The aim of this paper is to present the results of a measurement campaign focused on the evaluation of penetration loss into buildings in an urban area as a function of the elevation angle. An empirical model to predict penetration loss into buildings is developed based on measured data obtained using a remote-controlled airship. The impact on penetration loss of different buildings and user po...

Aiming to the imaging tasks scheduling problem on high-altitude airship in emergency condition, the programming models are constructed by analyzing the main constraints, which take the maximum task benefit and the minimum energy consumption as two optimization objectives. Firstly, the hierarchy architecture is adopted to convert this scheduling problem into three subproblems, that is, the task ...

Based on the biaxial experiment data of membrane material under hot and cold conditions, mechanical properties calculation model envelope was established with consideration effects varying stress ratios, magnitudes temperatures near-space airship material. Using heat source model, Computational Fluid Dynamics (CFD) simulation, User-Defined Function (UDF), structural finite element analysis soft...

All relevant key techniques involved in photogrammetric vision metrology for fully automatic 3D measurement of large-scale structure are studied. A new kind of coded target consisting of circular retroreflective discs is designed, and corresponding detection and recognition algorithms based on blob detection and clustering are presented. Then a three-stage strategy starting with view clustering...

Recently, there has been increasing interest in autonomous navigation for the Unmanned Airship Vehicles (UAV) in indoor environments since they have the ability to navigate in low altitude and low speed for exploration applications. In this paper, we presented a two layer fuzzy approach to light-weight embedded blimp system navigates in unknown environment. The fuzzy rules base for the first la...

Two kinds of platform are accepted for mapping UAV system. One is remotely-piloted aircraft. Another is unmanned helium airship. A super-wide-angle camera is constructed by four digital cameras, mounted in different optical axis directions. A high accuracy calibration method is used to make compensation for the deformed errors due to the light and simple constructed mechanical frame. According ...

When ground observation or signal relaying in the vicinity of an unfriendly operative scenario are interest, such as for military actions disaster relief, high-altitude airships (HAA) offer some technical benefits. Featuring a milder cost and higher deployment flexibility with respect to lower-Earth orbit satellites, these platforms, often baptized pseudo-satellites (HAPS), operate sufficiently...