The basic idea of inverse optimal control theory for nonlinear systems is to find a feedback control law based on a priori knowledge of a Control-Lyapunov function (CLF), that leads to Lyapunov stability of the system and minimizes a cost functional [1], [4]. The problem of inverse optimal control leads to the Hamilton-Jacobi-Bellman (HJB) equation...

By Nicolae Pop, Luige Vlădăreanu, Adrian I. Pop

Modern processing is a combination of individual production cell, designed to complete the business of manufacturing parts of subassemblies and their integration into the final product of the product. The success of such a system depends on stability operations while minimizing the possible errors in the system. The continuous monitoring system is ...

By Tihomir Savo Latinovic, Mladen Todic, Cristian Barz, Adina Pop-Vadean, Paul Petrica Pop

Some considerations regarding different earthing electrodes types and arrangements are discussed. The computation of the earthing resistance and voltage distribution, the designing, installation and testing procedures are evaluated and compared. Typical mistakes, inadvertences, wrong or incomplete procedures are outlined, e.g. the soil resistivity ...

By Liviu Neamt, Horia Balan, Olivian Chiver, Alexandru Hotea

This article presents a new method for determining the effective capacity of a lead-acid battery by applying the least squares theory. Power supply of an isolated power grid can be achieved with a mix of sources, among which the most affordable are solar energy, wind power and fossil fuels. In these cases, the final price of the electricity obtaine...

By Dorin Sabou, Radu Tîrnovan

The development of modern process control systems for mechanized oil production using sucker-rod pumping units (SRPU), in particular during periodic well operation, requires information not only on the parameters of the reservoir, well and operation mode, but also the technical condition of surface and underground equipment. On the basis of the ana...

By Leonid Zamikhovskiy, Andrii Romanyuk

The paper approach some aspects of die design in various shape extrusion is quite complex and it is influenced by a variety of factors, which lead to increased mold performance in the extrusion process of high strength aluminum alloys. The analysis and the Solidworks computer program were used to analyze the extrusion of the shape from high strengt...

By Vasile Hotea, Jozsef Juhasz

During research of emergence and evolution of clusters in the particular case of Romania, it was noted the importance of a innovation systems of processes structure that is superposed from the very beginning on the structure of clusters, comprising also universities and research and design institutes. Considerations are made regarding the overlappi...

By Dinu Stoicovici, Mihai Bănică, Miorita Ungureanu

Jerk, as the derivative of acceleration, is used more and more in the kinematic study of the systems characterised by short travels and requiring a high precision of positioning, including elevators, CNC machine tools, and industrial robots. The acceleration modeling using jerk variation serve as a basis for generating the functioning tahogrames of...

By Ioana Craciun, Miorita Ungureanu

The Artificial Intelligence will be to the human brain what the backhoe was by hand. The great intellectual professions will all be impacted, which will free the human brain for more imagination. All the leaders of higher education establishments - engineering or business school, are facing two great challenges of artificial intelligence (AI). It i...

By Marius Calin Benea

The mining industry in Maramureș area was an important factor of economic and social progress in this zone. The gradual reduction of th mine activity, until its actual shutdown, has caused disturbances in the economic and social field. This type of industry was, and it continue to be, even in inactivity periods, a pollutant factor. Protecting the e...

By Octavia Domide, Gherasim Solovestru Domide