نتایج جستجو برای: uav
تعداد نتایج: 11520 فیلتر نتایج به سال:
The Use of Mobile Laser Scanning Data and Unmanned Aerial Vehicle Images for 3d Model Reconstruction
The increasing availability in multiple data sources acquired by different sensor platforms has provided the great advantages for desired result achievement. This paper proposes the use of both mobile laser scanning (MLS) data and Unmanned Aerial Vehicle (UAV) images for 3D model reconstruction. Due to no available exterior orientation parameters for UAV images, the first task is to georeferenc...
To perform formation flight of multiple UAVs (Unmanned Aerial Vehicles), an accurate guidance law is required. Existing guidance law based on nonlinear path-following guidance method provides outstanding path following performance. However, the nonlinear guidance law does not reflect the characteristics of UAV, and therefore the performance of the guidance law may be degraded in the real enviro...
With unmanned aerial vehicles (UAVs), 36 licensed pilots flew both single-UAV and dual-UAV simulated military missions. Pilots were required to navigate each UAV through a series of mission legs in one of the following three conditions: a baseline condition, an auditory autoalert condition, and an autopilot condition. Pilots were responsible for (a) mission completion, (b) target search, and (c...
Sensors deployed in remote locations provide unprecedented amounts of data, but powering these sensors over long periods remains a challenge. In this paper, we develop and present a UAV-based wireless power transfer system. We discuss design considerations and present our system that allows a UAV to fly to remote locations to charge hard to access sensors. We analyze the impact of different mat...
—An Unmanned Ariel vehicle (UAV) has greater importance in the army for border security. The main objective of this article is to develop an OpenCV-Python code using Haar Cascade algorithm for object and face detection. Currently, UAVs are used for detecting and attacking the infiltrated ground targets. The main drawback for this type of UAVs is that sometimes the object are not properly detect...
UAV (Unmanned Aerial Vehicle) photogrammetry, which combines UAV and freely available internet-based 3D modeling software, is widely used as a low-cost and user-friendly photogrammetry technique in the fields such as remote sensing and geosciences. In UAV photogrammetry, only the platform used in conventional aerial photogrammetry is changed. Consequently, 3D modeling software contributes signi...
سامانه رادار چند پایه پس پرش ماورا افق (O-MSRS) جدیدترین نوع سامانه راداری در حال توسعه است که نوع آن پرسش های فراوانی را در بین صاحب نظران نظامی مطرح نموده است. وظیفه و عمل این سامانه، مراقبت هوایی از ناحیه ای وسیع و مراقبت و شناسایی نظام مند و بطور پیوسته منطقه ای فراتر از خطوط مرزی است. این سامانه جهت کشف وسایط تهاجمی هوایی در ارتفاع پست و مسافت های زیاد مانند هواپیماهای بدون س...
The studies in aerial vehicles modeling and control have been increased rapidly recently. In this paper , a coordination of two types of heterogeneous robots , namely unmanned aerial vehicle (UAV) and unmanned ground vehicle (UGV) is considered. In this paper the UAV plays the role of a virtual leader for the UGVs. The system consists of a vision- based target detection algorithm that uses the ...
Most vision-based UAV (Unmanned Aerial Vehicle) navigation algorithms extract manmade features such as buildings or roads, which are well structured in urban terrain, using the CCD camera. But in the mountain area, extracting, matching or tracking features is more difficult than doing the tasks in the urban terrain. And a CCD camera cannot carry out the computer vision algorithm that is require...
The article presents an approach to the control of a UAV on the basis of 3D landmark observations. The novelty of the work is the usage of the 3D RANSAC algorithm developed on the basis of the landmarks' position prediction with the aid of a modified Kalman-type filter. Modification of the filter based on the pseudo-measurements approach permits obtaining unbiased UAV position estimation with q...
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