| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric power steering device enabling smooth returning steering operation having no sense of incongruity. SOLUTION: A base correction steering angular velocityωmb is operated based on a steering angleθ, a multiplication coefficient value k determined based on steering torque T and a vehicle speed v is multiplied on the base correction steering angular velocityωmb and then an addition coefficient value S determined based on the steering torque T is added to operate a target steering angular velocityωm. A base correction current value Isb is operated based on difference of the target steering angular velocityωm and an actual steering angular velocityωand when a steering returning determination means 43 determines the steering returning state, the base correction current value Isb is made to a returning correction current value Is. When it determines the non-steering returning state, the returning correction current value Is is made to 0. The returning correction current value Is is added to an assist base current value Ib to make it to an assist target current Io. COPYRIGHT: (C)2006,JPO&NCIPI |
