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Based on the resulted unit step responses, the system has a good working behaviour, stable dynamically to the wind speed variation and also to the load variations at the motor shaft. Key words: hydraulic transmission, wind turbine, Simulink, unit steps. DYNAMIC MODELS FOR TRACTION SYSTEMS by ADRIAN SORIN AXINTI and GAVRIL AXINTI Abstract. The work presents a classification of traction systems as a function of structure, the systems being classified into: integrally mechanic-traction systems–STIM, mechanichydrostatical traction -STMH and integrally traction hydrostatical systems STIH. Each structural model contains the main components from dynamic point of view: the heat engine as the source of energy, the transmission of the traction and the system for movement formed of wheels with tyres or of self-propelled equipment. For each structural model is the dynamic model to which dynamic analyses should be done by excitation accomplished by the road (the runaway). The necessity of these models has been due to the study models of dynamic behavior and of traction systems comparison of different structures, mechanic, mechanic and hydraulic. Key words: dynamic model, transmission, traction, hydraulic. MODELS FOR THE HYDRAULIC SEISMIC ENERGY DISSIPATERS by GAVRIL AXINTI and ADRIAN SORIN AXINTI Abstract. This article refers to the complex seismic energy dissipaters based on hydrostatic equipments that are capable of destroying the energy of the earthquake, shock or vibration, for various frequencies, dissipaters that connect the body system object to the dynamic phenomenon with its ground basis. Key words: models, hydraulic, seismic energy, dissipater, etc.
RESEARCH ON EXPERIMENTAL HEAT EFFECTS IN A FLOW WITH HARMONIC DRIVE INSTALLATION I. DRIVE INSTALLATION OF HARMONY FLOW − ASSEMBLY IN PARALLEL by CARMEN BAL, CARMEN IOANA IUHOS and NICOLAIE BAL Abstract. Paper aims to highlight the phenomenon of heat conducted into a sonic installation. Heat is produced and sent away by vibration. Key words: sonic pressure, sonic flow, friction resistance, sonic condenser, temperature. DYNAMIC ANALYSIS OF A HYDRAULIC ACTUATION SYSTEM OF VERY SLOW MOVING DEVICES VLAD BOCĂNEŢ, HORIA ABĂITANCEI, CONSTANTIN CHIRIŢĂ, MARIUS DENEŞ-POP and LIVIU BĂRNUŢIU Abstract. The paper presents research conducted for a hydraulic actuation system designed to propel a slow moving device. During system run, the stability of the system has to be assured, considering the slow moving velocity of the device. In order to analyse the system, a multi-domain model was developed to identify the influences of geometry and running conditions on system behaviour. In order to appreciate the influences of different running parameters, the propelling speed, pump displacement and motor displacement are considered. Instabilities at system run-up are identified and are relative rapidly damped. Key words: fluid power, slow moving system, multi-domain simulation etc. NEW CONTRIBUTIONS IN THE CORRELATION OF MECHANICAL PROPERTIES WITH THE CAVITATION RESISTANCE OF STAINLESS STEELS
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