With the aim of synthesizing technical systems by using physical laws, an engineering designer proceeds from the fact that a great majority of physical laws includes variables and constants, which describe the essential geometry needed for their realization. For each physical law, a complementary basic scheme is chosen. The method presented in the article is based on the premise that if it is possible to describe a technical system with a physical law or a chain of physical laws, then it should also be possible to set up its basic geometry from a complementary basic scheme or from a chain of complementary basic schemata. The method enables a partially automatic approach to the elementary embodiment process and also provides support for elementary embodiment design.
COBISS.SI-ID: 12179483
This article examines the measurement uncertainty in terms of the incident angle, the object colour and the measurement distance for a Computer Numerical Control (CNC) laser-scanning process. It describes a new method for predicting the measurement uncertainty that simultaneously considers all three parameters. The final result of this research is an equation model that allows an accurate prediction of the measurement uncertainty within the investigated measurement field while the results of the extrapolated measurement field give an accuracy of the prediction that is better than 15%. In general, the model can also be useful as a measuring guideline for any other laser-triangulation measuring device, although the values would need to be adapted to each particular device.
COBISS.SI-ID: 11915803
The authors have developed a method/computer tool to assist (student) engineering designers in generating concept designs. The method is based on the chaining of physical laws and complementary basic schemata (BS). The tool generates chains which serve as an aid in the development of concept designs. In this paper, the authors compare concept designs generated by a control group (which used functional structure and morphological matrix) with those from an experimental group that used computer-generated chains. The experimental group was found to have generated a greater number of different solutions than the control group; the generation of different solutions indicates a high level of variety and a better chance to find potentially innovative solutions. The established difference in the number of different solutions is statistically significant and the results indicate that the BS facilitate greater variety of concept designs.
COBISS.SI-ID: 12446235
In today's multidimensional world, companies are constantly facing new, increasingly demanding challenges: global business and local operation, the standardization and individualization of products, demanding customers, and fierce competition. These companies want to achieve a shorter product-development time, lower costs, higher quality of the product, and finally, customer satisfaction. In order to achieve these goals, companies have to take into account the first customers wants and needs during the process of developing a new product. This article presents the concept of solutions for the functional requirements in the concurrent development of a product by means of a descriptive matrix of the functional requirements and functionalities based on the generative model and criteria for describing the products, the function requirements, and the functionalities. The matrix of the functional requirements and functionalities model intends to improve the initial, preliminary design process, where only the most basic, sporadic information (such as functional requirements and functionalities) is presented. The tasks are parallelized and integrated to reduce the time and costs involved. The model was created as a tool in order to connect the functional requirements with existing technical systems. They partially or fully resolve the functional requirements on the basis of a mathematical model and predetermined conditions, and therefore do not depend solely on the designers intuition. The concept improves the main shortcomings of other known methods such as the morphological box. In order to demonstrate the validity, the benefits of the method, the dynamics, to produce explanatory theories and to develop a method that is relevant to practice, the matrix of the functional requirements and functionalities model is tested against a concrete product.
COBISS.SI-ID: 12580379
In this work we present basic principle of treecode (TC) method, its advantages and drawbacks in its applications for laboratory and fusion plasmas. Particular task done in this work was to create a small but efficient PIC simulation program in order to obtain more data than currently possible with other such programs available today, and to compare results of our program with results obtained with other methods and packages. The program is intended to be used in plasma-wall investigations of laboratory, technology oriented and fusion plasmas.
COBISS.SI-ID: 12612379