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A fuzzy-PID speed controller proposed in this paper is designed for the Doubly Salient Motor (DSM) with axial flux, which has high efficiency of rotor and power density. This paper started from the structure and mathematical model of axial flux DSM, and then analyzed its operating characteristics. Due to nonlinear functions of Flux and torque rotor position and phase current, application of linear...
Inverse radiation problem for one-dimensional non-uniform medium has been investigated. A stochastic particle swarm optimization algorithm (SPSO) with a stochastic selection is adopted to estimate the absorption coefficients in a one-dimensional absorbing, emitting medium. The directional radiative intensities simulated by discrete ordinate method are served as input for the inverse problems. The...
Kalman filter is widely applied in engineering as its realtime recursive theory. Traditional design flow to implement the filter has problems of repetive description and hidden mistakes, because system is programmed again after the simulation and verification in Matlab environment. The paper proposes a novel approach to realize Kalman filtered system, in which designs system from Matlab model directly...
One position controlling source using sinusoidal wave by CPLD through linear amplifier technique for driving ring-type traveling-wave ultrasonic motor with 30 mm diameter of the stator (RTWUSM30) has been proposed and designed in this paper. The driving and controlling signals can be adjusted the frequency, the phase, the amplitude, and the phase difference of the two sin wave exciting signals through...
Based on the vibration modes of the cylinder stator by finite elements analysis (FEM), the kinetic model of locus is presented for the 3-DOF USM with spherical rotor and cylinder stator in this paper. The geometric locus of particles on the top of the cylinder stator, including the vibration amplitudes of two bending modes are equal to the longitudinal mode or not, has been already drawn out in theory...
It is shown that loading ultra-high molecular weight polyethylene (UHMW-PE) fibres up to about 50% of their theoretical strength causes bond scission to occur as corroborated from the number of radicals monitored. In addition, a creep test on UHMW-PE fibres also showed an ongoing production of radicals in the polymer. Although precise quantification of the radical concentration is difficult, a first...
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