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Process synthesis and design problems based on a global particle swarm optimization algorithm

Journal of Computational Information Systems 2014年第13期10卷 5739-5746页

作者： Chen, Chuanhu Wang, Xin Zou, Dexuan School of Electrical Engineering and Automation Jiangsu Normal University Xuzhou China Information and Control Engineering Faculty Shenyang Jianzhu University Shenyang China

Many process synthesis and design problems in engineering are actually mixed integer nonlinear programming problems (MINLP), because they contain both continuous and integer variables. These problems are generally recognized to be complex and intractable by virtue of the combinatorial characteristic. In order to effectively solve process synthesis and design problems, a global particle swarm optimization (GPSO) algorithm is proposed in this paper. GPSO algorithm makes two improvements on original particle swarm optimization (PSO) algorithm: first, it introduces a global inertia weight, which is beneficial to improving its global searching capacity during the whole optimization process;second, it adopts a mutation operation with a small probability, which enables the GPSO algorithm to get rid of the local optimum easily. Simulation results show that the GPSO algorithm has high efficiency on finding the optimal solutions, and it has stronger convergence than the other four particle swarm optimization algorithms. © 2014 by Binary Information Press

关键词： Particle swarm optimization (PSO)

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Large-scale assembly of Cu/CuO nanowires for nano-electronic device fabrication

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Science China(Technological Sciences) 2014年第4期57卷 734-737页

作者： XU Ke TIAN XiaoJun YU HaiBo YANG Yang ZHOU Lei LIU LianQing State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences Information & Control Engineering Faculty Shenyang Jianzhu University

To improve the efficiency of nano-electronic device fabrication, a new method named floating electrical potential assembly is proposed to realize large-scale assembly of Cu/CuO nanowires, The simulation of floating electrical potential distribution on the micro-electrode chip is performed by COMSOL software, and the simulation result shows that the coupled electrical poten- tial on the floating drain electrodes is very close to the original electrical potential applied on the gate electrode, whicb means that the method can provide di-electrophoresis （DEP） force for all the electrode pairs at one time, thus realizing large-scale as- sembly at one time. With Cu/CuO nanowires well dispersed and micro-electrode chip fabrication, nanowires assembly experiments are performed and the experimental results show that Cu/CuO nanowires are assembled at hundreds of micro-electrodes pairs at one time, and the success rate of nanowires assembly also reaches 90%.

关键词： large-scale assembly Cu/CuO nanowires floating potential di-electrophoresis

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Increasing energy efficiency of a building with minimal computational demands using model predictive control

Increasing energy efficiency of a building with minimal comp...

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Roedunet International Conference (RoEduNet)

作者： Giorgian Neculoiu Valentin Sgarciu Alexandru Viorel Marinescu Mariana Marinescu Faculty of Automatic Control and Computers Politehnica University of Bucharest1 Bucharest Romania Laboratory of Automation and Applied Informatics Technical University of Civil Engineering of Bucharest Bucharest Romania

This work is a aggregated perspective of previous papers studying advanced control strategy applicable in intermittently heated buildings. This strategy mainly aims to optimize the energy efficiency of heating systems taking into consideration the minimization of the needful time and the computational resources necessary to this process. Model Predictive control is the control strategy used in this work and the main purpose (ensuring maximum comfort with minimum energy consumption) is satisfied by using weather forecasts and building occupancy program. Several architectures presented can be used to implement the proposed solution. The main goal is to minimize the computational requirements achieving the best performance. To solve the problems from previous studies, this paper studied the solutions implemented on a single thermal zone and multiple thermal zones.

关键词： Decision support systems

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Corrigendum: Variation in polydispersity in pump- and pressure-driven micro-droplet generators (Zeng et al 2015 J. Micromech. Microeng. 25 115015)

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Journal of Micromechanics and Microengineering 2016年第3期26卷

作者： Wen Zeng Ian Jacobi Songjing Li Howard A Stone Department of Fluid Control and Automation Harbin Institute of Technology Harbin 150001 People's Republic of China Department of Mechanical and Aerospace Engineering Princeton University Princeton NJ 08544 USA Faculty of Aerospace Engineering Technion Israel Institute of Technology Haifa 32000 Israel

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Lumped Parameter Mass Flow Rate and Pressure control Characteristics Model for High-Speed Pneumatic PWM on/off Valve

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Journal of Donghua University(English Edition) 2014年第3期31卷 293-303页

作者：向忠胡旭东刘昊汝晶炜 Faculty of Mechanical Engineering & Automation Zhejiang Sci-Tech University State Key Laboratory of Fluid Power Transmission and Control Zhejiang University

Aiming at solving the problem of strong coupling characteristic of the key parameters of high-speed pneumatic pulse width modulation( PWM) on / off valve, a general lumped parameter mathematical model based on the valves time periods was well developed. With this model,the mass flow rate and dynamic pressure characteristics of constant volumes controlled by high-speed pneumatic PWM on /off valves was well described. A variable flow rate coefficient model was proposed to substitute for the constant one used in most of the prior works to investigate PWM on /off valves' dynamical pressure response, and a formula for disclosing the inherent relationship among the PWM command signal,static mass flow rate,and sonic conductance of the valve was newly ***,an extensive set of analytical experimental comparisons were implemented to verify the validity of the proposed mathematica model. With the proposed model, PWM on /off valves' characteristics,such as mass flow rate,step pressure response of the valve control system,mean pressure and ripple amplitude,not only in the linear range,but also in the nonlinear range can be wel predicted; Good agreement between measured and calculated results was obtained,which proved that the model is helpful for designing a control strategy in a closed loop control system.

关键词： lumped parameter model pneumatic on/off valve pulse width modulation(PWM) mass flow rate pressure characteristic

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An improved particle swarm optimization algorithm for chaotic synchronization based on PID control

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Journal of Information and Computational Science 2014年第9期11卷 3177-3186页

作者： Zou, Dexuan Wang, Xin Duan, Na School of Electrical Engineering and Automation Jiangsu Normal University Xuzhou 221116 China Information and Control Engineering Faculty Shenyang Jianzhu University Shenyang 110168 China

In this study, we propose a variant of Particle Swarm Optimization (PSO) algorithm for chaotic synchronization based on PID control. The new method, called Improved Particle Swarm Optimization (IPSO) algorithm employs the global best position to execute a global searching strategy such that the position updating is well finished. In addition, the IPSO introduces a mutation operation in terms of the personal best positions. By combining the global searching strategy and mutation operation, the global searching capacity of the IPSO is enhanced, and it can easily get rid of the local optimums. The performance of the IPSO is investigated on four test examples and its results are compared with those of the PSO. The empirical analysis of the experimental results demonstrates the efficiency of the IPSO. Copyright © 2014 Binary Information Press.

关键词： Three term control systems

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Research on vibration characteristics for the system of large pipeline motor and it's fixing base bracket

Research on vibration characteristics for the system of larg...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Quanfeng Li Linhong Li Surong Huang Department of Automation and Control Shanghai University Shanghai China Faculty of Engineering Shanghai Dianji University China Shanghai Electric Group Shanghai Electric Machinery Co. Ltd China

ISBN: (纸本)9781479988068

The vibration problem of the large scale high speed motor itself has been widely researched in the motor product factory, however, the actual vibration is more larger after the installation in engineering spot. This paper is taking the practical problem of western oil power station project as the research background. It is aiming at solving the strong vibration problem of the system of the oil pipeline motors in the west of China. The researching methods of the field experiment and finite element simulation are both used to analysis the characteristics of mode for the fixing base bracket system. The natural frequencies of various structure bases including all-steel, fulfilling-grouting and semi-grouting are analyzed respectively, and the reason of the system over vibration problem has been found out, and it has been verified of the improved scheme of the base system.

关键词： Vibrations Synchronous motors Pipelines Steel Prototypes AC motors Brushless motors

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Quantized nonlinear model predictive control for a building

Quantized nonlinear model predictive control for a building

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IEEE Conference on control Technology and Applications (CCTA)

作者： Matej Pčolka Eva Žáčeková Rush Robinett Sergej Čelikovsky Michael Šebek Department of Control Engineering Faculty of Electrical Engineering of Czech Technical University in Prague Czech Republic Department of Mechanical Engineering—Engineering Mechanics Michigan Technological University Houghton Michigan United States Czech Academy of Sciences Institute of Information Theory and Automation Czech Republic

In this paper, the task of quantized nonlinear predictive control is addressed. In such case, values of some inputs can be from a continuous interval while for the others, it is required that the optimized values belong to a countable set of discrete values. Instead of very straightforward a posteriori quantization, an alternative algorithm is developed incorporating the quantization aspects directly into the optimization routine. The newly proposed quaNPC algorithm is tested on an example of building temperature control. The results for a broad range of number of quantization steps show that (unlike the naive a posteriori quantization) the quaNPC is able to maintain the control performance close to the performance of the original continuous-valued nonlinear predictive controller and at the same time it significantly decreases the undesirable oscillations of the discrete-valued input.

关键词： Quantization (signal) Optimization Temperature measurement Buildings Temperature control Oscillators Temperature sensors

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Experimental Evaluation of Observer-based Throttle Valve control Using Super-Twisting Algorithm

Experimental Evaluation of Observer-based Throttle Valve Con...

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European control Conference

作者： Markus Reichhartinger Mohammad Ali Golkani Martin Horn Institute of Automation and Control Faculty of Electrical and Information Engineering Graz University of Technology

ISBN: (纸本)9781467371605

In this paper, an electronic throttle valve system is considered. The mathematical model describing the motion of the valve plate is subject to uncertainties and external disturbances. The throttle plate angle is intended to track given reference profiles. A control scheme consisting of an observer and a state controller, which both are based upon the super-twisting technique, is proposed. Effectiveness and superiority of the approach are illustrated in numerical simulation using a comparison with a classical control approach. The presented feedback loop is implemented in an engine control unit. Results obtained through comprehensive tests on an industrial combustion engine test bench are given.

关键词： Valves Observers Engines Angular velocity Uncertainty Feedback loop Mathematical model

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Algorithm for fast determination of LiFePO4 battery nominal current

Algorithm for fast determination of LiFePO4 battery nominal ...

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2014 37th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2014

作者： Sirotić, Igor Šunde, Viktor Ban, Željko Faculty of Electrical Engineering and Computing Department of Electric Machines Drives and Automation Zagreb Croatia Faculty of Electrical Engineering and Computing Department of Control and Computing Engineering Zagreb Croatia

ISBN: (纸本)9789532330816

The development of production and increasing usage of light electric vehicles such as electric bicycles and electric scooters entails development of batteries, battery chargers and fast charging algorithms. Batteries with different nominal electrical characteristics and production technologies are currently in use. Among them, lithium-iron batteries are increasingly being used. The differences in basic characteristics of batteries and standardization issues require fast identification of various battery types and adapting of charging algorithms according to nominal current, voltage, capacity and state of charge. This paper describes a method for determining the nominal current for unknown LiFePO4 battery connected to the stationary filling station for charging electric bicycles. A prerequisite for determination of the rated current is identification of current-voltage curve at the moment of connection and identification of the number of cells. The algorithm for determining these parameters is given in the first part of the paper. The second part deals with determination of the nominal current for LiFePO4 battery based on current-voltage response to the selected battery charging algorithm. © 2014 MIPRO.

关键词： Lithium compounds

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