This paper considers the optimum design of flexbeam cross-sections for a full-scale bearingless helicopter rotor, using an efficient hybrid optimization algorithm based on particle swarm optimization, and an improved genetic algorithm, with an effective constraint handling scheme for constrained nonlinear optimization. The basic operators of the genetic algorithm, of crossover and mutation, are...

objective: this study was conducted with the aim to investigate and compare iranian produced and foreign oxytocin for use in induction of labor. materials and methods: this random clinical trial was conducted on a population of 198 pregnant women with live fetus and cephalic presentation and conditions conducive to induction of labor, monitored by obstetricians and gynecologists. they were rand...

Bearingless switched reluctance motor (BSRM) has the advantages of high integration and low loss, is especially suitable for flywheel batteries. In order to enhance reliability fault tolerance ability BSRM, a novel dual-channel BSRM proposed in this paper. This combined merits magnetic bearing, can realize fault-tolerant operation. The scalloped rotor poles are evenly distributed on inner outer...

A bearingless machine should be designed to maximize the average and minimize ripple in electromagnetic torque levitating force. In a synchronous reluctance (BSynRM), complex rotor design levitation winding create rich spatial temporal spectrum of magnetic flux density airgap, which affects both force ripple. this article, novel method is introduced compute forces from harmonics airgap density....