Abstract: Centrifugal gyroscopic devices are described herein. A representative device can include a shaft, an arm coupled to the shaft, a rotor coupled to the arm, and a control system operably coupled to the shaft, the arm, and/or the rotor. The shaft is rotatable about a first axis and the arm is configured to rotate with the shaft. The arm is pivotable about a second axis and the rotor is configured to pivot with the arm about the second axis. The rotor is further pivotable about a third axis. The control system is configured to bring the shaft, the arm, and the rotor into a resonant mode in which the shaft rotates at a rotational rate, the arm oscillates about the second axis at a first frequency substantially equal to the rotational rate, and the rotor oscillates about the third axis at a second frequency substantially equal to the first frequency.

Abstract: Centrifugal gyroscopic devices are described herein. A representative device can include a shaft, an arm coupled to the shaft, a rotor coupled to the arm, and a control system operably coupled to the shaft, the arm, and/or the rotor. The shaft is rotatable about a first axis and the arm is configured to rotate with the shaft. The arm is pivotable about a second axis and the rotor is configured to pivot with the arm about the second axis. The rotor is further pivotable about a third axis. The control system is configured to bring the shaft, the arm, and the rotor into a resonant mode in which the shaft rotates at a rotational rate, the arm oscillates about the second axis at a first frequency substantially equal to the rotational rate, and the rotor oscillates about the third axis at a second frequency substantially equal to the first frequency.

Abstract: Gyroscopes and pendulous gyroscopic accelerometers with adjustable scale factor are accomplished through control of the net angular momentum of a gyroscopic element such as a rotating or oscillating wheel or other mass. The sensitivity of a gravity gradiometer can be enhanced through use of such instruments, allowing the development of man-portable gravity gradiometers.

Abstract: A pendulous oscillating gyroscope and accelerometer multisensor having an accelerometer input axis and a gyroscopic input axis, comprising: a fixed case; a servo driven member mounted to the case for sinusoidal oscillation about an accelerometer servo axis which is the same as the gyroscopic input axis; a torque summing member mounted to the servo driven member to allow rotational motion about an output axis transverse to the servo axis; a rotor driven member mounted to the torque summing member for sinusoidal oscillation about a reference axis transverse to both the output axis and the servo axis; and a pendulosity carried by at least one of the torque summing member and the rotor driven member to create a mass imbalance about an output axis, in which pendulosity torque due to acceleration along the accelerometer input axis causes a DC rotation of the torque summing member about the output axis.

Abstract: A pendulous oscillating gyroscopic accelerometer, comprising: a fixed case; a servo driven member mounted to the case for oscillation about a servo axis; a torque summing member mounted to the servo driven member for rotation about an output axis transverse to the servo axis; a rotor driven member mounted to the torque summing member for oscillation about a reference axis transverse to both the output axis and the servo axis; a pendulosity carried by at least one of the torque summing member and the rotor driven member to create a mass imbalance about an output axis; a first oscillation device for oscillating the rotor driven member about the reference axis, the oscillation having a first amplitude, a first frequency and a first phase; a second oscillation device for oscillating the servo driven member about the servo axis, the oscillation having a second amplitude, a second frequency and a second phase; a measurement device for determining the rotation of the torque summing member about the output axis resul

Abstract: A pendulous oscillating gyroscopic accelerometer comprising an unbalanced pendulous mass, pivotable on an output axis, that is oscillated about a reference axis transverse to the output axis. The pendulous mass is also oscillated about an input axis transverse to the reference axis, and the acceleration force along the input axis is determined from at least one of those oscillations.

Abstract: A single vibration sensor having the capability of sensing vibration along three rotational axes as well as three translational axes and exhibiting consistent dynamics over a wide frequency range. The sensor includes an elongated mass formed of a generally rigid material suspended in a fluid within a housing. The exterior surface of the mass is spaced from the interior surface of the housing to permit limited freedom of motion of the mass within the housing. The mass is provided with multiaxial radial and axial electromagnetic suspensions, and is typically supported by a fluid within the housing. Rotational positioning is provided by a signal generator, torque generator combination. Vibration is sensed by additive or differential measurements of current changes in the coils of different axes of the suspensions or electromagnetic signal and torque generator combinations.