Deborah Sigel - Academia.edu (original) (raw)
Uploads
Papers by Deborah Sigel
In many applications, piezoelectric transducers are driven at AC voltage levels well beyond the l... more In many applications, piezoelectric transducers are driven at AC voltage levels well beyond the level for which the material was nominally characterized. In this paper we describe an experimental setup that allows for the determination of the main transducer or resonator properties under large AC drive. A sinusoidal voltage from a waveform generator is amplified and applied across the transducer/resonator in series with a known high power resistor. The amplitude of applied voltage and the amplitude and the relative phase of the current through the resistor are monitored on a digital scope. The frequency of the applied
An artificial satellite independent localization system for a lunar rover using the stars for nav... more An artificial satellite independent localization system for a lunar rover using the stars for navigation is described. The system uses a wide field-of-view star tracker and wide range high precision inclinometers to determine location on the Moon using quaternion output from the star tracker along with pitch and roll data from the inclinometer.
In many applications, piezoelectric transducers are driven at AC voltage levels well beyond the l... more In many applications, piezoelectric transducers are driven at AC voltage levels well beyond the level for which the material was nominally characterized. In this paper we describe an experimental setup that allows for the determination of the main transducer or resonator properties under large AC drive. A sinusoidal voltage from a waveform generator is amplified and applied across the transducer/resonator in series with a known high power resistor. The amplitude of applied voltage and the amplitude and the relative phase of the current through the resistor are monitored on a digital scope. The frequency of the applied
An artificial satellite independent localization system for a lunar rover using the stars for nav... more An artificial satellite independent localization system for a lunar rover using the stars for navigation is described. The system uses a wide field-of-view star tracker and wide range high precision inclinometers to determine location on the Moon using quaternion output from the star tracker along with pitch and roll data from the inclinometer.