stabilization of NCSs in continuous-time form subject to state constraints,saturated quantizer and packet dropouts. Different from the previous results based on quadratic stability, a state feedback uniform quantizer is designed via the non-quadratic Lyapunov functional approach. To achieve such an objective, the saturated quantizer is decomposed into two parts, a saturation function and a uniformly bounded disturbance. A polytopic representation of the saturation function is utilized, which builds the foundation on the construction of the non-quadratic Lyapunov functional. The designed controller is obtained through the solutions of some matrix inequalities. A numerical example is given to demonstrate the effectiveness of our results.

关键词： Regional stabilization,Saturated quantizer,Packet dropouts,Non-quadratic Lyapunov functional

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Transmission-mode ultrasonic measurement for gas bubble detection

Transmission-mode ultrasonic measurement for gas bubble dete...

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International Conference on Mechatronics and control (ICMC)

作者： Cong Xu Chao Tan Feng Dong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin Tianjin CN Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin P.R. China

ISBN: (纸本)9781479925391

Non-invasive ultrasonic tomography is a practical solution of extracting cross-section information regarding the process of two-phase flow. For gas/water two-phase flow, the ultrasonic energy would be reflected about 99.94% at the gas/water interface due to the great differences between the acoustic impedance of water and gas. In this paper, the relations between pressure or voltage loss and bubble diameter has been studied by simulation results and experimental results, respectively by the ultrasonic transmission method. Both results showed that the transmission-mode measurement method has good resolution on the bubble diameter.

关键词： Acoustics Ultrasonic variables measurement Tomography Attenuation Impedance Real-time systems Acoustic measurements

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Immersion and Invariance based Adaptive Attitude Tracking control of a Quadrotor UAV in the Presence of Parametric Uncertainty

Immersion and Invariance based Adaptive Attitude Tracking Co...

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第三十三届中国控制会议

作者： Bo Zhao Bin Xian Yao Zhang Xu Zhang The Institute of Robotics and Autonomous System the Tianjin Key Laboratory of Process Measurement and ControlSchool of Electrical Engineering and Automation Tianjin University

ISBN: (纸本)9781479947249

In this paper, a new adaptive controller for a quadrotor unmanned aerial vehicle(UAV) is presented via Immersion and Invariance(I&I) approach. The quadrotor's dynamic model is subjected to some uncertain parameters such as the inertial moments, aerodynamic damping coefficients and so on. In particular, the mass-eccentric effects by the payloads are also *** all these uncertainties above, the proposed adaptive controller is still capable of driving the quadrotor UAV's attitude asymptotically to a desired trajectory. The stability analysis is performed by Lyapunov techniques and LaSalle's invariance theorem. Numerical simulation results illustrate the good tracking performance of the proposed scheme.

关键词： quadrotor,UAV,adaptive control,immersion and invariance,I&I

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Corrigendum to “Limit load solutions of thick-walled cylinders with fully circumferential cracks under combined internal pressure and axial tension” [Nucl. Eng. Des. 238 (2008) 2155–2164]

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Nuclear engineering and Design 2015年 284卷 309-309页

作者： Zengliang Gao Gangsi Cai Lihua Liang Yuebao Lei Institute of Process Equipment and Control Engineering Zhejiang University of Technology The MOE Key Laboratory of Mechanical Manufacture and Automation Hangzhou 310032 China Wenzhou Industry Design Institute Wenzhou 325000 China

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A synthesis approach to predictive control for networked control systems 33

A synthesis approach to predictive control for networked con...

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Proceedings of the 33rd Chinese control Conference, CCC 2014

作者： Zou, Yuanyuan James, Lam Niu, Yugang Li, Dewei Key Laboratory of Advanced Control and Optimization for Chemical Process Ministry of Education East China University of Science and Technology Shanghai200237 China Department of Mechanical Engineering University of Hong Kong Hong Kong Department of Automation Shanghai Jiao Tong University Shanghai200240 China

ISBN: (纸本)9789881563842

This paper studies a synthesis approach to predictive control for networked control systems with data loss and quantization. An augmented Markov jump linear model with polytopic uncertainties is modeled to describe the quantization errors and possible data loss. Based on this model, a predictive control synthesis approach is developed, which involves online optimization of a infinite horizon objective and conditions to deal with system constraints. The proposed MPC algorithm guarantees closed-loop mean-square stability and constraints satisfaction. © 2014 TCCT, CAA.

关键词： Networked control systems

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Online Contribution Rate Based Fault Diagnosis for Nonlinear Industrial processes

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Acta Automatica Sinica 2014年第3期40卷 423-430页

作者： Kai-Xiang PENG Kai ZHANG Gang LI Key Laboratory for Advanced Control of Iron and Steel Process School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing 100083 China Department of Automation Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing 100084 China

Over past decades, kernel principal component analysis (KPCA) appeared quite popularly in data-driven process monitoring area. Enormous work has been done to show its simplicity, feasibility, and effectiveness. However, the introduction of kernel trick makes it impossible to directly employ traditional contribution plots for fault diagnosis. In this paper, on the basis of revisiting and analyzing the existing KPCA-relevant diagnosis approaches, a new contribution rate based method is proposed which can explain the faulty variables clearly. Furthermore, a scheme for online nonlinear diagnosis is established. In the end, a case study on continuous stirred tank reactor (CSTR) benchmark is applied to access the effectiveness of the new methodology, where the comparisons with the traditional linear method are involved as well.

关键词： Kernel principal component analysis (KPCA) nonlinear fault detection contribution rate fault diagnosis

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Temperature Modeling of PEM Fuel Cell Based on Fuzzy Strategy

Temperature Modeling of PEM Fuel Cell Based on Fuzzy Strateg...

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第26届中国控制与决策会议

作者： Yan Qun Li Qing Zhang Peichang Yu Datai School of Automation & Electrical Engineering University of Science and Technology Beijing Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education)

Proton Exchange Membrane Fuel cell has many perfect characters and becomes one of the most important research subjects among domestic and international fuel cell fields. Heat transfer management is one of the key technologies for PEM fuel cell. This paper built a temperature model of PEM fuel cell based on fuzzy technology, which divided the fuzzy space evenly by established rules, got the number of fuzzy rules and rules application degree, identified the consequent parameters by least square method. This model is fit for multi-variables and has simple construction and high accuracy. Finally, simulation examples show the effectiveness of the modeling.

关键词： fuzzy identification,PEM fuel cell,temperature system,T-S model

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A new pricing scheme for controlling energy storage devices in smart grid

A new pricing scheme for controlling energy storage devices ...

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2014 American control Conference, ACC 2014

作者： Zhu, Jingwei Chen, Michael Z. Q. Zuo, Zhiqiang Du, Baozhu Department of Mechanical Science and Engineering University of Illinois at Urbana-Champaign Champaign IL 61820 United States Department of Mechanical Engineering University of Hong Kong Hong Kong Hong Kong Tianjin Key Laboratory of Process Measurement and Control School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China School of Automation Nanjing University of Science and Technology Nanjing China HKU Shenzhen Institute of Research and Innovation China

ISBN: (纸本)9781479932726

Improvement of the overall efficiency of energy infrastructure is one of the main anticipated benefits of the deployment of smart grid technology. Advancement in energy storage technology and two-way communication in the electric network are indispensable components to achieve such a vision, while efficient pricing schemes and appropriate storage management are also essential. In this paper, we propose a novel pricing scheme which permits one to indirectly control the energy storage devices in the grid to achieve a more desirable aggregate demand profile that meets a particular target of the grid operator such as energy generation cost minimization and carbon emission reduction. Such a pricing scheme can potentially be applied to control the behavior of energy storage devices installed for integration of intermittent renewable energy sources that have permission to grid connection and will have broader applications as an increasing number of novel and low-cost energy storage technologies emerge. © 2014 American Automatic control Council.

关键词： Smart power grids

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