Stable operation of grid-connected converters with the LCL filter is essential. Variations grid impedance and consequently, variations resonance frequency, can push system toward instability. Also, delay that comes from sampling PWM, could worsen stability condition. Thus, control should be designed by considering these non-ideal factors. To fill in this gap, brief presents an effective but sim...

This paper presents a novel methodology for design of operational computational devices, realizing a diversity of condition-controlled loop algorithmic structures. The synthesis of such a structure takes in count just the necessary for the computation signal changes, which makes the synthesis of controlling finite state machine unnecessary. Thus the resulting controlling circuit is tightly coup...

We have developed a new method of iodocyclization based on reagent-controlled oxidative aromatization. Our strategy takes advantage of the dual nature of iodine as both an iodinating and an oxidizing agent. This approach enabled "product switch" and enhanced the flexibility of the synthetic pathway toward pyrazoles and isoxazoles. In addition, the iodo moiety of the cyclized product could creat...

A multi-DOF ultrasonic motor developed by the authors can generate multi-DOF rotation of a spherical rotor using three orthogonal natural vibrations of a bar-shaped stator. The ultrasonic motor is suitable for making small, lightweight and simple multi-DOF motion unit. In the present paper, a control methodology for the multi-DOF ultrasonic motor is proposed and a motion control test using the ...

The use of feedback created by electric guitars and amplifiers is problematic in musical settings. For example, it is difficult for a performer to accurately obtain specific pitch and loudness qualities. This is due to the complex relationship between these quantities and other variables such as the string being fretted and the positions and orientations of the guitar and amplifier. This resear...

Controlling false acceptance errors is of critical importance in many pattern recognition applications, including signature and speaker veri$cation problems. Toward this goal, this paper presents two post-processing methods to improve the performance of hyperspherical classi$ers in rejecting patterns from unknown classes. The $rst method uses a self-organizational approach to design minimum rad...