A controller controls precession of a gyroscope that oscillates about a precession axis perpendicular to a spin axis and a roll axis of the gyroscope. To do so, the controller detects a deviation of a center of the oscillation away from a nominal center. The precession is caused by roll of the gyroscope about the roll axis and imposes decreasing amounts of damping upon the roll as the precession moves away from the nominal center. The controller reduces the deviation of the center of the oscillation by applying an asymmetric amount of braking to the precession when the precession and the deviation are in a same direction relative to when the precession and the deviation are in opposing directions.

The invention pertains to the field of gyroscopes, in particularto quantum gyroscopes. The invention provides a gyroscope employing an ensemble of NV-centers in diamond, which includes a diamond plate, a source of green light, an optical system for directing the green light to the diamond plate, a photodetector for registering fluorescence of the color centers in the diamond plate, optical elements that direct the fluorescence from the diamond plate to the photodetector, a source of microwave radiation, a source of radiofrequency radiation, and a source of constant magnetic field, the gyroscope being different from the prior art in that it comprises an energy-efficient antenna that creates a strong longitudinal homogeneous field in the entire volume of the diamond plate with the possibility of frequency adjustment, as well as a system for locking the frequency of the microwave field to that of the transition in the color centers. The invention allows to reduce the volume of the sensing element, provides high relative spectral sensitivity, and allows to create a hybrid device that comprises a 3-axis gyroscope, a magnetometer, and a temperature sensor.

The invention pertains to the field of gyroscopes, in particularto quantum gyroscopes. The invention provides a gyroscope employing an ensemble of NV-centers in diamond, which includes a diamond plate, a source of green light, an optical system for directing the green light to the diamond plate, a photodetector for registering fluorescence of the color centers in the diamond plate, optical elements that direct the fluorescence from the diamond plate to the photodetector, a source of microwave radiation, a source of radiofrequency radiation, and a source of constant magnetic field, the gyroscope being different from the prior art in that it comprises an energy-efficient antenna that creates a strong longitudinal homogeneous field in the entire volume of the diamond plate with the possibility of frequency adjustment, as well as a system for locking the frequency of the microwave field to that of the transition in the color centers. The invention allows to reduce the volume of the sensing element, provides high relative spectral sensitivity, and allows to create a hybrid device that comprises a 3-axis gyroscope, a magnetometer, and a temperature sensor.

Demodulation circuitry includes an input terminal configured to be coupled to an analog-to-digital converter (ADC) and configured to receive a plurality of ADC outputs. The plurality of ADC outputs are generated based on resolver outputs. The demodulation circuitry also includes a rectifier configured to rectify the plurality of ADC outputs. Rectifying the plurality of ADC outputs preserves a phase of the plurality of ADC outputs. The demodulation circuitry includes amplitude determination circuitry configured to determine, based on the rectified plurality of ADC outputs, demodulated amplitude values corresponding to the resolver outputs. The demodulation circuitry further includes angle computation circuitry configured to generate position outputs based on the demodulated amplitude values.

Techniques and devices for optical sensing of rotation based on measurements and sensing of optical polarization or changes in optical polarization in light waves in an optical loop due to rotation without using optical interferometry and a closed loop feedback in modulating the light in the optical loop.

Techniques and devices for optical sensing of rotation based on measurements and sensing of optical polarization or changes in optical polarization in light waves in an optical loop due to rotation without using optical interferometry and a closed loop feedback in modulating the light in the optical loop.

A hybrid inertial measurement unit (IMU) comprises: a low frequency (LF) sensor providing a first signal containing information for a first parameter of the hybrid IMU; a shock resistant (SR) sensor providing a second signal containing information for the first parameter, wherein the SR sensor is resistant to destabilization during a destabilizing operational period; and a processor, wherein the processor further comprises: a weighting factor computation module to compute a weight to be applied to the first signal and to compute a weight to be applied to the second signal; a LF weighting module to apply the computed weight to the first signal to create a weighted first signal; a SR weighting module to apply the computed weight to the second signal to create a weighted second signal; and a compensator to combine the weighted first signal and the weighted second signal to create a compensated signal containing information for the first parameter.

A gyroscopic motion feedback device utilizes one or more pairs of masses mounted on a common axis but independently rotatable to allow rapid variation of the gyroscopic force produced thereby. A sensor detects motion of the mount and a controller uses the detected motion to vary the relative rotational speed of the masses. The device provides haptic feedback where the mount is used to the control the interaction of an objection in a virtual environment, with the controller further varying the relatively rotational speed based on virtual interactions experienced by the object.

An electronic device comprises: a memory; a battery; a speaker; a sensor module; a communication module; and a processor electrically connected to the memory, the battery, the speaker, the sensor module, and the communication module, wherein the processor is configured to: control the communication module to establish a first communication link with a sound source electronic device and transmit a first posture value calculated based on a sensor value obtained from the sensor module over the first communication link, receive audio data rendered based on the posture value from the sound source electronic device, communicate, based on device state information of the electronic device, with an external electronic device through a second communication link so as to request a role switching preparation, and transmit a role switching message to the external electronic device and notify the sound source electronic device of role switching with the external electronic device, wherein after role switching, the electronic device transmits the first posture value to the external electronic device.

An electronic device comprises: a memory; a battery; a speaker; a sensor module; a communication module; and a processor electrically connected to the memory, the battery, the speaker, the sensor module, and the communication module, wherein the processor is configured to: control the communication module to establish a first communication link with a sound source electronic device and transmit a first posture value calculated based on a sensor value obtained from the sensor module over the first communication link, receive audio data rendered based on the posture value from the sound source electronic device, communicate, based on device state information of the electronic device, with an external electronic device through a second communication link so as to request a role switching preparation, and transmit a role switching message to the external electronic device and notify the sound source electronic device of role switching with the external electronic device, wherein after role switching, the electronic device transmits the first posture value to the external electronic device.