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8th International Symposium on Advanced control of Chemical processes, ADCHEM 2012

作者： Csercsik, Dvid Hangos, Katalin M. Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary

ISBN: (纸本)9783902823052

In this paper we propose a novel colored timed Petri net modelling approach for model structure validation of cell signaling pathways. The aim is to distinguish between models of different structures based on typically qualitative, roughly detailed measurement data. In this approach, tokens are present all the time at all of the places, and their color corresponds to the actual quantized activation state of the signaling component. The activation states are updated according to the progression of the signal through the signaling network. We demonstrate the results on a signaling network, which describes the interaction of fast (G protein coupled) and slow (β-arrestin coupled) transmission. © 2012 IFAC.

关键词： Cell signaling

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Two-Degree-of-Freedom Helicopter Closed-loop Identification through a Cascade controller

Two-Degree-of-Freedom Helicopter Closed-loop Identification ...

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7th International Conference on MEMS, NANO and Smart systems (ICMENS 2011)

作者： Ghalei, Pouya Fatehi, Alireza Arvan, Mohamadreza Advanced Process Automation and Control (APAC) Research Group K.N. Toosi University of Technology Tehran Iran Electrical Engineering Department Malek-Ashtar University of Technology Tehran Iran

ISBN: (纸本)9783037853122

Input-Output data modeling using multi layer perceptron networks (MLP) for a laboratory helicopter is presented in this paper. The behavior of the two degree-of-freedom platform exemplifies a high order unstable, nonlinear system with significant cross-coupling between pitch and yaw directional motions. This paper develops a practical algorithm for identifying nonlinear autoregressive model with exogenous inputs (NARX) and nonlinear output error model (NOE) through closed loop identification. In order to collect input-output identifier pairs, a cascade state feedback (CSF) controller is introduced to stabilize the helicopter and after that the procedure of system identification is proposed. The estimated models can be utilized for nonlinear flight simulation and control and fault detection studies.

关键词： Twin rotor helicopter MLP neural network NARX NOE Cascade State Feedback controller

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Model Structure Validation of Cell Signaling Pathways Using Colored Petri nets *

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IFAC Proceedings Volumes 2012年第15期45卷 463-468页

作者： Dvid Csercsik Katalin M. Hangos Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary

关键词： Modeling and Identification control Applications in Biological processes

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Multiobjective bio-inspired algorithm based on membrane computing

Multiobjective bio-inspired algorithm based on membrane comp...

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2012 International Conference on Computer Science and Information processing, CSIP 2012

作者： Zhao, Jin-Hui Wang, Ning Zhou, Ping State Key Laboratory of Synthetical Automation for Process Industries Northeastern University Shenyang 110819 China National Laboratory of Industrial Control Technology Institute of Cyber-Systems and Control Zhejiang University Hangzhou China Research Centre of Automation Northeastern University Shenyang 110819 Liaoning China

ISBN: (纸本)9781467314114

This paper presents a new multiobjective bio-inspired algorithm based on membrane computing (MOBIAMC). Similar to the single objective bio-inspired algorithm based on membrane computing (BIAMC), MOBIAMC has a netted membrane structure. Most rules are different from those used in BIAMC. The proposed algorithm applies no operation on keeping the uniformity and variety of candidate solution set or non-dominate solution set in the process of approaching to the true Pareto-optimal front due to its parallel and distributed computation. The comparisons with three multiobjective evolutionary algorithms illuminate that the proposed algorithm is simple and computes fast with high precision in approaching to the true Pareto-optimal fronts of eight benchmark multiobjective optimization functions. © 2012 IEEE.

关键词： Multiobjective optimization

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Model-free adaptive PID controllers applied to the Benchmark PID'12

Model-free adaptive PID controllers applied to the Benchmark...

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2nd IFAC Conference on Advances in PID control, PID 2012

作者： Silveira, Antonio S. Coelho, Antonio A.R. Gomes, Francisco J. Research Group in Applied Control Technologies Dept. of Automation and Systems Federal University of Santa Catarina PO Box 476 88040-900 Florianópolis SC Brazil

ISBN: (纸本)9783902823182

Many tuning strategies for PID control algorithms have been proposed in the literature depending on modeling choice from heuristics, physical laws and/or experimental essays. In this paper, the properties of three model-free adaptive PID control design conceptions, known as direct PID control, are investigated and implemented. The recursive least squares estimator is used to identify the PID controller gains without the knowledge of the plant mathematical model. The tuning strategies of the direct PID controller are applied to the boiler control system proposed by Fernando Morilla (UNED, Spain) as a benchmark problem for the 2012 IFAC Conference on Advances in PID controllers.

关键词： Three term control systems

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An entropy approach to filtering for networked control systems

An entropy approach to filtering for networked control syste...

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作者： Zhang, Jianhua Du, Lilong Wang, Aiping Wang, Hong School of Control and Computer Engineering North China Electric Power University Beijing 102206 China Institute of Computing Sciences Anhui University Hefei China Control Systems Centre University of Manchester Manchester M601QD United Kingdom Key Laboratory of Integrated Automation of Process Industry Ministry of Education and Research Center of Automation Northeastern University Shenyang China

This paper is concerned with minimum error entropy filter design for non-linear Networked control systems (NCSs) with multiple-packet transmission mechanism. Since the error of the filter in NCSs is generally non-Gaussian, the filter is designed under the information theoretic learning frame. The convergent condition of the proposed filter is established. A simulation example shows that the proposed approach is feasible and effective. Copyright © 2012 Inderscience Enterprises Ltd.

关键词： Entropy

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On the geometry of equilibrium solutions of kinetic systems obeying the mass action law

On the geometry of equilibrium solutions of kinetic systems ...

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8th International Symposium on Advanced control of Chemical processes, ADCHEM 2012

作者： Alonso, Antonio A. Szederkényi, Gábor Process Engineering Group IIM-CSIC Spanish National Research Council C/Eduardo Cabello 6 36208 Vigo Spain Systems and Control Laboratory MTA SZTAKI Kende u. 13-17 H-1111 Budapest Hungary

ISBN: (纸本)9783902823052

In this contribution the problem relating dynamic behavior and parameter values for weakly reversible chemical reaction networks (CRNs) that obey the mass action law is revisited. The approach is founded on previous methods and results discussed in [15, 16] for weakly reversible CRNs. Two new research directions are however undertaken in this study, one of them exploits an alternative factorization of the Kernel of the Kirchhoff matrix Ak which in a natural way links complex balance with zero deficiency. The other one intends to use the convex structure of the so-called family of solutions described in [15] on the space of reaction channels. © 2012 IFAC.

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Non-monotonic fuzzy state feedback controller design for discrete Time T-S fuzzy systems

Non-monotonic fuzzy state feedback controller design for dis...

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International Conference on Fuzzy systems and Knowledge Discovery (FSKD)

作者： Siavash Fakhimi Derakhshan Alireza Fatehi Mehrad Ghasem Sharabiany Advanced Process Automation and Control (APAC) Research Group K. N. Toosi University of Technology Tehran Iran

In this paper a new approach is proposed to design state feedback controllers for well known T-S fuzzy systems. The used controller structure is in familiar parallel distributed compensation (PDC) format and the Lyapunov candidate is the frequently used common quadratic one. The only difference is the stability theorem used which is a revised version of Lyapunov stability theorem that relaxes monotonic condition. It is shown that the proposed method is less conservative than common quadratic method and piecewise method.

关键词： Lyapunov methods Fuzzy systems Stability analysis Asymptotic stability State feedback Linear matrix inequalities Symmetric matrices

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Flow measurement of biomass and blended biomass fuels in pneumatic conveying pipelines using electrostatic sensor-arrays

Flow measurement of biomass and blended biomass fuels in pne...

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作者： Qian, Xiangchen Yan, Yong School of Electrical Engineering and Automation Tianjin University Tianjin 300072 China Instrumentation Control and Embedded Systems Research Group School of Engineering and Digital Arts University of Kent CT2 7NT Canterbury United Kingdom

Key parameters such as particle velocity, concentration of solid particles, and stability of pulverized fuel flow in fuel injection pipelines are useful to power plant operators to detect fuel supply problems at an early stage. This paper presents the use of a novel multichannel instrumentation system with circular and arc-shaped electrostatic sensor arrays for the online continuous measurement of mean and local characteristics of blended biomass flow. Experimental tests were conducted on a pneumatic conveying test rig under various flow conditions on both horizontal and vertical pipes. The biomass fuels tested include willow, wood, and bark. A ground grain (flour) was used to replicate a biomass of finer particles. The results suggest that, due to the physical differences between the constituent biomass fuels, the characteristics of the flow depend on the proportion of larger biomass particles in the blend. It is found that pure flour particles travel faster and carry more electrostatic charge than those of larger biomass particles. As more biomass particles are added to the flow, the overall velocity of the flow slows down, the electrostatic charge level decreases, and the flow becomes less stable compared to the pure flour flow. Particles in the vertical pipe are found to be more evenly distributed, and the particle velocity profile across the pipe cross section is more regular when compared to those in the horizontal pipe. © 2012 IEEE.

关键词： Pneumatics

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Assessment of two pressure-velocity coupling strategies for local meshless numerical method

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9th International Conference on Advances in Fluid Mechanics - Advances in Fluid Mechanics IX, AFM 2012

作者： Kosec, G. Vertnik, R. Šarler, B. Jožef Stefan Institute Laboratory for Parallel and Distributed Computing Slovenia University of Nova Gorica Laboratory for Multiphase Processes Slovenia Štore steel d.o.o. Research Slovenia Centre of Excellence for Biosensors Automation and Process Control Laboratory for Advanced Materials Systems Slovenia

ISBN: (纸本)9781845646004

The performance of two pressure-velocity coupling strategies, associated with the primitive variable solution of incompressible Newtonian fluid with the meshless Local Radial Basis Function Collocation Method (LRBFCM), is compared with respect to computational efficiency, stability, accuracy and spatial convergence. The LRBFCM is structured with multiquadrics on five noded support domains. The explicit time stepping is used. The Backward- Facing Step problem (BFS) has been selected as a benchmark problem, previously tackled by several numerical methods. The semi-local fractional step method (FSM) and completely local pressure-velocity couplings (LPVC) are compared. The numerical results are validated against previously published data. The results are represented and compared in terms of a convergence plot of the reattachment position. We show that both approaches provide reasonable results;however, LVPC is less computationally complex and less stable in comparison to FSM. © 2012 WIT Press.

关键词： Computational efficiency

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