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Creation Aided design of the control system of a Nuclear Steelmaking Process

IFAC Proceedings Volumes 1979年第7期12卷 535-540页

作者： K. Tsuruoka T. Miyasugi H. Miyamoto T. Ohkawa K. Furuta Engineering Research Association of Nuclear Steelmaking Time-Life Building 2-3-6 Ohtemachi Chiyodaku Tokyo Japan Department of Control Engineering Tokyo Institute of Technology Oh-okayama Meguroku Tokyo Japan

This paper describes a research work which is currently in progress on the control system design of the nuclear steelmaking process now under research and development in Japan. The computer aided design program package, based on the state-space approarch, has been developed. The nonlinear mathematical models of the subsystems have been built by physicochemical principles, and they are linearized by another program package. The validity of the design procedure is illustrated by an example of the control system of the primary helium loop which is one of the subsystems of the *** performance of the control system is tested by nonlinear dynamic simulations.

关键词： Computer-aided design Linearization techniques multivariable control system Nuclear plants Process control State-space method

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Flatness control system for Hot Strip Mills

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IFAC Proceedings Volumes 1981年第2期14卷 2483-2488页

作者： N. Kitao Y. Hirose K. Hamada System Planning and Computer Processing Department Kawasaki Steel Corporation Mizushima Kawasaki-dori Kurashiki City Okayama Japan Sheet and Strip Rolling Department Kawasaki Steel Corporation Mizushima Kawasaki-dori Kurashiki City Okayama Japan

Flatness control system with a water jet type flatness sensor has been developed for the practical use in a hot strip mill. This system consists of setup control and automatic flatness control. In setup control, adaptive Modification of mathematical models is made by signals from flatness sensor and crown meter. Automatic flatness control has two functions: feedback control with P-I action and feedforward control with process model to predict flatness variation in the coil. The control system is put into the existing control complex of hot strip mill and begin to operate synthetically with gauge control, crown control, temperature control, and so on.

关键词： Signal processing Digital computer applications Adaptive systems Feedforward multivariable control system Minicomputers Metallurgical industries Rolling Mills

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Intelligent control of a Multiactuator system

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IFAC Proceedings Volumes 1982年第8期15卷 71-80页

作者： A. Meystel Department of Electrical Engineering University of Florida Gainesville Florida USA

The structure of an Intelligent Multiactuator system (IMS) is discussed which is determined as a system with redundancies, where the choice between concurring alternatives appears at a definite stage as a regular procedure of system operation. The structure of the IMS is considered as a product of four hierarchies: targets, memories, propensities, and impacts. The optimum behavior is determined by anthropomorphic heuristics at the levels of planning and navigation. The optimum control of subsystems is computed at the lowest level of intelligence. The structures of optimum control are recommended which imply the online performance only for a limited amount of procedures.

关键词： Intelligent control actuators multivariable control system fuzzy automata planning brain models hierarchical system heuristic programming navigation optimal control decoupling real-time operation

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A Novel Decentralized control of Large Scale Power system Based on the Disturbance Observer

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IFAC Proceedings Volumes 1989年第10期22卷 403-408页

作者： Y. Hori Y. Tsuda Y. Kaya Department of Electrical Engineering Faculty of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo 113 Tokyo Japan

A novel decentralized control method of a Large scale power system is proposed. The whole system has been divided into some generator sub-systems. The interferences on the sub-system are treated as unknown disturbances. Any sub-system can be decoupled from the other ones by means of the fast feedforward compensation based on the estimated disturbances obtained by the disturbance observer. This compensation allows us to design the small-scale decentralized controller. This design method has the advantage that the controller is invariant even when the external power system's structure changes. Finally, the effectiveness of the proposed method is confirmed by numerical simulations.

关键词： Large-scale-systems Observers Power system control Decoupling Feedforward multivariable control system Optimal control Servomechanism

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NEW AND EXISTING TECHNIQUES FOR DYNAMIC LOADS ANALYSES OF FLEXIBLE AIRPLANES

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JOURNAL OF AIRCRAFT 1986年第4期23卷 340-347页

作者： POTOTZKY, AS PRC—Kentron Inc. Hampton Virginia NASA Langley Research Center Hampton Virginia

This paper reviews existing techniques for calculating dynamic loads for flexible airplanes and presents a new technique. The new technique involves the summation-of-forces method of writing dynamic loads equations. Until now, this form of the dynamic loads equations has been formulated in the frequency domain. The new technique uses s-plane approximation methods (previously applied only to the equations of motion) to transform the dynamic loads equations from a second-order frequency domain formulation with frequency-dependent coefficients into a linear-time-invariant state-space formulation. Several numerical examples demonstrate the usefulness of the new technique and the high quality of the results. In addition, a convergence investigation establishes that the summation-of-forces method converges more quickly (that is, with fewer modes) than does the mode displacement method.

关键词： Aeroplane Frequency Response Functions Aerodynamic Force Coefficients State Space Representation Bending Moment Wing Root Stiffness Matrices multivariable control system Computer Programs High Aspect Ratio

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ROBUST NON-MINIMUM-PHASE COMPENSATION FOR A CLASS OF UNCERTAIN DYNAMIC-systemS

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JOURNAL OF GUIDANCE control AND DYNAMICS 1991年第6期14卷 1191-1199页

作者： BYUN, KW BONG, W SUNKEL, J ARIZONA STATE UNIV DEPT MECH & AEROSP ENGNTEMPEAZ 85287 NASA LYNDON B JOHNSON SPACE CTRHOUSTONTX 77058

This paper presents robust control synthesis techniques for uncertain dynamical systems subject to structured parameter perturbation. Both classical and H infinity control synthesis techniques are investigated. Most H infinity-related control techniques are not directly concerned with the structured parameter perturbation. In this paper, however, a new way of incorporating the parameter uncertainty in the robust H infinity control design is explored. A generic model of uncertain dynamical systems is used to illustrate the design methodologies developed in this paper. It is shown that, for a certain class of noncollocated structural control problems, use of either technique results in non-minimum-phase compensation.

关键词： Closed Loop Transfer Function Frequency Domain Linear Quadratic Gaussian Feedback control system Single Input Single Output Riccati Equations Mass Spring system multivariable control system Active Vibration control Sensitivity Analysis

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DECOUPLING OF HIGH-GAIN multivariable TRACKING-systemS

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JOURNAL OF GUIDANCE control AND DYNAMICS 1985年第1期8卷 44-49页

作者： RIDGELY, DB BANDA, SS DAZZO, JJ USAF INST TECHNOL DEPT ELECT ENGN WRIGHT PATTERSON AFB OH 45433 USA

The problem of achieving a control system design that produces the tracking of command inputs and the decoupling of outputs of high-gain multivariable control systems is considered. The tracking requirements and the conditions under which the decoupling of outputs is possible are given. A procedure for selecting the design parameters is described. A new synthesis procedure for decoupling is described. The procedure is illustrated through numerical examples for several fighter aircraft performing a number of maneuvers.

关键词： Multiple Input, Multiple Output Fighter Aircraft multivariable control system Closed Loop Transfer Function Yaw Output Feedback Computing Aerospace Sciences Aerospace Engineering Sideslip Angle

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Simultaneous Robust, Decoupled Output Feedback control for Multivariate Industrial systems

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IEEE ACCESS 2018年 6卷 6777-6782页

作者： Li, Pengwei Yang, Xu Shardt, Yuri A. W. Univ Sci & Technol Beijing Sch Automat & Elect Engn Minist Educ Key Lab Knowledge Automat Ind Proc Beijing 100083 Peoples R China Beihua Univ Coll Elect & Informat Engn Jilin 132013 Jilin Peoples R China Univ Waterloo Dept Chem Engn Waterloo ON N2L 3G1 Canada

This paper proposes a simultaneous robust decoupled output feedback control approach for multivariate industrial processes with parameter uncertainties. Based on the desired control performance indicators, the expected transfer function of the closed-loop multivariate system is configured as a nonsingular diagonal matrix. Using coprime factorization theory, the weighting functions are selected and the parameterization matrix and controller are designed and calculated to achieve simultaneous robust decoupled control that takes into consideration parameter uncertainties. The performance and effectiveness of the proposed approach is demonstrated using a case study based on the crown-thickness control system of the hot strip mill processes.

关键词： multivariable control system robust control system decoupling industrial processes

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DISTURBANCE ATTENUATION BY A FREQUENCY-SHAPED LINEAR-QUADRATIC-REGULATOR METHOD

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JOURNAL OF GUIDANCE control AND DYNAMICS 1986年第4期9卷 397-402页

作者： IMAI, H ABE, N KOBAYAKAWA, M MITSUBISHI HEAVY IND CO LTD NAGOYAJAPAN KYOTO UNIV KYOTO 606JAPAN

A linear-quardratic-regulator method for frequency-dependent weighting matrices is applied to the design of a feedback control system such that a specified level of disturbance attenuation can be achieved while the stability of the system is ensured. Some inequalities relating the frequency-dependent weighting matrices to the return-difference matrix of the system are derived. They provide a straightforward design method for the return-difference matrix or, equivalently, the disturbance attenuation property. The result is applied to the design of an aircraft gust-alleviation system.

关键词： Linear Quadratic Regulator Feedback control system Power Spectral Density Riccati Equations Autopilot Ailerons multivariable control system Aircraft Flying Qualities Aircraft Stability

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Eigenvalue assignment by minimal state-feedback gain in LTI multivariable systems

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INTERNATIONAL JOURNAL OF control 2011年第12期84卷 1956-1964页

作者： Ataei, Mohammad Enshaee, Ali Univ Isfahan Fac Engn Dept Elect Engn Esfahan Iran

In this article, an improved method for eigenvalue assignment via state feedback in the linear time-invariant multivariable systems is proposed. This method is based on elementary similarity operations, and involves mainly utilisation of vector companion forms, and thus is very simple and easy to implement on a digital computer. In addition to the controllable systems, the proposed method can be applied for the stabilisable ones and also systems with linearly dependent inputs. Moreover, two types of state-feedback gain matrices can be achieved by this method: (1) the numerical one, which is unique, and (2) the parametric one, in which its parameters are determined in order to achieve a gain matrix with minimum Frobenius norm. The numerical examples are presented to demonstrate the advantages of the proposed method.

关键词： eigenvalue assignment matrix algebra state feedback multivariable control system

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