Abstract: A data dimensionality reduction method includes: a step of dimensionally reducing a group of data from a high-dimensional space to a low-dimensional space using a distance function that defines a distance between any two vectors in the high-dimensional space; a step of dividing the dimensionally-reduced low-dimensional space into multiple subspaces; an analysis step of performing a regression analysis using a regression model based on at least one belonging data for each divided subspace; and a step of updating p first parameters included in the distance function based on results of the regression analysis in the multiple subspaces.

Abstract: An electric braking device includes an actuator that, in a case in which an electric motor rotates in a second rotational direction due to a piston moving in a second direction which is the direction in which braking force decreases due to an external force, is driven to inhibit the piston from moving in the second direction by using electric power generated by the electric motor as the electric motor rotates in the second rotational direction.

Abstract: This electric braking device comprises a linear motion conversion mechanism having a screw shaft caused to rotate by an electric motor, and a nut that moves linearly in response to the rotation of the screw shaft. The electric braking device generates braking force in a vehicle wheel due to a piston coupled to the nut moving linearly within a cylinder and applying pressure to brake fluid. In the electric braking device, a coil spring, of which the extending/retracting direction is the linear motion direction of the piston, is installed in such a state as to be sandwiched between the piston and the screw shaft, so as to be compressed in response to the linear movement of the screw shaft in a direction for reducing braking force and to generate repulsive force against the compression.

Abstract: An electric braking device generates a braking force at a wheel via application of a pressing force by a piston by linear motion of the piston in response to the transmission of a forward-direction rotational torque from an electric motor to a linear motion conversion mechanism. The electric braking device is provided with a one-way clutch that cuts off the transmission of a rotational torque between the electric motor and the linear motion conversion mechanism when applied with a rotational torque in a direction opposite to the forward direction and having a magnitude equal to or greater than a predetermined value.

Abstract: A data dimensionality reduction method includes: a step of dimensionally reducing a group of data from a high-dimensional space to a low-dimensional space using a distance function that defines a distance between any two vectors in the high-dimensional space; a step of dividing the dimensionally-reduced low-dimensional space into multiple subspaces; an analysis step of performing a regression analysis using a regression model based on at least one belonging data for each divided subspace; and a step of updating p first parameters included in the distance function based on results of the regression analysis in the multiple subspaces.

Abstract: During a normal condition of a braking control device, a first instruction unit gives instructions of braking force to be applied to a first wheel and a third wheel, and a second instruction unit gives instructions of braking force to be applied to a second wheel and a fourth wheel. When a failure occurs in the first instruction unit and the first instruction unit can no longer give the instructions of the braking force to be applied to the first wheel and the third wheel, the second instruction unit takes over the task of giving the instruction of braking force to be applied to the first wheel, and a third instruction unit takes over the task of giving the instruction of braking force to be applied to the third wheel.