Unmanned surface vehicle

In this study, combinations of aerial images captured using UAV and geo-processing software, ArcGIS, are promoted towards automated approach for counting shipping containers. The overlapping UAV aerial images are post-processed using photogrammetric technique to create Digital Surface Model (DSM) which represents the ground and above surface feature’s elevations. Then, the constructed DSM is filtered to produce the Digital Terrain Model (DTM) that represents the ground surface only. T

5p longtimenosee10 26-04-2024 1 1   Download

Route preparation for drones is a complex method to achieve an optimal path and meet constraints following specific tasks. This paper addresses the problem of a planning method for a multi-copter unmanned aerial vehicle (UAV) to examine ground surfaces.

8p viwarmachine 01-07-2023 6 5   Download

This paper introduces a simplified control method for the trajectory tracking problem of an under-actuated Unmanned Surface Vehicle (USV). The proposed method consists of a guidance law for intermediate variables, which are the pseudo-yaw angle and the pseudo-surge velocity, and a ProportionalIntegral (PI) controller.

8p viporsche 25-10-2022 9 2   Download

Single beam echo sounders (SBES) mounted on unmanned surface vehicles (USVs) are widely used in hydrographic surveying, particularly for detecting water depth and digital depth mapping, among other things. Because of conditions such as ocean waves, the relative level arm of each component, and errors in each component device, using only SBES and GPS sensors leads to significant errors and poor accuracy. Now the SBES sensor's accuracy has improved.

8p vimelindagates 18-07-2022 12 2   Download

Bài viết đề xuất bộ điều khiển ổn định động cho phương tiện nổi tự hành USV (Unmanned Surface Vehicle) với mô hình thiếu cơ cấu chấp hành. Bộ điều khiển được thiết kế dựa trên phương pháp trượt tầng, mạng nơ ron nhân tạo được sử dụng để xấp xỉ khi ta xét đến vấn đề mô hình của hệ thống bị thay đổi cũng như các nhiễu bất định tác động trong quá trình hoạt động.

9p vihassoplattner 04-01-2022 32 2   Download

While petrochemical industry plays an important role of economic development in Kaohsiung city, it releases significant emission of volatile organic compounds (VOCs) that are major precursors for surface ozone and secondary organic aerosol (SOA). This study characterizes ambient VOCs at different heights in Renwu industrial district, Kaohsiung, Taiwan.

3p viwinter2711 05-10-2021 13 1   Download

A manipulation system for unmanned surface vessels (USVs) as well as other unmanned vehicles and autonomous vehicles are commonly built up by three vital components which are guidance system, navigation system and control system, regardless of the mechanical aspects. In which, the navigation system will first use sensors to measure and estimate parameters, then feedback to the guidance system and the control system as input data. Based on those data and assignments from user, the guidance system calculates and outputs reference data for the control system.

11p trinhthamhodang9 04-12-2020 16 2   Download

This work employs ANSYS fluent CFD tool to calculate thrust generated a rotor covered by a ring surface using in UAV. The aim of this paper is to characterize the effects of geometry parameters of the ring surface such as diameter and height on the thrust of the rotor.

6p visasuke2711 25-04-2019 19 0   Download

This paper describes a new approach for monitoring the construction progress of the Urban Railway Construction Project “Metro line1 - Ben Thanh - Suoi Tien” by using Unmanned Aerial Vehicles (UAV) to capture high resolution imagery at different stages of the project. The advantage of the AscTec Falcon 8 systems lies in their high flexibility and efficiency in capturing the surface of an area from a low flight altitude.

9p sansan2 26-05-2018 36 3   Download