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Coordinate measuring machine uncertainty analysis using the combinatorial cyclic method of optimization

Ziętarski S., Kachel S., Benaouali A.

Mechanik

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2016

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R. 89, nr 7

876--877

EN

In this paper, The Combinatorial-Cyclic method of Optimization (CCOpt) is used to inspect the accuracy of a CMM by analyzing the standard deviation of measurements points on a calibration sphere. A software dedicated to perform sphere fitting and error analysis were developed within the frame of the integrated CAD/CAM/CAE system SIEMENS (GRIP).

PL

W niniejszym artykule zaprezentowano kombinatoryczno-cykliczną metodę optymalizacji, która została wykorzystana do sprawdzenia dokładności maszyny współrzędnościowej poprzez analizę odchylenia standardowego punktów pomiarowych na kuli wzorcowej. Opracowane oprogramowanie dla systemu CAD/CAM/CAE Siemens NX jest przeznaczone do porównywania wzorca z obiektem rzeczywistym celem przeprowadzenia analizy błędów wykonania elementu rzeczywistego.

2

A unified method of identification and optimization of airfoils for aircrafts, turbine and compressor blades

Ziętarski S., Kachel S., Kozakiewicz A.

Advanced Technologies in Mechanics

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2015

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Vol. 2, no. 3 (4)

2--15

EN

Topics below are rather undesired, but important, outcome not yet completed research on the aircraft airfoils, turbine and compressor blades, parametric design of airfoils, establishing the relationships based on the results of experiments in a wind tunnel, developing databases for determining the relationships between airfoil parameters and lift and drag coefficients. Reliable database created as a result of the research work allows to simulate the wind tunnel. Very early on, however, was necessary to extend the developed specialized software for a new applications, and it meant the need for generalization of software, e.g. for gas turbine engines, propellers, etc. But after some time it turned out, that in order to achieve the required accuracy, the changes are needed in the underlying assumptions, set decades ago. In addition, coordinate measuring machines and systems, and associated software were not always as accurate as expected. Concepts how to solve it and develop software carrying out these tasks are presented in the article. It is like to withdraw from the old path and look for a new path that will lead to the reliable data base. Processes related to air or gas flow should be similarly defined in all the specialized software applications (e.g. aircrafts and turbine engines). Accuracy (10-9 mm) achieved in virtual measurements within the integrated system can be used to verify the results of CMM and other measuring systems, provided that an appropriate software has been developed.

3

A new approach to identification and optimization of airfoils by using the combinatorial-cyclic method

Ziętarski S., Kachel S., Kozakiewicz A.

Advanced Technologies in Mechanics

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2014

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Vol. 1, no. 1 (1)

2--14

EN

For the last several years the combinatorial-cyclic method of optimization has been validated and expanded to new areas of applications. Although coordinate measurement analysis still is the main area of applications, the method is becoming a useful and unique tool in design optimization, reverse engineering (parametric design included), and virtual engineering. The case study aerodynamics of airplane and turbine airfoils, and simulation of wind tunnels is very difficult and promising as well. To solve all problems arising in these areas, an extensive software within the integrated CAD/CAM /CAE system has been developed, written in GRIP (SIEMENS NX 3.8).