Hrl Laboratories, LLC

The Boeing Company

Matthew J Pelliccione

David T Chang

Logan D Sorenson

Raviv Perahia

Hung P Nguyen

Biqin Huang

Edward H Chen

Tobias A Schaedler

Rongsheng Li

Phuong Bui

Lian X Huang

Brian Christopher Grubel

Danny M Kim

Kayleigh A Porter

Patrick J Webb

Travis M Autry

Hung Nguyen

James H Kober

A CVG having an axisymmetric resonator with first and second degenerate vibratory modes, having respectively first and second mode resonance frequencies (ω1, ω2) wherein said first and second mode resonance frequencies differ by a frequency difference (Δω); a plurality of electrodes arranged at a distance around a periphery of the resonator; said plurality of electrodes comprising at least one resonance frequency tuning electrode arranged for, upon application of a first bias voltage signal to said at least one resonance frequency tuning electrode, acting on the frequency difference (Δω) by changing at least one of the first and second mode resonance frequencies; and a resonance frequency loop circuit arranged to generate said first bias voltage signal and regulate a value of said first bias voltage signal to maintain said frequency difference (Δω) at a predetermined minimal value.

Real-time adaptive tuning of gyroscopes via quadrature dithering

A sensor cluster is disclosed comprising a first plurality of side surfaces of a first N-hedron structure, and a second plurality of side surfaces of a second N-hedron structure. A first plurality of a first type of sensor are mounted on the first plurality of side surfaces, and a second plurality of a second type of sensor are mounted on the second plurality of side surfaces. N is greater than three and the first plurality of side surfaces are interleaved with the second plurality of side surfaces.

Double N-hedron sensor cluster

A corner bracket comprising a volume of matter having n pairs of parallel faces, where n is an integer larger than 2; each face of each pair of parallel faces comprising an opening; the openings in the faces of each pair of parallel faces being joined by a cylindrical recess having a longitudinal axis perpendicular to the faces joined by the cylindrical recess; the longitudinal axis of the cylindrical recesses being arranged such that the cylindrical recesses do not intersect each other. The number n can be 3 and the volume of matter can be a cube.

Modular inertial measurement unit and elements for making same

A CVG having a resonator with two degenerated modes each with a nodal direction and an antinodal direction, with drive electrodes arranged near the respective nodal directions of the resonator and sense electrodes arranged near the respective antinodal directions of the resonator.

Gyroscope sensors having nodal push-pull actuation and antinodal readout

A system, apparatus, and method for determining a velocity. A voltage is detected for a planar sensor array while the planar sensor array is moving though a magnetic field, wherein the planar sensor array comprises conductive channels formed in a substrate, wherein the conductive channels are connected in series, and wherein the voltage is generated by the planar sensor array in response to a movement of the planar sensor array through the magnetic field and wherein the voltage is proportional to a velocity of the planar sensor array moving through the magnetic field. The velocity of the planar sensor array is determined using the voltage detected for the conductive channels.

Lorentz force velocity sensor system

A Coriolis vibratory gyroscope having a resonator with at least a first and a second n=2 vibratory modes of same resonance frequency in a resonator plane; first and second sensing circuits for generating first and second sense signals in response to a motion of the resonator along a major axis of the first and second vibratory modes; a first drive circuit for driving the resonator in the first vibratory mode with a first drive signal; a second drive circuit for simultaneously driving the resonator in the second vibratory mode with a second drive signal; wherein said first signal has a first frequency equal to a resonant frequency of said resonator in said first vibratory mode, and said second signal has the same frequency as the first signal, modulated in amplitude with a second frequency.

Frequency multiplexed operation of vibratory gyroscopes for continuous self-calibration

A CVG having first and second degenerate resonator modes with each a damping rate; drive circuits for causing the resonator to oscillate in the first and second modes in response to first and second drive signals; first and second sense circuits for generating first and second sense signals in response to the resonator oscillating in the first and second modes; a signal processing circuit having control loops for generating the first and second drive signals based on the first and second sense signals; and first and second damping feedback circuits for generating first and second damping feedback signals proportional to the first and second damping rates; an adding the damping feedback signals to the first and second drive signals.

Continuous online self-calibration for gyroscopes through modulation of damping axes

A self-calibration method for an accelerometer having a proof mass separated by a gap from a drive electrode and a sense electrode includes initializing the accelerometer to resonate, applying a first bias voltage to the sense electrode and a second bias voltage to the drive electrode to obtain a first scale factor, measuring a first acceleration over a first time interval, swapping the first bias voltage on the sense electrode with the second bias voltage previously on the drive electrode and the second bias voltage on the drive electrode with the first bias voltage previously on the sense electrode so that a bias voltage on the sense electrode is set to the second bias voltage and a bias voltage on the drive electrode is set to the second bias voltage to obtain a second scale factor, measuring a second acceleration over a second time interval, and calculating a true acceleration.

Continuous online self-calibrating resonant FM microelectromechanical systems (MEMS) accelerometer

A stress isolating interposer includes: an outer pad; an inner pad configured to accommodate a positional sensor is mounted; and a stress isolating structure coupling the outer pad and the inner pad to each other. The outer pad, the stress isolating structure, and the inner pad are a monolithic structure.

Stress isolating interposer and sensor package and method of manufacturing the same

A sensing array includes a plurality of pixels, one pixel of which includes: a sensor, the sensor including a first electrode, a second electrode, and an atomic defect site configured to be excited by light of a first frequency; a light source below the sensor and configured to emit light of the first frequency toward the defect site; and a radio frequency (RF) source below the sensor and configured to provide a first voltage to the first electrode, a second voltage to the second electrode, and an RF signal to the sensor, wherein the sensor is configured to sense a magnitude of a physical parameter by generating a photocurrent corresponding to a magnitude of a physical parameter and a differential between the first and second voltages, when excited by the light of the first frequency and affected by the RF signal.

On-chip excitation and readout architecture for high-density magnetic sensing arrays based on quantum defects

An atomic defect sensor for measuring a magnitude of a physical parameter comprises an optical waveguide comprising an atomic defect site located within the optical waveguide, the optical waveguide being configured to guide an optical signal toward the atomic defect site, a first doped fin integrated with the optical waveguide at a first side of the optical waveguide, and a second doped fin integrated with the optical waveguide at a second side of the optical waveguide, wherein the atomic defect site is configured to be energetically stimulated by the optical signal in the presence of an RF signal, and to generate a photocurrent corresponding to the magnitude of the physical parameter and a voltage differential between the first and second doped fins.

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Malibu, CA, United States of America

Matthew J Pelliccione