The present invention relates to the field of authentication systems. More particularly, it relates to electronic signal-based authentication system. It relates to authentication system which integrates into devices in electro-mechanical systems without interfering with any of its internal functions and hence provides ease of maintenance and upgradability. The present invention relates to prevention of un-authorized usage of electro-mechanical systems. To demonstrate the signal-based authentication, the vehicle is chosen as a candidate system, since vehicles are part of daily life and has widespread usage all over the world. As an embodiment of electro-mechanical device, the present invention covering vehicle anti-theft authentication system, suggests electronic signal intervention/modification unit [5] comprising of one or more microprocessors with embedded computer instructions, input-output ports, networking units, communication units, display units resulting in a highly secure authentication mechanism to prevent vehicle from being burgled and driven away.

An apparatus for driving a motor of an MDPS may include: first to fourth driving power supply units configured to supply driving power to a driving motor; first to fourth inverters configured to switch the driving power supplied from the first to fourth driving power supply units, and supply the switched driving motor to the driving motor, in order to drive the driving motor; first to fourth driving units configured to drive the first to fourth inverters, respectively; a first control unit configured to operate the driving motor by switching the first and second inverters through the first and second driving units; a second control unit configured to operate the driving motor by switching the third and fourth inverters through the third and fourth driving units.

The present invention provides a rotation angle detection device that detects a steering state quantity of steer-by-wire. The rotation angle detection device includes a drive gear that rotates along with the rotation of a rotating shaft part, first through third driven gears that rotate in conjunction with the drive gear and have different numbers of teeth that are indivisible by each other, sensors that detect the amounts of rotation and are provided for the respective first through third driving gears, a rotation amount generating unit that generates the amount of rotation of the drive gear by combining the amounts of rotation of different driven gears, and power supply circuits each of which is provided for a combination of sensors that detect the amounts of rotation of different driven gears. This configuration makes it possible to improve robustness against failure of sensor elements and power supply circuits.

A steering control device is configured to control steering via a steering actuator of a vehicle. The steering control device includes a condition determination unit and a steering maintenance unit. The condition determination unit is configured to determine whether a maintenance condition required to keep a steering angle at a stop control angle is satisfied, the steering angle being given by the steering actuator to a tire of the vehicle, the stop control angle being the steering angle which is to be given at a stop position where the vehicle stops traveling. The steering maintenance unit is configured to keep the steering angle at the stop control angle in a pre-stop traveling section in which the vehicle travels until the vehicle arrives at the stop position after the maintenance condition is satisfied.

Inspection robots and methods for inspection of curved surfaces with sensors at selected horizontal distances are described. An example of such an inspection robot includes a housing; a drive module with a wheel and a motor operatively linked to the housing, a plurality of sensor sleds, and a payload. The payload, which is coupled to the housing, may include a first and a second rail component, each with at least one connector, where the rail components are connectable at a first selected position of a plurality of discrete engagement positions. Each of the rail components may be structured to support at least one of the plurality of sleds where each of the plurality of sleds is coupled to the payload at a respective selected horizontal position such that the plurality of sleds are at selected horizontal distances from each other.

A vehicle includes a battery, a motor supplied with an input voltage, an inverter configured to boost the input voltage supplied to the motor to output to the battery, a voltage measuring device configured to measure the input voltage, a switching device connected to a neutral point of the motor, and a controller that determines whether fusion of the switching device occurs, repeats on/off of the switching device based on the determination result, measures a first voltage applied to the voltage measuring device, measures a second voltage applied to the voltage measuring device after discharging the voltage measuring device, compares the first voltage with the second voltage, and charges the battery when the fusion of the switching device is released based on the comparison result.

Provided are an electronic controller, an electric drive device, and an electric power steering apparatus that allow miniaturization and facilitate assembling work. An electronic controller 9 includes a board 31 and a connector assembly 41. The board 31 has connection holes 32 into which coil wires are inserted. The connector assembly 41 includes a flat plate portion 42 that leaves one side in the axial direction of an area of the board 31 open, the area including the connection holes, while covering a part of the board 31, and connector housings 44 provided on the flat plate portion 42, the connector housings 44 each allowing a terminal of an external device to be inserted therein along the axial direction.

An object of the present invention is to provide a steering control device and a steering control method that can reduce a driving burden imposed on a driver during low velocity driving. The present invention is provided with an arithmetic logic unit that changes a steering angle of a wheel 11 by driving a wheel steering actuator 7 based on a manipulated variable of a steering 3, and calculates a controlled variable of the wheel steering actuator 7. In turning the steering 3, the arithmetic logic unit controls the wheel steering actuator 7 based on a first gain at which a ratio of an actual steering angle of the wheel 11 changes with respect to a steering angle δ, and in returning the steering 3, the arithmetic logic unit controls the wheel steering actuator 7 based on a second gain that differs from the first gain.

When an external detection device detects an obstacle (another vehicle (T)) on either a left or right side of the own vehicle (M), a control device of a steering assistance device for a saddle type vehicle controls an assist torque so that a handle operation to the side opposite to the side on which the obstacle is detected becomes heavier (more difficult to turn) than a case in which the obstacle is not detected. The handle operation to the side on which the obstacle is detected makes a handle relatively light (makes it easier to turn) while steering assist is maintained.

A circuit board comprising a first power terminal, a second power terminal spaced apart from the first power terminal, a first ground terminal, a second ground terminal spaced apart from the first ground terminal, a first magnetic element part disposed along a first circular arc having a first radius, and a second magnetic element part disposed along a second circular arc having a second radius greater than the first radius, wherein an angle of at least one portion of the first circular arc is not overlapped with an angle of the second circular arc.