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Approximating the minimal sensor selection for supervisory control

IFAC Proceedings Volumes 2004年第18期37卷 87-92页

作者： Samir Khuller Guy Kortsarz Kurt R. Rohloff Department of Computer Science University of Maryland College Park MD 20742 USA Computer Science Department Business and Science Building Rutgers University Camden NJ USA Department of EECS The University of Michigan 1301 Beal Avenue Ann Arbor MI 48109-2122 USA

This paper discusses the problem of selecting a set of sensors of minimum cardinality that can be used for the synthesis of a supervisory controller. We show how this sensor selection problem is related to a type of directed graph st -cut problem that has not been previously discussed in the literature. Approximation algorithms to solve the sensor selection problem can be used to solve the graph cut problem and vice-versa. Polynomial time algorithms to find good approximate solutions to either problem most likely do not exist (under certain complexity assumptions), but a time efficient approximation algorithm is shown that solves a special case of these problems.

关键词： Discrete-Event systems Supervisory control Graph Theory Approximation Algorithms Observers computer-aided control system design

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An Expert system Approach to SISO controller design

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IFAC Proceedings Volumes 1996年第1期29卷 5594-5599页

作者： Hwe-Huang Chang Ming-Hwei Perng Department of Power Mechanical Engineering in the National Tsing Hua University Hsinchu Taiwan 30043 R.O.C.

A forward reasoning procedure is developed based on the Bode gain-phase relationship and the concept of ideal loop shaping to achieve the goal that consistence of various design requirements can eventually be examined and adapted completely by an expert system. In addition, a two-step design procedure is proposed to enhance the strength of the reasoning procedure. It can assist a designer not only in performing a design, but also in handling conflicting design requirements and formulating an achievable specification. Moreover, the designer reserves all freedom in trade-off and selecting the structure of a controller.

关键词： Expert systems Interactive approaches computer-aided control system design control systems Intelligence

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Solving Multi-Objective Linear control design Problems Using Genetic Algorithms

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IFAC Proceedings Volumes 2008年第2期41卷 12324-12329页

作者： Gustavo Sánchez Minaya Villasana Miguel Strefezza Universidad Simón Bolívar. Departamento de Tecnología Industrial. Sartenejas. Edo. Miranda. Venezuela Universidad Simón Bolívar. Departamento de Cómputo Científico. Sartenejas. Edo. Miranda. Venezuela Universidad Simón Bolívar. Departamento de Procesos y Sistemas. Sartenejas. Edo. Miranda. Venezuela

Two multi-objective genetic algorithms, an elitist version of MOGA and NSGA-II, were applied to solve two linear control design problems. The first was a H 2 problem with a PI controller structure, for a first order stable plant. The second was a mixed H 2 /H ∞ control problem. In both cases, three indicators were used to evaluate each algorithm performance: Set coverage, spread and hypervolume. It was found that NSGA-II shows better performance indicators. Moreover, for the second problem, a new controller representation was proposed with corresponding cross-over and mutation operators. This approach was able to find solutions as good as those previously published. The main advantage is that the stability restriction disappears, allowing to deal with an unconstrained optimization problem.

关键词： computer-aided control system design Genetic algorithms Multiobjective optimisation

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MATLAB AND SYSQUAKE TOOLS FOR TUNING MULTI-RATE PID controlLERS

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IFAC Proceedings Volumes 2006年第6期39卷 446-451页

作者： Alfredo Cuesta Luis Grau C.E.S. Felipe II UCM. Spain Department of Computers and Automatic UNED. Spain

Multi-rate controllers are not simple to design but easy to implement in any simulation software. This paper presents a tool developed both for Matlab and Sysquake which helps tuning, testing and study multi-rate PID ... 详细信息

关键词： Multirate PID controllers computer-aided control system design Tuning characteristics Educational aids Simulators

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H ∞ controller synthesis for AGV trajectory tracking using a linearized kinematic model

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IFAC-PapersOnLine 2019年第15期52卷 61-66页

作者： Laurens Jacobs Andreas De Preter Jan Anthonis Jan Swevers Goele Pipeleers MECO Research Team Dept. of Mechanical Engineering KU Leuven Leuven Belgium DMMS lab Flanders Make Leuven Belgium Octinion bvba Leuven Belgium

This paper proposes a design procedure for H ∞ optimal linear feedback controllers for trajectory tracking of an automated guided vehicle (AGV) based on a linearized kinematic model. The design specifications are expressed as a constrained H ∞ norm optimization problem to assess the potential of the H ∞ framework for the considered application. This problem is then solved for a linear parameter-varying (LPV), a full-block and a decoupled linear time-invariant (LTI) controller. The performance of all controllers is compared through numerical simulations and experiments on an AGV prototype targeted at agricultural applications.

关键词： automated guided vehicles linear parameter-varying control robust control feedback control computer-aided control system design experimental validation

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PROGRAMMING AND COMPUTING TOOLS FOR JET ENGINE control design

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IFAC Proceedings Volumes 2005年第1期38卷 520-525页

作者： Florian Vary Luc Reberga Snecma Moteurs Villaroche France CNRS-LAAS Toulouse France

This paper briefly presents ATOL, which is a tool developed at Snecma Moteurs for jet engine controller design. ATOL could be considered as an interfacing tool with many identification and design algorithms. ATOL is able to make advanced synthesis of controllers, such as LPV H ∞ synthesis by solving LMIs. ATOL can also design controllers by using a traditional pole placement technique.

关键词： Engine control computer-aided control system design turbofan engine

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USAGE OF BORIS ENVIRONMENT FOR control OF REAL-TIME LABORATORY MODEL

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IFAC Proceedings Volumes 2006年第6期39卷 88-93页

作者： Petr Chalupa Bata University in Zlin Faculty of Applied Informatics Department of Process Control Centre of Applied Cybernetics Nad Stránêmi 4511 760 01 Zlín Czech Republic

The paper deals with the usage of a BORIS control and simulation environment for the identification and control of a real-time laboratory model. Identification and control experiments were performed using Gas Flow control model by Leybold. This model is a part of a Real-time Models Laboratory at Tomas Bata University in Zlin. The aim of this paper is to introduce an experiment performed using the BORIS environment and explore usability of this environment for the real-time control. Interoperability and comparison with the well-known MATLAB/Simulink environment is also discussed.

关键词： Real-time computer systems computer-aided control system design Educational aids PID control Identification

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MAKING OF STATE SPACE FORMULATIONS OF DYNAMIC systemS

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IFAC Proceedings Volumes 2006年第16期39卷 932-937页

作者： R. Neugebauer H. Knüpfer A. Illgen B. Kranz Institute for Machine Tools and Forming Technology Reichenhainer Str. 88 09126 Chemnitz Germany Phone: +49 (0) 351/4772-2321 Fax: +49 (0) 351/4772-2303

Complex dynamic systems can be simulated using ANSYS®(ANSYS, Inc., Canonsburg, PA, USA) but for controller design Simulink®(MathWorks, Inc., Natick, MA, USA) is the appropriate software tool. The MATLAB®(MathWorks, Inc., Natick, MA, USA) program makeStateSpace , which is introduced in this paper, transfers the results of ANSYS modal analysis into a modal state space formulation that can then be included in Simulink. A model order reduction to diminish the system size is also possible. Hence, with the help of makeStateSpace the advantages of both powerful software tools ANSYS and Simulink can be used for controller design.

关键词： State Space Realization Software tools computer-aided control system design Simulation Modelling Mode analysis system order reduction Dynamic properties Complex systems

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Mapping Real-time control Algorithms onto Heterogeneous Architectures

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IFAC Proceedings Volumes 1995年第5期28卷 525-530页

作者： M.J. Baxter M.O. Tokhi P.J. Fleming Department of Automatic Control and Systems Engineering The University of Sheffield Mappin Street Sheffield SI 3JD U.K

Mapping is the off-line allocation of the tasks that represent a parallelised algorithm across a multiprocessor architecture. In this paper the target architecture is heterogeneous, where a number of computationaly disparate processors are integrated within a single network. This paper describes three mapping approaches that attempt to minimise the cycle time of several parallelised algorithms. The mapping algorithms have been embedded into a suite of design tools that allow a rapid translation from an application algorithm to a parallel implementation. These tools are used to explore the efficacy of the mapping algorithms. A simple heuristic is appraised first, followed by an examination of a genetic algorithm (GA) approach. Initially, the GA utilises a simple parallel architecture model. However, this leads to the embedding of the target hardware within the objective function to improve performance. Finally, the effectiveness of these approaches are examined and contrasted.

关键词： computer-aided control system design Digital signal processing Heterogeneous architectures Parallel processing Real-time computer systems Scheduling Algorithms

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design and Experimental Evaluation of a Multivariable Grinding Circuit control system

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IFAC Proceedings Volumes 1983年第15期16卷 189-197页

作者： S.-L. Jämsä H. Melama J. Penttinen Technical Research Centre of Finland Finland Outokumpu Oy Finland Prodycon Oy Finland

The multivariable control that was designed for the primary grinding in the Vuonos concentrator can control important variables like the final particle size and the density of the cyclone feed. The controller was designed for the plant using an interactive CACSD-software package which included the use of the inverse Nyquist array method. The control algorithms designed were implemented in the control computer in Vuonos and there was good agreement between the simulated results and the full scale tests: Changes of the setpoint of either one controlled output variable produced satisfactory responses, while the other controlled output simultaneously remained close to the desired constant value. The multivariable controller designed has been taken into continuous use in Vuonos. Autocovariance and spectral density functions have been calculated in order to analyse the behaviour of the final particle size and the density of the cyclone feed. According to the results obtained in the design by the inverse Nyquist array method and the experiments at the Vuonos Mill, this technique is suitable for the design of multivariable control of grinding. A practical advantage of this design technique is the simplicity of the final controller and the use of standard control algorithms.

关键词： Multivariable control systems Inverse Nyquist Array method computer-aided control system design Grinding control engineering computer applications

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