Disclosed herein are systems and methods for calculating angular acceleration based on inertial data using two or more inertial measurement units (IMUs). The calculated angular acceleration may be used to estimate a position of a wearable head device comprising the IMUs. Virtual content may be presented based on the position of the wearable head device. In some embodiments, a first IMU and a second IMU share a coincident measurement axis.

A system, power management system and method are disclosed. The power management system includes a pitot tube, one or more heating elements disposed in the pitot tube, and one or more power switches, wherein each power switch of the one or more power switches is coupled to a respective heating element and configured to energize or de-energize the respective heating element in response to a control signal. The power management system also includes a temperature detector coupled to the pitot tube and configured to determine a temperature of the pitot tube, and a processor complex coupled to the one or more power switches and the temperature detector and configured to output the control signal to energize or de-energize at least one of the heating elements through a respective at least one of the respective one or more power switches in response to at least the determined temperature of the pitot tube or a detection of a fault.

A determination apparatus includes circuitry to receive a detection result of a time-varying physical quantity generated by rotation of a rotator attached to a rotation shaft, and rotation angle information of the rotator; and determine a rotation state of the rotator based on the detection result and the rotation angle information.

The disclosure provides a cranial rotation system, including a subject stage configured to support a subject; a cranial support configured to support a cranium of the subject and rotate relative to the subject stage; subject stage a motor configured to rotate the cranial support about a rotational axis; and a controller configured to operate the motor.

Provided are embodiments including a system for performing health monitoring. The system includes a measurement device configured to measure pressure of an environment, a heating element of the heater section coupled to the measurement device, a first sensing element operably coupled to a first region of the measurement device, and a second sensing element operably coupled to a second region of the measurement device. The system also includes a programmable logic that is configured to generate a status signal or flag based at least in part on conditions of the first region or the second region of the measurement device, a processing system configured to control the heating element responsive to reaching a threshold temperature, and a display configured to display a status of the first region or second region of the measurement device based at least in part on the status signal or flag.

Provided are embodiments including a system for performing health monitoring. The system includes a measurement device configured to measure pressure of an environment, a heating element of the heater section coupled to the measurement device, a first sensing element operably coupled to a first region of the measurement device, and a second sensing element operably coupled to a second region of the measurement device. The system also includes a programmable logic that is configured to generate a status signal or flag based at least in part on conditions of the first region or the second region of the measurement device, a processing system configured to control the heating element responsive to reaching a threshold temperature, and a display configured to display a status of the first region or second region of the measurement device based at least in part on the status signal or flag.

Disclosed herein are systems and methods for calculating angular acceleration based on inertial data using two or more inertial measurement units (IMUs). The calculated angular acceleration may be used to estimate a position of a wearable head device comprising the IMUs. Virtual content may be presented based on the position of the wearable head device. In some embodiments, a first IMU and a second IMU share a coincident measurement axis.

A vehicle small in width and capable of ensuring both driving stability and drivability includes: a vehicle body with two or more wheels including steered wheels (right front wheel, left front wheel) for steering; an inclination angle detection part that detects the inclination angle of the vehicle body about a roll axis thereof; and a torque applying part (turning mechanism) that applies a steering torque to the steered wheels in accordance with an inclination angular velocity or an inclination angular acceleration of the vehicle body calculated from the inclination angle.

Disclosed are a ground reaction force index estimation system, a ground reaction force index estimation method, and a ground reaction force index estimation program that can compute ground reaction force indices at low computation costs. The ground reaction force index estimation system comprises footwear and an external device connected to the footwear. The footwear comprises a wearable sensor that measures triaxial acceleration and/or triaxial angular velocity and a computation unit that computes ground reaction force indices by multiple regression analysis from values computed from the measurement results to be used as explanatory variables. The external device comprises a controller that evaluates walking and running motions for the user on the basis of the measurement results by the wearable sensor received from the footwear, the computed ground reaction force indices, and the determination reference information and a presentation unit that presents the results of the evaluation of the running motion.

A physical quantity detection circuit includes a signal conversion circuit configured to output a first differential signal based on an output signal of a physical quantity detection element, an active filter to which a second differential signal based on the first differential signal is input, and an analog/digital conversion circuit configured to sample a third differential signal based on an output signal of the active filter to convert the third differential signal into a digital signal, wherein the active filter includes an operational amplifier, a first chopping circuit disposed in a signal path between the signal conversion circuit and the operational amplifier, and a second chopping circuit disposed in a signal path between the operational amplifier and the analog/digital conversion circuit, and fch<fs/2, the sampling frequency is fs, and the chopping frequency is fch.