The Inertially Stabilized Rifle is a new stabilized rifle system that can eliminate the disturbances induced by the shooter. Recurve actuator is used in this system to provide the precise movement of the rifle barrel. In such a portable device, only low voltage electrical sources are available yet the piezoelectric actuator needs high voltage to drive the actuator. The actuators consume little ...

In a power grid used to distribute electricity, optical fibers can be inserted inside overhead ground wires to form an optical network infrastructure for data communications. Dense wavelength division multiplexing (DWDM)-based optical networks present a promising approach to achieve a scalable backbone network for power grids. This paper proposes a complete optimization procedure for optical ne...

In this paper we look at the load presented to audio amplifiers by real transducers. We consider the power losses in Class-AB and Class-D amplifier topologies, and determine that in order to predict efficiency it is necessary to consider the amplifier/transducer combination. The ability of the class-D amplifier to recycle quadrature load current offers new ways to improve efficiency. INTRODUCTI...

In this paper we look at the load presented to audio amplifiers by real transducers. We consider the power losses in Class-AB and Class-D amplifier topologies, and determine that in order to predict efficiency it is necessary to consider the amplifier/transducer combination. The ability of the class-D amplifier to recycle quadrature load current offers new ways to improve efficiency. INTRODUCTI...

The fundamental problem of pulse-width modulation (PWM) based open-loop digital Class-D audio power amplifiers is the inherent nonlinearity of the PWM process, which necessitates the application of a precompensating linearization algorithm. Severe technical difficulties arising from the stringent speed requirements of both electronic circuitry, and digital signal processing devices make the imp...

Piezoelectric actuators are widely used in smart materials for vibration and noise control, precision actuators, etc. [1]. These actuators are largely capacitive and the reactive power applied on them can go to several tens of Watts. High-voltage, high-power class-D amplifiers [2-5] are ideal drivers for such loads, because of their high power efficiency. Preferably, efficiency should be high b...

Particle accelerators usually require high voltage and high power. Typically, the high voltage/power generation utilizes a topology with an energy store and switching mechanisms to extract that stored energy. The switches may be active or passive devices. Active switches are hard or soft vacuum tubes, or semiconductors. When required voltages exceed tens of kilovolts, numerous semiconductors ar...

A biopotential amplifier for single supply operation is presented. It uses a Driven Right Leg Circuit (DRL) to drive the patient's body to a DC common mode voltage, centering biopotential signals with respect to the amplifier's input voltage range. This scheme ensures proper range operation when a single power supply is used. The circuit described is especially suited for low consumption, batte...

MIRZAEE TESHNIZI, HESAMEDDIN. Medium-Voltage DC Power Conversion and Distribution for Efficient Electric Power Delivery in Shipboard and Mobile Mining Application. (Under the direction of Dr. Subhashish Bhattacharya). Medium-Voltage DC (MVDC) distribution and power conversion systems have become more attractive in recent years due to advances in power electronic technology. It can be used in a ...