Showing papers in "IFAC Proceedings Volumes in 1981"

TL;DR: In this article, a linear feedback control is applied in high accuracy tracking of a periodic reference input by locating the imaginary poles of the controller's transfer function to suit the period of the input.

TL;DR: This paper presents a meta-modelling framework for the design of feedback algorithms implementing the experience of a human operator in the feedback loop based upon the fuzzy set theory and possibility theory.

TL;DR: In this article, the manipulatability and redundancy of multi-articulated robot arms are analyzed and utilization of redundancy is discussed, and experimental results are also presented concerning the use of redundancy for trajectory control with provisions for an obstacle.

TL;DR: Adaptive control has been extensively studied in the literature as mentioned in this paper, with particular emphasis on model reference adaptive systems and self-tuning regulators, as well as their application in a variety of applications.

TL;DR: In this paper, a dynamical model of container cranes is firstly derived by using Lagrange's equation and then the total motion of the container load is divided into five fundamental sections.

TL;DR: In this paper, the authors developed a single cycle automatic operation system incorporating anti-swing control for the cold strip mill of the Fukuyama Works of N.K. and tested it on one of the cranes now in use.

TL;DR: In this paper, a performance index which minimizes the inverse optimal control problem for nonlinear autonomous systems is developed, for which the horizon distance is an easily computed explicit function of the state.

TL;DR: In this paper, a survey of the structure and properties of generalised, linear, autonomous, dynamical systems S(F, G) described by a homogenous pencil sF-ŝG is presented.

TL;DR: An optimization algorithm is presented which permits all constraints of control system design requirements to be considered, including robustness, low noise sensitivity, and return difference transfer function matrix constraints.

TL;DR: In this article, modern control theory is used to regulate a double pendulum hinged to a cart on a rail, where only one angle of the pendulum is measured, and the system is stabilized in all four equilibrium points.

TL;DR: It is concluded that fuzzy control is a practicable and effective way of increasing the level of coordinative control on industrial processes.

TL;DR: In this article, the authors present problems about dynamical control of industrial robots performing high speed continuous movement are presented, where the influence of the control implementation via a discrete algorithm, of joint elasticity (neglected in the control design) and of parameter variation is evaluated by using simulation.

TL;DR: In this article, a decentralized control scheme for linear systems composed of overlapping subsystems is proposed, where a higher dimensional space is formed where the subsystems appear as disjoint, and standard optimization techniques can be used to formulate a sub optimal decentralized control law for the overall system.

TL;DR: In this article, a coordination level is introduced which contains methods for the on-line determination of specification parameters and supervision control functions, and the proposed extended parameter-adaptive control scheme for an aircondi tioning pilot plant show that a considerable improvement of the overall control behaviour can be achieved and the tuning time for this "selftuning" controller can be drastically reduced.

TL;DR: In this paper, the problem of designing control laboratory experiments which can help control engineering students to get a better understanding of the control theories and how the theories can be implemented in real life systems is discussed.

TL;DR: An approach to adaptive control based on direct minimization of a posed performance criterion with respect to the regulator parameters is described using a stochastic approximation technique and it is shown how the instrumental variable technique can provide such information.

TL;DR: The method of obstacle avoidance for a robot-manipulator in a complex unknown environment is proposed which requires only local information about the mere presence of an obstacle in the immediate vicinity of the moving manipulator.

TL;DR: In this article, the authors consider the problem of optimizing the performance of Flexible Manufacturing Systems (FMS) and present an analytical model of FMS that can be used for optimal feedback control.

TL;DR: Some recent developments in the theory of linear systems over rings are described, focusing on problems of regulation, as well as on applications to delay systems and computational methods for classical linear systems.

TL;DR: A new method of complex parametric systems identification which is called the general parameter method is described which makes it possible to reduce significantly the computation procedure in estimating complex control systems parameters.

TL;DR: In this article, the design and application of a multivariable control in the hot strip mill looper is discussed, and the feasibility of supplement compensation of derivative action is investigated, simulation study proved further possibilities of the looper control.

TL;DR: In this article, a mathematical formulation of a multi-objective trajectory optimization problem is presented, with an interpretation as a semi-regularization procedure for ill-posed problems, and examples of actual applications.

TL;DR: A new type of performance index, i.e., a weighted integral of squared error is introduced and is implemented on a small size digital controller and applied to some real processes, yielding satisfactory results.

TL;DR: In this paper, the main results of an experimental application of an optimal control to a drum boiler power plant at the Italian national electricity board are presented, where the performance of a well tuned coordinated control, of the classical optimal regulator and of the reformulated optimal control structure are compared.

TL;DR: In this article, the necessary and sufficient conditions for autonomous controllability are obtained, and these results can be used to design a fault-tolerant control system either by integrating subsystems or dividing a system.

TL;DR: In this article, a mathematical justification of the truncation is given applying singular perturbation theory, and error bounds for the substantial eigenvalues are developped under which conditions the control system design basing on the truncated model is admissible.

TL;DR: In this paper, an adaptive control algorithm is shown to be exponentially convergent under a persistently exciting condition on the reference trajectory together with some standard conditions, including a spanning condition.

TL;DR: In this article, a study of the characterization of decentralized fixed modes for large scale interconnected systems is made, in which the existence of fixed modes of a v-control agent system is expressed in terms of the presence of fixed mode of v-1 control agent systems.

TL;DR: This fuzzy linear programming problem based on fuzzy functions can be regarded as a model of decision problems where human estimation is influential and obtained a reasonable solution under consideration of the ambiguity of parameters.