Patent ID: 8983727
Filing Date: 2015-03-17
Classification: B62D,H02P

Abstract:
1. A steering control apparatus comprising: a motor for providing assist torque to a steering system which is operated by a driver; a variety of kinds of sensors that detects at least a steering state of said steering system; and a processing unit that has an input processing section for taking in sensor detection signals from said variety of kinds of sensors and an output processing section for driving and said motor, and provides an instruction command to said output processing section based on said sensor detection signals; characterized in that said processing unit includes: a motor target output torque calculation section that calculates a target output torque of said motor; and a motor output torque control unit that calculates an impression voltage to said motor by controlling a motor current flowing in said motor in a feedback manner so as to make an actual output torque of said motor coincide with said target output torque; said motor output torque control unit includes at least: a plurality of main-calculation sections; and a plurality of sub-calculation sections corresponding to said main-calculation sections; wherein at least a part of said sub-calculation sections determine abnormality of said motor output torque control unit based on a comparison between the calculation results of the at least one part of said sub-calculation sections and the calculation results of main-calculation sections corresponding to the at least one part of said sub-calculation sections, and wherein at least part of said plurality of sub-calculation sections checks main-calculation sections corresponding to said part of sub-calculation sections according to an expression different from that in said corresponding main-calculation sections.