5.) Abstract
My work to do was to make a program in Javascript that controls a bearing on lifetime by considering reliability.
The second part was to make a grafic program with Phigs library that shows a bearing with its dimensions.
Also I had to make a program that allows to make basic grafic transformations like rotation, translation an scalling.
To solve the problem of grafic transformation I calculated the composited matrice and builded it in my basic program
of the grafical design of the bearing in Javascript using Phigslibrary. The Phigslibrary contented only the basic
function for drawing lines. So I had to include some mathematical calculations to draw simple geometric elements
like circles, radius etc.
The part of bearing calculation was an easy part to do. By having some basic knowledge of program languages like "C" or
"Fortran" etc. it shouldn't be a problem to programing in Javascript. In the program are shown two diagrames. They are usally
used to read out from it the koeficients a1 and a23. I had to make a program that calculates this
koeficients, so it isn't neccesarry for the user to take the factors out of the diagrame. Here I had to make some numerical
processes to wide up the spectrum of rotating speeds of bearings. I solved this by lineary numerical interpolation. By this
step it is possible now to make calculations for all rotation speeds between 500 and 5000 min-1 without taking
necessary koeficients out of diagrams. The advantage of making a W3 side in Javascript is the
dynamice of using it. For instance making a W3 side with HTML is a very statical, allow me to say -dead- side on whitch
nothing especially happens. I think that if you have the complete library of Phigs (not only the posibility to draw lines)
it may be a very usefull thing to make grafic stuff.
My name is Sasa Ciglar, graduate student, 6. semester, Faculty of mechanical engineering, University of Ljubljana, Slovenija.
My mentor is as. dr. Roman Zavbi.
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