Abstract: A steering control device capable of causing a steering torque to follow a target steering torque when a driver holds a steering wheel for steering, and making an adjustment so that the steering wheel returns to a neutral position at an appropriate speed, when the driver releases his or her hands from the steering wheel. A motor is controlled based on a motor steering assist torque, which is a sum of a first steering assist torque, which is proportional to an integral value of a deviation between the target steering torque and the steering torque, and a second steering assist torque, which is proportional to a motor rotational angular velocity and acting in a direction of suppressing a return speed of the steering wheel when the steering wheel returns to the neutral position.

Abstract: To include a pulse counting unit, a pulse timing unit, an overflow detection unit that holds a detected matter in an overflow register, a capture unit that holds an output of the pulse counting unit in a pulse counting register and holds an output of the pulse timing unit in a pulse timing register, and a computation unit (frequency calculation unit) that reads the pulse counting register, the pulse timing register, and the overflow register to calculate a frequency computation value, and when the pulse timing unit has overflowed, the computation unit adds a predetermined constant acquired by a period of a capture clock a period of a timing clock to pulse timing data at the previous interrupt to obtain pulse timing data acquired by a period of time from the last pulse edge a period of the timing clock.

Abstract: A tensioning sheave apparatus main body has a tensioning sheave around which the speed governor rope is wound. The tensioning sheave apparatus main body is suspended on the speed governor rope to apply tension. Vertical displacement of the tensioning sheave apparatus main body is guided by a tensioning sheave rail. A braking force generating apparatus suppresses upward displacement of the tensioning sheave apparatus main body by a braking force that is generated by gripping the tensioning sheave rail. The braking force generating apparatus allows the upward displacement of the tensioning sheave apparatus main body when the magnitude of an upward force that acts on the tensioning sheave apparatus main body is greater than or equal to a fixed value.