Manufacturing tolerancing is intended to determine the intermediate geometrical and dimensional states of the part during its manufacturing process. These manufacturing dimensions also serve to satisfy not only the functional requirements given in the definition drawing, but also the manufacturing constraints, for example geometrical defects of the machine, vibration and the wear of the cutting...

Two different designs, A and B, with notable different geometrical parameters, were compared. The S-Stent was simulated to expand from its as cut configuration on a hyperelastic balloon model under physiological deployment pressure (below 18 atm). The numerical simulation results reveal that stent B, at diametric expansion of 3.3mm OD, experiences a 50.5% reduction in plastic strain and 10% les...

X-ray emission spectroscopy in a point-to-point focusing geometry using instruments that employ more than one analyzer crystal poses challenges with respect to mechanical design and performance. This work discusses various options for positioning the components provides formulas calculating their relative placement. Ray-tracing calculations were used determine geometrical contributions energy b...

This paper presents a neural network based approach to a mobile robot positioning in front of a certain local object. The robot is equipped with ultrasonic range sensors mounted round the platform. We employ the Fuzzy-ARTMAP network for supervised learning of associations between vectors of sensors readouts and the robot's pose coordinates. In this approach, a world model in a form of a map, as...

A superscalar microcontroller based system is used to control the Physik Instrumente (PI) piezo-electric ultrasonic nano-positioning (PUN) stage for a micro-factory has been proposed by the author. A Linux based development board i.e. BeagleBone containing TI AM3358/9 SoC based on an ARM Cortex-A8 processor core, is suggested to provide visual servo control to the nano-positioning stage. The st...

Major challenge in time-biased mobile positioning techniques is a derivation of reliable time of arrival or range measurements. Multipath propagation error corrupts the accuracy of positioning, and therefore adequate techniques need to be deployed. This paper proposes an algorithm for decreasing contribution of multipath propagation on positioning in networks, typical for macrocellular urban de...

The general aim of visual servoing is to control the motion of a robot so that visual features acquired by a camera become superimposed with a desired visual pattern. Visual servoing based on geometrical features such as image point coordinates is now well established. Nevertheless, this approach has the drawback that it usually needs visual marks on the observed object to retrieve geometric fe...