Showing papers in "IFAC Proceedings Volumes in 1973"

TL;DR: In this paper, the concept of connective stability of large-scale systems is widened to include arbitrary structural perturbations, and conditions for this broader kind of stability are derived by developing connective versions of both the linear and the nonlinear comparison principle.

TL;DR: The accepted model for regulation of salt and water in frogs and other aquatic vertebrates has been modified for frogs to accord with results of measurements of fluxes of sodium ion and water using methods in which the effects of measuring procedures on normal function of control mechanisms is minimized.

TL;DR: A simple recursive discrete algorithm is derived which allows combined proportional and integral adaptation of two gain matrices working on the input and the state vectors of the process.

TL;DR: The design procedure is quite transparent, providing the designer with the insight to make necessary trade-offs, at every step in the design process, based on frequency response concepts.

TL;DR: A unified approach to the design of "parallel" and "series" discrete model reference adaptive systems (MRAS) is discussed using the representation of these systems as an equivalent feedback system partitionned into a linear time invariant part and a nonlinear time varying part.

TL;DR: The design and the implementation of the adaptation mechanism based on the use of a hyperstable adaptation algorithm for multivariable adaptive model following control systems with a fixed structure are discussed.

TL;DR: This model represents the first step in the system analysis of the glucoregulatory system based on insulin-glucagon interaction, a focal hormonal interplay in the acute regulation of glucose homeostasis.

TL;DR: Some preliminary results are related with a small computer system which achieves control of blood sugar by simulating the insulin secretion pattern of the pancreas by means of programs simulating a one compartment and a two compartment insulin response in a surgically diabetic dog.

TL;DR: An extension of this method to adaptive filtering is proposed and an application to very high noise-signal ratio measurements is given.

TL;DR: In this article, a general philosophy for evaluating worst case design is proposed, applied to the linear quadratic problem, which requires some assumptions on the energy available to Nature, and the sensivity of the results to that arbitrary parameter is obtained, thus providing a complete tool for the evaluation of the two design techniques: stochastic optimal control, vs worst case control.

TL;DR: In this article, Kalman theory is used to derive optimal estimates from measurements contaminated by measurement errors, and the estimates are used in the control and the control law derived minimizes a quadratic performance index.

TL;DR: In this article, two methods of adaptation of the autopilot's parameters are compared with the Liapunov approach and the sensitivity model approach, and the results are tested in practice on this ship.

TL;DR: The “state of the art” of model reference adaptive systems based on the literature published since 1964 is presented and those that appear feasible in the near future are surveyed.

TL;DR: It is concluded that the neurogenic proportional controller hypothesis, combined with the metabolic control factors, can simulate submaximal exercise responses.

TL;DR: In this paper, a dynamic economic model which is stable and is consistent with previous models in the static case has been previously developed, which includes factors such as employment sectors, social stratification, social mobility, industrial labor demands.

TL;DR: The problem is reduced to the control of the model whose output is affected by an input dependent error constrained in norm, and a min-max approach is taken, which is the solution of a set of a partial differential equation.

TL;DR: In this paper, a deterministic design procedure for controlling a class of linear plants operating in an unknown environment is presented, in which use is made of the concept of the "two-level" controller.

TL;DR: In this paper, a mathematical model of glass tank furnaces is formulated under the assumption of two-dimensional and steady-state condition in the central longitudinal cross-section of the tank.

TL;DR: A model is described depicting the spatial arrangement of the receptors within the carotid sinus wall and their roles in the baroceptor process to provide a logical frameworĸ for the experimental results.

TL;DR: In the wing membranes of several species of bats, the terminal elements are composed of large sacculated structures that may form extended interdigitating chains as discussed by the authors, and the sacks wall contract rhythmically when conditions of lymph formation exist.

TL;DR: In this article, sufficient conditions for the existence of a controller such that the control system is asymptotically stable and steady-state output-invariant with respect to disturbances are given.

TL;DR: In this article, a guide to performance capabilities of commercially available thermometers, and instrument specification and application problems are discussed for four groups of measurements, namely, the measurement of glass surface temperatures, glass bulk temperatures, general furnace temperatures and metal mold temperatures.

TL;DR: In this paper, a dynamic mathematical model of a glass melting and conditioning system has been developed based on the conservation of energy and mass, focusing on the dynamic interactions between the gas, batch, glass, and refractory temperatures and glass flow rates in the tank, refiner and forehearth.