Propulsion systems

Carlton, J.S.

doi:10.1016/b978-075068150-6/50004-8

Cited by 48 publications

(19 citation statements)

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“…A high-pitched propeller allows the flow to move faster by traveling further with each rotation. The ratio (P/D) typically falls between 0.5 and 2.5, with an optimal value for the most best-performing propeller close to 0.8 to 2.0 [ 23 ]. The ratio (P/D) of our propeller is 2.0.…”

Section: Methodsmentioning

confidence: 99%

A Miniature Intermittent-Flow Respirometry System with a 3D-Printed, Palm-Sized Zebrafish Treadmill for Measuring Rest and Activity Metabolic Rates

Huang

Tsao

Fang

2020

Sensors

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Zebrafish are a preferred vertebrate model for evaluating metabolism during development, and for toxicity studies. However, commercially available intermittent-flow respirometry systems (IFRS) do not provide a suitable zebrafish-scaled swimming tunnel with a low water volume and proper flow velocities. We developed a miniature IFRS (mIFRS) with a 3D-printed, palm-sized zebrafish treadmill for measuring the swimming ability and metabolic rate of a single one- or three-month-old zebrafish with and without toxicity treatment. The 3D-printed zebrafish treadmill consists of discrete components assembled together which enables the provision of a temporary closed circulating water flow. The results showed that three-month-old zebrafish of normal physiological status had higher energetic efficiency and could swim at a higher critical swimming speed (Ucrit) of 16.79 cm/s with a lower cost of transport (COTopt) of 0.11 μmol g−1m−1. However, for a single three-month-old zebrafish treated with an antibacterial agent, Ucrit decreased to 45% of normal zebrafish and the COTopt increased to 0.24 μmol g−1m−1, due to the impairment of mitochondria. Our mIFRS provides a low-cost, portable, and readily adaptable tool for studying the swimming performance and energetic metabolism of zebrafish.

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Section: Methodsmentioning

confidence: 99%

A Miniature Intermittent-Flow Respirometry System with a 3D-Printed, Palm-Sized Zebrafish Treadmill for Measuring Rest and Activity Metabolic Rates

Huang

Tsao

Fang

2020

Sensors

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“…Thrust, torque, and efficiency coefficient patterns of a Ka-4-70 screw series propeller ducted with a 19-A nozzle as a function of J and the p / d . 10 …”

Section: Propulsion System Characterization: Parameter Identificationmentioning

confidence: 99%

Development and testing of an efficient and cost-effective underwater propulsion system

Paolucci

Grasso

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part I:

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Underwater vehicle propulsion performed by exploiting electrical motor is in general the most flexible solution and it is growing in popularity because of its high efficiency both at high and at low advance speed, quick and simple deployment, low costs, and encumbrance. In the present work, permanent magnet synchronous motors for underwater propulsion are proposed. In particular, advanced sensorless control techniques of permanent magnet synchronous motors permit reduced costs, high reliability, and performances. When dealing with small autonomous underwater vehicle propulsion, such devices are hard to find in the market. Hence, the authors focused the research in the development of a system able to perform a reliable rotational speed and torque sensorless estimation. The design and implementation of a complete solution for underwater propulsion are presented as well as a novel rotor polarity identification technique exploiting a high-frequency injection control. Pool tests for the identification of the performances and of the dynamic parameters of the propulsion system are presented. Finally, the possibility of operating a sensorless estimation of the thrust and torque exerted by the propeller and pool test measurements are presented. These features could be exploited to improve navigation accuracy and involves obvious benefits in terms of cost reduction and reliability of the system.

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“…Energy efficiency. The thruster efficiency is quite low and it is further degraded especially in the presence of crossflow as stated by many theoretical and experimental studies available in the literature; 1,27,28…”

Section: Propulsion Systemmentioning

confidence: 99%

Preliminary design and fast prototyping of an Autonomous Underwater Vehicle propulsion system

Allotta

Pugi

Bartolini

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part M:

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The Mechatronics and Dynamic Modelling Laboratory of the Department of Industrial Engineering, University of Florence, as a partner of THESAURUS (Italian acronym for ‘TecnicHe per l’Esplorazione Sottomarina Archeologica mediante l’Utilizzo di Robot aUtonomi in Sciami’) project, has developed an innovative low-cost, multirole autonomous underwater vehicle, called Tifone. This article deals with the adopted methodologies for the autonomous underwater vehicle design: in particular, the main focus of this study is related to its propulsion system. According to the expected performances and requirements of THESAURUS project, the vehicle has to maintain good autonomy and efficiency (typical features of an autonomous underwater vehicle), with high manoeuvrability and hovering capabilities, which are more common of remotely operated vehicles. Moreover, cooperative underwater exploration and surveillance involve the use of a swarm of vehicles. In particular, the optimization of costs versus benefits is achieved through the design of a fleet of three multirole vehicles. Each autonomous underwater vehicle has five controlled degrees of freedom, thanks to four thrusters and two propellers: in this article, the preliminary design criteria concerning the vehicle and the design and testing of its actuation system are described

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Propulsion systems

Cited by 48 publications

References 0 publications

A Miniature Intermittent-Flow Respirometry System with a 3D-Printed, Palm-Sized Zebrafish Treadmill for Measuring Rest and Activity Metabolic Rates

A Miniature Intermittent-Flow Respirometry System with a 3D-Printed, Palm-Sized Zebrafish Treadmill for Measuring Rest and Activity Metabolic Rates

Development and testing of an efficient and cost-effective underwater propulsion system

Preliminary design and fast prototyping of an Autonomous Underwater Vehicle propulsion system

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