Aggregate production planning for highly re–entrant production processes is typically generated by finding optimal release rates based on clearing function models. For production processes with very long cycle times, like in semiconductor production, dispatch policies are used to cover short term fluctuations. We extend the concept of a clearing function to allow control over both, the release ...

in this paper, a novel approach for control of the dc-dc buck converter in high-power and low-voltage applications is proposed. designed method is developed according to state feedback linearization based controller , which is able to stabilize output voltage in a wide range of operation. it is clear that in high-power applications, parasitic elements of the converter may become comparable with...

In this paper, dynamic performance of a transformerless cascaded PWM static synchronous shunt compensator (STATCOM) based on a novel control scheme is investigated for bus voltage regulation in a 6.6kV distribution system. The transformerless STATCOM consists of a thirteen-level cascaded H-bridge inverter, in which each voltage source H-bridge inverter should be equipped with a floating and iso...

Power system blackouts have become a serious problem for electric utilities especially in recent years. Different forms of system instability have emerged in recent blackouts, such as voltage instability and frequency instability. To counteract each form of system instability, special algorithms have been designed in the protection system, e.g. Under Frequency Load Shedding (UFLS) and Under Vol...

A novel topology, Current-Sourcing Push-Pull Parallel-Resonance Inverter (CS-PPRI) was investigated theoretically and experimentally. The proposed power stage is built around a current fed push pull inverter. The main features of the proposed inverter is a load independent output current and Zero Voltage Switching (ZVS). It is suggested that the proposed CS-PPRI is a viable al ternat ive for re...

Micromechanical structures have been designed, fabricated in silicon and tested for use as on-chip voltage reference. Applications are in electrical metrology and in integrated silicon microsystems. Microbeams of 100 μm length, 3 μm width and 11μm thickness are electrostatically actuated with a very reproducible pull-in voltage at 9.1 V. Devices demonstrated an initial drift of -12 mV over 10 d...

Electrostaticmicroelectromechanicalsystems (MEMS) actuators suffer from an instability called pull-in, wherein the movable electrode snaps onto fixed beyond a certain applied voltage. Thus, entire allowed range is not utilized for stable operation. We propose pull-in free, low-voltage operation by using cubic nonlinear spring with ferroelectric negative-capacitance hybrid MEMS actuator. use phy...