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第35届中国控制会议

作者： HU Yuan JIA Tinggang NIU Yugang Key Laboratory of Advanced Control and Optimization for Chemical Process of Ministry of Education (East China University of Science and Technology) Automation Division of Shanghai Electric Group Co. Ltd.

ISBN: (纸本)9781509009107

Wireless sensor networks utilize large numbers of sensors to perform sensing and forwarding tasks in the monitoring *** to the resources constraints of sensors and the energy efficiency QoS requirement,prolonging the network lifetime is a major concern in *** is an efficient approach to reduce energy consumption since it can reduce data transmission of the *** most traditional clustering protocols,the cluster heads（CHs） aggregate the coming data from their cluster members（CMs） and send the aggregated data to the remote sink node directly or visa other ***,assigning a node to serve as CHs and relay nodes simultaneously may result in unbalanced energy *** energy efficient overlapping clustering and relay node selection algorithm is proposed,which selects different nodes as CHs and relay node to attain the balancing of energy consumption of the network.A direction fitness metric is designed to select the proper boundary nodes in the overlapping area to serve as relay *** results show that the proposed algorithm significantly prolongs the network lifetime.

关键词： Wireless sensor networks energy efficiency clustering relay nodes multi-hop

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Separable model predictive control via alternating direction method of multipliers for large-scale systems 19

Separable model predictive control via alternating direction...

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

作者： Lu, Liang Division of Automatic Control Department of Electrical Engineering Linköping University LinköpingSE-581 83 Sweden State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang China

ISBN: (纸本)9783902823625

In this paper, an alternating direction method of multipliers (ADMM) based realtime model predictive control (MPC) algorithm is presented. With the use of indicator function and by introducing extra consensus constraints, the constrained MPC problem can be formulated as a separable MPC problem, which can be computed very efficiently by projected gradient descent ADMM update steps and Riccati recursions. The sequence of the objective value of this constrained real-time ADMM-type MPC algorithm satisfies a linear convergence rate. The procedure is also extended to distributed systems with constraints, in which the variables of each subsystems communicate with their neighbors and update in the Gauss-Seidel way. An illustrative example shows the effectiveness of this approach. © IFAC.

关键词： Model predictive control

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Cooperative and Hierarchical Fuzzy MPC for Building Heating control

Cooperative and Hierarchical Fuzzy MPC for Building Heating ...

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IEEE International Conference on Fuzzy Systems

作者： B. Mayer M. Killian M. Kozek FH JOANNEUM Institute of Mechanics and Mechatronics Division of Control and Process-Automation Vienna University of Technology

ISBN: (纸本)9781479920747

A combined cooperative and hierarchical control structure utilizing Fuzzy Model Predictive control (FMPC) for building heating is introduced. The structure comprises three types of Model Predictive controllers (MPC): For different independent zones of the building FMPCs optimize the fast acting input variable fan coils (FC) while a global linear MPC optimizes the slowly acting thermally activated building systems (TABS). Cooperation between these two groups of controllers is guaranteed by an inter-sample iteration. This cooperative structure acts as master in a hierarchical structure, where the slave is a mixed-inter MPC (MI-MPC) in the supply level. While the cooperative structure ensures user comfort in the building, the MI-MPC optimizes monetary costs of heat supply. This structure allows for decoupled and independent modeling of FMPCs, simple incorporation of the coupling input TABS, and decoupled design of the supply level control. A discussion on stability and sub-optimality of the control structure is given. A simulation of a large office building incorporating disturbances of ambient temperature, radiance, and occupancy demonstrates the performance of the proposed concept.

关键词： Fuzzy MPC TS-fuzzy system modelling Building climate control Cooperative MPC Hierachical MPC

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Online Design of Experiments in the Relevant Output Range

Online Design of Experiments in the Relevant Output Range

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Optimization and Optimal control in Automotive Systems: workshop organized by the Austrian Center of Competence in Mechatronics, ACCM 2013

作者： Didcock, Nico Rainer, Andreas Jakubek, Stefan Christian Doppler Laboratory for Model Based Calibration Methodologies Institute of Mechanics and Mechatronics Division of Control and Process Automation Vienna University of Technology Wiedner Hauptstrasse 8-10/325/A5 1040 Vienna Austria AVL List GmbH Hans-List-Platz 1 8020 Graz Austria

ISBN: (纸本)9783319053707

Nonlinear system identification requires informative data obtained from experiments in order to parameterise a model of the underlying process. As an example for the automotive industry, good models for NOx and smoke emissions are required to effectively calibrate modern combustion engines. With continuously increasing complexity in terms of the number of variation channels available in the engines the experimental effort provides a growing challenge for efficient calibration. Design of Experiments (DoE) refers to optimal excitation of the system in order to maximise the knowledge gained for a process under investigation from a limited amount of measurements. We introduce a methodology that omits measurements unrelevant for calibration via pre-specification of restrictions on the inputs as well as the outputs. Output restriction to a certain target region is obtained via a supervising online model that is trained during the workflow. The distribution of input samples obtained via this method is non-uniform over the pre-image of the target region. The effectiveness of this concept is demonstrated for the modeling of NOx and smoke emissions of a diesel engine. © Springer International Publishing Switzerland 2014.

关键词： Calibration

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Separable Model Predictive control via Alternating Direction Method of Multipliers for Large-scale Systems

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IFAC Proceedings Volumes 2014年第3期47卷 10499-10504页

作者： Liang Lu Division of Automatic Control Department of Electrical Engineering Linköping University SE-581 83 Linköping Sweden State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang China

In this paper, an alternating direction method of multipliers (ADMM) based real-time model predictive control (MPC) algorithm is presented. With the use of indicator function and by introducing extra consensus constraints, the constrained MPC problem can be formulated as a separable MPC problem, which can be computed very efficiently by projected gradient descent ADMM update steps and Riccati recursions. The sequence of the objective value of this constrained real-time ADMM-type MPC algorithm satisfies a linear convergence rate. The procedure is also extended to distributed systems with constraints, in which the variables of each subsystems communicate with their neighbors and update in the Gauss-Seidel way. An illustrative example shows the effectiveness of this approach.

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Measurement of Material Properties of Steel Sheets Using Laser Ultrasonic Technology

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Procedia Engineering 2014年 81卷 1414-1419页

作者： Mitsuhiko Sano Kazuhiro Ohara Naoki Shimoda Masashi Tsugeno Research and Development Center of Process Control Industrial Automation & Drive Systems Division Toshiba Mitsubishi-electric Industrial Systems Corporation (TMEIC) 3-1-1 Kyobashi Chuo-ku Tokyo 104-0031 Japan Industrial Automation & Drive Systems Division Toshiba Mitsubishi-electric Industrial Systems Corporation (TMEIC) 3-1-1 Kyobashi Chuo-ku Tokyo 104-0031 Japan

A non-contact laser ultrasound measuring system for material properties of high-strength steels was developed. This system can measure material properties such as crystal grain size by analyzing high-frequency ultrasound waveforms generated by a pulsed laser. For this purpose, a light equalizing device is applied to the pulsed laser path so that the excited ultrasound can propagate a long distance without being weakened by diffusion. Therefore, the characteristics of the waveform can be captured clearly and analyzed correctly by this system. The advantages of this device were confirmed by numerical simulation of the ultrasonic propagation. The capability of this measuring system was shown by experimental measurement of various high-strength steel specimens. The measured crystal grain sizes showed good agreement with the results of SEM-EBSD observations. The measured crystal grain size also showed good correlation with the tensile test results.

关键词： Laser-ultrasound Non-contact measurement Material property Grain size Hot strip mill Rolling

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Sliding mode control for T-S fuzzy stochastic systems with Markovian switching

Sliding mode control for T-S fuzzy stochastic systems with M...

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第三十三届中国控制会议

作者： Bei Chen Yugang Niu Tinggang Jia Central Academe Shanghai Electric Group Co.Ltd. Key Laboratory of Advanced Control and Optimization for Chemical Process(East China University of Science and Technology) Ministry of Education Automation Division Shanghai Electric Group Co.Ltd.

This paper is concerned with the sliding mode control(SMC)problem for a class of T-S fuzzy stochastic systems with Markovian *** purpose of the problem addressed is to integrate the SMC method such that,for all admissible parameter uncertainty,external disturbance and state-dependent noise,the closed-loop system is globally asymptotically ***,it is not required that each nominal local system model shares the same input channel,which is usually assumed in some existing *** is shown that both the reachability of sliding surfaces and the stability of sliding mode dynamics can be ensured.

关键词： Markovian jumping systems,State-dependent noise,T-S fuzzy model,Sliding mode control

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Sliding mode control for Markovian jumping systems subject to partially known transition rate

Sliding mode control for Markovian jumping systems subject t...

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第三十二届中国控制会议

作者： Bei Chen Tinggang Jia Yugang Niu Key Laboratory of Advanced Control and Optimization for Chemical Process(East China University of Science and Technology) Ministry of Education Automation Division Shanghai Electric Group Co.Ltd.

ISBN: (纸本)9781479900305

This paper investigates the problem of sliding mode control for a class of stochastic Markovian jumping systems with partially known transition rate.A key feature in this work is to relax the requirement that all the elements in transition rate matrix are known,which is usually encountered in some existing *** is shown that the reachability of the specified sliding surface can be ensured by the designed sliding mode ***,the suffcient conditions for the stability of the sliding motion on the sliding surface are also derived.

关键词： Markovian jumping systems incomplete transition rate state-dependent noise sliding mode control

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Comparison of LQ-optimal actuator / sensor selection approaches for flexible structure systems

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AIP Conference Proceedings 2012年第1期1493卷 459-466页

作者： Mark Hemedi Alexander Schirrer Martin Kozek Vienna University of Technology Institute of Mechanics and Mechatronics Division of Control and Process Automation Austria

In active control of flexible structures, the optimal selection of actuating andmeasurement positions on the structure is a prerequisite to enable effective control design. This paper compares two selection onsets based on the LQG control problem formulation. Although the two selection onsets differ considerably in their idea, it is shown at a classical bending beam example that they produce consistent results. The methods’ characteristics are discussed and outlined, providing a guideline for their applicability in practice. The first onset, published in [11], utilizes the LQG formalism and efficient tuning parameter search to design tuned LQG controllers for each candidate actuator / sensor. Thereby, a normalized performance index can be formulated which reflects the efficiency of actuation / measurement. This very general onset has been shown to produce reliable results in numerically challenging industrial problems and is easily extended to sets of linearized systems of nonlinear plants. The strategy presented in [3] reformulates the LQG design problem into a sensor (actuator) cost minimization problem subject to LMI constraints which implement the corresponding Riccati equations and coupling conditions. A numeric example for this method is given in the present paper for the first time which shows strong discrimination of non-optimal actuator / sensor positions. Both methods are compared at a bending beam input selection task, highlighting each method’s major advantages and limitations.

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Battery impedance emulation for hybrid and electric powertrain testing

Battery impedance emulation for hybrid and electric powertra...

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IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Oliver König Stefan Jakubek Günter Prochart Institute of Mechanics and Mechatronics Division of Control and Process Automation Vienna University of Technology Austria AVL List GmbH Graz Austria

With battery emulators, development engineers can test electrical drives on testbeds without the need for costly battery prototypes. Furthermore, valuable time for battery pre-conditioning can be saved. However, high quality battery emulation is a challenge that requires a good battery model and accurate emulation of the model with a controllable power supply. A high-fidelity nonlinear battery model based on local model networks is used. This allows the extraction of local linear models for impedance emulation with a switch model DC-DC converter. Local linear battery models and a model of the converter are combined to a prediction model which is used for designing a model predictive controller. In contrast to existing impedance emulation schemes with cascaded feedback loops, the virtual impedance is included in the inner voltage control loop in order to achieve the highest possible bandwidth. Owing to constrained optimal control, this is achieved while respecting control variable constraints and inductor current safety limits. Experimental results show the effectiveness of the proposed battery impedance emulation scheme.

关键词： Load modeling Inverters Variable speed drives Switches Time measurement

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