Some Aspects Regarding the Elaboration of Multiple Precessional Gear Theory and Modern Manufacturing Technology

The engineering complex study of the triad “gear-technology-transmission” has permitted to elaborate a new type of precessional transmissions with multicouple gear. In this paper, the authors present the mathematic model of the multicouple gear. A computer program for doing this it is also elaborated. It is shown a blockscheme of the algorithm of the program modules including the calculus modalities exposed in the paper

Dynamic model elaboration for the planetaryprecessional gear reducer against vibration

The purpose of modern-day machines in general and gear-box in particular is to carry out needs-based on maintenance, good working conditions and to minimize the repair and other servicing downtimes and disfunctionalities. This increases the overall equipment effectiveness and optimizes the cost. The mechanical condition of a machine or a machine components can be accurately diagnosed from the nature and extend of vibration they generate. The aim is to detect damage as it occurs, allowing scheduled repairs or maintenance to be carried out in time

CAE DEVELOPMENT OF PRECESSIONAL DRIVES USING AUTODESK INVENTOR PLATFORM

The paper presents the modelling and simulation of precessional drives designed in two variants capable of high transmission ratio and torque for one stage compact construction. The constructions were designed in Inventor and also as multi body systems in otionInventor. The simulations of the drives provide information concerning positions, velocities, accelerations, point trajectories, forces and moments, energies, as well as contact forces at the contact between gear teeth and satellite teeth and other data concerning the system

Selection of a Solution When Using Axiomatic Design

Over the years, the importance of the creativity inclusively in the field of design activities was highlighted. In accordance with the opinions of certain researchers, the divergent thinking could contribute to the increase of creative processes efficiency. On the other hand, the axiomatic design method is considered as a method able to stimulate the technical creativity when the problem of designing a mechanical equipment is stated. To increase the efficiency of using the axiomatic design method, the possibility of selecting the most convenient solution among many available solutions could be discussed. The analysis revealed that there are many methods that could be applied in the process of optimum solution selection among many available solutions. In this paper, some aspects concerning the possibilities of using the method of analytic hierarchy process are analyzed, inclusively by considering a case study concerning a device for investigating the universal horizontal lathe rigidity. Afterwards, the first axiom from axiomatic design method was applied to define the selected solution for the approached device

Selection of a Solution When Using Axiomatic Design

Over the years, the importance of the creativity inclusively in the field of design activities was highlighted. In accordance with the opinions of certain researchers, the divergent thinking could contribute to the increase of creative processes efficiency. On the other hand, the axiomatic design method is considered as a method able to stimulate the technical creativity when the problem of designing a mechanical equipment is stated. To increase the efficiency of using the axiomatic design method, the possibility of selecting the most convenient solution among many available solutions could be discussed. The analysis revealed that there are many methods that could be applied in the process of optimum solution selection among many available solutions. In this paper, some aspects concerning the possibilities of using the method of analytic hierarchy process are analyzed, inclusively by considering a case study concerning a device for investigating the universal horizontal lathe rigidity. Afterwards, the first axiom from axiomatic design method was applied to define the selected solution for the approached device

Resilient Energy SystemsRenewables: Wind, Solar, Hydro /

VIII, 507 p. 424 illus., 330 illus. in color.onli

A Multimodal Environment for Cooperative and Transnational Training Activities

International audienceThis paper deals with a project that aims at improving students' engineering skills especially when the actors of the project, the tasks to be achieved and the knowledge, are distributed between several different countries. The goal is to set up a digital environment that is capable of hosting distributed and cooperative practical activities for groups of students from different universities and different countries working together on the same activities. In terms of learner's behaviour, we aim at increasing motivation, minimizing passivity, stimulating group work and promoting cooperation and interaction among the students. Besides, at the level of academia, we aim at simplifying and rapidly transferring new knowledge as well as popularizing complex aspects and forbidding subjects by using new information technologies. In the following sections we lay out our implementation of the virtual classroom metaphor and we describe how we distributed our virtual worlds (X3D/VRML, JavaScript and AJAX). Further in the article we explain how we coped with the constant need for change and extensions in the context of distributed virtual environments: new objects to fill the ever-growing 3D world, and in the context of pedagogical activities: new activities, new topics, new methods, etc, by the means of a plug-in-like concept