Testing and validation of flight hardware in ground-based facilities can result in significant cost savings and risk reduction. We designed a relative motion emulator for aerospace vehicles using omni-directional mobile bases which provide large 3 degree-offreedom motion, while Stewart platforms mounted atop these bases allow superposition of limited 6 degree-of-freedom motion. This paper addre...

In this paper, dimensioning of Universal Mobile Telecommunication Systems (UMTS) Radio Access Method (RAN) has been performed with respect to varying antenna gain of NodeB and sectorization of site layout of network sites. Three different site layouts have been configured to estimate the number of sites required to cover the deployment area. In the first site layout, Single Omni directional ant...

Abstract In order to enable a robot do the omni-directional mobility for inspection in pipeline of Gas Insulation Switchgear, negative pressure adsorption is designed. Firstly, mechanical structure was designed based on adsorption. The internal surface motion model built, and variable control method proposed by analysis. Simulations experiments showed that could steadily adsorb any position pip...

Camera-based simultaneous localization and mapping or visual SLAM has received much attention recently. Typically single cameras, multiple cameras in a stereo setup or omni-directional cameras are used. We propose a different approach, where multiple cameras can be mounted on a robot in an arbitrary configuration. Allowing the cameras to face in different directions yields better constraints th...

The Mecanum wheel was designed in Sweden in 1975. Using four of these wheels provides omni-directional movement for a vehicle without needing a conventional steering system (Muir & Neumann, 1990; Dickerson & Lapin, 1991; Braunl, 1999; Navy, USA, 2002 and Lunze & Schmid, 2002). The wheel itself consists of a hub carrying a number of free moving rollers angled at 45° about the hub's circumference...