Showing papers in "IFAC Proceedings Volumes in 1974"

TL;DR: In this article, the algebraic structure of linear systems defined over R[λ], the ring of polynomials in λ with real coefficients, is studied and natural definitions of controllability and observability are introduced.

TL;DR: A comprehensive survey is given of recent work on the use of matrix-valued functions of a complex variable for the analysis and design of linear multivariable feedback systems.

TL;DR: In this paper, the Vektor des magnetischen Flusses als Information aus der Strecke benotigt Zur Erfassung dieser, im folgenden kurz “Feldvektor” genannten Groβe, gibt es zwei Arten von Verfahren.

TL;DR: In this paper, a dynamic linearized model and the associated equivalent circuit for a controlled current induction motor are presented and the controlled variables of interest are identified and open-loop transfer functions are tabulated.

TL;DR: In this article, the problem of parameter identification is formulated as a constrained nonlinear minimization problem and a particular computation procedure is developed to solve this problem, which can be used to obtain significant results.

TL;DR: In this article, a general approach for the design of adaptive control systems usable for electrical drives subject to rapid wide and unmeasurable variations in plant parameters is presented, based on the model reference adaptive control techniques designed using the Popov - Landau method.

TL;DR: A method of complete simulation of static converters which demands no a-priori knowledge of the functioning of the device under examination is put forward, particularly well adapted to the description of transients.

TL;DR: In this paper, the authors describe the Verwendung der Zeitintegrale von Frequenzen als Signalgroβen vorteilhaft, sie entsprechen Drehwinkeln, wird dazu einheitlich f¨r alle Maschinenarten die Lauferstellung vorgeschlagen.

TL;DR: In this paper, the authors considered the different models and methods to be found in published works by separating them into three classes: linear continuous, discrete small signal, discrete large signal, and compared their respective uses and advantages, and gave the general results which they allowed to obtain.

TL;DR: In this paper, the design of a multivariable controller for an automotive gas turbine by the use of a frequency domain design method is presented, where the turbine considered is of the two shaft variety, with a set of variable nozzles fitted upstream of the power turbine and a heat exchanger fitted in the exhaust system.

TL;DR: In this article, a design methodology for a class of multivariable feedback controllers for industrial processes is developed from the viewpoint of optimal linear regulator theory, which permits systematic design of multiivariable dynamic compensators to satisfy both transient and ultimate state performance requirements and has been applied to load-following control of fossil fueled power plants and power system load-frequency control.

TL;DR: In this article, ein Triebfahrzeug mit Asynchronmaschinen-Antrieb vorgesehene Wechselrichter wird vorzugsweise aus einem Zwischenkreis mit konstanter, moglichst glatter Gleichspannung gespeist.

TL;DR: In this paper, einphasige Stromrichterschaltung, die nahezu glatten Gleichstrom und glatte Gleichspannung liefert and dabei dem Netz angenahert sinusformigen Strom bei geringer Phasenverschiebung entnimmt, beschrieoen.

TL;DR: The design is optimum in the sense of achieving this with loop transfer elements which decrease in magnitude at the fastest possible rate vs w, important for the reduction of sensor noise effects, whose typical large amplification tends to saturate plant elements.

TL;DR: The theory of controllability for systems described by hereditary equations is considered in this article, which opens up a possibility of obtaining effective, suitable in realization criteria for investigating applied problems for multiconnected nonstationary control systems on structural schemes and experimental data.

TL;DR: In this paper, a computational algorithm is presented for the design of a compensator for 'well-posed' linear multivariable regulators, which is designed to achieve output regulation and internal loop stability in the presence of small parameter variations or uncertainties - of special type - that occur in the compensator and the plant.

TL;DR: In this paper, an automatic swing control of cranes has been reported, where feedback control of swing angle is applied together with open-loop control; this compensates the effect of variations in parameters and of such disturbances as wind force, friction force, etc.

TL;DR: In this paper, the authors describe function techniques for the analysis of nonlinear multivariable systems and the condition det G + N ˆ ≠ 0, sufficient for the absence of limit cycles.

TL;DR: In this article, the authors show how gross der statistische Einfluss auf den resultierenden Summenvektor is and konnen weiter als Basis bei Untersuchungen der Netzbelastung with Stromoberschwingungen dienen.

TL;DR: In this paper, a compensation method for control-loops including a thyristor controlled rectifier, especially in the case of D. C. supplies, is presented. But, despite small-signal models are used, the problem of asymptotic stability is considered.

TL;DR: In this paper, the authors describe the experiences which occur when one attempts to use a digital device eg. a computer, as a speed controller for a thyristor drive, which is a type of tachogenerator.

TL;DR: In this paper, the stability of bridge control systems with a proportional integral controller is investigated. But the analysis of the system is restricted to the one-quadrant and two-quadrants converters.

TL;DR: In this paper, a design approach based on a combination of two of the methods, the Inverse Nyquist Array method and the Characteristic Locus method, is applied to the design of the control scheme for the once-through boiler of a nuclear power station.

TL;DR: In this paper, a new procedure is proposed for selecting the pulse width modulated waveform of the a.c. voltage waveform, which is applied to a problem with particular constraints on the harmonic content.

TL;DR: In this paper, a nonlinear uniformly sampled data system with lead and lag type pulse width modulators is proposed for a critical second order controlled plant, where critical gains are evaluated by determining the stability boundaries.

TL;DR: In this paper, the basic principle of self-commutated inverters controlled by sinusoidal pulse-duration modulation (also known as sub-harmonic inverters) is explained and illustrated.

TL;DR: In this paper, a Loschaltung f zwangskommutierte Stromrichter wird beschrieben und mit der bekannten Troger-Schaltung verglichen.

TL;DR: In this article, the operating principle of stepless dc controllers of the chopper type is described, with application to control series dc motors in either the motoring or braking mode.

TL;DR: In this article, a new start-up method of high frequency inverters applied in the induction heating industry is discussed, where there is no need for power starting circuit and the most important phenomena taking place in the inverter during startup are analyzed.

TL;DR: In this article, the authors describe some developments in methods of using Nyquist plots to determine the stability of multivariable feedback systems, including refinements of the Inverse Nyquist Array method of Rosenbrock, and extensions to the case of nonlinear and/or time-varying feedback.