Articolele autorului Valentina E. Balas
Link la profilul stiintific al lui Valentina E. Balas

World Knowledge for Control Application by Fuzzy-Interpolative Systems

The paper is discussing the necessity of providing controllers with incipient elements of world knowledge: general knowledge on system theory, specific knowledge on the processes, etc. This can be done by means of the fuzzy-interpolative systems, allied with simulation models and/or planners. A structure of world knowledge embedding planned controller is illustrating the idea.

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Constant Time to Collision Platoons

The paper is presenting a new method for the management of the traffic flow on highways, based on the constant time to collision criterion. The criterion is applied for each car implied in traffic, and for the whole highway. Each car is provided with a constant time to collision cruise controller, which is maintaining optimal distance-gaps between cars, adapted to the speed and to the technical data of the cars. The traffic management center has

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Postmodernism and Control Engineering

Modernism is defined by some important features: rationalism (the belief in knowledge through reason), empiricism (the belief in knowledge through experience) and materialism (the belief in a purely physical universe). Postmodernism is a recent movement and a reaction to modernism. The term Postmodernism was coined in the early 60’s to describe the dissatisfaction with the modern architecture and became than a term for reaction to modernism in

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Traffic Management by Constant Time to Collision

The paper is presenting a new method for the management of the traffic flow on highways, based on the constant time to collision criterion. The criterion is applied at two levels, for each car implied in traffic, and for the whole highway. Each car is provided with a constant time to collision cruise controller, that is maintaining optimal distance-gaps between cars, in accor dance to the technical data of each car, the actual speed, and an imposed

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Observer-based adaptive variable structure control and synchronization of unknown chaotic systems

Most physical chaotic systems inherently contain nonlinearities which are commonly unknown to the system designer. Therefore, in modeling and analysis of such chaotic systems, one needs to handle unknown nonlinearities and/or uncertain parameters. This paper addresses two new adaptive output feedback controllers for a large class of chaotic systems with unknown dynamics in presence of external disturbances. As a generalization of the control problem,

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On the Switching Control

The paper is discussing the measures able to reject the instability that may unexpectedly appear in particular conditions, in switching controllers applications. The switching controllers' effect is explained by the combined effects of the unsuitable choice of the switching moments (in the first or third quadrants of the phase trajectory of the switching error) and of the temporal aliasing that can distort the digital control systems when the sampling

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Monoscopic CCD Cameras as Distance Sensors

In a previous paper the theoretical possibility of using CCD images as a distance sensor in the case of the car following systems was investigated. It was assumed that we are disposing of a pattern recognition software able to spot the image of the previous car. The proposed solution consisted in two operations: the estimation of the distance between the cars by the aria of the CCD image (in pixels) and the validation of the estimated distance by

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The Fuzzy Interpolative Control for Passive Greenhouses

The passive greenhouses are independent of any conventional energetic infrastructures (electricity, gas, hot water, etc.) They are relying exclusively on alternative energy sources: sun, wind, geo-thermal, etc. Their extensive use facilitates a massive ecological reconstruction of our planet, that could eventually reduce the CO2 concentration in the atmosphere and the consequent global heating. The paper is approaching the passive greenhouses control,

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World Knowledge for Control Applications

The paper is discussing the necessity of providing controllers with incipient elements of world knowledge: general knowledge on system theory, specific knowledge on the processes, etc. This can be done by means of simulation models and planners. Two benchmark studies developed using the fuzzy-interpolative methodology are proving the ideas.

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Decision-Making in Human Resources Selection Methodology

This paper underlines the fact that in human resources selection methodology not only the assessment instruments need to be standardized, but the selection criteria as well. In order to avoid toxic decision, taken under highly emotional states, witch commonly occur during the human resources selection process, we propose a fuzzy selection of the most appropriate candidates.

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