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Blast Furnace process control at Ovako-Koverhar

IFAC Proceedings Volumes 1983年第15期16卷 387-392页

作者： I. Pesonen E. Saarelainen Product Manager Outokumpu Oy Engineering Division Espoo Finland Manager Automation and Process Control Ovako Engineering Imatra Finland

The process control methods of the blast furnace at Koverhar have been developed stepwise over the last ten years. The first step included improvements of such subsystems as burden compositions-, tuyere level-, burden distribution-, and tapping control. The second step aimed at long term control of the whole blast furnace based on computer models, which were used to analyze the process state. The gains in fuel rate and productivity which were achieved by these methods are shown in Fig.l and later discussed by means of the *** experience obtained during this work has been used in the third step, which consists of a user-oriented interactive process supervising system. The paper describes the third step, the implementation of the supervising system, its structure and the operational results achieved.

关键词： Blast furnace energy control hierarchical systems models sensors

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Comparison of controller design methods for a scaled metro vehicle - flexible structure experiment

Comparison of controller design methods for a scaled metro v...

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American control Conference (ACC)

作者： Christian Benatzky Martin Kozek Hanns Peter Jorgl Institute of Mechanics and Mechatronics Division of Control and Process Automation University of Technology Vienna Vienna Austria

This paper addresses the design and implementation of different controllers on a 1/10 scaled flexible structure experiment of a metro vehicle car body. The particular controller design methods investigated are state vector feedback control combined with a Kalman-filter and the μ -synthesis procedure. Using experimental data it is shown, that with both design methods the structural response to disturbances can be reduced. Nevertheless, because of the fact that the μ -synthesis takes into account the uncertainty associated with the model of the structure as well as the fact that the performance variables to be controlled are not identical to the measurements a better performance is achieved in comparison to the state feedback controller. At the same time the control costs are considerably lower when the μ -synthesis controller is utilized.

关键词： Design methodology Vehicles Flexible structures Frequency Laboratories Damping Mechatronics Robust control Cities and towns process control

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Modeling and control of an Industrial Continuous Furnace

Modeling and Control of an Industrial Continuous Furnace

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International Conference on Computational Intelligence, Modelling and Simulation (CSSIM)

作者： Lukas Bitschnau Martin Kozek Institute for Mechanics and Mechatronics Division of Control and Process Automation University of Technology Vienna Vienna Austria

This paper describes a furnace model in state space formulation for a continuous heat treating process specifically suitable for controller design. The model comprises the heat transfer in the conveyed steel strip, the heat transmission from the heating or cooling elements to the steel strip, the inner dynamics of the heating elements and the related furnace portion, heat losses to the ambience, and time-varying parameters of both the strip material and the process (strip velocity, set temperature profile). Model inputs are the heating powers of the individual heaters, and the outputs are either strip or furnace temperatures at specific furnace positions. The model is also suitable for on-line simulation, and due to the flexible and versatile structure of the heater model a wide range of furnace types can be covered with high accuracy. Simulation results for classical PID zone temperature control and a proposed feed forward extension demonstrate the efficiency of the furnace model.

关键词： Industrial control Furnaces Heat transfer Strips Temperature control Steel State-space methods Space heating Cooling Propagation losses

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LQ-based design of the inner loop lateral control for a large flexible BWB-type aircraft

LQ-based design of the inner loop lateral control for a larg...

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IEEE Conference on control Technology and Applications (CCTA)

作者： A. Schirrer C. Westermayer M. Hemedi M. Kozek Institute of Mechanics and Mechatronics Division of Control and Process Automation University of Technology Vienna Vienna Austria

Two LQ-based MIMO controllers (LQG and LQI architectures) for lateral inner loop flight control for a large BlendedWing Body (BWB) passenger aircraft pre-design model are presented. The main control goals are Dutch roll mode damping, coordinated turn, and roll response shaping. An open loop analysis shows that traditional SISO design faces fundamental limitations, so both controller variants are designed as MIMO controllers. Their performance is tuned and evaluated, and their specific properties are discussed and compared. The controllers are validated on various fuel and payload mass cases and fulfill all demanded goals. Ongoing and future research seeks to reduce structural loads and increase passenger comfort using robust control design methods.

关键词： control design Aircraft Aerospace control Aerodynamics Atmospheric modeling MIMO Damping

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A comprehensive robust control design and optimization methodology for complex flexible-structure systems

A comprehensive robust control design and optimization metho...

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Mediterranean Conference on control and automation (MED)

作者： Alexander Schirrer Christian Westermayer Mark Hemedi Martin Kozek Division of Control and Process Automation Institute of Mechanics and Mechatronics University of Technology Vienna Vienna Austria

Robust control design for complex flexible structures involves many consecutive essential steps. Additionally, many design parameters arise, which turn design optimization into a cumbersome and difficult task. This paper presents a comprehensive robust ℋ ∞ -optimal control design methodology for this class of systems. It relies on a pragmatic approach: The control engineer produces an initial design and reuses it in subsequent design iterations and parameter optimization. The methodology is illustrated by a large transport aircraft model and shows high potential to obtain and tune robust high-performance controllers. Expert knowledge and design decisions are introduced in a natural, clearly structured way, while control engineers are relieved from repetitive design tasks which are safely automated.

关键词： Uncertainty Optimization Robustness Robust control control design Aircraft Atmospheric modeling

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Modeling of Lateral Dynamics for an Endless Steel Belt

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AIP Conference Proceedings 2010年第1期1233卷 1541-1546页

作者： Klemens G. Schulmeister Martin Kozek aInstitute for Mechanics and Mechatronics Division of Control and Process Automation Vienna University of Technology Wiedner Hauptstrasse 8‐10 1040 Vienna Austria

In this paper a grey‐box model for the lateral dynamics of an endless steel process belt is presented. Due to their high elastic modulus steel belts are operated on cylindrical return drums which do not provide for passive lateral positioning. Therefore, active control inputs like swiveling of the return drums have to be employed. The model is of sixth order, has a linear state space structure, and is computationally inexpensive. Inputs are the horizontal swivel angles of the drums, a lateral disturbance force and a disturbance moment, outputs are the lateral positions at the return drums. It is convenient for both off‐line and on‐line simulations and perfectly suited for control design. The model is parameterized by a few simple geometric dimensions, the elastic modulus of the strip material, and an adjustable transport delay. Validation results from a scaled experimental belt machine prove the excellent accuracy of the new model.

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Cooperative and Hierarchical Fuzzy MPC for Building Heating control

Cooperative and Hierarchical Fuzzy MPC for Building Heating ...

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IEEE International Conference on Fuzzy Systems

作者： B. Mayer M. Killian M. Kozek FH JOANNEUM Institute of Mechanics and Mechatronics Division of Control and Process-Automation Vienna University of Technology

ISBN: (纸本)9781479920747

A combined cooperative and hierarchical control structure utilizing Fuzzy Model Predictive control (FMPC) for building heating is introduced. The structure comprises three types of Model Predictive controllers (MPC): For different independent zones of the building FMPCs optimize the fast acting input variable fan coils (FC) while a global linear MPC optimizes the slowly acting thermally activated building systems (TABS). Cooperation between these two groups of controllers is guaranteed by an inter-sample iteration. This cooperative structure acts as master in a hierarchical structure, where the slave is a mixed-inter MPC (MI-MPC) in the supply level. While the cooperative structure ensures user comfort in the building, the MI-MPC optimizes monetary costs of heat supply. This structure allows for decoupled and independent modeling of FMPCs, simple incorporation of the coupling input TABS, and decoupled design of the supply level control. A discussion on stability and sub-optimality of the control structure is given. A simulation of a large office building incorporating disturbances of ambient temperature, radiance, and occupancy demonstrates the performance of the proposed concept.

关键词： Fuzzy MPC TS-fuzzy system modelling Building climate control Cooperative MPC Hierachical MPC

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DYNAMIC MODELLING OF A STEAM REFORMER AND IMPLEMENTATION OF FEEDFORWARD/FEEDBACK control

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MEASUREMENT AND control 1970年第5期3卷 T65-+页

作者： GODFREY, KR SHACKCLOTH, B Control Engineering Division Warren Spring Laboratory Ministry of Technology Stevenage Herts AEI—Elliott Process Automation Borehamwood Herts

A simplified theoretical model for the dynamics of a side-fired steam reformer is derived. Experimental work, designed to confirm the theoretical model, is described, and the use of the results in the design of a feed-forward/feedback control scheme for throughput changes is discussed. This scheme, implemented on an on-line computer, enables large throughput changes to be made with a minimum of disturbance to the plant and a minimum of effort by the plant operators. Results from a typical throughput change are presented.

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The Tinyphoon's control concept

The Tinyphoon's control concept

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2006 IEEE International Conference on Mechatronics, ICM

作者： Novak, Gregor Roesenert, Charlotte Bader, Markus Deutsch, Tobias Jakubek, Stefan Krywult, Stefan Seyr, Martin Institute of Computer Technology Vienna University of Technology Vienna Austria Department of System Design Faculty of Science and Technology Keio University Yokohama Japan Division of Control and Process Automation Institute for Mechanic and Mechatronic Vienna University of Technology Vienna Austria

ISBN: (纸本)0780397134

control concepts for mobile service robots are a key issue in robotic research. With the use of mobile robots in the domestic area, further challenges entails new designs facilitating efficient control concepts for fast motion with reduced computational capacity. This paper presents motion control designed for an autonomously acting two-wheel driven robot, which fits in a cuboid with 75x75x150mm. Due to the outstanding design of mechanical and electrical components, the robot is capable to perform high precision movements up to a speed of 2.5m/s, featuring a vision unit that allows a fast environment recognition interpreting current position based on an application dependent world model. Based on predictive control algorithms, trajectory tracking and point stabilization are facilitated. The use of real-time communication for all units allows fast interaction of all components exchanging information, which is indispensable for fast motion control. © 2006 IEEE.

关键词： control theory

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Fault Detection and Correction in Omni Bundle Robot Using EKF

Fault Detection and Correction in Omni Bundle Robot Using EK...

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International Conference on Manufacturing, Advanced Computing, Renewable Energy and Communication, MARC 2018

作者： Rana, Rohit Agarwal, Vijyant Gaur, Prerna Parthasarathy, Harish Instrumentation and Control Engineering Division Netaji Subhas Institute of Technology Sec-03 Dwarka110078 India Manufacturing Process and Automation Engineering Division Netaji Subhas Institute of Technology Sec-03 Dwarka110078 India Electronics and Communication Engineering Division Netaji Subhas Institute of Technology Sec-03 Dwarka110078 India

ISBN: (纸本)9789811367717

In this paper, the entire focus is on fault detection and correction using extended Kalman filter (EKF) on industrially used omni bundle robot. Here, the authors considered a problem where a robot does monotonous job and repetitively traverse the same trajectory every time. Due to wear and tear or any fluctuation in input signals, the robot may not track the desired trajectory. Faults may arise at various levels in robots, for example, in actuator, encoder, and dynamical parameters. Actuator fault detection using encoder sensor will be the main focus in this research paper. The dynamics of robotic arm link is modeled using a DC motor attached with the link, and the encoder attached with the motor will provide position feedback. The fault is detected using EKF state estimation, and the fault is corrected using a PID controller feedback into the motor input torque. © 2019, Springer Nature Singapore Pte Ltd.

关键词： Extended Kalman filters

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