Showing papers in "IFAC Proceedings Volumes in 1977"

TL;DR: In this paper, an identification procedure of non-linear autoregressive type model is proposed, where the selection of linear and nonlinear terms of the model is realized by using Akaike's Information Criterion (AIC).

TL;DR: A new method of digital process control that relies on three principles, which has been continuously and successfully applied to a dozen large scale industrial processes for more than a year's time, to compute in a hierarchical way the set points of the dynamic control.

TL;DR: An autopilot for ships designed with the aid of fuzzy sets is investigated, and a comparison is made between the fuzzy and a conventional PID controller which is most commonly used in autopilots.

TL;DR: In this paper, the authors proposed a versatile robot hand such that the handling force and the rigidity of the prehension system are adjustable with fingers control, where the hand has three fingers which are driven by three individual motors through coil springs.

TL;DR: For manipulators and industrial robots a neu nonlinear control concept is presented which achieves complete decoupling of the dynamic interactions in the system and arbitrary pole assignment.

TL;DR: A novel method for the automatic calibration of a force sensing system that has several advantages over present methods and has been implemented on the Stanford Arm system.

TL;DR: In this article, two new techniques are put forward in order to get Liaptu1ov's criterion work very fast, namely, rapid computation of the stability boundary and determination of the initial conditions required to compute the V value at different fault clearing times.

TL;DR: In this article, the authors consider the issues and problems associated with Flexible Manufacturing System (FMS) and the information/algorithms that are necessary for their control and efficient operation.

TL;DR: In this article, centre manifold theory is applied to the problem of flow-induced oscillations in which bifurcations occur under the action of control parameters, where the governing nonlinear PDE can be replaced locally by a vector field on a low dimensional manifold.

TL;DR: An algebraic model for human interaction via information transmission that gives a possible interpretation of usual psychotherapeutic practices such as the ’silence’ and the ‘use of paradoxes’ is presented and discussed.

TL;DR: The paper compares two methods of recursive parameter estimation, methods of process offset elimination and large disturbance transient removal, and the effect of sampling intervals with particular reference to processes with long response times.

TL;DR: This paper will show how stability problems can be easily overcome in the method of field orientation for the control of induction machines using the vector of magnetic flux.

TL;DR: Directed graphs are used in an essential way to describe various structural properties of dynamic systems such as input reachability, output reachability and connective stability.

TL;DR: In this article, the limits of stability of a variable-speed drive for an asynchronous machine fed by a controlled current-source inverter are investigated and confirmed by experiment. And the stable range can be divided into three modes of commutation, which are single-, double-and multiple commutation.

TL;DR: In the absence of multiple closed loops, the interaction is treated as disturbance functions and can be compensated by feed-forward control as discussed by the authors, where partial nonlinear decoupling has been found to be effective, without risk of destabilization.

TL;DR: In this paper, a method for system identification of a discrete linear constant multivariable system, which has unknown system matrices, output structure and noise covariance, is presented.

TL;DR: In this article, a fast and numerically advantageous algorithm for solving minimal design problems (MDP) and a new, simpler test for the existence of a proper solution of the MDP are presented.

TL;DR: In this paper, an appraisal of past, present, and future applications of the general theory of multivariable control to the problem of spacecraft attitude control is made, and the primary obstacle to successful application is seen to be the reliance of the theory on the fidelity of the model, which is peculiarly complex for modern spacecraft.

TL;DR: In this paper, the optimal low-order dynamic output feedback compensators for linear discrete-time constant systems were studied, where the dynamic order of the compensator can be chosen arbitrarily in advance, and its parameters are determined in order that a quadratic performance index is minimized.

TL;DR: The richness of the input signal permitting the unique realization of linear discrete multivariable dynamic systems is studied and a theorem specifying sufficient conditions for input signal richness is formulated.

TL;DR: In this article, the voltage source inverters ensuring the minimization of additional coil losses in the induction motor were considered under non-modified control, and the results were only valid if the skin effect in the motors is neglected.

TL;DR: In this article, a model of a 500MW unit of the Electricity Commission of N.S.W. at their Liddell Power Station at various sampling rates (6, 12, 30 secs).

TL;DR: In this article, a recursive algorithm is proposed for the identification of linear multivariable systems using a generalized least-squares approach, which minimizes the number of parameters to be estimated.

TL;DR: In this paper, a digital simulation procedure for circuits containing semiconductor devices (diodes, thyristors) is described, and a Boolean functional representation of thyristor and diodes is introduced and the state variable representation is utilized to obtain the circuit model.

TL;DR: The servoing method frees us from the physical manipulator mechanism and enables us to control the manipulator in any task-oriented coordinate system and reduces the complexity of description of manipulations, especially in the case where motion is partially constrained.

TL;DR: In this article, a conceptual approach to the overall process of technological change provides a basis for the development of an Integrated Model of Technological Change (IMTC), which aggregates to a Technology State Vector whose dynamics are instructive.

TL;DR: The interpretive programming language is based on module theory and convolution algebra and provides a conceptual framework for unifying simulation and multivariable control theory and demonstrates how easily the procedure may be used to apply modern control concepts to practical problems.

TL;DR: In this article, the pH process is modelled applying elementary theory of dissociation of the dissolved constituents, such conversions of the measured pH signal are described which permit a theoretically correct application of linear control.