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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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Triangular Fuzzy Number Representation of Relations in Fuzzy Cognitive Maps

Triangular Fuzzy Number Representation of Relations in Fuzzy...

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IEEE International Conference on Fuzzy Systems

作者： Engin Yesil M. Furkan Dodurka Leon Urbas Control and Automation Engineering Department Istanbul Technical University Istanbul Turkey Chair of Process Control Systems Engineering Technology University of Dresden Germany

In this paper, the conventional Fuzzy Cognitive Maps (FCMs), which has already achieved success in many fields, are extended by using triangular fuzzy numbers (TFNs). The advantage of FCMs is that they are relatively easy to construct and parameterize and are capable of handling the full range of system feedback structure, including density-dependent effects. However, it is a well-known fact that there are some limitations inherent in FCM, such as lack of adequate capability to handle uncertain information and lack of enough ability to aggregate the information from different sources. Triangular fuzzy numbers which are represented by a triplet has the capacity to represent the uncertain relations between the concepts. In this context, the weight matrix representing the causal relations are enhanced to a fuzzy weight matrix that has TFNs as element. As a result of this improvement, the dynamic reasoning algorithm of the conventional FCM is improved for the use of the proposed novel FCM. The proposed FCM is presented via four simulations and the results are discussed. The results of the simulation study shows how easily the uncertain information can be represented and interpreted by the proposed FCM design methodology.

关键词： Uncertainty Vectors Cognition Fuzzy sets Pragmatics Fuzzy cognitive maps Modeling

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Application of Continous Casting Simulation at Štore Steel—II

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BHM Berg- und Huttenmannische Monatshefte 2014年第3期159卷 99-107页

作者： Šarler, Božidar Vertnik, Robert Lorbiecka, Agnieszka Zuzanna Vušanović, Igor Senčič, Bojan Laboratory for Multiphase Processes University of Nova Gorica Vipavska 13 Nova Gorica5000 Slovenia Laboratory for Simulation of Materials and Processes Institute of Metals and Technology Lepi pot 11 Ljubljana Slovenia Laboratory for Advanced Materials Systems Center of Excellence for Biosensors Automation and Process Control Velika pot 22 Solkan5250 Slovenia Štore Steel d.o.o. Železarska cesta 3 Štore3220 Slovenia Faculty of Mechanical Engineering University of Montenegro George Washington street Podgorica81000 Montenegro Centre of Excellence for Biosensors Automation and Process Control Velika pot 22 Solkan5250 Slovenia

This paper represents the elements and the use of the upgraded simulation system, developed in the last half decade for Štore Steel billet caster. The simulation system is used in the context of the state-of-the-art automation and information of the twenty-five year-old three-strand Concast billet continuous caster for dimensions square 140 and 180 mm with the capacity of 160,000 tons/year. The simulation system is used in the off-line and on-line modes. The off-line mode is used in order to set the proper process parameters and to calculate the temperature field, macrosegregation, and grain structure of the strand. It is also used to calculate the changes in the caster design such as the secondary cooling and the position of the SEN. The on-line model is used in automatic casting control system. The paper represents an update of our BHM publication of 2005 (Application of Continous Casting Simulation at Štore Steel, BHM, Vol. 150, No. 9, 300–306). © 2013, Springer-Verlag Wien.

关键词： Continuous casting

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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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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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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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Time Delay Prediction Method Based on EMD and Elman Neural Network

Time Delay Prediction Method Based on EMD and Elman Neural N...

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International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC

作者： Fan Yu Dan Chen Xusheng Tang Research Center for Advanced Process Control Fuzhou University Fuzhou China College of Mechanical Engineering and Automation Fuzhou University Fuzhou China

ISBN: (纸本)9781479949540

The time-delay in the teleoperation system is an important parameter affecting the stability and performance. A time delay prediction method based on EMD(Empirical Mode Decomposition) and Elman neural network is proposed in this paper. Firstly, time delay sequence is separated into IMFs by EMD, then the first several IMFs are subtracted from time delay signals as noise. The sum of rest IMFs are taken as the input of Elman neural network to predict. Finally, computer simulation of teleoperation is built. The results of experiments indicate that the proposed method based on EMD and Elman neural network is more accurate and has better prediction ability than which is predicted by Elman neural network directly.

关键词： Delay effects Neural networks Noise Educational institutions Internet Prediction algorithms Hidden Markov models

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