Over the course of the past century, the global automotive industry’s stance towards safety has evolved from one of contempt to one nearing reverence. A suspension system that provides safe handling and cornering capabilities can, with the help of an efficient braking system, improve safety to a large extent. The aim of this research is to propose a new automotive brake rotor design and to comp...

The paper proposes a methodology for reliable design and maintenance of wind turbine rotor blades using a condition monitoring approach and a damage tolerance index coupling the material and structure. By improving the understanding of material properties that control damage propagation it will be possible to combine damage tolerant structural design, monitoring systems, inspection techniques a...

Quad-rotor helicopter is an Unmanned Aerial Vehicle (UAV), whose lift is generated by four rotors located on the corner of X-shape. Due to simplicity of its dynamics and its ability to hover, quadrotor helicopter becomes as a popular platform for UAV. Current designs mostly consider a linear model for controller design. In this paper, we derivate nonlinear dynamic equations of the quadrotor UAV...

We report on the design of two different surface acoustic wave (SAW) driven rotary motors. Both designs use 20–30 MHz transducers patterned onto Lithium Niobate (LN), geometrically tailored to generate Rayleigh waves that are incident on opposing sides of each rotor. The first design exploits the efficient coupling between SAWs and fluids by use of a fluid coupling layer between the rotor and s...

In this paper we present the modeling and control designs for a variable-speed constant-frequency wind energy conversion system using double fed induction generator (DFIG). The aim of this paper is to design and compare two distinct control strategies to control the rotor side converter and two control strategies to control the grid side converter. For the rotor side converter (RSC), a backstep...

Two major barriers to widespread US acceptance of offshore wind energy is reliability of rotor blades and the difficulty to access for inspection and maintenance. This work presents operation and design strategies aimed to increase blade reliability and maximize power production. Operating strategies that prolong blade life while optimizing energy output allow for smarter maintenance planning a...

This paper shows how simulation of screw rotor profile manufacturing can be used in the design phase to assess profile alternatives. To do this, variations in manufacturing parameters are studied to illustrate how these deviations affect different rotor profile shapes and the resulting rotor pair clearances. INTRODUCTION Clearances between rotors in a twin screw compressor play a key role in de...

Designs are constructed that limit the number of treatment combinations within subsets of factors. Such designs came to our attention in the context of machine assembly experiments [1,2]. For example, to improve a stepper motor, we plan a 2 design to investigate four rotor factors and a similar 2 design to investigate four stator factors. The product of these two arrays to study the eight facto...