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2012 UKACC International Conference on control, control 2012

作者： Liu, Rui-Juan Liu, Guo-Ping Wu, Min School of Information Science and Engineering Central South University Changsha 410083 China Faculty of Advanced Technology University of Glamorgan Pontypridd CF37 1DL United Kingdom Hunan Engineering Laboratory for Advanced Control and Intelligent Automation Changsha 410083 China

ISBN: (纸本)9781467315609

This paper presents a novel decoupling method for multivariable systems with disturbances. In this method, the undesirable coupling parts in each loop are treated as the output disturbances. These disturbances, as well as the external disturbances, can be actively rejected by the equivalent-input- disturbance (EID) approach. The parameters of the controller in each loop can be designed independent of each other. A typical example demonstrates the simplicity in parameters design and good performance in decoupling control and disturbance rejection. © 2012 IEEE.

关键词： Disturbance rejection

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Principles of the active collision mitigation system for vehicles involved in light impact 13

Principles of the active collision mitigation system for veh...

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13th Mini Conference on Vehicle System Dynamics, Identification and Anomalies, VSDIA 2012

作者： Mihály, András Gáspár, Péter Szabó, Zoltán Sename, Oliver Dugard, Luc Department of Control and Transport Automation Faculty of Transportation Engineering and Vehicle Engineering Budapest University of Technology and Economics Bertalan L. U. 2. Budapest Hungary Computer and Automation Research Institute Systems and Control Laboratory Kende U. 13-17 Budapest Hungary Control Systems Department GIPSA-Lab 11 Rue des Mathématiques ENSE3 BP 46 St martin d'Hrescedex GrenobleF-38402 France

ISBN: (纸本)9789633131022

The paper presents a collision mitigation method in which the aim is to stabilize the motion of the vehicle after a light impact has occurred. A yaw rate servo control based on the bicycle model is applied for control purposes. The collision is assumed to have been detected by a passive safety system, e.g., airbag sensors. The control system is activated by the monitoring signal. After the collision has occurred the motion of the vehicle and the operation of the control system are illustrated through CarSim simulation examples. Two control solutions are analyzed: in the first case active steering is used while in the second case steering is combined with differential braking. With the knowledge of certain vehicle parameters and the impact force and direction, post impact vehicle states (yaw rate, velocities, roll rate) can be analyzed. A sensitivity analysis is carried out to determine the validity range of the vehicle model in the presence of uncertainties and different kinds of impact forces. Several software packages are used for the design and analysis of the controlled system. The control design is performed by using the Matlab/Simulink software and the verification of the designed controller is performed by using the CarSim software.

关键词： Automobile steering equipment

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Model-Free control or Active Disturbance Rejection control? On different approaches for attenuating the perturbation

Model-Free Control or Active Disturbance Rejection Control? ...

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Mediterranean Conference on control and automation (MED)

作者： Rafal Madoński Przemyslaw Herman Chair of Control and Systems Engineering Faculty of Computer Science Poznan University of Technology Poznan Poland

This paper is focused on a comparison between Model-Free control and Active Disturbance Rejection control methods. These two techniques do not require a detailed mathematical description of the system, since they base on the on-line estimation and rejection of the unmodeled elements of the dynamics. Robustness of the closed-loop control system (against external perturbation) and its relation to energy consumption is discussed here. A model of a planar manipulator is used in the conducted case study as an exemplary plant. Conclusions are supported with results obtained with numerical simulations.

关键词： Gears Scalability

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Application of idea of time-scale control to synthesis of control signals for linear and non-linear plants

Application of idea of time-scale control to synthesis of co...

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International Conference on Methods and Models in automation and Robotics (MMAR)

作者： Bogdan Grzywacz Faculty of Electrical Engineering Chair of Control and Measurements West Pomeranian University of Technology Szczecin Poland

The concept of control of plants represented by (1) has been proposed. Using (2),(3),(4),(5) one can determine plant input U(t) forming its output as Y(T), where “new” time T depending on time-scale A(t) is defined by dT=A(t) dt, whereas Y(t) is plant “reference” output obtained for A=1. Signal A(t) is obtained as result of static operation A(t)=q(e(t)), where q(0)=0 and e(t) is control system error. The technical applications can base on MFC structure (Fig. 4). The idea of control is simple: if e(t)=A(t)=0, then model (2) is decoupled, values of its state variables and output y are conserved. Because Y follows y (Fig. 4), then changes of plant output are stopped too. If e(t)=A(t) ≠0, then y and Y tend to reference signal y o and rate of follow-up action depends on q(e(t)). During this process the consecutive outputs of model and plant are y(T) and Y(T). Thus, the “reference” response Y(t) defines Y (T). The impressive results illustrating properties of proposed concept are shown in Fig. 5,6. Application of described method simplifies the analysis of system dynamics and yields perfect results of follow-up action (lack of overshoots, short setting times). The idea for SISO case has been generalized to form enabling control of MIMO plants.

关键词： Mathematical model MIMO Equations Frequency domain analysis Transient analysis Vectors Process control

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The extended co-learning framework for robust object tracking

The extended co-learning framework for robust object trackin...

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2012 13th IEEE International Conference on Multimedia and Expo, ICME 2012

作者： Gong, Chen Liu, Yang Li, Tianyu Yang, Jie He, Xiangjian Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Shanghai China Faculty of Engineering and Information Technology University of Technology Sydney PO Box 123 Sydney NSW Australia

ISBN: (纸本)9781467316590

Recently, object tracking has been widely studied as a binary classification problem. Semi-supervised learning is particularly suitable for improving classification accuracy when large quantities of unlabeled samples are generated (just like tracking procedure). The purpose of this paper is to fulfill robust and stable tracking by using collaborative learning, which belongs to the scope of semi-supervised learning, among three classifiers. Different from [1], random fern classifier is incorporated to deal with 2bitBP feature newly added and certain constraints are specially implemented in our framework. Besides, the way for selecting positive samples is also altered by us in order to achieve more stable tracking. Algorithm proposed in this paper is validated by tracking pedestrian and cup under occlusion. Experiments and comparison show that our algorithm can avoid drifting problem to some degree and make tracking result more robust and adaptive. © 2012 IEEE.

关键词： Supervised learning

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Stability of Markovian jump systems over networks via delta operator approach

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Circuits, Systems, and Signal Processing 2012年第1期31卷 107-125页

作者： Yang, Hongjiu Xia, Yuanqing Shi, Peng Fu, Mengyin Department of Automatic Control Beijing Institute of Technology Beijing 100081 China Department of Computing and Mathematical Sciences University of Glamorgan Pontypridd CF37 1DL United Kingdom School of Engineering and Science Victoria University Melbourne 8001 VIC Australia Faculty of Automation Harbin University of Science and Technology Harbin China

This paper investigates the problem of stability for a class of linear uncertain Markovian jump systems over networks via the delta operator approach. The sensor-to-controller random network-induced delay and arbitrary packet losses are considered for mode-dependent time delays. That is, a Markov process is used to model the time-varying delays which are dependent on the system mode. Based on the Lyapunov-Krasovskii functional in the delta domain, a new sufficient condition for the solvability of the stability problem is presented in terms of linear matrix inequalities. A numerical example is given to illustrate the effectiveness of the techniques developed. © Springer Science+Business Media, LLC 2011.

关键词： Networked control systems

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Exploring possibilities of predictive self-programming thermostats for energy savings

Exploring possibilities of predictive self-programming therm...

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ELEKTRO

作者： Tomas Miklušcak Andrej Kapjor Aleš Janota Ondrej Biroš Department of Control and Information Systems Faculty of Electrical Engineering ž½ilina Slovakia Faculty of Mechanical Engineering Department of Control and Information Systems University of Žilina Zilina Slovakia Faculty of Electrical Engineering Department of Control and Information Systems University of Žilina Zilina Slovakia Faculty of Mechanical Engineering Department of Automation Control and Human Machine Interaction Technical University of Košice Kosice Slovakia Department of Automation Control and Human Machine Interaction Košice Slovakia

In this paper we present predictive self-programming thermostat which controls the heating of a smart environment based on occupancy prediction. We present results of 290 days-long simulation as well as limits of simi... 详细信息

关键词： Thermostats Heating Buildings Schedules Sensors Temperature distribution

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Evaporator unit as a benchmark for plug and play and fault tolerant control

Evaporator unit as a benchmark for plug and play and fault t...

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8th IFAC Symposium on Fault Detection, Supervision and Safety of Technical Processes, SAFEPROCESS 2012

作者： Izadi-Zamanabadi, Roozbeh Vinther, Kasper Mojallali, Hamed Rasmussen, Henrik Stoustrup, Jakob Danfoss A/S Nordborgvej 81 DK-6430 Nordborg Denmark Faculty of Engineering University of Guilan P.O. Box: 41635-3756 Iran Department of Electronic Systems Section of Automation and Control Aalborg University Aalborg Denmark

ISBN: (纸本)9783902823090

This paper presents a challenging industrial benchmark for implementation of control strategies under realistic working conditions. The developed control strategies should perform in a plug & play manner, i.e. adapt to varying working conditions, optimize their performance, and provide fault tolerance. A fault tolerant strategy is needed to deal with a faulty sensor measurement of the evaporation pressure. The design and algorithmic challenges in the control of an evaporator include: unknown model parameters, large parameter variations, varying loads, and external discrete phenomena such as compressor switch on/off or abrupt change in compressor speed. © 2012 IFAC.

关键词： Fault tolerance

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Identification of Distributed Systems with Logical Interaction Structure

Identification of Distributed Systems with Logical Interacti...

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IEEE Annual Conference on Decision and control

作者： Simone Martini Adriano Fagiolini Laura Giarre Antonio Bicchi Interdep. Research Center "E. Piaggio" Faculty of Engineering Universita di Pisa Automation and Control Laboratory DIEETCAM Faculty of Engineering Universita di Palermo

ISBN: (纸本)9781467320658

This paper focuses on the structure identification problem for a class of networked systems, where the interaction among components or agents is described through logical maps. In particular, agents are heterogeneous cooperating systems, i.e. they may have different individual dynamics and different interaction rules depending on input events. While we assume that the individual agents' dynamics are known, each agent has partial knowledge of the logical map encoding the interaction of another agent with its neighbors. Based on the so-called algebraic normal form for binary functions, we present a technique by which the network structure described by a logical function can be dynamically estimated as its truth table is observed. The estimated map is a lower approximation of the real one, which coincides with it as soon as the truth table is entirely observed. Application of the proposed technique to a real system, where agents are mobile robots whose motion depends on logical conditions on their neighborhood, is finally presented.

关键词： Agents Truth table Distributed Systems logical Logic functions Lower Approximation binary function Mobile robots maps NETWORK STRUCTURE

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ℋ∞Filter Design with Minimum Entropy for Continuous-Time Linear Systems

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Mathematical Problems in engineering 2013年第1期2013卷

作者： Jie Zhang Hamid Reza Karimi Zhong Zheng Ming Lyu Yuming Bo School of Automation Nanjing University of Science and Technology Nanjing 210094 *** Department of Engineering Faculty of Engineering and Science University of Agder 4898 Grimstad Norwayuia.no Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 *** Information Overall Department North Information Control Group Co. Ltd. Nanjing 211153 China

We deal with the design problem of minimum entropy ℋ ∞ filter in terms of linear matrix inequality (LMI) approach for linear continuous-time systems with a state-space model subject to parameter uncertainty that belongs to a given convex bounded polyhedral domain. Given a stable uncertain linear system, our attention is focused on the design of full-order and reduced-order robust minimum entropy ℋ ∞ filters, which guarantee the filtering error system to be asymptotically stable and are required to minimize the filtering error system entropy (at s 0 = ∞ ) and to satisfy a prescribed ℋ ∞ disturbance attenuation performance. Sufficient conditions for the existence of desired full-order and reduced-order filters are established in terms of LMIs, respectively, and the corresponding filter synthesis is cast into a convex optimization problem which can be efficiently handled by using standard numerical software. Finally, an illustrative example is provided to show the usefulness and effectiveness of the proposed design method.

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