Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Fernando Gomes de Almeida"'
Publikováno v:
Sensors, Vol 24, Iss 17, p 5771 (2024)
This paper introduces a new variable structure controller designed for depth control of an autonomous underwater sensor platform equipped with a variable buoyancy module. To that end, the prototype linear model is presented, and a finite element-base
Externí odkaz:
https://doaj.org/article/a2f56bc55e72442d9e6985da73cb76c6
Publikováno v:
Sensors, Vol 24, Iss 10, p 3050 (2024)
Underwater long-endurance platforms are crucial for continuous oceanic observation, allowing for sustained data collection from a multitude of sensors deployed across diverse underwater environments. They extend mission durations, reduce maintenance
Externí odkaz:
https://doaj.org/article/6d176cf1723c43c4b43b06e8f7f9d410
Publikováno v:
Actuators, Vol 12, Iss 10, p 380 (2023)
Depth control is crucial for underwater vehicles, not only to perform certain tasks that require the vehicle to be still at a given depth but also because most propeller-driven vehicles waste a considerable amount of energy to counteract the passivel
Externí odkaz:
https://doaj.org/article/1655378769d64e358bd3dde23d7d3e12
Autor:
Sajjad Boorghan Farahan, José J. M. Machado, Fernando Gomes de Almeida, João Manuel R. S. Tavares
Publikováno v:
Sensors, Vol 22, Iss 9, p 3416 (2022)
The attitude and heading reference system (AHRS) is an important concept in the area of navigation, image stabilization, and object detection and tracking. Many studies and works have been conducted in this regard to estimate the accurate orientation
Externí odkaz:
https://doaj.org/article/0a8846f3c6204580a58316e3705e1e4a
Autor:
Miranda Fateri, João Falcão Carneiro, Constantin Schuler, João Bravo Pinto, Fernando Gomes de Almeida, Udo Grabmeier, Tobias Walcher, Michael Salinas
Publikováno v:
Micromachines, Vol 13, Iss 3, p 392 (2022)
In this paper, additive manufacturing was used in order to produce hose prototypes for peristaltic linear pneumatic actuators. In order to optimise the endurance of the actuator, we 3D printed different thermoplastic polyurethane elastomers with diff
Externí odkaz:
https://doaj.org/article/feace6989edf4cd7acd6f30c8a6047d6
Publikováno v:
Journal of Manufacturing and Materials Processing, Vol 6, Iss 1, p 8 (2022)
As the use of composite materials increases, the search for suitable automated processes gains relevance for guaranteeing production quality by ensuring the uniformity of the process, minimizing the amount of scrap generated, and reducing the time an
Externí odkaz:
https://doaj.org/article/d243d2ca13214581b3257c55ad244967
Autor:
Miranda Fateri, João Falcão Carneiro, Achim Frick, João Bravo Pinto, Fernando Gomes de Almeida
Publikováno v:
Actuators, Vol 10, Iss 7, p 161 (2021)
In this paper, endurance of peristaltic linear pneumatic actuators was studied using different hose geometries. Towards this goal, different hose geometries were additively manufactured using Fused Layer Manufacturing techniques of Thermoplastic Poly
Externí odkaz:
https://doaj.org/article/8a90ba9081a5408c9bdcdf13ec800d36
Publikováno v:
IEEE Access, Vol 4, Pp 6541-6553 (2016)
Pneumatic systems are clean and reliable actuators, presenting very high force to weight ratios. They further present some advantages, such as inherent compliance and suitability for fire hazard environments. However, their intrinsic nonlinearities h
Externí odkaz:
https://doaj.org/article/2c8b2f2978234dbea786bc5f0ee9ef58
Publikováno v:
Actuators, Vol 9, Iss 3, p 63 (2020)
Pneumatic linear peristaltic actuators can offer some potential advantages when compared with conventional ones. The low cost, virtually unlimited stroke and easy implementation of curved motion profiles are among those benefits. On the downside, the
Externí odkaz:
https://doaj.org/article/19e61451420d4974b7477b2f03cb5619
Publikováno v:
Information, Vol 11, Iss 2, p 76 (2020)
Pneumatic linear peristaltic actuators present several potential advantages over conventional ones such as low cost, virtually unlimited stroke, and an easy implementation of curved motion profiles. However, the body of this type of actuators also su
Externí odkaz:
https://doaj.org/article/2c5744e6f78e44a8a7ce529f00f9fb82