Mecanismo Diseñado y Simulado Virtualmente

Objectives: To show a process to synthesize and analyze a crank mechanism oscillator function generator. Simulate it in a virtual reality environment, without losing its physical characteristic. Evaluate deviations between analytically desired and virtually obtained. Methodology: Using the analytical method described by Hartenberg and Denavit, a graphic package and an electronic spreadsheet; knowing the angle of rotation of the crank, the angular reference position of the crank, the displacement of the oscillator, the extreme values of the independent variable and the function; precision positions, link lengths, eccentricity and oscillator reference position were determined. The links were generated, the mechanism was assembled, analyzing fifteen of its positions. Of the infinite number of existing solutions, five were synthesized. For each solution that justify it, the deviation of the generated function was evaluated with respect to the desired one. Contribution: The friendly, fast, safe, accurate and parametric process was demonstrated; modifying the inputs and checking the update of the outputs, therefore it is a contribution to the scientific progress of the area.

Developing 3D–models for training facilities of a space complex

The paper discusses problem statement for and software implementation of a Graphic Package Adaptation System (GPAS) intended for reading and processing graphic design data, produced by the CAD system PTC Creo. The idea is to introduce into the process of building a 3-D model of a spacecraft for training facilities an additional operation of ‘automated adaptation of the graphic package’. The proposed process does not exclude manual refinement of the model, however, including additional automated components into the process makes it possible to significantly reduce human effort required to build a model for training facilities. The exchange of models between PTC Creo, GPAS and Autodesk 3ds Max is conducted at the level of the open format Virtual Reality Modeling Language (VRML). The paper describes GPAS architecture, provides views of work windows of the program, and methods of running its main functions. Key words: Digital design model, polygonal model, simplification, graphic design data.