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检索条件"任意字段=26th International Conference on Methods and Models in Automation and Robotics"

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New Results for Position Estimation in Electro-Magnetic Actuators Using a Modified Discrete Time Class A/B Model Reference Approach 19

New Results for Position Estimation in Electro-Magnetic Actu...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Straussberger, Florian Schwab, Manuel Braun, Tristan Reuter, Johannes Univ Appl Sci Konstanz Inst Syst Dynam Constance Germany

ISBN: (纸本)9781479950812

In this paper, a number of new results are presented that have been achieved with a previously suggested approach for estimating the armature position of electro-magnetic actuators. With the assumption that only current and voltage measurements are available, a discrete time model reference adaptive system (MRAS) is used. It is shown that by identification of the parameters of the electrical subsystem, an accurate estimate for the armature position can be obtained. A combination of two discrete time MRAS methods is proposed in order to take advantage of their complementary properties. It is shown in practical experiments that with this approach robust and fast estimation of the electrical parameters is achieved and the position estimation can thus be solved in real world applications. Moreover, the dependencies of the electrical parameters on the magnetic hysteresis are shown.

关键词： discrete time systems electric current measurement electromagnetic actuators position measurement voltage measurement armature position estimation current measurements discrete time MRAS methods electrical subsystem electro-magnetic actuators magnetic hysteresis modified discrete time class A/B model reference approach voltage measurements Actuators Adaptation models Current measurement Estimation Position measurement Solenoids Transfer functions Electric current measurement Position measurement voltage measurement electromagnetic actuators Magnetic hysteresis position estimation Solenoids actuators discrete time systems Current measuring TRANSFER FUNCTIONS Adaptation models electrical parameter discrete-time ELECTROMAGNETIC

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Data-driven self-tuning control by iterative learning control with application to optimize the control parameter of turbocharged engines 19

Data-driven self-tuning control by iterative learning contro...

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2014 19th international conference on methods and models in automation and robotics, MMAR 2014

作者： Noack, René Jeinsch, Torsten Sari, Adel Haghani Abandan Weinhold, Nick Institute of Automation University of Rostock Rostock Germany Department Powertrain Mechatronics Gasoline Engine Systems IAV GmbH Gifhorn Germany

ISBN: (纸本)9781479950812

the applications of iterative learning control (ILC) in control of modern process and mechatronic system have received more attentions in recent years. this is due the fact that ILC does not depend on physical model of the system. In the application of ILC in automotive industry, the restriction is that these methods calculate the input value and the tuning of an available controller with fixed structure is not possible. To solve this problem a method is proposed in this paper which consists of two main steps: the first step is the calculation of an input variable, based on an ILC algorithm, and the second step is the optimization of the given parameters of the feedforward controller. the performance and effectiveness of the proposed method are shown with experiments on a test vehicle with an one stage turbocharged gasoline motor with wastegate. © 2014 IEEE.

关键词： Automotive industry

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Discretisation & Control of Irregularly Actuated and Sampled LTI systems 19

Discretisation & Control of Irregularly Actuated and Sampled...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Klauer, Christian Schauer, thomas Tech Univ Berlin Control Syst Grp Berlin Germany

ISBN: (纸本)9781479950812

Motivated by control tasks in neuro-prosthetic systems, a method for the exact discretisation of continuoustime LTI systems in presence of irregular actuation and sampling times is presented. In this approach, sequences for the desired sampling and actuation times form additional inputs to the discrete-time systems. An analytical evaluation for a class of practically relevant systems is presented that yields discretetime state-space systems with non-constant coe ffi cients. Because of the non-linearity introduced by the irregular time intervals, a linearising controller is proposed that allows to re-use standard linear controllers. A simulation example demonstrates the feasibility of the presented control approach for a neuroprosthetic system.

关键词： discrete time systems linear systems neurophysiology prosthetics state-space methods continuous-time LTI systems control approach control tasks discrete-time state-space systems irregular actuation irregularly actuated sampled LTI systems linear controllers linear time-invariant systems neuroprosthetic systems sampling times Continuous time systems Control systems Discrete-time systems Eigenvalues and eigenfunctions Fatigue Time measurement Vectors discrete time systems control task linear controllers Continuous time systems State-space methods time measurement Eigenfunctions Prosthesis control systems Neurophysiology Linear system Fatigue sampling time LTI Time invariant systems

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Nonlinear models of BPSK costas loop 11

Nonlinear models of BPSK costas loop

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11th international conference on Informatics in Control, automation and robotics, ICINCO 2014

作者： Kudryashova, E.V. Kuznetsova, O.A. Kuznetsov, N.V. Leonov, G.A. Seledzhi, S.M. Yuldashev, M.V. Yuldashev, R.V. Faculty of Mathematics and Mechanics Saint-Petersburg State University Universitetsky pr. 28 Saint-Petersburg198504 Russia FIN-40014 Finland

ISBN: (纸本)9789897580390

Rigorous nonlinear analysis of the physical model of Costas loop is very difficult task, so for analysis, simplified mathematical models and numerical simulation are widely used. In the work it is shown that the use of simplified mathematical models, and the application of non rigorous methods of analysis may lead to wrong conclusions concerning the operability of Costas loop.

关键词： Phase locked loops

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Fault accommodation of the Two Rotor Aero-dynamical system using the state space neural networks based model predictive control 19

Fault accommodation of the Two Rotor Aero-dynamical system u...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Czajkowski, Andrzej Patan, Krzysztof Univ Zielona Gora Inst Control & Computat Engn PL-65246 Zielona Gora Poland

ISBN: (纸本)9781479950812

this paper deals with the application of state space neural network model to design a model predictive control for a laboratory stand of the Two Rotor Aero-dynamical system. the work describes approach based on the so-called instantaneous linearisation of the already trained nonlinear state space model of the system. With obtained linear model it is possible to derive a vector of future controls based on the minimisation of the cost function within one optimisation window. Repeating procedure in each step of simulation and applying the obtained change of the control signal allows for efficiently control of the nonlinear systems in case of faults. All data used in experiments is obtain from the real-time laboratory stand which is working in Matlab/Simulink RTW environment.

关键词： aerodynamics aerospace control fault tolerant control neurocontrollers nonlinear control systems predictive control rotors (mechanical) state-space methods Matlab-Simulink RTW environment control signal cost function minimisation fault accommodation instantaneous linearisation linear model model predictive control nonlinear state space model nonlinear systems optimisation window state space neural networks two rotor aero-dynamical system Aerospace electronics Computational modeling Mathematical model Predictive control Real-time systems Rotors Vectors Predictive control State space models avionics spacecraft control State-space methods Neurocontrollers fault-tolerant control Nonlinear control systems linear models Nonlinear systems Rotors real-time systems Aerodynamics Computational modeling state space

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Direct Adaptive Control Based on LS-SVM Inverse Model For Nonlinear Systems 19

Direct Adaptive Control Based on LS-SVM Inverse Model For No...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Mahmoud, Tarek A. Elshenawy, Lamiaa M. Menoufia Univ Fac Elect Engn Ind Elect & Control Engn Dept Menoufia Egypt

ISBN: (纸本)9781479950812

this article proposes an inverse model control scheme for unknown nonlinear systems. the proposed scheme structures the inverse dynamics of the controlled system offline. this is done using a least squares support vector machine (LS-SVM) network that based on the Fuzzy C-Means (FCM) clustering technique. then the proposed network is updated online to determine the appropriate control action. A linear feedback compensator is added to ensure the closed loop stability. Simulation results of a continuous stirred tank reactor (CSTR) demonstrate the efficiency of the proposed approach.

关键词： adaptive control fuzzy set theory least squares approximations nonlinear control systems support vector machines CSTR FCM clustering technique LS-SVM inverse model continuous stirred tank reactor control action direct adaptive control fuzzy c-means clustering technique inverse model control scheme least square support vector machines nonlinear systems Adaptation models Chemical reactors Computational modeling Mathematical model Process control Support vector machines Trajectory adaptive control Support Vector Network Continuously stirred tank reactors Nonlinear systems control action least squares approximations Nonlinear control systems Chemical reactors Fuzzy Set theory Computational modeling Process control trajectory Mathematical Model Adaptation models Inverse method

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Finite Volume and Finite Element models for Real-Time Control and State Estimation of Two-Dimensional Heat Transfer Processes 19

Finite Volume and Finite Element Models for Real-Time Contro...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Rauh, Andreas Senkel, Luise Aschemann, Harald Univ Rostock Chair Mechatron D-18059 Rostock Germany

ISBN: (纸本)9781479950812

Control design for distributed parameter systems usually makes use of either finite volume or finite element approximations of the governing partial differential equations (PDEs). the aim of using both finite volume and finite element models is to obtain a finite-dimensional state-space representation of the dynamics which can be used directly for the design of feedback or feedforward controllers as well as state observers. However, finite volume models only provide a coarse description of flow and storage variables since these are assumed to be piecewise homogeneous in the corresponding volume elements. In contrast, finite element models exploit parameterizable ansatz functions such as polynomials for each element so that smooth representations of the before-mentioned quantities become possible. However, classical finite element techniques do not provide reliable measures for the quantification of the achievable approximation quality. this drawback is removed by the method of integrodifferential relations (MIDR). Simulations and experiments for the observer-based control of a spatially two-dimensional heat transfer process with distributed control inputs are presented in this paper to visualize differences between finite element models relying on the MIDR and finite volume representations.

关键词： control system synthesis distributed parameter systems feedback feedforward finite element analysis finite volume methods heat transfer integro-differential equations observers partial differential equations state-space methods MIDR PDE control design control estimation distributed control inputs feedback controller feedforward controller finite element model finite volume model finite-dimensional state-space representation flow variables integrodifferential relations observer-based control parameterizable ansatz functions state estimation state observers storage variables two-dimensional heat transfer process Approximation methods Eigenvalues and eigenfunctions Finite element analysis Heat transfer Heating Polynomials Vectors

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Nonlinear Voltage Control for Motion State Detection in Solenoid Valves: A Lyapunov Approach 19

Nonlinear Voltage Control for Motion State Detection in Sole...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Schwab, Manuel Braun, Tristan Straussberger, Florian Reuter, Johannes Univ Appl Sci Konstanz Inst Syst Dynam Constance Germany

ISBN: (纸本)9781479950812

In this paper, a control strategy that enables a reliable dip detection for solenoid valves is presented. For this purpose, the power electronics components are temporarily switched into a linear mode, using a power MOSFET as a voltage controlled resistor. the voltage is stabilized via a nonlinear controller that has been designed using Lyapunov's direct method. the stability region is determined and theoretical investigations are conducted in order to find appropriate controller parameters. the usefulness of the method is demonstrated by several experiments deploying an FPGA based hardware platform.

关键词： Lyapunov methods control system synthesis field programmable gate arrays motion control nonlinear control systems power MOSFET solenoids valves voltage control FPGA based hardware platform Lyapunov approach Lyapunov direct method dip detection field programmable gate array metal oxide semiconductor field effect transistor motion state detection nonlinear controller design nonlinear voltage control power electronics components solenoid valves stability region voltage controlled resistor voltage stability Asymptotic stability MOSFET Resistors Solenoids Stability analysis Valves Voltage control Field programmable gate arrays Power MESFETs Voltage regulation Solenoids solenoid valves metal-oxide-semiconductor field effect transistors VALVE GATE stability region control system synthesis Nonlinear control systems Lyapunov methods Resistor Device Component Voltage stability EMOSFET Motor Control

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Spatio-temporal responses of a class of 2 x 2 hyperbolic systems 19

Spatio-temporal responses of a class of 2 x 2 hyperbolic sys...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Bartecki, Krzysztof Opole Univ Technol Inst Control & Comp Engn PL-45272 Opole Poland

ISBN: (纸本)9781479950812

Results of the spatio-temporal analysis of a class of distributed parameter systems described by hyperbolic partial differential equations defined on a one-dimensional spatial domain are presented. For the case of the two boundary inputs of Dirichlet type applied at the same point of the spatial domain, the analytical expressions for the impulse response functions are derived based on the inverse Laplace transform of individual elements of the 2 x 2 transfer function matrix. the considerations are illustrated with a practical example of a coaxial heat exchanger operating in parallel-flow mode which correspond to the analyzed boundary conditions.

关键词： Laplace transforms control system analysis distributed control hyperbolic equations matrix algebra partial differential equations Dirichlet type boundary inputs boundary conditions coaxial heat exchanger distributed parameter systems hyperbolic partial differential equations hyperbolic systems inverse Laplace transform one-dimensional spatial domain parallel-flow mode spatio-temporal analysis spatio-temporal response transfer function matrix Boundary conditions Equations Laplace equations Resistance heating Transfer functions Transmission line matrix methods transmission line matrix methods inverse Laplace transform hyperbolic systems Distributed parameter systems Boundary conditions Resistance heating Laplace's equation Laplace transform Control system analysis TRANSFER FUNCTIONS hyperbolic equations Differential equations matrix algebra decentralised control Spatio-Temporal Analysis

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Fostering Functional Safety of Real-time Systems with Concepts of Object Orientation 19

Fostering Functional Safety of Real-time Systems with Concep...

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19th international conference on methods and models in automation and robotics (MMAR)

作者： Houben, Christina K. Fernuniv Chair Comp Engn Hagen Germany

ISBN: (纸本)9781479950812

Hard-wired control systems are increasingly replaced by program-controlled embedded systems. the programming languages currently employed for their implementation lack constructs and design patterns enforcing intelligible code fostering its verification by certification authorities. Recommendations for such constructs necessary to guarantee safety integrity are given in the international standard IEC 61508-3. One of the recommendations refers to object-oriented programming (OOP). therefore, we analyse both basic and advanced properties of OOP like encapsulation, polymorphism, inheritance, prototyping, delegation etc. with respect to functional safety. In a resulting programming language based on PEARL90 [1] we demonstrate coding with examples from hard real-time systems.

关键词： IEC standards control engineering computing embedded systems object-oriented programming program verification safety-critical software OOP PEARL90 certification authorities design patterns functional safety hard real-time systems hard-wired control systems intelligible code international standard IEC 61508-3 object orientation program-controlled embedded systems programming languages safety integrity verification Computer languages Concrete Prototypes Real-time systems Runtime Safety Software object oriented programming Computer Programming Languages object orientation real-time systems hard real-time system design pattern control engineering computing IEC publications safety-critical software program verification Runtime Embedded systems Consumer safety safety PROTOTYPE

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