Controllability analysis and controller design for variable-pitch propeller quadcopters with one propeller failure

Development and Testing of a Passive Variable-Pitch Propeller

A novel approach to passive propeller blade pitch variation is investigated. To effect passive pitch changes, the propeller blades are allowed to pivot freely about a radial axis, and aerodynamic pitchingmoments are tailored to give favorablebladepitch angles over awide range of advance ratios.Computationalmodelingof the system indicated that a large expansion of the efficient operating envelop...

High Altitude Propeller Design and Analysis Overview

Computational Analysis of Propeller Sheet Cavitation and Propeller-ship Interaction

This paper describes a computational procedure which is being developed for the practical analysis of propeller sheet cavitation and propeller-ship interaction including hull pressure fluctuations. The computational procedure consists of three different, coupled methods: (i) a RANS method for the analysis of the viscous flow around the ship hull and the determination of the velocity field in th...

Propeller Design and Analysis for a Small , Autonomous UAV

An experimental study was performed to design and analyze a "pusher" propeller for use by a small, expendable, autonomous unmanned aerial vehicle (UAV) whose mission was to descend from 30,000 feet to sea level at an approximately constant descent rate over a 3-hour mission duration. The entire propeller design process, from airfoil selection to final part generation in the computer-aided draft...

Parallel Processing System Design with "Propeller" Processor

This is a technical and experimental report of parallel processing, using the "Propeller" chip. Its eight 32 bits processors (cogs) can operate simultaneously, either independently or cooperatively, sharing common resources through a central hub. I introduce this unique processor and discuss about the possibility to develop interactive systems and smart interfaces in media arts, because we need...