A posture control apparatus, comprising a control unit that determines, on a basis of a static acceleration component, a gravity direction in a holding apparatus holding an object to be held, the static acceleration component being computed on a basis of a first acceleration detection signal and a second acceleration detection signal, the first acceleration detection signal being acquired by detecting a dynamic acceleration component acting on the holding apparatus, the second acceleration detection signal being acquired by detecting the dynamic acceleration component and the static acceleration component acting on the holding apparatus, and controls, by controlling posture of the holding apparatus on a basis of the gravity direction, posture of the object to be held.

[Object] To provide a technology capable of accurately controlling posture of an object to be held.

[Solving Means] A posture control apparatus according to the present technology includes a control unit. The control unit determines, on the basis of a static acceleration component, a gravity direction in a holding apparatus holding an object to be held, the static acceleration component being computed on the basis of a first acceleration detection signal and a second acceleration detection signal, the first acceleration detection signal being acquired by detecting a dynamic acceleration component acting on the holding apparatus, the second acceleration detection signal being acquired by detecting the dynamic acceleration component and the static acceleration component acting on the holding apparatus, and controls, by controlling posture of the holding apparatus on the basis of the gravity direction, posture of the object to be held.

A signal processing apparatus according to an embodiment of the present technology includes an acceleration arithmetic unit. The acceleration arithmetic unit extracts, on a basis of a first detection signal and a second detection signal, the first detection signal including information related to an acceleration along at least a uniaxial direction and having an alternating-current waveform corresponding to the acceleration, the second detection signal including the information related to the acceleration and having an output waveform in which an alternating-current component corresponding to the acceleration is superimposed on a direct-current component, a dynamic acceleration component and a static acceleration component from the acceleration.

A vehicle control apparatus according to an embodiment of the present technology includes a control unit. The control unit generates a control signal for controlling behavior of a vehicle body on a basis of a first acceleration detection signal and a second acceleration detection signal, the first acceleration detection signal including information relating to an acceleration acting on the vehicle body, the first acceleration detection signal having an alternating current waveform corresponding to the acceleration, the second acceleration detection signal including information relating to the acceleration, the second acceleration detection signal having an output waveform, an alternating current component corresponding to the acceleration being superimposed on a direct current component in the output waveform.

A motion measurement apparatus according to an embodiment of the present technology includes a controller unit. The controller unit extracts, from an acceleration in each direction of three axes that includes a dynamic acceleration component and a static acceleration component of a detection target that moves within a space, the dynamic acceleration component of the detection target, and generates, as a control signal, a change in kinematic physical quantity of a posture of the detection target from the dynamic acceleration component.

An information processing system according to an embodiment of the present technology includes a controller unit. The controller unit calculates, on a basis of a dynamic acceleration component and a static acceleration component of a detection target moving within a space that are extracted from an acceleration in each direction of three axes of the detection target, a temporal change of the dynamic acceleration component with respect to the static acceleration component, and determines a motion of the detection target on a basis of the temporal change of the dynamic acceleration component.

A sensor element according to an embodiment of the present technology includes a base portion, a movable portion, first and second bridge portions, and an acceleration detector unit. The movable portion is movable relative to the base portion by reception of an acceleration along at least a uniaxial direction. The first bridge portion includes a first beam and a first structure, the first beam extending in a first axis direction parallel to a main surface of the base portion and connecting the base portion and the movable portion, the first structure being provided between the first beam and the base portion and supporting the first beam. The second bridge portion includes a second beam and a second structure, the second beam extending in a second axis direction orthogonal to the first axis and parallel to the main surface and connecting the base portion and the movable portion, the second structure being provided between the second beam and the base portion and supporting the second beam. The acceleration detector unit is disposed on each of the first beam and the second beam and outputs a first detection signal corresponding to an amount of deformation of each of the first beam and the second beam.

An inertial force sensor includes: an acceleration detection element; a temperature sensor that detects an ambient temperature of the acceleration detection element; a bridge circuit that processes an output signal from the acceleration detection element; an AD converter that converts an analog signal output from the bridge circuit into a digital signal, and outputs the digital signal; a calculation circuit that performs calculation on the output signal from the AD converter; and a storage that stores correction data for correcting a variation in the output signal from the AD converter due to a temperature change. The correction data are coefficients of a formula expressed by a calibration curve that is a quadratic or higher-degree curve, and the storage stores, as the correction data, the coefficients of the calibration curve of each of a plurality of patterns that differ between a predetermined temperature or more and less than the predetermined temperature.

There is provided a MEMS sensor including: a mass body; a support part floatably supporting the mass body; and a flexible beam having one end connected to the mass body and the other end connected to the support part. At least one end of the flexible beam connected to the mass body or the support part includes a curved portion to maximize an effective length supporting a load.

An acceleration sensor includes: a semiconductor substrate that includes a support substrate and a semiconductor layer; a first-direction movable electrode; a second-direction movable electrode; a first-direction fixed electrode; a second-direction fixed electrode; and a support member. The acceleration sensor is configured to detect acceleration in a first direction in the surface direction of the semiconductor substrate and acceleration in a second direction orthogonal to the first direction and parallel to the surface direction. The first-direction movable electrode and the first-direction fixed electrode are provided such that an angle formed by an extended direction of the first-direction movable electrode and the first-direction fixed electrode and the second direction is sin.sup.1(d/L)[deg], and the second-direction movable electrode and the second-direction fixed electrode are provided such that an angle formed by an extended direction of the second-direction movable electrode and the second-direction fixed electrode and the first direction is sin.sup.1(d/L)[deg].